/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.data.races.in.concurrent.programs true -i ../../../trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-25 08:20:39,170 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-25 08:20:39,250 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-25 08:20:39,254 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-25 08:20:39,255 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-25 08:20:39,280 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-25 08:20:39,280 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-25 08:20:39,281 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-25 08:20:39,282 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-25 08:20:39,285 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-25 08:20:39,285 INFO L153 SettingsManager]: * Use SBE=true [2023-08-25 08:20:39,285 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-25 08:20:39,286 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-25 08:20:39,287 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-25 08:20:39,287 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-25 08:20:39,287 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-25 08:20:39,287 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-25 08:20:39,287 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-25 08:20:39,288 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-25 08:20:39,288 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-25 08:20:39,288 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-25 08:20:39,289 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-25 08:20:39,289 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-25 08:20:39,289 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-25 08:20:39,290 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-25 08:20:39,290 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-25 08:20:39,290 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-25 08:20:39,290 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-25 08:20:39,290 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-25 08:20:39,291 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-25 08:20:39,292 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-25 08:20:39,292 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-25 08:20:39,292 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-25 08:20:39,292 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-25 08:20:39,292 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-25 08:20:39,292 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of data races in concurrent programs -> true [2023-08-25 08:20:39,624 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-25 08:20:39,643 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-25 08:20:39,644 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-25 08:20:39,645 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-25 08:20:39,645 INFO L274 PluginConnector]: CDTParser initialized [2023-08-25 08:20:39,646 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs.i [2023-08-25 08:20:40,849 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-25 08:20:41,133 INFO L384 CDTParser]: Found 1 translation units. [2023-08-25 08:20:41,134 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/31_simple_loop5_vs.i [2023-08-25 08:20:41,157 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a21a5831/808ce92e3a8f43c482e1b1f147035fec/FLAG39f543d9b [2023-08-25 08:20:41,171 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a21a5831/808ce92e3a8f43c482e1b1f147035fec [2023-08-25 08:20:41,175 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-25 08:20:41,176 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-25 08:20:41,180 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-25 08:20:41,180 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-25 08:20:41,182 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-25 08:20:41,183 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 08:20:41" (1/1) ... [2023-08-25 08:20:41,184 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71b7e5ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:20:41, skipping insertion in model container [2023-08-25 08:20:41,184 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 08:20:41" (1/1) ... [2023-08-25 08:20:41,235 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-25 08:20:41,534 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-25 08:20:41,545 INFO L201 MainTranslator]: Completed pre-run [2023-08-25 08:20:41,575 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [253] [2023-08-25 08:20:41,576 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [253] [2023-08-25 08:20:41,598 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-25 08:20:41,633 INFO L206 MainTranslator]: Completed translation [2023-08-25 08:20:41,635 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:20:41 WrapperNode [2023-08-25 08:20:41,635 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-25 08:20:41,636 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-25 08:20:41,636 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-25 08:20:41,636 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-25 08:20:41,642 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:20:41" (1/1) ... [2023-08-25 08:20:41,654 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:20:41" (1/1) ... [2023-08-25 08:20:41,674 INFO L138 Inliner]: procedures = 170, calls = 19, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 138 [2023-08-25 08:20:41,674 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-25 08:20:41,675 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-25 08:20:41,675 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-25 08:20:41,675 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-25 08:20:41,682 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:20:41" (1/1) ... [2023-08-25 08:20:41,682 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:20:41" (1/1) ... [2023-08-25 08:20:41,684 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:20:41" (1/1) ... [2023-08-25 08:20:41,685 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:20:41" (1/1) ... [2023-08-25 08:20:41,690 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:20:41" (1/1) ... [2023-08-25 08:20:41,693 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:20:41" (1/1) ... [2023-08-25 08:20:41,694 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:20:41" (1/1) ... [2023-08-25 08:20:41,695 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:20:41" (1/1) ... [2023-08-25 08:20:41,698 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-25 08:20:41,698 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-25 08:20:41,698 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-25 08:20:41,699 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-25 08:20:41,699 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:20:41" (1/1) ... [2023-08-25 08:20:41,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-25 08:20:41,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-25 08:20:41,726 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-25 08:20:41,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-25 08:20:41,756 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2023-08-25 08:20:41,756 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2023-08-25 08:20:41,757 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-25 08:20:41,757 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-25 08:20:41,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-25 08:20:41,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-25 08:20:41,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-25 08:20:41,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-25 08:20:41,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-25 08:20:41,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-25 08:20:41,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-25 08:20:41,759 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-25 08:20:41,861 INFO L236 CfgBuilder]: Building ICFG [2023-08-25 08:20:41,863 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-25 08:20:42,083 INFO L277 CfgBuilder]: Performing block encoding [2023-08-25 08:20:42,189 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-25 08:20:42,189 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-25 08:20:42,192 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 08:20:42 BoogieIcfgContainer [2023-08-25 08:20:42,193 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-25 08:20:42,195 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-25 08:20:42,196 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-25 08:20:42,198 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-25 08:20:42,198 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.08 08:20:41" (1/3) ... [2023-08-25 08:20:42,199 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b1c8cb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 08:20:42, skipping insertion in model container [2023-08-25 08:20:42,199 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:20:41" (2/3) ... [2023-08-25 08:20:42,200 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b1c8cb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 08:20:42, skipping insertion in model container [2023-08-25 08:20:42,200 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 08:20:42" (3/3) ... [2023-08-25 08:20:42,201 INFO L112 eAbstractionObserver]: Analyzing ICFG 31_simple_loop5_vs.i [2023-08-25 08:20:42,216 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-25 08:20:42,216 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2023-08-25 08:20:42,217 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-25 08:20:42,275 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:20:42,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 111 transitions, 232 flow [2023-08-25 08:20:42,376 INFO L124 PetriNetUnfolderBase]: 8/120 cut-off events. [2023-08-25 08:20:42,377 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-25 08:20:42,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128 conditions, 120 events. 8/120 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 220 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 104. Up to 4 conditions per place. [2023-08-25 08:20:42,383 INFO L82 GeneralOperation]: Start removeDead. Operand has 110 places, 111 transitions, 232 flow [2023-08-25 08:20:42,388 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 110 transitions, 228 flow [2023-08-25 08:20:42,392 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:20:42,401 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 110 transitions, 228 flow [2023-08-25 08:20:42,403 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 110 transitions, 228 flow [2023-08-25 08:20:42,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 110 transitions, 228 flow [2023-08-25 08:20:42,433 INFO L124 PetriNetUnfolderBase]: 8/120 cut-off events. [2023-08-25 08:20:42,434 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-25 08:20:42,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128 conditions, 120 events. 8/120 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 220 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 104. Up to 4 conditions per place. [2023-08-25 08:20:42,440 INFO L119 LiptonReduction]: Number of co-enabled transitions 4704 [2023-08-25 08:20:44,059 INFO L134 LiptonReduction]: Checked pairs total: 13283 [2023-08-25 08:20:44,059 INFO L136 LiptonReduction]: Total number of compositions: 96 [2023-08-25 08:20:44,071 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:20:44,076 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:20:44,076 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:20:44,081 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:20:44,081 INFO L124 PetriNetUnfolderBase]: 0/24 cut-off events. [2023-08-25 08:20:44,081 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-25 08:20:44,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:20:44,082 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-25 08:20:44,082 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:20:44,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:20:44,086 INFO L85 PathProgramCache]: Analyzing trace with hash 859491808, now seen corresponding path program 1 times [2023-08-25 08:20:44,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:20:44,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230368447] [2023-08-25 08:20:44,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:20:44,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:20:44,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:20:44,205 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:20:44,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:20:44,261 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:20:44,262 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:20:44,263 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:20:44,265 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:20:44,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-25 08:20:44,266 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:20:44,271 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:20:44,272 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:20:44,272 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-25 08:20:44,318 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:20:44,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 185 places, 188 transitions, 400 flow [2023-08-25 08:20:44,372 INFO L124 PetriNetUnfolderBase]: 11/181 cut-off events. [2023-08-25 08:20:44,372 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-25 08:20:44,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 181 events. 11/181 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 412 event pairs, 0 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 190. Up to 6 conditions per place. [2023-08-25 08:20:44,378 INFO L82 GeneralOperation]: Start removeDead. Operand has 185 places, 188 transitions, 400 flow [2023-08-25 08:20:44,380 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 158 places, 159 transitions, 333 flow [2023-08-25 08:20:44,380 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:20:44,380 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 158 places, 159 transitions, 333 flow [2023-08-25 08:20:44,380 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 158 places, 159 transitions, 333 flow [2023-08-25 08:20:44,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 159 transitions, 333 flow [2023-08-25 08:20:44,437 INFO L124 PetriNetUnfolderBase]: 11/181 cut-off events. [2023-08-25 08:20:44,438 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-25 08:20:44,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194 conditions, 181 events. 11/181 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 411 event pairs, 0 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 169. Up to 6 conditions per place. [2023-08-25 08:20:44,446 INFO L119 LiptonReduction]: Number of co-enabled transitions 13302 [2023-08-25 08:20:45,700 INFO L134 LiptonReduction]: Checked pairs total: 69090 [2023-08-25 08:20:45,701 INFO L136 LiptonReduction]: Total number of compositions: 84 [2023-08-25 08:20:45,703 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:20:45,704 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:20:45,704 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:20:45,708 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:20:45,708 INFO L124 PetriNetUnfolderBase]: 2/52 cut-off events. [2023-08-25 08:20:45,708 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-25 08:20:45,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:20:45,709 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-25 08:20:45,709 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:20:45,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:20:45,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1613398804, now seen corresponding path program 1 times [2023-08-25 08:20:45,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:20:45,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10726157] [2023-08-25 08:20:45,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:20:45,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:20:45,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:20:45,729 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:20:45,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:20:45,749 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:20:45,749 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:20:45,749 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:20:45,750 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:20:45,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-25 08:20:45,750 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:20:45,750 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:20:45,750 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:20:45,751 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-25 08:20:45,792 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:20:45,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 260 places, 265 transitions, 572 flow [2023-08-25 08:20:45,822 INFO L124 PetriNetUnfolderBase]: 14/242 cut-off events. [2023-08-25 08:20:45,823 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-25 08:20:45,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 242 events. 14/242 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 681 event pairs, 0 based on Foata normal form. 0/181 useless extension candidates. Maximal degree in co-relation 256. Up to 8 conditions per place. [2023-08-25 08:20:45,825 INFO L82 GeneralOperation]: Start removeDead. Operand has 260 places, 265 transitions, 572 flow [2023-08-25 08:20:45,826 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 207 places, 208 transitions, 440 flow [2023-08-25 08:20:45,826 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:20:45,827 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 207 places, 208 transitions, 440 flow [2023-08-25 08:20:45,827 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 207 places, 208 transitions, 440 flow [2023-08-25 08:20:45,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 208 transitions, 440 flow [2023-08-25 08:20:45,853 INFO L124 PetriNetUnfolderBase]: 14/242 cut-off events. [2023-08-25 08:20:45,853 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-25 08:20:45,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 242 events. 14/242 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 687 event pairs, 0 based on Foata normal form. 0/181 useless extension candidates. Maximal degree in co-relation 235. Up to 8 conditions per place. [2023-08-25 08:20:45,867 INFO L119 LiptonReduction]: Number of co-enabled transitions 26604 [2023-08-25 08:20:47,152 INFO L134 LiptonReduction]: Checked pairs total: 129318 [2023-08-25 08:20:47,153 INFO L136 LiptonReduction]: Total number of compositions: 99 [2023-08-25 08:20:47,155 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:20:47,155 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:20:47,156 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:20:47,163 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:20:47,164 INFO L124 PetriNetUnfolderBase]: 2/77 cut-off events. [2023-08-25 08:20:47,164 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-25 08:20:47,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:20:47,164 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:20:47,164 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:20:47,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:20:47,165 INFO L85 PathProgramCache]: Analyzing trace with hash -457045989, now seen corresponding path program 1 times [2023-08-25 08:20:47,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:20:47,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622854630] [2023-08-25 08:20:47,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:20:47,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:20:47,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:20:47,187 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:20:47,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:20:47,226 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:20:47,226 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:20:47,226 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:20:47,227 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:20:47,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-25 08:20:47,227 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:20:47,227 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:20:47,228 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:20:47,228 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-25 08:20:47,271 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:20:47,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 335 places, 342 transitions, 748 flow [2023-08-25 08:20:47,323 INFO L124 PetriNetUnfolderBase]: 17/303 cut-off events. [2023-08-25 08:20:47,323 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-25 08:20:47,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332 conditions, 303 events. 17/303 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 982 event pairs, 0 based on Foata normal form. 0/226 useless extension candidates. Maximal degree in co-relation 323. Up to 10 conditions per place. [2023-08-25 08:20:47,326 INFO L82 GeneralOperation]: Start removeDead. Operand has 335 places, 342 transitions, 748 flow [2023-08-25 08:20:47,329 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 256 places, 257 transitions, 549 flow [2023-08-25 08:20:47,329 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:20:47,329 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 256 places, 257 transitions, 549 flow [2023-08-25 08:20:47,330 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 256 places, 257 transitions, 549 flow [2023-08-25 08:20:47,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 256 places, 257 transitions, 549 flow [2023-08-25 08:20:47,377 INFO L124 PetriNetUnfolderBase]: 17/303 cut-off events. [2023-08-25 08:20:47,377 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-25 08:20:47,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 329 conditions, 303 events. 17/303 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1000 event pairs, 0 based on Foata normal form. 0/226 useless extension candidates. Maximal degree in co-relation 302. Up to 10 conditions per place. [2023-08-25 08:20:47,396 INFO L119 LiptonReduction]: Number of co-enabled transitions 44610 [2023-08-25 08:20:48,792 INFO L134 LiptonReduction]: Checked pairs total: 232635 [2023-08-25 08:20:48,792 INFO L136 LiptonReduction]: Total number of compositions: 118 [2023-08-25 08:20:48,794 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:20:48,795 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:20:48,795 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:20:48,826 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:20:48,826 INFO L124 PetriNetUnfolderBase]: 2/106 cut-off events. [2023-08-25 08:20:48,827 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-25 08:20:48,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:20:48,827 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:20:48,827 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:20:48,827 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:20:48,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1506657520, now seen corresponding path program 1 times [2023-08-25 08:20:48,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:20:48,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448230163] [2023-08-25 08:20:48,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:20:48,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:20:48,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:20:48,877 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:20:48,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:20:48,894 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:20:48,894 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:20:48,894 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:20:48,894 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:20:48,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-25 08:20:48,894 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:20:48,895 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:20:48,895 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:20:48,895 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-25 08:20:48,934 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:20:48,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 410 places, 419 transitions, 928 flow [2023-08-25 08:20:48,991 INFO L124 PetriNetUnfolderBase]: 20/364 cut-off events. [2023-08-25 08:20:48,991 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-08-25 08:20:48,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 402 conditions, 364 events. 