/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_51-mutexptr_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 05:17:28,568 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 05:17:28,639 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 05:17:28,644 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 05:17:28,645 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 05:17:28,668 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 05:17:28,669 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 05:17:28,669 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 05:17:28,670 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 05:17:28,673 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 05:17:28,673 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 05:17:28,673 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 05:17:28,673 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 05:17:28,674 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 05:17:28,674 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 05:17:28,674 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 05:17:28,675 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 05:17:28,675 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 05:17:28,675 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 05:17:28,675 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 05:17:28,675 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 05:17:28,676 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 05:17:28,676 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 05:17:28,676 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 05:17:28,677 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 05:17:28,677 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 05:17:28,677 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 05:17:28,677 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 05:17:28,677 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 05:17:28,677 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 05:17:28,678 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 05:17:28,678 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 05:17:28,678 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 05:17:28,679 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 05:17:28,679 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 05:17:28,679 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 05:17:28,953 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 05:17:28,967 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 05:17:28,969 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 05:17:28,969 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 05:17:28,970 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 05:17:28,971 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_51-mutexptr_racefree.i [2023-08-27 05:17:30,028 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 05:17:30,267 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 05:17:30,267 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_51-mutexptr_racefree.i [2023-08-27 05:17:30,279 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a99a66614/43c96eb2f2854dbd998c3017014728a7/FLAG04bc1d1c8 [2023-08-27 05:17:30,293 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a99a66614/43c96eb2f2854dbd998c3017014728a7 [2023-08-27 05:17:30,296 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 05:17:30,297 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 05:17:30,298 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 05:17:30,298 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 05:17:30,300 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 05:17:30,301 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 05:17:30" (1/1) ... [2023-08-27 05:17:30,301 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e42130f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:17:30, skipping insertion in model container [2023-08-27 05:17:30,301 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 05:17:30" (1/1) ... [2023-08-27 05:17:30,336 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 05:17:30,572 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 05:17:30,582 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 05:17:30,603 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-27 05:17:30,604 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-27 05:17:30,624 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 05:17:30,654 INFO L206 MainTranslator]: Completed translation [2023-08-27 05:17:30,654 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:17:30 WrapperNode [2023-08-27 05:17:30,654 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 05:17:30,655 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 05:17:30,655 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 05:17:30,655 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 05:17:30,659 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:17:30" (1/1) ... [2023-08-27 05:17:30,667 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:17:30" (1/1) ... [2023-08-27 05:17:30,689 INFO L138 Inliner]: procedures = 170, calls = 38, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 97 [2023-08-27 05:17:30,689 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 05:17:30,690 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 05:17:30,690 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 05:17:30,690 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 05:17:30,695 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:17:30" (1/1) ... [2023-08-27 05:17:30,695 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:17:30" (1/1) ... [2023-08-27 05:17:30,707 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:17:30" (1/1) ... [2023-08-27 05:17:30,707 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:17:30" (1/1) ... [2023-08-27 05:17:30,717 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:17:30" (1/1) ... [2023-08-27 05:17:30,720 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:17:30" (1/1) ... [2023-08-27 05:17:30,723 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:17:30" (1/1) ... [2023-08-27 05:17:30,724 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:17:30" (1/1) ... [2023-08-27 05:17:30,725 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 05:17:30,726 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 05:17:30,726 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 05:17:30,726 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 05:17:30,727 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:17:30" (1/1) ... [2023-08-27 05:17:30,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 05:17:30,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 05:17:30,765 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 05:17:30,768 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 05:17:30,793 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 05:17:30,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 05:17:30,793 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-27 05:17:30,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 05:17:30,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 