20/364 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1253 event pairs, 0 based on Foata normal form. 0/271 useless extension candidates. Maximal degree in co-relation 391. Up to 12 conditions per place. [2023-08-25 08:20:48,995 INFO L82 GeneralOperation]: Start removeDead. Operand has 410 places, 419 transitions, 928 flow [2023-08-25 08:20:48,998 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 305 places, 306 transitions, 660 flow [2023-08-25 08:20:48,998 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:20:48,998 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 305 places, 306 transitions, 660 flow [2023-08-25 08:20:48,999 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 305 places, 306 transitions, 660 flow [2023-08-25 08:20:48,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 305 places, 306 transitions, 660 flow [2023-08-25 08:20:49,051 INFO L124 PetriNetUnfolderBase]: 20/364 cut-off events. [2023-08-25 08:20:49,051 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-08-25 08:20:49,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 398 conditions, 364 events. 20/364 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1253 event pairs, 0 based on Foata normal form. 0/271 useless extension candidates. Maximal degree in co-relation 370. Up to 12 conditions per place. [2023-08-25 08:20:49,072 INFO L119 LiptonReduction]: Number of co-enabled transitions 67320 [2023-08-25 08:20:50,526 INFO L134 LiptonReduction]: Checked pairs total: 410759 [2023-08-25 08:20:50,527 INFO L136 LiptonReduction]: Total number of compositions: 139 [2023-08-25 08:20:50,528 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:20:50,528 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:20:50,529 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:20:50,543 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:20:50,543 INFO L124 PetriNetUnfolderBase]: 2/138 cut-off events. [2023-08-25 08:20:50,543 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-08-25 08:20:50,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:20:50,543 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:20:50,543 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:20:50,544 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:20:50,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1661092377, now seen corresponding path program 1 times [2023-08-25 08:20:50,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:20:50,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148619928] [2023-08-25 08:20:50,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:20:50,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:20:50,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:20:50,570 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:20:50,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:20:50,587 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:20:50,587 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:20:50,587 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:20:50,587 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:20:50,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-25 08:20:50,588 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:20:50,588 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:20:50,588 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:20:50,588 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-25 08:20:50,637 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:20:50,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 485 places, 496 transitions, 1112 flow [2023-08-25 08:20:50,713 INFO L124 PetriNetUnfolderBase]: 23/425 cut-off events. [2023-08-25 08:20:50,713 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-08-25 08:20:50,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 473 conditions, 425 events. 23/425 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1553 event pairs, 0 based on Foata normal form. 0/316 useless extension candidates. Maximal degree in co-relation 460. Up to 14 conditions per place. [2023-08-25 08:20:50,720 INFO L82 GeneralOperation]: Start removeDead. Operand has 485 places, 496 transitions, 1112 flow [2023-08-25 08:20:50,723 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 354 places, 355 transitions, 773 flow [2023-08-25 08:20:50,723 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:20:50,723 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 354 places, 355 transitions, 773 flow [2023-08-25 08:20:50,724 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 354 places, 355 transitions, 773 flow [2023-08-25 08:20:50,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 354 places, 355 transitions, 773 flow [2023-08-25 08:20:50,815 INFO L124 PetriNetUnfolderBase]: 23/425 cut-off events. [2023-08-25 08:20:50,815 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-08-25 08:20:50,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 468 conditions, 425 events. 23/425 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1549 event pairs, 0 based on Foata normal form. 0/316 useless extension candidates. Maximal degree in co-relation 439. Up to 14 conditions per place. [2023-08-25 08:20:50,843 INFO L119 LiptonReduction]: Number of co-enabled transitions 94734 [2023-08-25 08:20:52,384 INFO L134 LiptonReduction]: Checked pairs total: 586655 [2023-08-25 08:20:52,384 INFO L136 LiptonReduction]: Total number of compositions: 152 [2023-08-25 08:20:52,385 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:20:52,386 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:20:52,386 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:20:52,405 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:20:52,405 INFO L124 PetriNetUnfolderBase]: 3/180 cut-off events. [2023-08-25 08:20:52,405 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-08-25 08:20:52,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:20:52,405 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:20:52,405 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:20:52,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:20:52,406 INFO L85 PathProgramCache]: Analyzing trace with hash -725745282, now seen corresponding path program 1 times [2023-08-25 08:20:52,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:20:52,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313227356] [2023-08-25 08:20:52,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:20:52,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:20:52,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:20:52,442 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:20:52,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:20:52,461 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:20:52,461 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:20:52,461 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:20:52,461 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:20:52,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-25 08:20:52,462 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:20:52,462 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:20:52,462 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:20:52,462 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-25 08:20:52,512 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:20:52,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 560 places, 573 transitions, 1300 flow [2023-08-25 08:20:52,605 INFO L124 PetriNetUnfolderBase]: 26/486 cut-off events. [2023-08-25 08:20:52,606 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-08-25 08:20:52,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 545 conditions, 486 events. 26/486 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1858 event pairs, 0 based on Foata normal form. 0/361 useless extension candidates. Maximal degree in co-relation 530. Up to 16 conditions per place. [2023-08-25 08:20:52,614 INFO L82 GeneralOperation]: Start removeDead. Operand has 560 places, 573 transitions, 1300 flow [2023-08-25 08:20:52,618 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 403 places, 404 transitions, 888 flow [2023-08-25 08:20:52,618 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:20:52,619 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 403 places, 404 transitions, 888 flow [2023-08-25 08:20:52,619 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 403 places, 404 transitions, 888 flow [2023-08-25 08:20:52,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 403 places, 404 transitions, 888 flow [2023-08-25 08:20:52,748 INFO L124 PetriNetUnfolderBase]: 26/486 cut-off events. [2023-08-25 08:20:52,748 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-08-25 08:20:52,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 539 conditions, 486 events. 26/486 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1859 event pairs, 0 based on Foata normal form. 0/361 useless extension candidates. Maximal degree in co-relation 509. Up to 16 conditions per place. [2023-08-25 08:20:52,781 INFO L119 LiptonReduction]: Number of co-enabled transitions 126852 [2023-08-25 08:20:54,454 INFO L134 LiptonReduction]: Checked pairs total: 797439 [2023-08-25 08:20:54,455 INFO L136 LiptonReduction]: Total number of compositions: 177 [2023-08-25 08:20:54,456 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:20:54,458 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:20:54,458 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:20:54,485 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:20:54,485 INFO L124 PetriNetUnfolderBase]: 3/219 cut-off events. [2023-08-25 08:20:54,485 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-08-25 08:20:54,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:20:54,485 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:20:54,485 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:20:54,486 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:20:54,486 INFO L85 PathProgramCache]: Analyzing trace with hash 210508534, now seen corresponding path program 1 times [2023-08-25 08:20:54,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:20:54,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447622693] [2023-08-25 08:20:54,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:20:54,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:20:54,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:20:54,516 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:20:54,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:20:54,562 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:20:54,562 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:20:54,562 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:20:54,562 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:20:54,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-25 08:20:54,563 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:20:54,563 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:20:54,563 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:20:54,563 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-08-25 08:20:54,613 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:20:54,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 635 places, 650 transitions, 1492 flow [2023-08-25 08:20:54,730 INFO L124 PetriNetUnfolderBase]: 29/547 cut-off events. [2023-08-25 08:20:54,730 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2023-08-25 08:20:54,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 618 conditions, 547 events. 29/547 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2137 event pairs, 0 based on Foata normal form. 0/406 useless extension candidates. Maximal degree in co-relation 601. Up to 18 conditions per place. [2023-08-25 08:20:54,739 INFO L82 GeneralOperation]: Start removeDead. Operand has 635 places, 650 transitions, 1492 flow [2023-08-25 08:20:54,743 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 452 places, 453 transitions, 1005 flow [2023-08-25 08:20:54,743 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:20:54,743 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 452 places, 453 transitions, 1005 flow [2023-08-25 08:20:54,743 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 452 places, 453 transitions, 1005 flow [2023-08-25 08:20:54,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 452 places, 453 transitions, 1005 flow [2023-08-25 08:20:54,899 INFO L124 PetriNetUnfolderBase]: 29/547 cut-off events. [2023-08-25 08:20:54,899 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2023-08-25 08:20:54,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 611 conditions, 547 events. 29/547 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2140 event pairs, 0 based on Foata normal form. 0/406 useless extension candidates. Maximal degree in co-relation 580. Up to 18 conditions per place. [2023-08-25 08:20:54,939 INFO L119 LiptonReduction]: Number of co-enabled transitions 163674 [2023-08-25 08:20:56,707 INFO L134 LiptonReduction]: Checked pairs total: 1040953 [2023-08-25 08:20:56,707 INFO L136 LiptonReduction]: Total number of compositions: 190 [2023-08-25 08:20:56,708 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:20:56,709 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:20:56,709 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:20:56,742 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:20:56,742 INFO L124 PetriNetUnfolderBase]: 5/259 cut-off events. [2023-08-25 08:20:56,742 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2023-08-25 08:20:56,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:20:56,743 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:20:56,743 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:20:56,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:20:56,743 INFO L85 PathProgramCache]: Analyzing trace with hash 321021978, now seen corresponding path program 1 times [2023-08-25 08:20:56,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:20:56,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975667168] [2023-08-25 08:20:56,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:20:56,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:20:56,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:20:56,761 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:20:56,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:20:56,785 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:20:56,785 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:20:56,785 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:20:56,785 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:20:56,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-25 08:20:56,786 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:20:56,786 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:20:56,786 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:20:56,786 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-08-25 08:20:56,851 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:20:56,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 710 places, 727 transitions, 1688 flow [2023-08-25 08:20:56,985 INFO L124 PetriNetUnfolderBase]: 32/608 cut-off events. [2023-08-25 08:20:56,985 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2023-08-25 08:20:56,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 692 conditions, 608 events. 32/608 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2453 event pairs, 0 based on Foata normal form. 0/451 useless extension candidates. Maximal degree in co-relation 673. Up to 20 conditions per place. [2023-08-25 08:20:57,000 INFO L82 GeneralOperation]: Start removeDead. Operand has 710 places, 727 transitions, 1688 flow [2023-08-25 08:20:57,005 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 501 places, 502 transitions, 1124 flow [2023-08-25 08:20:57,005 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:20:57,005 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 501 places, 502 transitions, 1124 flow [2023-08-25 08:20:57,005 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 501 places, 502 transitions, 1124 flow [2023-08-25 08:20:57,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 501 places, 502 transitions, 1124 flow [2023-08-25 08:20:57,137 INFO L124 PetriNetUnfolderBase]: 32/608 cut-off events. [2023-08-25 08:20:57,137 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2023-08-25 08:20:57,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 684 conditions, 608 events. 32/608 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2448 event pairs, 0 based on Foata normal form. 0/451 useless extension candidates. Maximal degree in co-relation 652. Up to 20 conditions per place. [2023-08-25 08:20:57,198 INFO L119 LiptonReduction]: Number of co-enabled transitions 205200 [2023-08-25 08:20:59,054 INFO L134 LiptonReduction]: Checked pairs total: 1311239 [2023-08-25 08:20:59,054 INFO L136 LiptonReduction]: Total number of compositions: 209 [2023-08-25 08:20:59,055 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:20:59,056 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:20:59,056 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:20:59,100 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:20:59,101 INFO L124 PetriNetUnfolderBase]: 5/302 cut-off events. [2023-08-25 08:20:59,101 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2023-08-25 08:20:59,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:20:59,101 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:20:59,101 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:20:59,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:20:59,101 INFO L85 PathProgramCache]: Analyzing trace with hash -729394397, now seen corresponding path program 1 times [2023-08-25 08:20:59,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:20:59,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791160667] [2023-08-25 08:20:59,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:20:59,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:20:59,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:20:59,137 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:20:59,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:20:59,159 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:20:59,160 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:20:59,161 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:20:59,161 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:20:59,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-25 08:20:59,163 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:20:59,163 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:20:59,163 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:20:59,163 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-08-25 08:20:59,239 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:20:59,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 785 places, 804 transitions, 1888 flow [2023-08-25 08:20:59,422 INFO L124 PetriNetUnfolderBase]: 35/669 cut-off events. [2023-08-25 08:20:59,422 INFO L125 PetriNetUnfolderBase]: For 210/210 co-relation queries the response was YES. [2023-08-25 08:20:59,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 767 conditions, 669 events. 35/669 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2751 event pairs, 0 based on Foata normal form. 0/496 useless extension candidates. Maximal degree in co-relation 746. Up to 22 conditions per place. [2023-08-25 08:20:59,434 INFO L82 GeneralOperation]: Start removeDead. Operand has 785 places, 804 transitions, 1888 flow [2023-08-25 08:20:59,440 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 550 places, 551 transitions, 1245 flow [2023-08-25 08:20:59,440 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:20:59,440 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 550 places, 551 transitions, 1245 flow [2023-08-25 08:20:59,441 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 550 places, 551 transitions, 1245 flow [2023-08-25 08:20:59,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 550 places, 551 transitions, 1245 flow [2023-08-25 08:20:59,568 INFO L124 PetriNetUnfolderBase]: 35/669 cut-off events. [2023-08-25 08:20:59,569 INFO L125 PetriNetUnfolderBase]: For 210/210 co-relation queries the response was YES. [2023-08-25 08:20:59,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 758 conditions, 669 events. 35/669 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2740 event pairs, 0 based on Foata normal form. 0/496 useless extension candidates. Maximal degree in co-relation 725. Up to 22 conditions per place. [2023-08-25 08:20:59,623 INFO L119 LiptonReduction]: Number of co-enabled transitions 251430 [2023-08-25 08:21:01,648 INFO L134 LiptonReduction]: Checked pairs total: 1607235 [2023-08-25 08:21:01,649 INFO L136 LiptonReduction]: Total number of compositions: 230 [2023-08-25 08:21:01,650 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:21:01,650 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:21:01,651 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:21:01,690 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:21:01,691 INFO L124 PetriNetUnfolderBase]: 7/345 cut-off events. [2023-08-25 08:21:01,691 INFO L125 PetriNetUnfolderBase]: For 210/210 co-relation queries the response was YES. [2023-08-25 08:21:01,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:21:01,691 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:21:01,691 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:21:01,691 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:21:01,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1824828291, now seen corresponding path program 1 times [2023-08-25 08:21:01,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:21:01,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377814086] [2023-08-25 08:21:01,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:21:01,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:21:01,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:21:01,713 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:21:01,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:21:01,730 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:21:01,730 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:21:01,731 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:21:01,731 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:21:01,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-25 08:21:01,731 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:21:01,731 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:21:01,732 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:21:01,732 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-08-25 08:21:01,799 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:21:01,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 860 places, 881 transitions, 2092 flow [2023-08-25 08:21:01,982 INFO L124 PetriNetUnfolderBase]: 38/730 cut-off events. [2023-08-25 08:21:01,982 INFO L125 PetriNetUnfolderBase]: For 275/275 co-relation queries the response was YES. [2023-08-25 08:21:02,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 843 conditions, 730 events. 