05:17:30,794 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-27 05:17:30,794 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-27 05:17:30,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 05:17:30,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 05:17:30,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 05:17:30,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 05:17:30,795 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 05:17:30,897 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 05:17:30,899 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 05:17:31,075 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 05:17:31,081 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 05:17:31,081 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-27 05:17:31,083 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:17:31 BoogieIcfgContainer [2023-08-27 05:17:31,083 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 05:17:31,084 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 05:17:31,085 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 05:17:31,087 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 05:17:31,087 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 05:17:30" (1/3) ... [2023-08-27 05:17:31,088 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34f713d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 05:17:31, skipping insertion in model container [2023-08-27 05:17:31,088 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:17:30" (2/3) ... [2023-08-27 05:17:31,088 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34f713d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 05:17:31, skipping insertion in model container [2023-08-27 05:17:31,088 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:17:31" (3/3) ... [2023-08-27 05:17:31,089 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_51-mutexptr_racefree.i [2023-08-27 05:17:31,102 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 05:17:31,103 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2023-08-27 05:17:31,103 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 05:17:31,141 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-27 05:17:31,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 145 transitions, 298 flow [2023-08-27 05:17:31,213 INFO L124 PetriNetUnfolderBase]: 19/187 cut-off events. [2023-08-27 05:17:31,213 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-27 05:17:31,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193 conditions, 187 events. 19/187 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 465 event pairs, 0 based on Foata normal form. 0/155 useless extension candidates. Maximal degree in co-relation 94. Up to 4 conditions per place. [2023-08-27 05:17:31,218 INFO L82 GeneralOperation]: Start removeDead. Operand has 135 places, 145 transitions, 298 flow [2023-08-27 05:17:31,221 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 127 places, 136 transitions, 277 flow [2023-08-27 05:17:31,223 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:17:31,230 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 127 places, 136 transitions, 277 flow [2023-08-27 05:17:31,232 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 127 places, 136 transitions, 277 flow [2023-08-27 05:17:31,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 136 transitions, 277 flow [2023-08-27 05:17:31,256 INFO L124 PetriNetUnfolderBase]: 18/178 cut-off events. [2023-08-27 05:17:31,257 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 05:17:31,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 178 events. 18/178 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 447 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 94. Up to 4 conditions per place. [2023-08-27 05:17:31,260 INFO L119 LiptonReduction]: Number of co-enabled transitions 4472 [2023-08-27 05:17:34,239 INFO L134 LiptonReduction]: Checked pairs total: 7548 [2023-08-27 05:17:34,240 INFO L136 LiptonReduction]: Total number of compositions: 128 [2023-08-27 05:17:34,259 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:17:34,263 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;@e22e6eb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:17:34,263 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:17:34,271 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:17:34,271 INFO L124 PetriNetUnfolderBase]: 3/23 cut-off events. [2023-08-27 05:17:34,272 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 05:17:34,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:17:34,272 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-27 05:17:34,272 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:17:34,275 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:17:34,276 INFO L85 PathProgramCache]: Analyzing trace with hash -986735114, now seen corresponding path program 1 times [2023-08-27 05:17:34,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:17:34,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804604236] [2023-08-27 05:17:34,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:17:34,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:17:34,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:17:34,363 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:17:34,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:17:34,389 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:17:34,390 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:17:34,390 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:17:34,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 05:17:34,392 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 05:17:34,393 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:17:34,393 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:17:34,393 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-27 05:17:34,414 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-27 05:17:34,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 190 transitions, 398 flow [2023-08-27 05:17:34,472 INFO L124 PetriNetUnfolderBase]: 34/311 cut-off events. [2023-08-27 05:17:34,472 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-27 05:17:34,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 311 events. 34/311 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 992 event pairs, 0 based on Foata normal form. 0/252 useless extension candidates. Maximal degree in co-relation 189. Up to 8 conditions per place. [2023-08-27 05:17:34,476 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 190 transitions, 398 flow [2023-08-27 05:17:34,478 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 175 places, 190 transitions, 398 flow [2023-08-27 05:17:34,478 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:17:34,478 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 175 places, 190 transitions, 398 flow [2023-08-27 05:17:34,479 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 175 places, 190 transitions, 398 flow [2023-08-27 05:17:34,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 190 transitions, 398 flow [2023-08-27 05:17:34,506 INFO L124 PetriNetUnfolderBase]: 34/311 cut-off events. [2023-08-27 05:17:34,507 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-27 05:17:34,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 311 events. 34/311 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 992 event pairs, 0 based on Foata normal form. 0/252 useless extension candidates. Maximal degree in co-relation 189. Up to 8 conditions per place. [2023-08-27 05:17:34,515 INFO L119 LiptonReduction]: Number of co-enabled transitions 14276 [2023-08-27 05:17:37,507 INFO L134 LiptonReduction]: Checked pairs total: 30944 [2023-08-27 05:17:37,507 INFO L136 LiptonReduction]: Total number of compositions: 166 [2023-08-27 05:17:37,509 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:17:37,510 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;@e22e6eb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:17:37,510 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:17:37,528 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:17:37,528 INFO L124 PetriNetUnfolderBase]: 12/63 cut-off events. [2023-08-27 05:17:37,528 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 05:17:37,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:17:37,528 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-27 05:17:37,528 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:17:37,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:17:37,529 INFO L85 PathProgramCache]: Analyzing trace with hash -43146472, now seen corresponding path program 1 times [2023-08-27 05:17:37,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:17:37,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959243015] [2023-08-27 05:17:37,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:17:37,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:17:37,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:17:37,547 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:17:37,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:17:37,572 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:17:37,578 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:17:37,578 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:17:37,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-27 05:17:37,579 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 05:17:37,580 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:17:37,580 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:17:37,580 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-27 05:17:37,596 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-27 05:17:37,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 215 places, 235 transitions, 500 flow [2023-08-27 05:17:37,632 INFO L124 PetriNetUnfolderBase]: 54/476 cut-off events. [2023-08-27 05:17:37,632 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-27 05:17:37,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 504 conditions, 476 events. 54/476 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1745 event pairs, 1 based on Foata normal form. 0/382 useless extension candidates. Maximal degree in co-relation 319. Up to 16 conditions per place. [2023-08-27 05:17:37,634 INFO L82 GeneralOperation]: Start removeDead. Operand has 215 places, 235 transitions, 500 flow [2023-08-27 05:17:37,636 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 215 places, 235 transitions, 500 flow [2023-08-27 05:17:37,636 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:17:37,636 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 215 places, 235 transitions, 500 flow [2023-08-27 05:17:37,637 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 215 places, 235 transitions, 500 flow [2023-08-27 05:17:37,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 215 places, 235 transitions, 500 flow [2023-08-27 05:17:37,669 INFO L124 PetriNetUnfolderBase]: 54/476 cut-off events. [2023-08-27 05:17:37,669 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-27 05:17:37,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 504 conditions, 476 events. 54/476 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1745 event pairs, 1 based on Foata normal form. 0/382 useless extension candidates. Maximal degree in co-relation 319. Up to 16 conditions per place. [2023-08-27 05:17:37,682 INFO L119 LiptonReduction]: Number of co-enabled transitions 27348 [2023-08-27 05:17:40,510 INFO L134 LiptonReduction]: Checked pairs total: 63704 [2023-08-27 05:17:40,511 INFO L136 LiptonReduction]: Total number of compositions: 198 [2023-08-27 05:17:40,513 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:17:40,515 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;@e22e6eb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:17:40,516 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:17:40,558 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:17:40,558 INFO L124 PetriNetUnfolderBase]: 22/106 cut-off events. [2023-08-27 05:17:40,558 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-27 05:17:40,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:17:40,559 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-27 05:17:40,562 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:17:40,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:17:40,562 INFO L85 PathProgramCache]: Analyzing trace with hash -992493442, now seen corresponding path program 1 times [2023-08-27 05:17:40,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:17:40,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14005865] [2023-08-27 05:17:40,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:17:40,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:17:40,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:17:40,599 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:17:40,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:17:40,637 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:17:40,637 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:17:40,637 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:17:40,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-27 05:17:40,637 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 05:17:40,638 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:17:40,638 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:17:40,638 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-27 05:17:40,661 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-27 05:17:40,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 255 places, 280 transitions, 604 flow [2023-08-27 05:17:40,743 INFO L124 PetriNetUnfolderBase]: 86/725 cut-off events. [2023-08-27 05:17:40,744 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-27 05:17:40,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 780 conditions, 725 events. 86/725 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3017 event pairs, 6 based on Foata normal form. 0/580 useless extension candidates. Maximal degree in co-relation 496. Up to 32 conditions per place. [2023-08-27 05:17:40,750 INFO L82 GeneralOperation]: Start removeDead. Operand has 255 places, 280 transitions, 604 flow [2023-08-27 05:17:40,757 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 255 places, 280 transitions, 604 flow [2023-08-27 05:17:40,757 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:17:40,757 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 255 places, 280 transitions, 604 flow [2023-08-27 05:17:40,757 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 255 places, 280 transitions, 604 flow [2023-08-27 05:17:40,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 255 places, 280 transitions, 604 flow [2023-08-27 05:17:40,819 INFO L124 PetriNetUnfolderBase]: 86/725 cut-off events. [2023-08-27 05:17:40,819 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-27 05:17:40,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 780 conditions, 725 events. 