38/730 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 3106 event pairs, 0 based on Foata normal form. 0/541 useless extension candidates. Maximal degree in co-relation 820. Up to 24 conditions per place. [2023-08-25 08:21:02,004 INFO L82 GeneralOperation]: Start removeDead. Operand has 860 places, 881 transitions, 2092 flow [2023-08-25 08:21:02,010 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 599 places, 600 transitions, 1368 flow [2023-08-25 08:21:02,010 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:21:02,010 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 599 places, 600 transitions, 1368 flow [2023-08-25 08:21:02,010 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 599 places, 600 transitions, 1368 flow [2023-08-25 08:21:02,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 599 places, 600 transitions, 1368 flow [2023-08-25 08:21:02,186 INFO L124 PetriNetUnfolderBase]: 38/730 cut-off events. [2023-08-25 08:21:02,186 INFO L125 PetriNetUnfolderBase]: For 275/275 co-relation queries the response was YES. [2023-08-25 08:21:02,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 833 conditions, 730 events. 38/730 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 3125 event pairs, 0 based on Foata normal form. 0/541 useless extension candidates. Maximal degree in co-relation 799. Up to 24 conditions per place. [2023-08-25 08:21:02,310 INFO L119 LiptonReduction]: Number of co-enabled transitions 302364 [2023-08-25 08:21:04,394 INFO L134 LiptonReduction]: Checked pairs total: 1968335 [2023-08-25 08:21:04,394 INFO L136 LiptonReduction]: Total number of compositions: 247 [2023-08-25 08:21:04,396 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:21:04,396 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:21:04,396 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:21:04,456 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:21:04,456 INFO L124 PetriNetUnfolderBase]: 8/385 cut-off events. [2023-08-25 08:21:04,456 INFO L125 PetriNetUnfolderBase]: For 275/275 co-relation queries the response was YES. [2023-08-25 08:21:04,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:21:04,456 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:21:04,456 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:21:04,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:21:04,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1445715709, now seen corresponding path program 1 times [2023-08-25 08:21:04,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:21:04,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450591117] [2023-08-25 08:21:04,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:21:04,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:21:04,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:21:04,477 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:21:04,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:21:04,496 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:21:04,496 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:21:04,496 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:21:04,496 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:21:04,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-25 08:21:04,497 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:21:04,497 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:21:04,497 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:21:04,497 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-08-25 08:21:04,571 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:21:04,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 935 places, 958 transitions, 2300 flow [2023-08-25 08:21:04,885 INFO L124 PetriNetUnfolderBase]: 41/791 cut-off events. [2023-08-25 08:21:04,885 INFO L125 PetriNetUnfolderBase]: For 352/352 co-relation queries the response was YES. [2023-08-25 08:21:04,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 920 conditions, 791 events. 41/791 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 3387 event pairs, 0 based on Foata normal form. 0/586 useless extension candidates. Maximal degree in co-relation 895. Up to 26 conditions per place. [2023-08-25 08:21:04,903 INFO L82 GeneralOperation]: Start removeDead. Operand has 935 places, 958 transitions, 2300 flow [2023-08-25 08:21:04,909 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 648 places, 649 transitions, 1493 flow [2023-08-25 08:21:04,909 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:21:04,909 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 648 places, 649 transitions, 1493 flow [2023-08-25 08:21:04,909 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 648 places, 649 transitions, 1493 flow [2023-08-25 08:21:04,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 648 places, 649 transitions, 1493 flow [2023-08-25 08:21:05,079 INFO L124 PetriNetUnfolderBase]: 41/791 cut-off events. [2023-08-25 08:21:05,079 INFO L125 PetriNetUnfolderBase]: For 352/352 co-relation queries the response was YES. [2023-08-25 08:21:05,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 909 conditions, 791 events. 41/791 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 3385 event pairs, 0 based on Foata normal form. 0/586 useless extension candidates. Maximal degree in co-relation 874. Up to 26 conditions per place. [2023-08-25 08:21:05,157 INFO L119 LiptonReduction]: Number of co-enabled transitions 358002 [2023-08-25 08:21:07,276 INFO L134 LiptonReduction]: Checked pairs total: 1992593 [2023-08-25 08:21:07,277 INFO L136 LiptonReduction]: Total number of compositions: 258 [2023-08-25 08:21:07,278 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:21:07,278 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:21:07,278 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:21:07,342 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:21:07,342 INFO L124 PetriNetUnfolderBase]: 9/423 cut-off events. [2023-08-25 08:21:07,342 INFO L125 PetriNetUnfolderBase]: For 352/352 co-relation queries the response was YES. [2023-08-25 08:21:07,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:21:07,342 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:21:07,342 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:21:07,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:21:07,343 INFO L85 PathProgramCache]: Analyzing trace with hash -951750728, now seen corresponding path program 1 times [2023-08-25 08:21:07,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:21:07,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094117991] [2023-08-25 08:21:07,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:21:07,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:21:07,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:21:07,366 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:21:07,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:21:07,393 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:21:07,393 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:21:07,393 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:21:07,394 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:21:07,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-25 08:21:07,394 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:21:07,396 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:21:07,397 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:21:07,397 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-08-25 08:21:07,470 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:21:07,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1010 places, 1035 transitions, 2512 flow [2023-08-25 08:21:07,742 INFO L124 PetriNetUnfolderBase]: 44/852 cut-off events. [2023-08-25 08:21:07,743 INFO L125 PetriNetUnfolderBase]: For 442/442 co-relation queries the response was YES. [2023-08-25 08:21:07,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 998 conditions, 852 events. 44/852 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 3720 event pairs, 0 based on Foata normal form. 0/631 useless extension candidates. Maximal degree in co-relation 971. Up to 28 conditions per place. [2023-08-25 08:21:07,766 INFO L82 GeneralOperation]: Start removeDead. Operand has 1010 places, 1035 transitions, 2512 flow [2023-08-25 08:21:07,773 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 697 places, 698 transitions, 1620 flow [2023-08-25 08:21:07,773 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:21:07,774 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 697 places, 698 transitions, 1620 flow [2023-08-25 08:21:07,774 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 697 places, 698 transitions, 1620 flow [2023-08-25 08:21:07,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 697 places, 698 transitions, 1620 flow [2023-08-25 08:21:08,033 INFO L124 PetriNetUnfolderBase]: 44/852 cut-off events. [2023-08-25 08:21:08,033 INFO L125 PetriNetUnfolderBase]: For 442/442 co-relation queries the response was YES. [2023-08-25 08:21:08,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 986 conditions, 852 events. 44/852 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 3680 event pairs, 0 based on Foata normal form. 0/631 useless extension candidates. Maximal degree in co-relation 950. Up to 28 conditions per place. [2023-08-25 08:21:08,240 INFO L119 LiptonReduction]: Number of co-enabled transitions 418344 [2023-08-25 08:21:10,505 INFO L134 LiptonReduction]: Checked pairs total: 2751828 [2023-08-25 08:21:10,505 INFO L136 LiptonReduction]: Total number of compositions: 279 [2023-08-25 08:21:10,506 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:21:10,506 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:21:10,507 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:21:10,602 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:21:10,602 INFO L124 PetriNetUnfolderBase]: 10/466 cut-off events. [2023-08-25 08:21:10,602 INFO L125 PetriNetUnfolderBase]: For 442/442 co-relation queries the response was YES. [2023-08-25 08:21:10,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:21:10,602 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:21:10,603 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:21:10,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:21:10,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1126331993, now seen corresponding path program 1 times [2023-08-25 08:21:10,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:21:10,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044927339] [2023-08-25 08:21:10,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:21:10,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:21:10,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:21:10,636 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:21:10,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:21:10,673 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:21:10,674 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:21:10,674 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:21:10,674 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:21:10,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-25 08:21:10,674 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:21:10,675 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:21:10,675 WARN L233 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:21:10,676 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2023-08-25 08:21:10,764 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:21:10,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1085 places, 1112 transitions, 2728 flow [2023-08-25 08:21:11,096 INFO L124 PetriNetUnfolderBase]: 47/913 cut-off events. [2023-08-25 08:21:11,096 INFO L125 PetriNetUnfolderBase]: For 546/546 co-relation queries the response was YES. [2023-08-25 08:21:11,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1077 conditions, 913 events. 47/913 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 4013 event pairs, 0 based on Foata normal form. 0/676 useless extension candidates. Maximal degree in co-relation 1048. Up to 30 conditions per place. [2023-08-25 08:21:11,120 INFO L82 GeneralOperation]: Start removeDead. Operand has 1085 places, 1112 transitions, 2728 flow [2023-08-25 08:21:11,128 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 746 places, 747 transitions, 1749 flow [2023-08-25 08:21:11,129 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:21:11,129 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 746 places, 747 transitions, 1749 flow [2023-08-25 08:21:11,129 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 746 places, 747 transitions, 1749 flow [2023-08-25 08:21:11,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 746 places, 747 transitions, 1749 flow [2023-08-25 08:21:11,379 INFO L124 PetriNetUnfolderBase]: 47/913 cut-off events. [2023-08-25 08:21:11,379 INFO L125 PetriNetUnfolderBase]: For 546/546 co-relation queries the response was YES. [2023-08-25 08:21:11,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1064 conditions, 913 events. 47/913 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 4042 event pairs, 0 based on Foata normal form. 0/676 useless extension candidates. Maximal degree in co-relation 1027. Up to 30 conditions per place. [2023-08-25 08:21:11,486 INFO L119 LiptonReduction]: Number of co-enabled transitions 483390 [2023-08-25 08:21:13,870 INFO L134 LiptonReduction]: Checked pairs total: 3189619 [2023-08-25 08:21:13,870 INFO L136 LiptonReduction]: Total number of compositions: 296 [2023-08-25 08:21:13,871 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:21:13,872 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:21:13,872 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:21:13,953 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:21:13,953 INFO L124 PetriNetUnfolderBase]: 10/506 cut-off events. [2023-08-25 08:21:13,953 INFO L125 PetriNetUnfolderBase]: For 546/546 co-relation queries the response was YES. [2023-08-25 08:21:13,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:21:13,953 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:21:13,953 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:21:13,953 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:21:13,953 INFO L85 PathProgramCache]: Analyzing trace with hash 894004353, now seen corresponding path program 1 times [2023-08-25 08:21:13,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:21:13,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030928278] [2023-08-25 08:21:13,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:21:13,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:21:13,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:21:13,980 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:21:13,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:21:14,010 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:21:14,010 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:21:14,011 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:21:14,011 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:21:14,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-25 08:21:14,011 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:21:14,011 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:21:14,012 WARN L233 ceAbstractionStarter]: 14 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:21:14,012 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 15 thread instances. [2023-08-25 08:21:14,095 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:21:14,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1160 places, 1189 transitions, 2948 flow [2023-08-25 08:21:14,397 INFO L124 PetriNetUnfolderBase]: 50/974 cut-off events. [2023-08-25 08:21:14,397 INFO L125 PetriNetUnfolderBase]: For 665/665 co-relation queries the response was YES. [2023-08-25 08:21:14,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1157 conditions, 974 events. 50/974 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 4326 event pairs, 0 based on Foata normal form. 0/721 useless extension candidates. Maximal degree in co-relation 1126. Up to 32 conditions per place. [2023-08-25 08:21:14,423 INFO L82 GeneralOperation]: Start removeDead. Operand has 1160 places, 1189 transitions, 2948 flow [2023-08-25 08:21:14,430 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 795 places, 796 transitions, 1880 flow [2023-08-25 08:21:14,430 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:21:14,430 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 795 places, 796 transitions, 1880 flow [2023-08-25 08:21:14,430 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 795 places, 796 transitions, 1880 flow [2023-08-25 08:21:14,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 795 places, 796 transitions, 1880 flow [2023-08-25 08:21:14,693 INFO L124 PetriNetUnfolderBase]: 50/974 cut-off events. [2023-08-25 08:21:14,693 INFO L125 PetriNetUnfolderBase]: For 665/665 co-relation queries the response was YES. [2023-08-25 08:21:14,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1143 conditions, 974 events. 50/974 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 4329 event pairs, 0 based on Foata normal form. 0/721 useless extension candidates. Maximal degree in co-relation 1105. Up to 32 conditions per place. [2023-08-25 08:21:14,798 INFO L119 LiptonReduction]: Number of co-enabled transitions 553140 [2023-08-25 08:21:17,451 INFO L134 LiptonReduction]: Checked pairs total: 3114455 [2023-08-25 08:21:17,451 INFO L136 LiptonReduction]: Total number of compositions: 321 [2023-08-25 08:21:17,453 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:21:17,453 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:21:17,453 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:21:17,604 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:21:17,605 INFO L124 PetriNetUnfolderBase]: 12/546 cut-off events. [2023-08-25 08:21:17,605 INFO L125 PetriNetUnfolderBase]: For 665/665 co-relation queries the response was YES. [2023-08-25 08:21:17,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:21:17,605 INFO L208 CegarLoopForPetriNet]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:21:17,605 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:21:17,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:21:17,605 INFO L85 PathProgramCache]: Analyzing trace with hash 962025716, now seen corresponding path program 1 times [2023-08-25 08:21:17,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:21:17,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015394887] [2023-08-25 08:21:17,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:21:17,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:21:17,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:21:17,645 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:21:17,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:21:17,675 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:21:17,675 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:21:17,677 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:21:17,677 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:21:17,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-25 08:21:17,677 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:21:17,678 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:21:17,678 WARN L233 ceAbstractionStarter]: 15 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:21:17,678 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 16 thread instances. [2023-08-25 08:21:17,770 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:21:17,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1235 places, 1266 transitions, 3172 flow [2023-08-25 08:21:18,069 INFO L124 PetriNetUnfolderBase]: 53/1035 cut-off events. [2023-08-25 08:21:18,069 INFO L125 PetriNetUnfolderBase]: For 800/800 co-relation queries the response was YES. [2023-08-25 08:21:18,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1238 conditions, 1035 events. 53/1035 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 4589 event pairs, 0 based on Foata normal form. 0/766 useless extension candidates. Maximal degree in co-relation 1205. Up to 34 conditions per place. [2023-08-25 08:21:18,101 INFO L82 GeneralOperation]: Start removeDead. Operand has 1235 places, 1266 transitions, 3172 flow [2023-08-25 08:21:18,109 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 844 places, 845 transitions, 2013 flow [2023-08-25 08:21:18,109 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:21:18,109 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 844 places, 845 transitions, 2013 flow [2023-08-25 08:21:18,109 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 844 places, 845 transitions, 2013 flow [2023-08-25 08:21:18,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 844 places, 845 transitions, 2013 flow [2023-08-25 08:21:18,392 INFO L124 PetriNetUnfolderBase]: 53/1035 cut-off events. [2023-08-25 08:21:18,392 INFO L125 PetriNetUnfolderBase]: For 800/800 co-relation queries the response was YES. [2023-08-25 08:21:18,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1223 conditions, 1035 events. 53/1035 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 4594 event pairs, 0 based on Foata normal form. 0/766 useless extension candidates. Maximal degree in co-relation 1184. Up to 34 conditions per place. [2023-08-25 08:21:18,595 INFO L119 LiptonReduction]: Number of co-enabled transitions 627594 [2023-08-25 08:21:21,338 INFO L134 LiptonReduction]: Checked pairs total: 3594576 [2023-08-25 08:21:21,338 INFO L136 LiptonReduction]: Total number of compositions: 332 [2023-08-25 08:21:21,340 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:21:21,340 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:21:21,340 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:21:21,452 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:21:21,452 INFO L124 PetriNetUnfolderBase]: 13/588 cut-off events. [2023-08-25 08:21:21,452 INFO L125 PetriNetUnfolderBase]: For 800/800 co-relation queries the response was YES. [2023-08-25 08:21:21,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:21:21,452 INFO L208 CegarLoopForPetriNet]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:21:21,453 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:21:21,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:21:21,453 INFO L85 PathProgramCache]: Analyzing trace with hash -460620617, now seen corresponding path program 1 times [2023-08-25 08:21:21,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:21:21,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120904516] [2023-08-25 08:21:21,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:21:21,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:21:21,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:21:21,476 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:21:21,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:21:21,514 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:21:21,515 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:21:21,515 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:21:21,515 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:21:21,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-25 08:21:21,515 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:21:21,515 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:21:21,516 WARN L233 ceAbstractionStarter]: 16 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:21:21,516 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 17 thread instances. [2023-08-25 08:21:21,609 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:21:21,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1310 places, 1343 transitions, 3400 flow [2023-08-25 08:21:21,990 INFO L124 PetriNetUnfolderBase]: 56/1096 cut-off events. [2023-08-25 08:21:21,990 INFO L125 PetriNetUnfolderBase]: For 952/952 co-relation queries the response was YES. [2023-08-25 08:21:22,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1320 conditions, 1096 events. 56/1096 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 4892 event pairs, 0 based on Foata normal form. 0/811 useless extension candidates. Maximal degree in co-relation 1285. Up to 36 conditions per place. [2023-08-25 08:21:22,025 INFO L82 GeneralOperation]: Start removeDead. Operand has 1310 places, 1343 transitions, 3400 flow [2023-08-25 08:21:22,033 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 893 places, 894 transitions, 2148 flow [2023-08-25 08:21:22,033 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:21:22,033 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 893 places, 894 transitions, 2148 flow [2023-08-25 08:21:22,033 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 893 places, 894 transitions, 2148 flow [2023-08-25 08:21:22,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 893 places, 894 transitions, 2148 flow [2023-08-25 08:21:22,367 INFO L124 PetriNetUnfolderBase]: 56/1096 cut-off events. [2023-08-25 08:21:22,367 INFO L125 PetriNetUnfolderBase]: For 952/952 co-relation queries the response was YES. [2023-08-25 08:21:22,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1304 conditions, 1096 events. 56/1096 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 4887 event pairs, 0 based on Foata normal form. 0/811 useless extension candidates. Maximal degree in co-relation 1264. Up to 36 conditions per place. [2023-08-25 08:21:22,538 INFO L119 LiptonReduction]: Number of co-enabled transitions 706752 [2023-08-25 08:21:25,369 INFO L134 LiptonReduction]: Checked pairs total: 3988860 [2023-08-25 08:21:25,370 INFO L136 LiptonReduction]: Total number of compositions: 351 [2023-08-25 08:21:25,371 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:21:25,371 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:21:25,371 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:21:25,528 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:21:25,528 INFO L124 PetriNetUnfolderBase]: 14/629 cut-off events. [2023-08-25 08:21:25,529 INFO L125 PetriNetUnfolderBase]: For 952/952 co-relation queries the response was YES. [2023-08-25 08:21:25,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:21:25,529 INFO L208 CegarLoopForPetriNet]: trace histogram [18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:21:25,529 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:21:25,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:21:25,529 INFO L85 PathProgramCache]: Analyzing trace with hash 2024770557, now seen corresponding path program 1 times [2023-08-25 08:21:25,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:21:25,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321903634] [2023-08-25 08:21:25,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:21:25,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:21:25,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:21:25,554 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:21:25,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:21:25,596 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:21:25,596 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:21:25,597 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:21:25,597 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:21:25,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-25 08:21:25,597 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:21:25,598 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:21:25,598 WARN L233 ceAbstractionStarter]: 17 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:21:25,598 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 18 thread instances. [2023-08-25 08:21:25,697 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:21:25,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1385 places, 1420 transitions, 3632 flow [2023-08-25 08:21:26,172 INFO L124 PetriNetUnfolderBase]: 59/1157 cut-off events. [2023-08-25 08:21:26,172 INFO L125 PetriNetUnfolderBase]: For 1122/1122 co-relation queries the response was YES. [2023-08-25 08:21:26,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1403 conditions, 1157 events. 59/1157 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 5220 event pairs, 0 based on Foata normal form. 0/856 useless extension candidates. Maximal degree in co-relation 1366. Up to 38 conditions per place. [2023-08-25 08:21:26,200 INFO L82 GeneralOperation]: Start removeDead. Operand has 1385 places, 1420 transitions, 3632 flow [2023-08-25 08:21:26,206 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 942 places, 943 transitions, 2285 flow [2023-08-25 08:21:26,206 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:21:26,206 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 942 places, 943 transitions, 2285 flow [2023-08-25 08:21:26,207 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 942 places, 943 transitions, 2285 flow [2023-08-25 08:21:26,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 942 places, 943 transitions, 2285 flow [2023-08-25 08:21:26,564 INFO L124 PetriNetUnfolderBase]: 59/1157 cut-off events. [2023-08-25 08:21:26,564 INFO L125 PetriNetUnfolderBase]: For 1122/1122 co-relation queries the response was YES. [2023-08-25 08:21:26,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1386 conditions, 1157 events. 59/1157 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 5213 event pairs, 0 based on Foata normal form. 0/856 useless extension candidates. Maximal degree in co-relation 1345. Up to 38 conditions per place. [2023-08-25 08:21:26,756 INFO L119 LiptonReduction]: Number of co-enabled transitions 790614 [2023-08-25 08:21:29,863 INFO L134 LiptonReduction]: Checked pairs total: 4504127 [2023-08-25 08:21:29,863 INFO L136 LiptonReduction]: Total number of compositions: 372 [2023-08-25 08:21:29,864 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:21:29,864 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:21:29,864 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:21:29,995 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:21:29,995 INFO L124 PetriNetUnfolderBase]: 15/669 cut-off events. [2023-08-25 08:21:29,995 INFO L125 PetriNetUnfolderBase]: For 1122/1122 co-relation queries the response was YES. [2023-08-25 08:21:29,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:21:29,995 INFO L208 CegarLoopForPetriNet]: trace histogram [19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:21:29,995 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:21:29,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:21:29,995 INFO L85 PathProgramCache]: Analyzing trace with hash 515827945, now seen corresponding path program 1 times [2023-08-25 08:21:29,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:21:29,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656243490] [2023-08-25 08:21:29,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:21:29,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:21:30,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:21:30,023 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:21:30,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:21:30,054 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:21:30,054 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:21:30,054 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:21:30,054 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:21:30,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-25 08:21:30,054 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:21:30,055 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:21:30,055 WARN L233 ceAbstractionStarter]: 18 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:21:30,055 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 19 thread instances. [2023-08-25 08:21:30,165 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:21:30,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1460 places, 1497 transitions, 3868 flow [2023-08-25 08:21:30,593 INFO L124 PetriNetUnfolderBase]: 62/1218 cut-off events. [2023-08-25 08:21:30,593 INFO L125 PetriNetUnfolderBase]: For 1311/1311 co-relation queries the response was YES. [2023-08-25 08:21:30,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1487 conditions, 1218 events. 62/1218 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 5532 event pairs, 0 based on Foata normal form. 0/901 useless extension candidates. Maximal degree in co-relation 1448. Up to 40 conditions per place. [2023-08-25 08:21:30,639 INFO L82 GeneralOperation]: Start removeDead. Operand has 1460 places, 1497 transitions, 3868 flow [2023-08-25 08:21:30,648 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 991 places, 992 transitions, 2424 flow [2023-08-25 08:21:30,648 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:21:30,648 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 991 places, 992 transitions, 2424 flow [2023-08-25 08:21:30,648 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 991 places, 992 transitions, 2424 flow [2023-08-25 08:21:30,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 991 places, 992 transitions, 2424 flow [2023-08-25 08:21:31,059 INFO L124 PetriNetUnfolderBase]: 62/1218 cut-off events. [2023-08-25 08:21:31,059 INFO L125 PetriNetUnfolderBase]: For 1311/1311 co-relation queries the response was YES. [2023-08-25 08:21:31,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1469 conditions, 1218 events. 62/1218 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 5531 event pairs, 0 based on Foata normal form. 0/901 useless extension candidates. Maximal degree in co-relation 1427. Up to 40 conditions per place. [2023-08-25 08:21:31,262 INFO L119 LiptonReduction]: Number of co-enabled transitions 879180 [2023-08-25 08:21:34,457 INFO L134 LiptonReduction]: Checked pairs total: 5043141 [2023-08-25 08:21:34,458 INFO L136 LiptonReduction]: Total number of compositions: 383 [2023-08-25 08:21:34,459 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:21:34,459 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:21:34,459 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:21:34,610 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:21:34,610 INFO L124 PetriNetUnfolderBase]: 16/710 cut-off events. [2023-08-25 08:21:34,610 INFO L125 PetriNetUnfolderBase]: For 1311/1311 co-relation queries the response was YES. [2023-08-25 08:21:34,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:21:34,610 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:21:34,610 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:21:34,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:21:34,611 INFO L85 PathProgramCache]: Analyzing trace with hash 418015153, now seen corresponding path program 1 times [2023-08-25 08:21:34,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:21:34,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129395349] [2023-08-25 08:21:34,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:21:34,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:21:34,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:21:34,638 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:21:34,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:21:34,673 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:21:34,673 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:21:34,673 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:21:34,673 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:21:34,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-25 08:21:34,674 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:21:34,674 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:21:34,674 WARN L233 ceAbstractionStarter]: 19 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:21:34,674 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 20 thread instances. [2023-08-25 08:21:34,777 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:21:34,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1535 places, 1574 transitions, 4108 flow [2023-08-25 08:21:35,241 INFO L124 PetriNetUnfolderBase]: 65/1279 cut-off events. [2023-08-25 08:21:35,241 INFO L125 PetriNetUnfolderBase]: For 1520/1520 co-relation queries the response was YES. [2023-08-25 08:21:35,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1572 conditions, 1279 events. 65/1279 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 5815 event pairs, 0 based on Foata normal form. 0/946 useless extension candidates. Maximal degree in co-relation 1531. Up to 42 conditions per place. [2023-08-25 08:21:35,290 INFO L82 GeneralOperation]: Start removeDead. Operand has 1535 places, 1574 transitions, 4108 flow [2023-08-25 08:21:35,300 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1040 places, 1041 transitions, 2565 flow [2023-08-25 08:21:35,300 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:21:35,300 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1040 places, 1041 transitions, 2565 flow [2023-08-25 08:21:35,300 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1040 places, 1041 transitions, 2565 flow [2023-08-25 08:21:35,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1040 places, 1041 transitions, 2565 flow [2023-08-25 08:21:35,792 INFO L124 PetriNetUnfolderBase]: 65/1279 cut-off events. [2023-08-25 08:21:35,792 INFO L125 PetriNetUnfolderBase]: For 1520/1520 co-relation queries the response was YES. [2023-08-25 08:21:35,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1553 conditions, 1279 events. 65/1279 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 5817 event pairs, 0 based on Foata normal form. 0/946 useless extension candidates. Maximal degree in co-relation 1510. Up to 42 conditions per place. [2023-08-25 08:21:35,983 INFO L119 LiptonReduction]: Number of co-enabled transitions 972450 [2023-08-25 08:21:39,371 INFO L134 LiptonReduction]: Checked pairs total: 5576069 [2023-08-25 08:21:39,371 INFO L136 LiptonReduction]: Total number of compositions: 404 [2023-08-25 08:21:39,372 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:21:39,373 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:21:39,373 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:21:39,569 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:21:39,569 INFO L124 PetriNetUnfolderBase]: 17/752 cut-off events. [2023-08-25 08:21:39,569 INFO L125 PetriNetUnfolderBase]: For 1520/1520 co-relation queries the response was YES. [2023-08-25 08:21:39,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:21:39,570 INFO L208 CegarLoopForPetriNet]: trace histogram [21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:21:39,570 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:21:39,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:21:39,570 INFO L85 PathProgramCache]: Analyzing trace with hash -486389476, now seen corresponding path program 1 times [2023-08-25 08:21:39,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:21:39,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125294040] [2023-08-25 08:21:39,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:21:39,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:21:39,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:21:39,602 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:21:39,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:21:39,635 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:21:39,635 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:21:39,635 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:21:39,635 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:21:39,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-25 08:21:39,635 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:21:39,636 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:21:39,636 WARN L233 ceAbstractionStarter]: 20 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:21:39,636 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 21 thread instances. [2023-08-25 08:21:39,765 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:21:39,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1610 places, 1651 transitions, 4352 flow [2023-08-25 08:21:40,305 INFO L124 PetriNetUnfolderBase]: 68/1340 cut-off events. [2023-08-25 08:21:40,305 INFO L125 PetriNetUnfolderBase]: For 1750/1750 co-relation queries the response was YES. [2023-08-25 08:21:40,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1658 conditions, 1340 events. 68/1340 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 6129 event pairs, 0 based on Foata normal form. 0/991 useless extension candidates. Maximal degree in co-relation 1615. Up to 44 conditions per place. [2023-08-25 08:21:40,362 INFO L82 GeneralOperation]: Start removeDead. Operand has 1610 places, 1651 transitions, 4352 flow [2023-08-25 08:21:40,373 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1089 places, 1090 transitions, 2708 flow [2023-08-25 08:21:40,373 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:21:40,373 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1089 places, 1090 transitions, 2708 flow [2023-08-25 08:21:40,373 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1089 places, 1090 transitions, 2708 flow [2023-08-25 08:21:40,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1089 places, 1090 transitions, 2708 flow [2023-08-25 08:21:40,956 INFO L124 PetriNetUnfolderBase]: 68/1340 cut-off events. [2023-08-25 08:21:40,957 INFO L125 PetriNetUnfolderBase]: For 1750/1750 co-relation queries the response was YES. [2023-08-25 08:21:40,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1638 conditions, 1340 events. 68/1340 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 6126 event pairs, 0 based on Foata normal form. 0/991 useless extension candidates. Maximal degree in co-relation 1594. Up to 44 conditions per place. [2023-08-25 08:21:41,210 INFO L119 LiptonReduction]: Number of co-enabled transitions 1070424 [2023-08-25 08:21:44,698 INFO L134 LiptonReduction]: Checked pairs total: 6100695 [2023-08-25 08:21:44,699 INFO L136 LiptonReduction]: Total number of compositions: 421 [2023-08-25 08:21:44,700 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:21:44,700 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:21:44,700 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:21:44,945 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:21:44,945 INFO L124 PetriNetUnfolderBase]: 18/794 cut-off events. [2023-08-25 08:21:44,945 INFO L125 PetriNetUnfolderBase]: For 1750/1750 co-relation queries the response was YES. [2023-08-25 08:21:44,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:21:44,945 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:21:44,946 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:21:44,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:21:44,946 INFO L85 PathProgramCache]: Analyzing trace with hash -972937498, now seen corresponding path program 1 times [2023-08-25 08:21:44,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:21:44,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665190887] [2023-08-25 08:21:44,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:21:44,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:21:45,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:21:45,008 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:21:45,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:21:45,052 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:21:45,052 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:21:45,052 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:21:45,052 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:21:45,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-25 08:21:45,053 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:21:45,053 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:21:45,053 WARN L233 ceAbstractionStarter]: 21 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:21:45,053 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 22 thread instances. [2023-08-25 08:21:45,169 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:21:45,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1685 places, 1728 transitions, 4600 flow [2023-08-25 08:21:45,825 INFO L124 PetriNetUnfolderBase]: 71/1401 cut-off events. [2023-08-25 08:21:45,826 INFO L125 PetriNetUnfolderBase]: For 2002/2002 co-relation queries the response was YES. [2023-08-25 08:21:45,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1745 conditions, 1401 events. 71/1401 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 6480 event pairs, 0 based on Foata normal form. 0/1036 useless extension candidates. Maximal degree in co-relation 1700. Up to 46 conditions per place. [2023-08-25 08:21:45,889 INFO L82 GeneralOperation]: Start removeDead. Operand has 1685 places, 1728 transitions, 4600 flow [2023-08-25 08:21:45,900 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1138 places, 1139 transitions, 2853 flow [2023-08-25 08:21:45,900 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:21:45,900 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1138 places, 1139 transitions, 2853 flow [2023-08-25 08:21:45,900 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1138 places, 1139 transitions, 2853 flow [2023-08-25 08:21:45,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1138 places, 1139 transitions, 2853 flow [2023-08-25 08:21:46,422 INFO L124 PetriNetUnfolderBase]: 71/1401 cut-off events. [2023-08-25 08:21:46,423 INFO L125 PetriNetUnfolderBase]: For 2002/2002 co-relation queries the response was YES. [2023-08-25 08:21:46,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1724 conditions, 1401 events. 