86/725 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3017 event pairs, 6 based on Foata normal form. 0/580 useless extension candidates. Maximal degree in co-relation 496. Up to 32 conditions per place. [2023-08-27 05:17:40,836 INFO L119 LiptonReduction]: Number of co-enabled transitions 44376 [2023-08-27 05:17:43,764 INFO L134 LiptonReduction]: Checked pairs total: 109600 [2023-08-27 05:17:43,764 INFO L136 LiptonReduction]: Total number of compositions: 233 [2023-08-27 05:17:43,767 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:17:43,767 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;@e22e6eb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:17:43,768 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:17:43,777 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:17:43,777 INFO L124 PetriNetUnfolderBase]: 33/157 cut-off events. [2023-08-27 05:17:43,777 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-08-27 05:17:43,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:17:43,778 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-27 05:17:43,780 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:17:43,780 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:17:43,780 INFO L85 PathProgramCache]: Analyzing trace with hash 17602360, now seen corresponding path program 1 times [2023-08-27 05:17:43,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:17:43,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25768944] [2023-08-27 05:17:43,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:17:43,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:17:43,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:17:43,836 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:17:43,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:17:43,858 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:17:43,858 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:17:43,858 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:17:43,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-27 05:17:43,858 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 05:17:43,859 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:17:43,859 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:17:43,859 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-27 05:17:43,891 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-27 05:17:43,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 295 places, 325 transitions, 710 flow [2023-08-27 05:17:44,009 INFO L124 PetriNetUnfolderBase]: 146/1146 cut-off events. [2023-08-27 05:17:44,009 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-27 05:17:44,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1257 conditions, 1146 events. 146/1146 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 5554 event pairs, 23 based on Foata normal form. 0/918 useless extension candidates. Maximal degree in co-relation 770. Up to 80 conditions per place. [2023-08-27 05:17:44,022 INFO L82 GeneralOperation]: Start removeDead. Operand has 295 places, 325 transitions, 710 flow [2023-08-27 05:17:44,029 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 295 places, 325 transitions, 710 flow [2023-08-27 05:17:44,029 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:17:44,029 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 295 places, 325 transitions, 710 flow [2023-08-27 05:17:44,029 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 295 places, 325 transitions, 710 flow [2023-08-27 05:17:44,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 295 places, 325 transitions, 710 flow [2023-08-27 05:17:44,148 INFO L124 PetriNetUnfolderBase]: 146/1146 cut-off events. [2023-08-27 05:17:44,148 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-27 05:17:44,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1257 conditions, 1146 events. 146/1146 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 5554 event pairs, 23 based on Foata normal form. 0/918 useless extension candidates. Maximal degree in co-relation 770. Up to 80 conditions per place. [2023-08-27 05:17:44,188 INFO L119 LiptonReduction]: Number of co-enabled transitions 65360 [2023-08-27 05:17:48,205 INFO L134 LiptonReduction]: Checked pairs total: 168853 [2023-08-27 05:17:48,206 INFO L136 LiptonReduction]: Total number of compositions: 271 [2023-08-27 05:17:48,208 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:17:48,209 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;@e22e6eb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:17:48,209 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:17:48,221 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:17:48,221 INFO L124 PetriNetUnfolderBase]: 46/217 cut-off events. [2023-08-27 05:17:48,221 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-08-27 05:17:48,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:17:48,221 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 05:17:48,221 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:17:48,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:17:48,222 INFO L85 PathProgramCache]: Analyzing trace with hash -324913885, now seen corresponding path program 1 times [2023-08-27 05:17:48,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:17:48,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165879915] [2023-08-27 05:17:48,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:17:48,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:17:48,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:17:48,256 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:17:48,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:17:48,285 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:17:48,285 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:17:48,285 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:17:48,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-27 05:17:48,285 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 05:17:48,286 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:17:48,286 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:17:48,286 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-27 05:17:48,305 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2023-08-27 05:17:48,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 335 places, 370 transitions, 818 flow [2023-08-27 05:17:48,549 INFO L124 PetriNetUnfolderBase]: 270/1919 cut-off events. [2023-08-27 05:17:48,549 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-08-27 05:17:48,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2151 conditions, 1919 events. 