71/1401 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 6488 event pairs, 0 based on Foata normal form. 0/1036 useless extension candidates. Maximal degree in co-relation 1679. Up to 46 conditions per place. [2023-08-25 08:21:46,820 INFO L119 LiptonReduction]: Number of co-enabled transitions 1173102 [2023-08-25 08:21:50,552 INFO L134 LiptonReduction]: Checked pairs total: 6740353 [2023-08-25 08:21:50,552 INFO L136 LiptonReduction]: Total number of compositions: 446 [2023-08-25 08:21:50,553 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:21:50,554 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:21:50,554 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:21:50,757 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:21:50,757 INFO L124 PetriNetUnfolderBase]: 19/834 cut-off events. [2023-08-25 08:21:50,757 INFO L125 PetriNetUnfolderBase]: For 2002/2002 co-relation queries the response was YES. [2023-08-25 08:21:50,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:21:50,757 INFO L208 CegarLoopForPetriNet]: trace histogram [23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:21:50,757 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:21:50,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:21:50,757 INFO L85 PathProgramCache]: Analyzing trace with hash 990358277, now seen corresponding path program 1 times [2023-08-25 08:21:50,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:21:50,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773793554] [2023-08-25 08:21:50,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:21:50,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:21:50,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:21:50,795 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:21:50,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:21:50,894 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:21:50,894 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:21:50,894 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:21:50,894 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:21:50,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-25 08:21:50,894 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:21:50,895 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:21:50,895 WARN L233 ceAbstractionStarter]: 22 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:21:50,895 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 23 thread instances. [2023-08-25 08:21:51,016 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:21:51,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1760 places, 1805 transitions, 4852 flow [2023-08-25 08:21:51,620 INFO L124 PetriNetUnfolderBase]: 74/1462 cut-off events. [2023-08-25 08:21:51,620 INFO L125 PetriNetUnfolderBase]: For 2277/2277 co-relation queries the response was YES. [2023-08-25 08:21:51,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1833 conditions, 1462 events. 74/1462 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 6757 event pairs, 0 based on Foata normal form. 0/1081 useless extension candidates. Maximal degree in co-relation 1786. Up to 48 conditions per place. [2023-08-25 08:21:51,689 INFO L82 GeneralOperation]: Start removeDead. Operand has 1760 places, 1805 transitions, 4852 flow [2023-08-25 08:21:51,702 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1187 places, 1188 transitions, 3000 flow [2023-08-25 08:21:51,702 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:21:51,702 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1187 places, 1188 transitions, 3000 flow [2023-08-25 08:21:51,702 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1187 places, 1188 transitions, 3000 flow [2023-08-25 08:21:51,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1187 places, 1188 transitions, 3000 flow [2023-08-25 08:21:52,283 INFO L124 PetriNetUnfolderBase]: 74/1462 cut-off events. [2023-08-25 08:21:52,284 INFO L125 PetriNetUnfolderBase]: For 2277/2277 co-relation queries the response was YES. [2023-08-25 08:21:52,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1811 conditions, 1462 events. 74/1462 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 6768 event pairs, 0 based on Foata normal form. 0/1081 useless extension candidates. Maximal degree in co-relation 1765. Up to 48 conditions per place. [2023-08-25 08:21:52,735 INFO L119 LiptonReduction]: Number of co-enabled transitions 1280484 [2023-08-25 08:21:56,861 INFO L134 LiptonReduction]: Checked pairs total: 7325499 [2023-08-25 08:21:56,861 INFO L136 LiptonReduction]: Total number of compositions: 469 [2023-08-25 08:21:56,863 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:21:56,863 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:21:56,863 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:21:57,106 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:21:57,107 INFO L124 PetriNetUnfolderBase]: 20/875 cut-off events. [2023-08-25 08:21:57,107 INFO L125 PetriNetUnfolderBase]: For 2277/2277 co-relation queries the response was YES. [2023-08-25 08:21:57,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:21:57,107 INFO L208 CegarLoopForPetriNet]: trace histogram [24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:21:57,107 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:21:57,107 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:21:57,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1958828503, now seen corresponding path program 1 times [2023-08-25 08:21:57,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:21:57,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564702595] [2023-08-25 08:21:57,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:21:57,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:21:57,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:21:57,144 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:21:57,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:21:57,183 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:21:57,184 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:21:57,184 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:21:57,184 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:21:57,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-25 08:21:57,184 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:21:57,184 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:21:57,184 WARN L233 ceAbstractionStarter]: 23 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:21:57,184 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 24 thread instances. [2023-08-25 08:21:57,312 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:21:57,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1835 places, 1882 transitions, 5108 flow [2023-08-25 08:21:57,954 INFO L124 PetriNetUnfolderBase]: 77/1523 cut-off events. [2023-08-25 08:21:57,954 INFO L125 PetriNetUnfolderBase]: For 2576/2576 co-relation queries the response was YES. [2023-08-25 08:21:58,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1922 conditions, 1523 events. 77/1523 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 7099 event pairs, 0 based on Foata normal form. 0/1126 useless extension candidates. Maximal degree in co-relation 1873. Up to 50 conditions per place. [2023-08-25 08:21:58,026 INFO L82 GeneralOperation]: Start removeDead. Operand has 1835 places, 1882 transitions, 5108 flow [2023-08-25 08:21:58,041 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1236 places, 1237 transitions, 3149 flow [2023-08-25 08:21:58,041 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:21:58,041 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1236 places, 1237 transitions, 3149 flow [2023-08-25 08:21:58,041 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1236 places, 1237 transitions, 3149 flow [2023-08-25 08:21:58,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1236 places, 1237 transitions, 3149 flow [2023-08-25 08:21:58,661 INFO L124 PetriNetUnfolderBase]: 77/1523 cut-off events. [2023-08-25 08:21:58,661 INFO L125 PetriNetUnfolderBase]: For 2576/2576 co-relation queries the response was YES. [2023-08-25 08:21:58,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1899 conditions, 1523 events. 77/1523 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 7093 event pairs, 0 based on Foata normal form. 0/1126 useless extension candidates. Maximal degree in co-relation 1852. Up to 50 conditions per place. [2023-08-25 08:21:59,015 INFO L119 LiptonReduction]: Number of co-enabled transitions 1392570 [2023-08-25 08:22:02,992 INFO L134 LiptonReduction]: Checked pairs total: 7986180 [2023-08-25 08:22:02,992 INFO L136 LiptonReduction]: Total number of compositions: 476 [2023-08-25 08:22:02,993 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:22:02,993 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:22:02,993 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:22:03,259 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:22:03,260 INFO L124 PetriNetUnfolderBase]: 21/913 cut-off events. [2023-08-25 08:22:03,260 INFO L125 PetriNetUnfolderBase]: For 2576/2576 co-relation queries the response was YES. [2023-08-25 08:22:03,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:22:03,260 INFO L208 CegarLoopForPetriNet]: trace histogram [25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:22:03,260 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:22:03,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:22:03,260 INFO L85 PathProgramCache]: Analyzing trace with hash -2060304313, now seen corresponding path program 1 times [2023-08-25 08:22:03,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:22:03,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369406856] [2023-08-25 08:22:03,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:22:03,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:22:03,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:22:03,292 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:22:03,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:22:03,339 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:22:03,339 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:22:03,339 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:22:03,339 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:22:03,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-25 08:22:03,339 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:22:03,340 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:22:03,340 WARN L233 ceAbstractionStarter]: 24 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:22:03,340 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 25 thread instances. [2023-08-25 08:22:03,476 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:22:03,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1910 places, 1959 transitions, 5368 flow [2023-08-25 08:22:04,263 INFO L124 PetriNetUnfolderBase]: 80/1584 cut-off events. [2023-08-25 08:22:04,264 INFO L125 PetriNetUnfolderBase]: For 2900/2900 co-relation queries the response was YES. [2023-08-25 08:22:04,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2012 conditions, 1584 events. 80/1584 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 7370 event pairs, 0 based on Foata normal form. 0/1171 useless extension candidates. Maximal degree in co-relation 1961. Up to 52 conditions per place. [2023-08-25 08:22:04,321 INFO L82 GeneralOperation]: Start removeDead. Operand has 1910 places, 1959 transitions, 5368 flow [2023-08-25 08:22:04,332 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1285 places, 1286 transitions, 3300 flow [2023-08-25 08:22:04,332 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:22:04,332 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1285 places, 1286 transitions, 3300 flow [2023-08-25 08:22:04,332 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1285 places, 1286 transitions, 3300 flow [2023-08-25 08:22:04,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1285 places, 1286 transitions, 3300 flow [2023-08-25 08:22:04,977 INFO L124 PetriNetUnfolderBase]: 80/1584 cut-off events. [2023-08-25 08:22:04,977 INFO L125 PetriNetUnfolderBase]: For 2900/2900 co-relation queries the response was YES. [2023-08-25 08:22:05,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1988 conditions, 1584 events. 80/1584 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 7369 event pairs, 0 based on Foata normal form. 0/1171 useless extension candidates. Maximal degree in co-relation 1940. Up to 52 conditions per place. [2023-08-25 08:22:05,348 INFO L119 LiptonReduction]: Number of co-enabled transitions 1509360 [2023-08-25 08:22:09,759 INFO L134 LiptonReduction]: Checked pairs total: 10118139 [2023-08-25 08:22:09,759 INFO L136 LiptonReduction]: Total number of compositions: 503 [2023-08-25 08:22:09,761 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:22:09,761 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:22:09,761 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:22:10,049 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:22:10,050 INFO L124 PetriNetUnfolderBase]: 21/956 cut-off events. [2023-08-25 08:22:10,050 INFO L125 PetriNetUnfolderBase]: For 2900/2900 co-relation queries the response was YES. [2023-08-25 08:22:10,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:22:10,050 INFO L208 CegarLoopForPetriNet]: trace histogram [26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:22:10,050 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:22:10,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:22:10,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1235497557, now seen corresponding path program 1 times [2023-08-25 08:22:10,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:22:10,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457780608] [2023-08-25 08:22:10,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:22:10,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:22:10,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:22:10,105 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:22:10,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:22:10,153 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:22:10,153 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:22:10,153 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:22:10,153 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:22:10,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-25 08:22:10,153 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:22:10,154 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:22:10,154 WARN L233 ceAbstractionStarter]: 25 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:22:10,154 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 26 thread instances. [2023-08-25 08:22:10,307 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:22:10,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1985 places, 2036 transitions, 5632 flow [2023-08-25 08:22:11,217 INFO L124 PetriNetUnfolderBase]: 83/1645 cut-off events. [2023-08-25 08:22:11,217 INFO L125 PetriNetUnfolderBase]: For 3250/3250 co-relation queries the response was YES. [2023-08-25 08:22:11,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2103 conditions, 1645 events. 83/1645 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 7661 event pairs, 0 based on Foata normal form. 0/1216 useless extension candidates. Maximal degree in co-relation 2050. Up to 54 conditions per place. [2023-08-25 08:22:11,288 INFO L82 GeneralOperation]: Start removeDead. Operand has 1985 places, 2036 transitions, 5632 flow [2023-08-25 08:22:11,301 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1334 places, 1335 transitions, 3453 flow [2023-08-25 08:22:11,301 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:22:11,301 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1334 places, 1335 transitions, 3453 flow [2023-08-25 08:22:11,302 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1334 places, 1335 transitions, 3453 flow [2023-08-25 08:22:11,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1334 places, 1335 transitions, 3453 flow [2023-08-25 08:22:12,006 INFO L124 PetriNetUnfolderBase]: 83/1645 cut-off events. [2023-08-25 08:22:12,007 INFO L125 PetriNetUnfolderBase]: For 3250/3250 co-relation queries the response was YES. [2023-08-25 08:22:12,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2078 conditions, 1645 events. 83/1645 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 7656 event pairs, 0 based on Foata normal form. 0/1216 useless extension candidates. Maximal degree in co-relation 2029. Up to 54 conditions per place. [2023-08-25 08:22:12,423 INFO L119 LiptonReduction]: Number of co-enabled transitions 1630854 [2023-08-25 08:22:16,914 INFO L134 LiptonReduction]: Checked pairs total: 9403279 [2023-08-25 08:22:16,915 INFO L136 LiptonReduction]: Total number of compositions: 514 [2023-08-25 08:22:16,916 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:22:16,916 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:22:16,916 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:22:17,218 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:22:17,218 INFO L124 PetriNetUnfolderBase]: 23/996 cut-off events. [2023-08-25 08:22:17,218 INFO L125 PetriNetUnfolderBase]: For 3250/3250 co-relation queries the response was YES. [2023-08-25 08:22:17,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:22:17,219 INFO L208 CegarLoopForPetriNet]: trace histogram [27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:22:17,219 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:22:17,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:22:17,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1336855688, now seen corresponding path program 1 times [2023-08-25 08:22:17,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:22:17,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930756441] [2023-08-25 08:22:17,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:22:17,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:22:17,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:22:17,252 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:22:17,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:22:17,291 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:22:17,291 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:22:17,291 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:22:17,292 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:22:17,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-25 08:22:17,292 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:22:17,292 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:22:17,292 WARN L233 ceAbstractionStarter]: 26 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:22:17,292 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 27 thread instances. [2023-08-25 08:22:17,416 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:22:17,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2060 places, 2113 transitions, 5900 flow [2023-08-25 08:22:18,317 INFO L124 PetriNetUnfolderBase]: 86/1706 cut-off events. [2023-08-25 08:22:18,317 INFO L125 PetriNetUnfolderBase]: For 3627/3627 co-relation queries the response was YES. [2023-08-25 08:22:18,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2195 conditions, 1706 events. 86/1706 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 7977 event pairs, 0 based on Foata normal form. 0/1261 useless extension candidates. Maximal degree in co-relation 2140. Up to 56 conditions per place. [2023-08-25 08:22:18,373 INFO L82 GeneralOperation]: Start removeDead. Operand has 2060 places, 2113 transitions, 5900 flow [2023-08-25 08:22:18,383 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1383 places, 1384 transitions, 3608 flow [2023-08-25 08:22:18,384 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:22:18,384 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1383 places, 1384 transitions, 3608 flow [2023-08-25 08:22:18,384 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1383 places, 1384 transitions, 3608 flow [2023-08-25 08:22:18,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1383 places, 1384 transitions, 3608 flow [2023-08-25 08:22:19,109 INFO L124 PetriNetUnfolderBase]: 86/1706 cut-off events. [2023-08-25 08:22:19,109 INFO L125 PetriNetUnfolderBase]: For 3627/3627 co-relation queries the response was YES. [2023-08-25 08:22:19,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2169 conditions, 1706 events. 86/1706 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 7971 event pairs, 0 based on Foata normal form. 0/1261 useless extension candidates. Maximal degree in co-relation 2119. Up to 56 conditions per place. [2023-08-25 08:22:19,556 INFO L119 LiptonReduction]: Number of co-enabled transitions 1757052 [2023-08-25 08:22:24,288 INFO L134 LiptonReduction]: Checked pairs total: 11787336 [2023-08-25 08:22:24,289 INFO L136 LiptonReduction]: Total number of compositions: 525 [2023-08-25 08:22:24,290 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:22:24,290 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:22:24,290 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:22:24,616 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:22:24,617 INFO L124 PetriNetUnfolderBase]: 24/1039 cut-off events. [2023-08-25 08:22:24,617 INFO L125 PetriNetUnfolderBase]: For 3627/3627 co-relation queries the response was YES. [2023-08-25 08:22:24,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:22:24,617 INFO L208 CegarLoopForPetriNet]: trace histogram [28, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:22:24,617 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:22:24,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:22:24,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1457842597, now seen corresponding path program 1 times [2023-08-25 08:22:24,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:22:24,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165075487] [2023-08-25 08:22:24,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:22:24,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:22:24,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:22:24,664 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:22:24,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:22:24,707 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:22:24,708 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:22:24,708 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:22:24,708 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:22:24,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-25 08:22:24,708 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:22:24,709 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:22:24,709 WARN L233 ceAbstractionStarter]: 27 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:22:24,709 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 28 thread instances. [2023-08-25 08:22:24,864 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:22:24,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2135 places, 2190 transitions, 6172 flow [2023-08-25 08:22:25,886 INFO L124 PetriNetUnfolderBase]: 89/1767 cut-off events. [2023-08-25 08:22:25,886 INFO L125 PetriNetUnfolderBase]: For 4032/4032 co-relation queries the response was YES. [2023-08-25 08:22:25,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2288 conditions, 1767 events. 89/1767 cut-off events. For 4032/4032 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 8300 event pairs, 0 based on Foata normal form. 0/1306 useless extension candidates. Maximal degree in co-relation 2231. Up to 58 conditions per place. [2023-08-25 08:22:25,951 INFO L82 GeneralOperation]: Start removeDead. Operand has 2135 places, 2190 transitions, 6172 flow [2023-08-25 08:22:25,963 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1432 places, 1433 transitions, 3765 flow [2023-08-25 08:22:25,964 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:22:25,964 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1432 places, 1433 transitions, 3765 flow [2023-08-25 08:22:25,964 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1432 places, 1433 transitions, 3765 flow [2023-08-25 08:22:25,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1432 places, 1433 transitions, 3765 flow [2023-08-25 08:22:26,916 INFO L124 PetriNetUnfolderBase]: 89/1767 cut-off events. [2023-08-25 08:22:26,916 INFO L125 PetriNetUnfolderBase]: For 4032/4032 co-relation queries the response was YES. [2023-08-25 08:22:27,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2261 conditions, 1767 events. 89/1767 cut-off events. For 4032/4032 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 8395 event pairs, 0 based on Foata normal form. 0/1306 useless extension candidates. Maximal degree in co-relation 2210. Up to 58 conditions per place. [2023-08-25 08:22:27,401 INFO L119 LiptonReduction]: Number of co-enabled transitions 1887954 [2023-08-25 08:22:32,247 INFO L134 LiptonReduction]: Checked pairs total: 12723186 [2023-08-25 08:22:32,247 INFO L136 LiptonReduction]: Total number of compositions: 546 [2023-08-25 08:22:32,248 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:22:32,249 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:22:32,249 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:22:32,614 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:22:32,614 INFO L124 PetriNetUnfolderBase]: 25/1077 cut-off events. [2023-08-25 08:22:32,614 INFO L125 PetriNetUnfolderBase]: For 4032/4032 co-relation queries the response was YES. [2023-08-25 08:22:32,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:22:32,614 INFO L208 CegarLoopForPetriNet]: trace histogram [29, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:22:32,615 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:22:32,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:22:32,615 INFO L85 PathProgramCache]: Analyzing trace with hash -2142696287, now seen corresponding path program 1 times [2023-08-25 08:22:32,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:22:32,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485223631] [2023-08-25 08:22:32,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:22:32,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:22:32,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:22:32,652 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:22:32,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:22:32,694 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:22:32,695 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:22:32,695 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:22:32,695 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:22:32,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-25 08:22:32,695 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:22:32,695 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:22:32,696 WARN L233 ceAbstractionStarter]: 28 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:22:32,696 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 29 thread instances. [2023-08-25 08:22:32,829 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:22:32,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2210 places, 2267 transitions, 6448 flow [2023-08-25 08:22:33,929 INFO L124 PetriNetUnfolderBase]: 92/1828 cut-off events. [2023-08-25 08:22:33,929 INFO L125 PetriNetUnfolderBase]: For 4466/4466 co-relation queries the response was YES. [2023-08-25 08:22:34,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2382 conditions, 1828 events. 92/1828 cut-off events. For 4466/4466 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 8618 event pairs, 0 based on Foata normal form. 0/1351 useless extension candidates. Maximal degree in co-relation 2323. Up to 60 conditions per place. [2023-08-25 08:22:34,045 INFO L82 GeneralOperation]: Start removeDead. Operand has 2210 places, 2267 transitions, 6448 flow [2023-08-25 08:22:34,063 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1481 places, 1482 transitions, 3924 flow [2023-08-25 08:22:34,063 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:22:34,063 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1481 places, 1482 transitions, 3924 flow [2023-08-25 08:22:34,063 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1481 places, 1482 transitions, 3924 flow [2023-08-25 08:22:34,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1481 places, 1482 transitions, 3924 flow [2023-08-25 08:22:34,983 INFO L124 PetriNetUnfolderBase]: 92/1828 cut-off events. [2023-08-25 08:22:34,984 INFO L125 PetriNetUnfolderBase]: For 4466/4466 co-relation queries the response was YES. [2023-08-25 08:22:35,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2354 conditions, 1828 events. 92/1828 cut-off events. For 4466/4466 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 8629 event pairs, 0 based on Foata normal form. 0/1351 useless extension candidates. Maximal degree in co-relation 2302. Up to 60 conditions per place. [2023-08-25 08:22:35,397 INFO L119 LiptonReduction]: Number of co-enabled transitions 2023560 [2023-08-25 08:22:40,625 INFO L134 LiptonReduction]: Checked pairs total: 11742227 [2023-08-25 08:22:40,626 INFO L136 LiptonReduction]: Total number of compositions: 569 [2023-08-25 08:22:40,627 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:22:40,627 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:22:40,627 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:22:41,048 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:22:41,048 INFO L124 PetriNetUnfolderBase]: 26/1119 cut-off events. [2023-08-25 08:22:41,048 INFO L125 PetriNetUnfolderBase]: For 4466/4466 co-relation queries the response was YES. [2023-08-25 08:22:41,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:22:41,049 INFO L208 CegarLoopForPetriNet]: trace histogram [30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:22:41,049 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:22:41,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:22:41,049 INFO L85 PathProgramCache]: Analyzing trace with hash -2053520388, now seen corresponding path program 1 times [2023-08-25 08:22:41,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:22:41,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729063568] [2023-08-25 08:22:41,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:22:41,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:22:41,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:22:41,088 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:22:41,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:22:41,138 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:22:41,139 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:22:41,139 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:22:41,139 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:22:41,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-25 08:22:41,139 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:22:41,139 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:22:41,139 WARN L233 ceAbstractionStarter]: 29 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:22:41,139 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 30 thread instances. [2023-08-25 08:22:41,294 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:22:41,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2285 places, 2344 transitions, 6728 flow [2023-08-25 08:22:42,368 INFO L124 PetriNetUnfolderBase]: 95/1889 cut-off events. [2023-08-25 08:22:42,368 INFO L125 PetriNetUnfolderBase]: For 4930/4930 co-relation queries the response was YES. [2023-08-25 08:22:42,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2477 conditions, 1889 events. 95/1889 cut-off events. For 4930/4930 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 8882 event pairs, 0 based on Foata normal form. 0/1396 useless extension candidates. Maximal degree in co-relation 2416. Up to 62 conditions per place. [2023-08-25 08:22:42,493 INFO L82 GeneralOperation]: Start removeDead. Operand has 2285 places, 2344 transitions, 6728 flow [2023-08-25 08:22:42,512 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1530 places, 1531 transitions, 4085 flow [2023-08-25 08:22:42,513 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:22:42,513 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1530 places, 1531 transitions, 4085 flow [2023-08-25 08:22:42,513 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1530 places, 1531 transitions, 4085 flow [2023-08-25 08:22:42,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1530 places, 1531 transitions, 4085 flow [2023-08-25 08:22:43,638 INFO L124 PetriNetUnfolderBase]: 95/1889 cut-off events. [2023-08-25 08:22:43,639 INFO L125 PetriNetUnfolderBase]: For 4930/4930 co-relation queries the response was YES. [2023-08-25 08:22:43,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2448 conditions, 1889 events. 95/1889 cut-off events. For 4930/4930 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 9049 event pairs, 0 based on Foata normal form. 0/1396 useless extension candidates. Maximal degree in co-relation 2395. Up to 62 conditions per place. [2023-08-25 08:22:44,055 INFO L119 LiptonReduction]: Number of co-enabled transitions 2163870 [2023-08-25 08:22:49,349 INFO L134 LiptonReduction]: Checked pairs total: 14647496 [2023-08-25 08:22:49,350 INFO L136 LiptonReduction]: Total number of compositions: 580 [2023-08-25 08:22:49,351 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:22:49,351 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:22:49,351 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:22:49,754 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:22:49,754 INFO L124 PetriNetUnfolderBase]: 27/1163 cut-off events. [2023-08-25 08:22:49,754 INFO L125 PetriNetUnfolderBase]: For 4930/4930 co-relation queries the response was YES. [2023-08-25 08:22:49,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:22:49,754 INFO L208 CegarLoopForPetriNet]: trace histogram [31, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:22:49,754 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:22:49,754 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:22:49,754 INFO L85 PathProgramCache]: Analyzing trace with hash -497476230, now seen corresponding path program 1 times [2023-08-25 08:22:49,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:22:49,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060430824] [2023-08-25 08:22:49,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:22:49,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:22:49,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:22:49,800 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:22:49,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:22:49,848 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:22:49,848 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:22:49,848 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:22:49,849 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:22:49,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-08-25 08:22:49,849 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:22:49,850 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:22:49,850 WARN L233 ceAbstractionStarter]: 30 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:22:49,850 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 31 thread instances. [2023-08-25 08:22:50,020 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:22:50,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2360 places, 2421 transitions, 7012 flow [2023-08-25 08:22:51,344 INFO L124 PetriNetUnfolderBase]: 98/1950 cut-off events. [2023-08-25 08:22:51,344 INFO L125 PetriNetUnfolderBase]: For 5425/5425 co-relation queries the response was YES. [2023-08-25 08:22:51,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2573 conditions, 1950 events. 98/1950 cut-off events. For 5425/5425 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 9178 event pairs, 0 based on Foata normal form. 0/1441 useless extension candidates. Maximal degree in co-relation 2510. Up to 64 conditions per place. [2023-08-25 08:22:51,490 INFO L82 GeneralOperation]: Start removeDead. Operand has 2360 places, 2421 transitions, 7012 flow [2023-08-25 08:22:51,511 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1579 places, 1580 transitions, 4248 flow [2023-08-25 08:22:51,511 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:22:51,511 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1579 places, 1580 transitions, 4248 flow [2023-08-25 08:22:51,511 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1579 places, 1580 transitions, 4248 flow [2023-08-25 08:22:51,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1579 places, 1580 transitions, 4248 flow [2023-08-25 08:22:52,609 INFO L124 PetriNetUnfolderBase]: 98/1950 cut-off events. [2023-08-25 08:22:52,609 INFO L125 PetriNetUnfolderBase]: For 5425/5425 co-relation queries the response was YES. [2023-08-25 08:22:52,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2543 conditions, 1950 events. 98/1950 cut-off events. For 5425/5425 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 9149 event pairs, 0 based on Foata normal form. 0/1441 useless extension candidates. Maximal degree in co-relation 2489. Up to 64 conditions per place. [2023-08-25 08:22:53,106 INFO L119 LiptonReduction]: Number of co-enabled transitions 2308884 [2023-08-25 08:22:58,794 INFO L134 LiptonReduction]: Checked pairs total: 13335745 [2023-08-25 08:22:58,794 INFO L136 LiptonReduction]: Total number of compositions: 609 [2023-08-25 08:22:58,795 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:22:58,796 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:22:58,796 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:22:59,230 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:22:59,230 INFO L124 PetriNetUnfolderBase]: 28/1201 cut-off events. [2023-08-25 08:22:59,230 INFO L125 PetriNetUnfolderBase]: For 5425/5425 co-relation queries the response was YES. [2023-08-25 08:22:59,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:22:59,230 INFO L208 CegarLoopForPetriNet]: trace histogram [32, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:22:59,230 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:22:59,230 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:22:59,230 INFO L85 PathProgramCache]: Analyzing trace with hash -457307660, now seen corresponding path program 1 times [2023-08-25 08:22:59,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:22:59,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483471770] [2023-08-25 08:22:59,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:22:59,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:22:59,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:22:59,275 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:22:59,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:22:59,323 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:22:59,323 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:22:59,323 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:22:59,323 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:22:59,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-08-25 08:22:59,324 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:22:59,324 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:22:59,324 WARN L233 ceAbstractionStarter]: 31 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:22:59,324 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 32 thread instances. [2023-08-25 08:22:59,497 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:22:59,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2435 places, 2498 transitions, 7300 flow [2023-08-25 08:23:00,894 INFO L124 PetriNetUnfolderBase]: 101/2011 cut-off events. [2023-08-25 08:23:00,894 INFO L125 PetriNetUnfolderBase]: For 5952/5952 co-relation queries the response was YES. [2023-08-25 08:23:01,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2670 conditions, 2011 events. 101/2011 cut-off events. For 5952/5952 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 9517 event pairs, 0 based on Foata normal form. 0/1486 useless extension candidates. Maximal degree in co-relation 2605. Up to 66 conditions per place. [2023-08-25 08:23:01,024 INFO L82 GeneralOperation]: Start removeDead. Operand has 2435 places, 2498 transitions, 7300 flow [2023-08-25 08:23:01,050 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1628 places, 1629 transitions, 4413 flow [2023-08-25 08:23:01,050 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:23:01,050 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1628 places, 1629 transitions, 4413 flow [2023-08-25 08:23:01,050 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1628 places, 1629 transitions, 4413 flow [2023-08-25 08:23:01,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1628 places, 1629 transitions, 4413 flow [2023-08-25 08:23:02,216 INFO L124 PetriNetUnfolderBase]: 101/2011 cut-off events. [2023-08-25 08:23:02,217 INFO L125 PetriNetUnfolderBase]: For 5952/5952 co-relation queries the response was YES. [2023-08-25 08:23:02,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2639 conditions, 2011 events. 101/2011 cut-off events. For 5952/5952 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 9592 event pairs, 0 based on Foata normal form. 0/1486 useless extension candidates. Maximal degree in co-relation 2584. Up to 66 conditions per place. [2023-08-25 08:23:03,127 INFO L119 LiptonReduction]: Number of co-enabled transitions 2458602 [2023-08-25 08:23:08,739 INFO L134 LiptonReduction]: Checked pairs total: 14137935 [2023-08-25 08:23:08,739 INFO L136 LiptonReduction]: Total number of compositions: 616 [2023-08-25 08:23:08,741 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:23:08,741 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:23:08,741 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:23:09,219 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:23:09,219 INFO L124 PetriNetUnfolderBase]: 29/1241 cut-off events. [2023-08-25 08:23:09,219 INFO L125 PetriNetUnfolderBase]: For 5952/5952 co-relation queries the response was YES. [2023-08-25 08:23:09,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:23:09,220 INFO L208 CegarLoopForPetriNet]: trace histogram [33, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:23:09,220 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:23:09,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:23:09,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1612360179, now seen corresponding path program 1 times [2023-08-25 08:23:09,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:23:09,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837320920] [2023-08-25 08:23:09,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:23:09,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:23:09,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:23:09,266 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:23:09,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:23:09,318 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:23:09,318 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:23:09,318 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:23:09,318 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:23:09,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-08-25 08:23:09,319 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:23:09,319 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:23:09,319 WARN L233 ceAbstractionStarter]: 32 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:23:09,319 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 33 thread instances. [2023-08-25 08:23:09,483 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:23:09,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2510 places, 2575 transitions, 7592 flow [2023-08-25 08:23:11,106 INFO L124 PetriNetUnfolderBase]: 104/2072 cut-off events. [2023-08-25 08:23:11,106 INFO L125 PetriNetUnfolderBase]: For 6512/6512 co-relation queries the response was YES. [2023-08-25 08:23:11,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2768 conditions, 2072 events. 104/2072 cut-off events. For 6512/6512 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 9864 event pairs, 0 based on Foata normal form. 0/1531 useless extension candidates. Maximal degree in co-relation 2701. Up to 68 conditions per place. [2023-08-25 08:23:11,206 INFO L82 GeneralOperation]: Start removeDead. Operand has 2510 places, 2575 transitions, 7592 flow [2023-08-25 08:23:11,221 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1677 places, 1678 transitions, 4580 flow [2023-08-25 08:23:11,221 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:23:11,221 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1677 places, 1678 transitions, 4580 flow [2023-08-25 08:23:11,221 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1677 places, 1678 transitions, 4580 flow [2023-08-25 08:23:11,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1677 places, 1678 transitions, 4580 flow [2023-08-25 08:23:12,435 INFO L124 PetriNetUnfolderBase]: 104/2072 cut-off events. [2023-08-25 08:23:12,435 INFO L125 PetriNetUnfolderBase]: For 6512/6512 co-relation queries the response was YES. [2023-08-25 08:23:12,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2736 conditions, 2072 events. 104/2072 cut-off events. For 6512/6512 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 9864 event pairs, 0 based on Foata normal form. 0/1531 useless extension candidates. Maximal degree in co-relation 2680. Up to 68 conditions per place. [2023-08-25 08:23:13,113 INFO L119 LiptonReduction]: Number of co-enabled transitions 2613024 [2023-08-25 08:23:19,123 INFO L134 LiptonReduction]: Checked pairs total: 15103111 [2023-08-25 08:23:19,123 INFO L136 LiptonReduction]: Total number of compositions: 643 [2023-08-25 08:23:19,124 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:23:19,124 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:23:19,124 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:23:19,621 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:23:19,621 INFO L124 PetriNetUnfolderBase]: 30/1285 cut-off events. [2023-08-25 08:23:19,621 INFO L125 PetriNetUnfolderBase]: For 6512/6512 co-relation queries the response was YES. [2023-08-25 08:23:19,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:23:19,621 INFO L208 CegarLoopForPetriNet]: trace histogram [34, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:23:19,621 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:23:19,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:23:19,621 INFO L85 PathProgramCache]: Analyzing trace with hash -801998428, now seen corresponding path program 1 times [2023-08-25 08:23:19,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:23:19,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096894629] [2023-08-25 08:23:19,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:23:19,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:23:19,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:23:19,677 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:23:19,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:23:19,736 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:23:19,736 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:23:19,736 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:23:19,736 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:23:19,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-08-25 08:23:19,737 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:23:19,737 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:23:19,737 WARN L233 ceAbstractionStarter]: 33 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:23:19,737 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 34 thread instances. [2023-08-25 08:23:19,891 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:23:19,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2585 places, 2652 transitions, 7888 flow [2023-08-25 08:23:21,273 INFO L124 PetriNetUnfolderBase]: 107/2133 cut-off events. [2023-08-25 08:23:21,273 INFO L125 PetriNetUnfolderBase]: For 7106/7106 co-relation queries the response was YES. [2023-08-25 08:23:21,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2867 conditions, 2133 events. 