270/1919 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 11279 event pairs, 72 based on Foata normal form. 0/1544 useless extension candidates. Maximal degree in co-relation 1245. Up to 192 conditions per place. [2023-08-27 05:17:48,578 INFO L82 GeneralOperation]: Start removeDead. Operand has 335 places, 370 transitions, 818 flow [2023-08-27 05:17:48,593 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 335 places, 370 transitions, 818 flow [2023-08-27 05:17:48,593 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:17:48,593 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 335 places, 370 transitions, 818 flow [2023-08-27 05:17:48,593 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 335 places, 370 transitions, 818 flow [2023-08-27 05:17:48,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 335 places, 370 transitions, 818 flow [2023-08-27 05:17:48,855 INFO L124 PetriNetUnfolderBase]: 270/1919 cut-off events. [2023-08-27 05:17:48,855 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-08-27 05:17:48,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2151 conditions, 1919 events. 270/1919 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 11279 event pairs, 72 based on Foata normal form. 0/1544 useless extension candidates. Maximal degree in co-relation 1245. Up to 192 conditions per place. [2023-08-27 05:17:48,943 INFO L119 LiptonReduction]: Number of co-enabled transitions 90300 [2023-08-27 05:17:52,478 INFO L134 LiptonReduction]: Checked pairs total: 239334 [2023-08-27 05:17:52,478 INFO L136 LiptonReduction]: Total number of compositions: 303 [2023-08-27 05:17:52,481 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:17:52,481 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;@e22e6eb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:17:52,481 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:17:52,497 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:17:52,497 INFO L124 PetriNetUnfolderBase]: 62/289 cut-off events. [2023-08-27 05:17:52,497 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2023-08-27 05:17:52,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:17:52,497 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 05:17:52,497 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:17:52,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:17:52,498 INFO L85 PathProgramCache]: Analyzing trace with hash -148499064, now seen corresponding path program 1 times [2023-08-27 05:17:52,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:17:52,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917165946] [2023-08-27 05:17:52,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:17:52,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:17:52,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:17:52,533 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:17:52,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:17:52,567 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:17:52,567 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:17:52,567 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:17:52,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-27 05:17:52,567 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 05:17:52,568 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:17:52,568 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:17:52,568 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-27 05:17:52,605 INFO L144 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2023-08-27 05:17:52,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 375 places, 415 transitions, 928 flow [2023-08-27 05:17:53,173 INFO L124 PetriNetUnfolderBase]: 538/3412 cut-off events. [2023-08-27 05:17:53,174 INFO L125 PetriNetUnfolderBase]: For 525/525 co-relation queries the response was YES. [2023-08-27 05:17:53,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3910 conditions, 3412 events. 538/3412 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 24239 event pairs, 201 based on Foata normal form. 0/2762 useless extension candidates. Maximal degree in co-relation 2137. Up to 448 conditions per place. [2023-08-27 05:17:53,238 INFO L82 GeneralOperation]: Start removeDead. Operand has 375 places, 415 transitions, 928 flow [2023-08-27 05:17:53,261 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 375 places, 415 transitions, 928 flow [2023-08-27 05:17:53,261 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:17:53,261 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 375 places, 415 transitions, 928 flow [2023-08-27 05:17:53,261 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 375 places, 415 transitions, 928 flow [2023-08-27 05:17:53,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 375 places, 415 transitions, 928 flow [2023-08-27 05:17:53,781 INFO L124 PetriNetUnfolderBase]: 538/3412 cut-off events. [2023-08-27 05:17:53,781 INFO L125 PetriNetUnfolderBase]: For 525/525 co-relation queries the response was YES. [2023-08-27 05:17:53,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3910 conditions, 3412 events. 538/3412 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 24239 event pairs, 201 based on Foata normal form. 0/2762 useless extension candidates. Maximal degree in co-relation 2137. Up to 448 conditions per place. [2023-08-27 05:17:53,973 INFO L119 LiptonReduction]: Number of co-enabled transitions 119196 [2023-08-27 05:17:58,021 INFO L134 LiptonReduction]: Checked pairs total: 319246 [2023-08-27 05:17:58,021 INFO L136 LiptonReduction]: Total number of compositions: 343 [2023-08-27 05:17:58,038 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:17:58,039 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;@e22e6eb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:17:58,039 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:17:58,088 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:17:58,088 INFO L124 PetriNetUnfolderBase]: 76/382 cut-off events. [2023-08-27 05:17:58,088 INFO L125 PetriNetUnfolderBase]: For 129/129 co-relation queries the response was YES. [2023-08-27 05:17:58,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:17:58,088 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 05:17:58,090 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:17:58,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:17:58,090 INFO L85 PathProgramCache]: Analyzing trace with hash -140386379, now seen corresponding path program 1 times [2023-08-27 05:17:58,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:17:58,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39426164] [2023-08-27 05:17:58,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:17:58,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:17:58,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:17:58,122 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:17:58,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:17:58,141 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:17:58,141 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:17:58,141 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:17:58,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-27 05:17:58,141 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 05:17:58,141 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:17:58,141 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:17:58,141 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-08-27 05:17:58,167 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-27 05:17:58,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 415 places, 460 transitions, 1040 flow [2023-08-27 05:17:59,508 INFO L124 PetriNetUnfolderBase]: 1126/6377 cut-off events. [2023-08-27 05:17:59,508 INFO L125 PetriNetUnfolderBase]: For 1136/1136 co-relation queries the response was YES. [2023-08-27 05:17:59,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7462 conditions, 6377 events. 