107/2133 cut-off events. For 7106/7106 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 10161 event pairs, 0 based on Foata normal form. 0/1576 useless extension candidates. Maximal degree in co-relation 2798. Up to 70 conditions per place. [2023-08-25 08:23:21,443 INFO L82 GeneralOperation]: Start removeDead. Operand has 2585 places, 2652 transitions, 7888 flow [2023-08-25 08:23:21,476 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1726 places, 1727 transitions, 4749 flow [2023-08-25 08:23:21,476 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:23:21,476 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1726 places, 1727 transitions, 4749 flow [2023-08-25 08:23:21,477 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1726 places, 1727 transitions, 4749 flow [2023-08-25 08:23:21,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1726 places, 1727 transitions, 4749 flow [2023-08-25 08:23:22,781 INFO L124 PetriNetUnfolderBase]: 107/2133 cut-off events. [2023-08-25 08:23:22,782 INFO L125 PetriNetUnfolderBase]: For 7106/7106 co-relation queries the response was YES. [2023-08-25 08:23:22,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2834 conditions, 2133 events. 107/2133 cut-off events. For 7106/7106 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 10158 event pairs, 0 based on Foata normal form. 0/1576 useless extension candidates. Maximal degree in co-relation 2777. Up to 70 conditions per place. [2023-08-25 08:23:23,506 INFO L119 LiptonReduction]: Number of co-enabled transitions 2772150 [2023-08-25 08:23:29,783 INFO L134 LiptonReduction]: Checked pairs total: 16085715 [2023-08-25 08:23:29,783 INFO L136 LiptonReduction]: Total number of compositions: 652 [2023-08-25 08:23:29,785 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:23:29,785 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:23:29,785 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:23:30,326 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:23:30,326 INFO L124 PetriNetUnfolderBase]: 31/1326 cut-off events. [2023-08-25 08:23:30,326 INFO L125 PetriNetUnfolderBase]: For 7106/7106 co-relation queries the response was YES. [2023-08-25 08:23:30,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:23:30,327 INFO L208 CegarLoopForPetriNet]: trace histogram [35, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:23:30,327 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:23:30,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:23:30,327 INFO L85 PathProgramCache]: Analyzing trace with hash -993849753, now seen corresponding path program 1 times [2023-08-25 08:23:30,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:23:30,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578289630] [2023-08-25 08:23:30,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:23:30,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:23:30,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:23:30,378 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:23:30,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:23:30,436 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:23:30,436 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:23:30,436 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:23:30,437 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:23:30,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-08-25 08:23:30,437 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:23:30,437 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:23:30,437 WARN L233 ceAbstractionStarter]: 34 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:23:30,437 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 35 thread instances. [2023-08-25 08:23:30,662 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:23:30,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2660 places, 2729 transitions, 8188 flow [2023-08-25 08:23:32,161 INFO L124 PetriNetUnfolderBase]: 110/2194 cut-off events. [2023-08-25 08:23:32,161 INFO L125 PetriNetUnfolderBase]: For 7735/7735 co-relation queries the response was YES. [2023-08-25 08:23:32,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2967 conditions, 2194 events. 110/2194 cut-off events. For 7735/7735 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 10464 event pairs, 0 based on Foata normal form. 0/1621 useless extension candidates. Maximal degree in co-relation 2896. Up to 72 conditions per place. [2023-08-25 08:23:32,339 INFO L82 GeneralOperation]: Start removeDead. Operand has 2660 places, 2729 transitions, 8188 flow [2023-08-25 08:23:32,373 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1775 places, 1776 transitions, 4920 flow [2023-08-25 08:23:32,374 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:23:32,374 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1775 places, 1776 transitions, 4920 flow [2023-08-25 08:23:32,374 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1775 places, 1776 transitions, 4920 flow [2023-08-25 08:23:32,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1775 places, 1776 transitions, 4920 flow [2023-08-25 08:23:33,949 INFO L124 PetriNetUnfolderBase]: 110/2194 cut-off events. [2023-08-25 08:23:33,949 INFO L125 PetriNetUnfolderBase]: For 7735/7735 co-relation queries the response was YES. [2023-08-25 08:23:34,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2933 conditions, 2194 events. 110/2194 cut-off events. For 7735/7735 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 10449 event pairs, 0 based on Foata normal form. 0/1621 useless extension candidates. Maximal degree in co-relation 2875. Up to 72 conditions per place. [2023-08-25 08:23:34,524 INFO L119 LiptonReduction]: Number of co-enabled transitions 2935980 [2023-08-25 08:23:41,159 INFO L134 LiptonReduction]: Checked pairs total: 19710127 [2023-08-25 08:23:41,160 INFO L136 LiptonReduction]: Total number of compositions: 673 [2023-08-25 08:23:41,161 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:23:41,161 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:23:41,161 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:23:41,873 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:23:41,873 INFO L124 PetriNetUnfolderBase]: 31/1365 cut-off events. [2023-08-25 08:23:41,873 INFO L125 PetriNetUnfolderBase]: For 7735/7735 co-relation queries the response was YES. [2023-08-25 08:23:41,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:23:41,873 INFO L208 CegarLoopForPetriNet]: trace histogram [36, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:23:41,874 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:23:41,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:23:41,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1965294810, now seen corresponding path program 1 times [2023-08-25 08:23:41,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:23:41,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869007823] [2023-08-25 08:23:41,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:23:41,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:23:41,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:23:41,925 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:23:41,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:23:41,986 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:23:41,986 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:23:41,986 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:23:41,986 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:23:41,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-08-25 08:23:41,986 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:23:41,986 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:23:41,987 WARN L233 ceAbstractionStarter]: 35 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:23:41,987 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 36 thread instances. [2023-08-25 08:23:42,177 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:23:42,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2735 places, 2806 transitions, 8492 flow [2023-08-25 08:23:43,972 INFO L124 PetriNetUnfolderBase]: 113/2255 cut-off events. [2023-08-25 08:23:43,972 INFO L125 PetriNetUnfolderBase]: For 8400/8400 co-relation queries the response was YES. [2023-08-25 08:23:44,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3068 conditions, 2255 events. 113/2255 cut-off events. For 8400/8400 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 10718 event pairs, 0 based on Foata normal form. 0/1666 useless extension candidates. Maximal degree in co-relation 2995. Up to 74 conditions per place. [2023-08-25 08:23:44,293 INFO L82 GeneralOperation]: Start removeDead. Operand has 2735 places, 2806 transitions, 8492 flow [2023-08-25 08:23:44,316 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1824 places, 1825 transitions, 5093 flow [2023-08-25 08:23:44,316 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:23:44,316 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1824 places, 1825 transitions, 5093 flow [2023-08-25 08:23:44,316 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1824 places, 1825 transitions, 5093 flow [2023-08-25 08:23:44,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1824 places, 1825 transitions, 5093 flow [2023-08-25 08:23:45,890 INFO L124 PetriNetUnfolderBase]: 113/2255 cut-off events. [2023-08-25 08:23:45,890 INFO L125 PetriNetUnfolderBase]: For 8400/8400 co-relation queries the response was YES. [2023-08-25 08:23:46,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3033 conditions, 2255 events. 113/2255 cut-off events. For 8400/8400 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 10739 event pairs, 0 based on Foata normal form. 0/1666 useless extension candidates. Maximal degree in co-relation 2974. Up to 74 conditions per place. [2023-08-25 08:23:46,702 INFO L119 LiptonReduction]: Number of co-enabled transitions 3104514 [2023-08-25 08:23:53,701 INFO L134 LiptonReduction]: Checked pairs total: 20955790 [2023-08-25 08:23:53,701 INFO L136 LiptonReduction]: Total number of compositions: 698 [2023-08-25 08:23:53,702 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:23:53,703 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:23:53,703 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:23:54,464 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:23:54,464 INFO L124 PetriNetUnfolderBase]: 33/1406 cut-off events. [2023-08-25 08:23:54,464 INFO L125 PetriNetUnfolderBase]: For 8400/8400 co-relation queries the response was YES. [2023-08-25 08:23:54,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:23:54,464 INFO L208 CegarLoopForPetriNet]: trace histogram [37, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:23:54,464 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:23:54,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:23:54,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1652277100, now seen corresponding path program 1 times [2023-08-25 08:23:54,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:23:54,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673856030] [2023-08-25 08:23:54,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:23:54,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:23:54,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:23:54,520 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:23:54,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:23:54,586 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:23:54,586 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:23:54,586 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:23:54,586 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:23:54,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-08-25 08:23:54,587 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:23:54,587 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:23:54,587 WARN L233 ceAbstractionStarter]: 36 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:23:54,587 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 37 thread instances. [2023-08-25 08:23:54,843 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:23:54,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2810 places, 2883 transitions, 8800 flow [2023-08-25 08:23:56,710 INFO L124 PetriNetUnfolderBase]: 116/2316 cut-off events. [2023-08-25 08:23:56,710 INFO L125 PetriNetUnfolderBase]: For 9102/9102 co-relation queries the response was YES. [2023-08-25 08:23:56,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3170 conditions, 2316 events. 116/2316 cut-off events. For 9102/9102 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 11055 event pairs, 0 based on Foata normal form. 0/1711 useless extension candidates. Maximal degree in co-relation 3095. Up to 76 conditions per place. [2023-08-25 08:23:56,824 INFO L82 GeneralOperation]: Start removeDead. Operand has 2810 places, 2883 transitions, 8800 flow [2023-08-25 08:23:56,842 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1873 places, 1874 transitions, 5268 flow [2023-08-25 08:23:56,842 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:23:56,842 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1873 places, 1874 transitions, 5268 flow [2023-08-25 08:23:56,842 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1873 places, 1874 transitions, 5268 flow [2023-08-25 08:23:56,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1873 places, 1874 transitions, 5268 flow [2023-08-25 08:23:58,575 INFO L124 PetriNetUnfolderBase]: 116/2316 cut-off events. [2023-08-25 08:23:58,575 INFO L125 PetriNetUnfolderBase]: For 9102/9102 co-relation queries the response was YES. [2023-08-25 08:23:58,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3134 conditions, 2316 events. 116/2316 cut-off events. For 9102/9102 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 11063 event pairs, 0 based on Foata normal form. 0/1711 useless extension candidates. Maximal degree in co-relation 3074. Up to 76 conditions per place. [2023-08-25 08:23:59,388 INFO L119 LiptonReduction]: Number of co-enabled transitions 3277752 [2023-08-25 08:24:06,605 INFO L134 LiptonReduction]: Checked pairs total: 18949344 [2023-08-25 08:24:06,605 INFO L136 LiptonReduction]: Total number of compositions: 715 [2023-08-25 08:24:06,606 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:24:06,606 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:24:06,606 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:24:07,302 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:24:07,302 INFO L124 PetriNetUnfolderBase]: 34/1446 cut-off events. [2023-08-25 08:24:07,302 INFO L125 PetriNetUnfolderBase]: For 9102/9102 co-relation queries the response was YES. [2023-08-25 08:24:07,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:24:07,302 INFO L208 CegarLoopForPetriNet]: trace histogram [38, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:24:07,302 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:24:07,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:24:07,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1889329661, now seen corresponding path program 1 times [2023-08-25 08:24:07,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:24:07,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72295436] [2023-08-25 08:24:07,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:24:07,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:24:07,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:24:07,366 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:24:07,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:24:07,436 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:24:07,436 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:24:07,437 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:24:07,437 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:24:07,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-08-25 08:24:07,437 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:24:07,437 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:24:07,437 WARN L233 ceAbstractionStarter]: 37 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:24:07,437 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 38 thread instances. [2023-08-25 08:24:07,639 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:24:07,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2885 places, 2960 transitions, 9112 flow [2023-08-25 08:24:09,525 INFO L124 PetriNetUnfolderBase]: 119/2377 cut-off events. [2023-08-25 08:24:09,525 INFO L125 PetriNetUnfolderBase]: For 9842/9842 co-relation queries the response was YES. [2023-08-25 08:24:09,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3273 conditions, 2377 events. 119/2377 cut-off events. For 9842/9842 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 11363 event pairs, 0 based on Foata normal form. 0/1756 useless extension candidates. Maximal degree in co-relation 3196. Up to 78 conditions per place. [2023-08-25 08:24:09,671 INFO L82 GeneralOperation]: Start removeDead. Operand has 2885 places, 2960 transitions, 9112 flow [2023-08-25 08:24:09,693 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1922 places, 1923 transitions, 5445 flow [2023-08-25 08:24:09,693 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:24:09,693 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1922 places, 1923 transitions, 5445 flow [2023-08-25 08:24:09,693 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1922 places, 1923 transitions, 5445 flow [2023-08-25 08:24:09,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1922 places, 1923 transitions, 5445 flow [2023-08-25 08:24:11,569 INFO L124 PetriNetUnfolderBase]: 119/2377 cut-off events. [2023-08-25 08:24:11,569 INFO L125 PetriNetUnfolderBase]: For 9842/9842 co-relation queries the response was YES. [2023-08-25 08:24:11,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3236 conditions, 2377 events. 119/2377 cut-off events. For 9842/9842 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 11351 event pairs, 0 based on Foata normal form. 0/1756 useless extension candidates. Maximal degree in co-relation 3175. Up to 78 conditions per place. [2023-08-25 08:24:12,480 INFO L119 LiptonReduction]: Number of co-enabled transitions 3455694 [2023-08-25 08:24:19,729 INFO L134 LiptonReduction]: Checked pairs total: 23391623 [2023-08-25 08:24:19,730 INFO L136 LiptonReduction]: Total number of compositions: 724 [2023-08-25 08:24:19,731 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:24:19,731 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:24:19,731 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:24:20,450 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:24:20,450 INFO L124 PetriNetUnfolderBase]: 35/1487 cut-off events. [2023-08-25 08:24:20,450 INFO L125 PetriNetUnfolderBase]: For 9842/9842 co-relation queries the response was YES. [2023-08-25 08:24:20,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:24:20,450 INFO L208 CegarLoopForPetriNet]: trace histogram [39, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:24:20,450 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:24:20,450 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:24:20,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1426448427, now seen corresponding path program 1 times [2023-08-25 08:24:20,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:24:20,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909333348] [2023-08-25 08:24:20,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:24:20,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:24:20,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:24:20,506 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:24:20,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:24:20,578 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:24:20,578 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:24:20,579 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:24:20,579 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:24:20,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-08-25 08:24:20,579 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:24:20,579 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:24:20,579 WARN L233 ceAbstractionStarter]: 38 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:24:20,579 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 39 thread instances. [2023-08-25 08:24:20,831 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:24:20,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2960 places, 3037 transitions, 9428 flow [2023-08-25 08:24:22,894 INFO L124 PetriNetUnfolderBase]: 122/2438 cut-off events. [2023-08-25 08:24:22,894 INFO L125 PetriNetUnfolderBase]: For 10621/10621 co-relation queries the response was YES. [2023-08-25 08:24:23,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3377 conditions, 2438 events. 122/2438 cut-off events. For 10621/10621 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 11782 event pairs, 0 based on Foata normal form. 0/1801 useless extension candidates. Maximal degree in co-relation 3298. Up to 80 conditions per place. [2023-08-25 08:24:23,047 INFO L82 GeneralOperation]: Start removeDead. Operand has 2960 places, 3037 transitions, 9428 flow [2023-08-25 08:24:23,067 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1971 places, 1972 transitions, 5624 flow [2023-08-25 08:24:23,068 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:24:23,068 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1971 places, 1972 transitions, 5624 flow [2023-08-25 08:24:23,068 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1971 places, 1972 transitions, 5624 flow [2023-08-25 08:24:23,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1971 places, 1972 transitions, 5624 flow [2023-08-25 08:24:25,018 INFO L124 PetriNetUnfolderBase]: 122/2438 cut-off events. [2023-08-25 08:24:25,018 INFO L125 PetriNetUnfolderBase]: For 10621/10621 co-relation queries the response was YES. [2023-08-25 08:24:25,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3339 conditions, 2438 events. 122/2438 cut-off events. For 10621/10621 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 11687 event pairs, 0 based on Foata normal form. 0/1801 useless extension candidates. Maximal degree in co-relation 3277. Up to 80 conditions per place. [2023-08-25 08:24:25,962 INFO L119 LiptonReduction]: Number of co-enabled transitions 3638340 [2023-08-25 08:24:33,412 INFO L134 LiptonReduction]: Checked pairs total: 21067496 [2023-08-25 08:24:33,412 INFO L136 LiptonReduction]: Total number of compositions: 751 [2023-08-25 08:24:33,413 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:24:33,413 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:24:33,413 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:24:34,424 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:24:34,424 INFO L124 PetriNetUnfolderBase]: 36/1530 cut-off events. [2023-08-25 08:24:34,424 INFO L125 PetriNetUnfolderBase]: For 10621/10621 co-relation queries the response was YES. [2023-08-25 08:24:34,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:24:34,424 INFO L208 CegarLoopForPetriNet]: trace histogram [40, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:24:34,425 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:24:34,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:24:34,425 INFO L85 PathProgramCache]: Analyzing trace with hash 637471853, now seen corresponding path program 1 times [2023-08-25 08:24:34,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:24:34,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755098839] [2023-08-25 08:24:34,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:24:34,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:24:34,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:24:34,494 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:24:34,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:24:34,576 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:24:34,577 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:24:34,577 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:24:34,577 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:24:34,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-08-25 08:24:34,577 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:24:34,578 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:24:34,578 WARN L233 ceAbstractionStarter]: 39 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:24:34,578 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 40 thread instances. [2023-08-25 08:24:34,786 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:24:34,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 3035 places, 3114 transitions, 9748 flow [2023-08-25 08:24:36,885 INFO L124 PetriNetUnfolderBase]: 125/2499 cut-off events. [2023-08-25 08:24:36,885 INFO L125 PetriNetUnfolderBase]: For 11440/11440 co-relation queries the response was YES. [2023-08-25 08:24:37,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3482 conditions, 2499 events. 