1126/6377 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 53896 event pairs, 522 based on Foata normal form. 0/5196 useless extension candidates. Maximal degree in co-relation 3894. Up to 1024 conditions per place. [2023-08-27 05:17:59,608 INFO L82 GeneralOperation]: Start removeDead. Operand has 415 places, 460 transitions, 1040 flow [2023-08-27 05:17:59,650 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 415 places, 460 transitions, 1040 flow [2023-08-27 05:17:59,651 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:17:59,651 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 415 places, 460 transitions, 1040 flow [2023-08-27 05:17:59,651 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 415 places, 460 transitions, 1040 flow [2023-08-27 05:17:59,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 415 places, 460 transitions, 1040 flow [2023-08-27 05:18:00,881 INFO L124 PetriNetUnfolderBase]: 1126/6377 cut-off events. [2023-08-27 05:18:00,882 INFO L125 PetriNetUnfolderBase]: For 1136/1136 co-relation queries the response was YES. [2023-08-27 05:18:00,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7462 conditions, 6377 events. 1126/6377 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 53896 event pairs, 522 based on Foata normal form. 0/5196 useless extension candidates. Maximal degree in co-relation 3894. Up to 1024 conditions per place. [2023-08-27 05:18:01,294 INFO L119 LiptonReduction]: Number of co-enabled transitions 152048 [2023-08-27 05:18:06,755 INFO L134 LiptonReduction]: Checked pairs total: 422576 [2023-08-27 05:18:06,756 INFO L136 LiptonReduction]: Total number of compositions: 371 [2023-08-27 05:18:06,757 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:18:06,757 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;@e22e6eb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:18:06,757 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:18:06,788 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:18:06,788 INFO L124 PetriNetUnfolderBase]: 105/499 cut-off events. [2023-08-27 05:18:06,788 INFO L125 PetriNetUnfolderBase]: For 202/202 co-relation queries the response was YES. [2023-08-27 05:18:06,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:18:06,788 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 05:18:06,788 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:18:06,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:18:06,788 INFO L85 PathProgramCache]: Analyzing trace with hash 873689301, now seen corresponding path program 1 times [2023-08-27 05:18:06,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:18:06,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527776944] [2023-08-27 05:18:06,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:18:06,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:18:06,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:18:06,816 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:18:06,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:18:06,837 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:18:06,837 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:18:06,837 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:18:06,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-27 05:18:06,837 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 05:18:06,838 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:18:06,838 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:18:06,838 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-08-27 05:18:06,869 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-27 05:18:06,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 455 places, 505 transitions, 1154 flow [2023-08-27 05:18:09,486 INFO L124 PetriNetUnfolderBase]: 2418/12350 cut-off events. [2023-08-27 05:18:09,486 INFO L125 PetriNetUnfolderBase]: For 2460/2460 co-relation queries the response was YES. [2023-08-27 05:18:09,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14727 conditions, 12350 events. 2418/12350 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 121401 event pairs, 1291 based on Foata normal form. 0/10126 useless extension candidates. Maximal degree in co-relation 7444. Up to 2304 conditions per place. [2023-08-27 05:18:09,721 INFO L82 GeneralOperation]: Start removeDead. Operand has 455 places, 505 transitions, 1154 flow [2023-08-27 05:18:09,888 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 455 places, 505 transitions, 1154 flow [2023-08-27 05:18:09,888 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:18:09,888 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 455 places, 505 transitions, 1154 flow [2023-08-27 05:18:09,888 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 455 places, 505 transitions, 1154 flow [2023-08-27 05:18:09,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 455 places, 505 transitions, 1154 flow [2023-08-27 05:18:12,644 INFO L124 PetriNetUnfolderBase]: 2418/12350 cut-off events. [2023-08-27 05:18:12,644 INFO L125 PetriNetUnfolderBase]: For 2460/2460 co-relation queries the response was YES. [2023-08-27 05:18:12,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14727 conditions, 12350 events. 2418/12350 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 121401 event pairs, 1291 based on Foata normal form. 0/10126 useless extension candidates. Maximal degree in co-relation 7444. Up to 2304 conditions per place. [2023-08-27 05:18:13,425 INFO L119 LiptonReduction]: Number of co-enabled transitions 188856 [2023-08-27 05:18:18,621 INFO L134 LiptonReduction]: Checked pairs total: 460757 [2023-08-27 05:18:18,622 INFO L136 LiptonReduction]: Total number of compositions: 406 [2023-08-27 05:18:18,623 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:18:18,625 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;@e22e6eb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:18:18,625 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:18:18,675 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:18:18,675 INFO L124 PetriNetUnfolderBase]: 150/676 cut-off events. [2023-08-27 05:18:18,675 INFO L125 PetriNetUnfolderBase]: For 309/309 co-relation queries the response was YES. [2023-08-27 05:18:18,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:18:18,676 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 05:18:18,676 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:18:18,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:18:18,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1765738963, now seen corresponding path program 1 times [2023-08-27 05:18:18,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:18:18,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028513832] [2023-08-27 05:18:18,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:18:18,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:18:18,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:18:18,698 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:18:18,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:18:18,725 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:18:18,725 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:18:18,725 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:18:18,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-27 05:18:18,725 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 05:18:18,727 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:18:18,728 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:18:18,729 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-08-27 05:18:18,760 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2023-08-27 05:18:18,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 495 places, 550 transitions, 1270 flow [2023-08-27 05:18:24,366 INFO L124 PetriNetUnfolderBase]: 5246/24467 cut-off events. [2023-08-27 05:18:24,366 INFO L125 PetriNetUnfolderBase]: For 5330/5330 co-relation queries the response was YES. [2023-08-27 05:18:24,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29673 conditions, 24467 events. 5246/24467 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 273661 event pairs, 3084 based on Foata normal form. 0/20176 useless extension candidates. Maximal degree in co-relation 14707. Up to 5120 conditions per place. [2023-08-27 05:18:24,864 INFO L82 GeneralOperation]: Start removeDead. Operand has 495 places, 550 transitions, 1270 flow [2023-08-27 05:18:25,231 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 495 places, 550 transitions, 1270 flow [2023-08-27 05:18:25,232 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:18:25,232 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 495 places, 550 transitions, 1270 flow [2023-08-27 05:18:25,232 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 495 places, 550 transitions, 1270 flow [2023-08-27 05:18:25,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 495 places, 550 transitions, 1270 flow [2023-08-27 05:18:30,993 INFO L124 PetriNetUnfolderBase]: 5246/24467 cut-off events. [2023-08-27 05:18:30,993 INFO L125 PetriNetUnfolderBase]: For 5330/5330 co-relation queries the response was YES. [2023-08-27 05:18:31,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29673 conditions, 24467 events. 5246/24467 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 273661 event pairs, 3084 based on Foata normal form. 0/20176 useless extension candidates. Maximal degree in co-relation 14707. Up to 5120 conditions per place. [2023-08-27 05:18:32,858 INFO L119 LiptonReduction]: Number of co-enabled transitions 229620 [2023-08-27 05:18:37,979 INFO L134 LiptonReduction]: Checked pairs total: 570067 [2023-08-27 05:18:37,979 INFO L136 LiptonReduction]: Total number of compositions: 434 [2023-08-27 05:18:37,980 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:18:37,980 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;@e22e6eb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:18:37,980 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:18:38,044 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:18:38,044 INFO L124 PetriNetUnfolderBase]: 224/940 cut-off events. [2023-08-27 05:18:38,044 INFO L125 PetriNetUnfolderBase]: For 469/469 co-relation queries the response was YES. [2023-08-27 05:18:38,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:18:38,045 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 05:18:38,045 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:18:38,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:18:38,045 INFO L85 PathProgramCache]: Analyzing trace with hash 250219838, now seen corresponding path program 1 times [2023-08-27 05:18:38,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:18:38,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640577825] [2023-08-27 05:18:38,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:18:38,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:18:38,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:18:38,065 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:18:38,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:18:38,079 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:18:38,079 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:18:38,079 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:18:38,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-27 05:18:38,079 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 05:18:38,079 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:18:38,079 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:18:38,080 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-08-27 05:18:38,110 INFO L144 ThreadInstanceAdder]: Constructed 11 joinOtherThreadTransitions. [2023-08-27 05:18:38,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 535 places, 595 transitions, 1388 flow [2023-08-27 05:18:50,663 INFO L124 PetriNetUnfolderBase]: 11402/49128 cut-off events. [2023-08-27 05:18:50,664 INFO L125 PetriNetUnfolderBase]: For 11539/11539 co-relation queries the response was YES. [2023-08-27 05:18:52,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60492 conditions, 49128 events. 11402/49128 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 756. Compared 610804 event pairs, 7181 based on Foata normal form. 0/40722 useless extension candidates. Maximal degree in co-relation 29651. Up to 11264 conditions per place. [2023-08-27 05:18:52,020 INFO L82 GeneralOperation]: Start removeDead. Operand has 535 places, 595 transitions, 1388 flow [2023-08-27 05:18:52,708 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 535 places, 595 transitions, 1388 flow [2023-08-27 05:18:52,708 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:18:52,708 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 535 places, 595 transitions, 1388 flow [2023-08-27 05:18:52,708 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 535 places, 595 transitions, 1388 flow [2023-08-27 05:18:52,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 535 places, 595 transitions, 1388 flow [2023-08-27 05:19:05,574 INFO L124 PetriNetUnfolderBase]: 11402/49128 cut-off events. [2023-08-27 05:19:05,574 INFO L125 PetriNetUnfolderBase]: For 11539/11539 co-relation queries the response was YES. [2023-08-27 05:19:08,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60492 conditions, 49128 events. 11402/49128 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 756. Compared 610804 event pairs, 7181 based on Foata normal form. 0/40722 useless extension candidates. Maximal degree in co-relation 29651. Up to 11264 conditions per place. [2023-08-27 05:19:12,754 INFO L119 LiptonReduction]: Number of co-enabled transitions 274340 [2023-08-27 05:19:18,858 INFO L134 LiptonReduction]: Checked pairs total: 767865 [2023-08-27 05:19:18,858 INFO L136 LiptonReduction]: Total number of compositions: 484 [2023-08-27 05:19:18,866 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:19:18,867 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;@e22e6eb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:19:18,867 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:19:18,994 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:19:18,994 INFO L124 PetriNetUnfolderBase]: 349/1343 cut-off events. [2023-08-27 05:19:18,994 INFO L125 PetriNetUnfolderBase]: For 713/713 co-relation queries the response was YES. [2023-08-27 05:19:18,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:19:18,995 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 05:19:18,995 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:19:18,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:19:18,995 INFO L85 PathProgramCache]: Analyzing trace with hash 447548353, now seen corresponding path program 1 times [2023-08-27 05:19:18,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:19:18,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821032335] [2023-08-27 05:19:18,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:19:18,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:19:19,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:19:19,013 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:19:19,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:19:19,031 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:19:19,031 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:19:19,031 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:19:19,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-27 05:19:19,032 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 05:19:19,032 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:19:19,032 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:19:19,032 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-08-27 05:19:19,086 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2023-08-27 05:19:19,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 575 places, 640 transitions, 1508 flow [2023-08-27 05:19:49,013 INFO L124 PetriNetUnfolderBase]: 24726/99389 cut-off events. [2023-08-27 05:19:49,013 INFO L125 PetriNetUnfolderBase]: For 24928/24928 co-relation queries the response was YES. [2023-08-27 05:19:54,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124080 conditions, 99389 events. 24726/99389 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 1438. Compared 1354406 event pairs, 16398 based on Foata normal form. 0/82772 useless extension candidates. Maximal degree in co-relation 60468. Up to 24576 conditions per place. [2023-08-27 05:19:54,828 INFO L82 GeneralOperation]: Start removeDead. Operand has 575 places, 640 transitions, 1508 flow [2023-08-27 05:19:56,364 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 575 places, 640 transitions, 1508 flow [2023-08-27 05:19:56,364 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:19:56,364 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 575 places, 640 transitions, 1508 flow [2023-08-27 05:19:56,364 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 575 places, 640 transitions, 1508 flow [2023-08-27 05:19:56,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 575 places, 640 transitions, 1508 flow [2023-08-27 05:20:24,639 INFO L124 PetriNetUnfolderBase]: 24726/99389 cut-off events. [2023-08-27 05:20:24,639 INFO L125 PetriNetUnfolderBase]: For 24928/24928 co-relation queries the response was YES. [2023-08-27 05:20:30,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124080 conditions, 99389 events. 24726/99389 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 1438. Compared 1354406 event pairs, 16398 based on Foata normal form. 0/82772 useless extension candidates. Maximal degree in co-relation 60468. Up to 24576 conditions per place. [2023-08-27 05:20:37,309 INFO L119 LiptonReduction]: Number of co-enabled transitions 323016 [2023-08-27 05:20:42,637 INFO L134 LiptonReduction]: Checked pairs total: 910360 [2023-08-27 05:20:42,638 INFO L136 LiptonReduction]: Total number of compositions: 494 [2023-08-27 05:20:42,639 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:20:42,639 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;@e22e6eb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:20:42,639 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:20:42,804 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:20:42,804 INFO L124 PetriNetUnfolderBase]: 560/1966 cut-off events. [2023-08-27 05:20:42,804 INFO L125 PetriNetUnfolderBase]: For 1089/1089 co-relation queries the response was YES. [2023-08-27 05:20:42,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:20:42,804 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 05:20:42,804 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:20:42,805 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:20:42,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1929038897, now seen corresponding path program 1 times [2023-08-27 05:20:42,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:20:42,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265450507] [2023-08-27 05:20:42,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:20:42,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:20:42,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:20:42,822 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:20:42,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:20:42,841 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:20:42,841 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:20:42,841 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:20:42,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-27 05:20:42,841 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 05:20:42,841 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:20:42,842 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:20:42,842 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-08-27 05:20:42,872 INFO L144 ThreadInstanceAdder]: Constructed 13 joinOtherThreadTransitions. [2023-08-27 05:20:42,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 615 places, 685 transitions, 1630 flow [2023-08-27 05:21:47,703 INFO L124 PetriNetUnfolderBase]: 53410/201874 cut-off events. [2023-08-27 05:21:47,703 INFO L125 PetriNetUnfolderBase]: For 53690/53690 co-relation queries the response was YES. [2023-08-27 05:22:04,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255253 conditions, 201874 events. 53410/201874 cut-off events. For 53690/53690 co-relation queries the response was YES. Maximal size of possible extension queue 2834. Compared 3003533 event pairs, 36879 based on Foata normal form. 0/168854 useless extension candidates. Maximal degree in co-relation 124054. Up to 53248 conditions per place. [2023-08-27 05:22:04,255 INFO L82 GeneralOperation]: Start removeDead. Operand has 615 places, 685 transitions, 1630 flow [2023-08-27 05:22:10,165 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 615 places, 685 transitions, 1630 flow [2023-08-27 05:22:10,166 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:22:10,166 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 615 places, 685 transitions, 1630 flow [2023-08-27 05:22:10,166 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 615 places, 685 transitions, 1630 flow [2023-08-27 05:22:10,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 615 places, 685 transitions, 1630 flow