125/2499 cut-off events. For 11440/11440 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 11940 event pairs, 0 based on Foata normal form. 0/1846 useless extension candidates. Maximal degree in co-relation 3401. Up to 82 conditions per place. [2023-08-25 08:24:37,026 INFO L82 GeneralOperation]: Start removeDead. Operand has 3035 places, 3114 transitions, 9748 flow [2023-08-25 08:24:37,045 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2020 places, 2021 transitions, 5805 flow [2023-08-25 08:24:37,045 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:24:37,045 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2020 places, 2021 transitions, 5805 flow [2023-08-25 08:24:37,045 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2020 places, 2021 transitions, 5805 flow [2023-08-25 08:24:37,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2020 places, 2021 transitions, 5805 flow [2023-08-25 08:24:39,214 INFO L124 PetriNetUnfolderBase]: 125/2499 cut-off events. [2023-08-25 08:24:39,214 INFO L125 PetriNetUnfolderBase]: For 11440/11440 co-relation queries the response was YES. [2023-08-25 08:24:39,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3443 conditions, 2499 events. 125/2499 cut-off events. For 11440/11440 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 11931 event pairs, 0 based on Foata normal form. 0/1846 useless extension candidates. Maximal degree in co-relation 3380. Up to 82 conditions per place. [2023-08-25 08:24:39,958 INFO L119 LiptonReduction]: Number of co-enabled transitions 3825690 [2023-08-25 08:24:47,722 INFO L134 LiptonReduction]: Checked pairs total: 22099035 [2023-08-25 08:24:47,722 INFO L136 LiptonReduction]: Total number of compositions: 756 [2023-08-25 08:24:47,723 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:24:47,723 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:24:47,723 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:24:48,678 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:24:48,678 INFO L124 PetriNetUnfolderBase]: 37/1570 cut-off events. [2023-08-25 08:24:48,678 INFO L125 PetriNetUnfolderBase]: For 11440/11440 co-relation queries the response was YES. [2023-08-25 08:24:48,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:24:48,679 INFO L208 CegarLoopForPetriNet]: trace histogram [41, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:24:48,679 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:24:48,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:24:48,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1540631108, now seen corresponding path program 1 times [2023-08-25 08:24:48,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:24:48,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107081181] [2023-08-25 08:24:48,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:24:48,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:24:48,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:24:48,740 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:24:48,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:24:48,818 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:24:48,818 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:24:48,818 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:24:48,818 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:24:48,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-08-25 08:24:48,818 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:24:48,818 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:24:48,819 WARN L233 ceAbstractionStarter]: 40 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:24:48,819 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 41 thread instances. [2023-08-25 08:24:48,999 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:24:49,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 3110 places, 3191 transitions, 10072 flow [2023-08-25 08:24:51,256 INFO L124 PetriNetUnfolderBase]: 128/2560 cut-off events. [2023-08-25 08:24:51,256 INFO L125 PetriNetUnfolderBase]: For 12300/12300 co-relation queries the response was YES. [2023-08-25 08:24:51,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3588 conditions, 2560 events. 128/2560 cut-off events. For 12300/12300 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 12305 event pairs, 0 based on Foata normal form. 0/1891 useless extension candidates. Maximal degree in co-relation 3505. Up to 84 conditions per place. [2023-08-25 08:24:51,403 INFO L82 GeneralOperation]: Start removeDead. Operand has 3110 places, 3191 transitions, 10072 flow [2023-08-25 08:24:51,423 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2069 places, 2070 transitions, 5988 flow [2023-08-25 08:24:51,423 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:24:51,423 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2069 places, 2070 transitions, 5988 flow [2023-08-25 08:24:51,424 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2069 places, 2070 transitions, 5988 flow [2023-08-25 08:24:51,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2069 places, 2070 transitions, 5988 flow [2023-08-25 08:24:53,465 INFO L124 PetriNetUnfolderBase]: 128/2560 cut-off events. [2023-08-25 08:24:53,465 INFO L125 PetriNetUnfolderBase]: For 12300/12300 co-relation queries the response was YES. [2023-08-25 08:24:53,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3548 conditions, 2560 events. 128/2560 cut-off events. For 12300/12300 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 12298 event pairs, 0 based on Foata normal form. 0/1891 useless extension candidates. Maximal degree in co-relation 3484. Up to 84 conditions per place. [2023-08-25 08:24:54,587 INFO L119 LiptonReduction]: Number of co-enabled transitions 4017744 [2023-08-25 08:25:02,755 INFO L134 LiptonReduction]: Checked pairs total: 23364946 [2023-08-25 08:25:02,755 INFO L136 LiptonReduction]: Total number of compositions: 781 [2023-08-25 08:25:02,756 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:25:02,756 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:25:02,756 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:25:03,874 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:25:03,875 INFO L124 PetriNetUnfolderBase]: 38/1614 cut-off events. [2023-08-25 08:25:03,875 INFO L125 PetriNetUnfolderBase]: For 12300/12300 co-relation queries the response was YES. [2023-08-25 08:25:03,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:25:03,875 INFO L208 CegarLoopForPetriNet]: trace histogram [42, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:25:03,875 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:25:03,875 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:25:03,875 INFO L85 PathProgramCache]: Analyzing trace with hash 2046064867, now seen corresponding path program 1 times [2023-08-25 08:25:03,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:25:03,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488605868] [2023-08-25 08:25:03,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:25:03,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:25:03,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:25:03,937 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:25:03,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:25:04,014 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:25:04,014 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:25:04,015 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:25:04,015 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:25:04,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2023-08-25 08:25:04,015 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:25:04,015 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:25:04,015 WARN L233 ceAbstractionStarter]: 41 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:25:04,015 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 42 thread instances. [2023-08-25 08:25:04,222 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:25:04,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 3185 places, 3268 transitions, 10400 flow [2023-08-25 08:25:06,623 INFO L124 PetriNetUnfolderBase]: 131/2621 cut-off events. [2023-08-25 08:25:06,623 INFO L125 PetriNetUnfolderBase]: For 13202/13202 co-relation queries the response was YES. [2023-08-25 08:25:06,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3695 conditions, 2621 events. 131/2621 cut-off events. For 13202/13202 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 12631 event pairs, 0 based on Foata normal form. 0/1936 useless extension candidates. Maximal degree in co-relation 3610. Up to 86 conditions per place. [2023-08-25 08:25:06,777 INFO L82 GeneralOperation]: Start removeDead. Operand has 3185 places, 3268 transitions, 10400 flow [2023-08-25 08:25:06,797 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2118 places, 2119 transitions, 6173 flow [2023-08-25 08:25:06,798 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:25:06,798 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2118 places, 2119 transitions, 6173 flow [2023-08-25 08:25:06,798 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2118 places, 2119 transitions, 6173 flow [2023-08-25 08:25:06,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2118 places, 2119 transitions, 6173 flow [2023-08-25 08:25:08,995 INFO L124 PetriNetUnfolderBase]: 131/2621 cut-off events. [2023-08-25 08:25:08,996 INFO L125 PetriNetUnfolderBase]: For 13202/13202 co-relation queries the response was YES. [2023-08-25 08:25:09,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3654 conditions, 2621 events. 131/2621 cut-off events. For 13202/13202 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 12614 event pairs, 0 based on Foata normal form. 0/1936 useless extension candidates. Maximal degree in co-relation 3589. Up to 86 conditions per place. [2023-08-25 08:25:10,050 INFO L119 LiptonReduction]: Number of co-enabled transitions 4214502 [2023-08-25 08:25:19,125 INFO L134 LiptonReduction]: Checked pairs total: 28544332 [2023-08-25 08:25:19,125 INFO L136 LiptonReduction]: Total number of compositions: 814 [2023-08-25 08:25:19,127 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:25:19,127 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:25:19,127 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:25:20,055 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:25:20,055 INFO L124 PetriNetUnfolderBase]: 38/1650 cut-off events. [2023-08-25 08:25:20,055 INFO L125 PetriNetUnfolderBase]: For 13202/13202 co-relation queries the response was YES. [2023-08-25 08:25:20,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:25:20,055 INFO L208 CegarLoopForPetriNet]: trace histogram [43, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:25:20,055 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:25:20,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:25:20,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1673811239, now seen corresponding path program 1 times [2023-08-25 08:25:20,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:25:20,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015578378] [2023-08-25 08:25:20,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:25:20,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:25:20,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:25:20,156 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:25:20,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:25:20,235 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:25:20,235 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:25:20,235 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:25:20,235 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:25:20,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2023-08-25 08:25:20,236 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:25:20,236 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:25:20,236 WARN L233 ceAbstractionStarter]: 42 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:25:20,236 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 43 thread instances. [2023-08-25 08:25:20,436 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:25:20,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 3260 places, 3345 transitions, 10732 flow [2023-08-25 08:25:22,744 INFO L124 PetriNetUnfolderBase]: 134/2682 cut-off events. [2023-08-25 08:25:22,744 INFO L125 PetriNetUnfolderBase]: For 14147/14147 co-relation queries the response was YES. [2023-08-25 08:25:22,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3803 conditions, 2682 events. 134/2682 cut-off events. For 14147/14147 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 12992 event pairs, 0 based on Foata normal form. 0/1981 useless extension candidates. Maximal degree in co-relation 3716. Up to 88 conditions per place. [2023-08-25 08:25:22,935 INFO L82 GeneralOperation]: Start removeDead. Operand has 3260 places, 3345 transitions, 10732 flow [2023-08-25 08:25:22,960 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2167 places, 2168 transitions, 6360 flow [2023-08-25 08:25:22,960 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:25:22,960 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2167 places, 2168 transitions, 6360 flow [2023-08-25 08:25:22,961 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2167 places, 2168 transitions, 6360 flow [2023-08-25 08:25:22,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2167 places, 2168 transitions, 6360 flow [2023-08-25 08:25:25,370 INFO L124 PetriNetUnfolderBase]: 134/2682 cut-off events. [2023-08-25 08:25:25,370 INFO L125 PetriNetUnfolderBase]: For 14147/14147 co-relation queries the response was YES. [2023-08-25 08:25:25,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3761 conditions, 2682 events. 134/2682 cut-off events. For 14147/14147 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 12985 event pairs, 0 based on Foata normal form. 0/1981 useless extension candidates. Maximal degree in co-relation 3695. Up to 88 conditions per place. [2023-08-25 08:25:26,489 INFO L119 LiptonReduction]: Number of co-enabled transitions 4415964 [2023-08-25 08:25:35,308 INFO L134 LiptonReduction]: Checked pairs total: 30000640 [2023-08-25 08:25:35,308 INFO L136 LiptonReduction]: Total number of compositions: 827 [2023-08-25 08:25:35,310 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:25:35,310 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:25:35,310 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:25:36,337 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:25:36,338 INFO L124 PetriNetUnfolderBase]: 40/1693 cut-off events. [2023-08-25 08:25:36,338 INFO L125 PetriNetUnfolderBase]: For 14147/14147 co-relation queries the response was YES. [2023-08-25 08:25:36,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:25:36,338 INFO L208 CegarLoopForPetriNet]: trace histogram [44, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:25:36,338 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:25:36,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:25:36,338 INFO L85 PathProgramCache]: Analyzing trace with hash -58490146, now seen corresponding path program 1 times [2023-08-25 08:25:36,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:25:36,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826690103] [2023-08-25 08:25:36,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:25:36,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:25:36,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:25:36,429 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:25:36,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:25:36,510 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:25:36,510 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:25:36,510 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:25:36,511 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:25:36,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2023-08-25 08:25:36,511 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:25:36,511 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:25:36,511 WARN L233 ceAbstractionStarter]: 43 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:25:36,511 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 44 thread instances. [2023-08-25 08:25:36,731 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:25:36,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 3335 places, 3422 transitions, 11068 flow [2023-08-25 08:25:39,477 INFO L124 PetriNetUnfolderBase]: 137/2743 cut-off events. [2023-08-25 08:25:39,477 INFO L125 PetriNetUnfolderBase]: For 15136/15136 co-relation queries the response was YES. [2023-08-25 08:25:39,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3912 conditions, 2743 events. 137/2743 cut-off events. For 15136/15136 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 13275 event pairs, 0 based on Foata normal form. 0/2026 useless extension candidates. Maximal degree in co-relation 3823. Up to 90 conditions per place. [2023-08-25 08:25:39,643 INFO L82 GeneralOperation]: Start removeDead. Operand has 3335 places, 3422 transitions, 11068 flow [2023-08-25 08:25:39,668 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2216 places, 2217 transitions, 6549 flow [2023-08-25 08:25:39,669 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:25:39,669 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2216 places, 2217 transitions, 6549 flow [2023-08-25 08:25:39,669 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2216 places, 2217 transitions, 6549 flow [2023-08-25 08:25:39,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2216 places, 2217 transitions, 6549 flow [2023-08-25 08:25:42,027 INFO L124 PetriNetUnfolderBase]: 137/2743 cut-off events. [2023-08-25 08:25:42,028 INFO L125 PetriNetUnfolderBase]: For 15136/15136 co-relation queries the response was YES. [2023-08-25 08:25:42,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3869 conditions, 2743 events. 137/2743 cut-off events. For 15136/15136 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 13268 event pairs, 0 based on Foata normal form. 0/2026 useless extension candidates. Maximal degree in co-relation 3802. Up to 90 conditions per place. [2023-08-25 08:25:43,204 INFO L119 LiptonReduction]: Number of co-enabled transitions 4622130 [2023-08-25 08:25:52,320 INFO L134 LiptonReduction]: Checked pairs total: 31285372 [2023-08-25 08:25:52,321 INFO L136 LiptonReduction]: Total number of compositions: 836 [2023-08-25 08:25:52,322 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:25:52,322 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:25:52,322 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:25:53,527 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:25:53,527 INFO L124 PetriNetUnfolderBase]: 41/1734 cut-off events. [2023-08-25 08:25:53,527 INFO L125 PetriNetUnfolderBase]: For 15136/15136 co-relation queries the response was YES. [2023-08-25 08:25:53,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:25:53,528 INFO L208 CegarLoopForPetriNet]: trace histogram [45, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:25:53,528 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:25:53,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:25:53,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1146283575, now seen corresponding path program 1 times [2023-08-25 08:25:53,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:25:53,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333937682] [2023-08-25 08:25:53,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:25:53,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:25:53,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:25:53,595 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:25:53,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:25:53,680 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:25:53,680 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:25:53,680 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:25:53,680 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:25:53,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2023-08-25 08:25:53,680 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:25:53,681 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:25:53,681 WARN L233 ceAbstractionStarter]: 44 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:25:53,681 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 45 thread instances. [2023-08-25 08:25:53,885 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:25:53,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 3410 places, 3499 transitions, 11408 flow [2023-08-25 08:25:56,528 INFO L124 PetriNetUnfolderBase]: 140/2804 cut-off events. [2023-08-25 08:25:56,529 INFO L125 PetriNetUnfolderBase]: For 16170/16170 co-relation queries the response was YES. [2023-08-25 08:25:56,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4022 conditions, 2804 events. 140/2804 cut-off events. For 16170/16170 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 13566 event pairs, 0 based on Foata normal form. 0/2071 useless extension candidates. Maximal degree in co-relation 3931. Up to 92 conditions per place. [2023-08-25 08:25:56,723 INFO L82 GeneralOperation]: Start removeDead. Operand has 3410 places, 3499 transitions, 11408 flow [2023-08-25 08:25:56,748 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2265 places, 2266 transitions, 6740 flow [2023-08-25 08:25:56,748 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:25:56,748 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2265 places, 2266 transitions, 6740 flow [2023-08-25 08:25:56,748 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2265 places, 2266 transitions, 6740 flow [2023-08-25 08:25:56,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2265 places, 2266 transitions, 6740 flow [2023-08-25 08:25:59,349 INFO L124 PetriNetUnfolderBase]: 140/2804 cut-off events. [2023-08-25 08:25:59,350 INFO L125 PetriNetUnfolderBase]: For 16170/16170 co-relation queries the response was YES. [2023-08-25 08:25:59,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3978 conditions, 2804 events. 140/2804 cut-off events. For 16170/16170 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 13653 event pairs, 0 based on Foata normal form. 0/2071 useless extension candidates. Maximal degree in co-relation 3910. Up to 92 conditions per place. [2023-08-25 08:26:00,573 INFO L119 LiptonReduction]: Number of co-enabled transitions 4833000 [2023-08-25 08:26:10,389 INFO L134 LiptonReduction]: Checked pairs total: 32721475 [2023-08-25 08:26:10,390 INFO L136 LiptonReduction]: Total number of compositions: 863 [2023-08-25 08:26:10,391 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:26:10,391 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:26:10,391 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:26:11,623 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:26:11,623 INFO L124 PetriNetUnfolderBase]: 42/1774 cut-off events. [2023-08-25 08:26:11,623 INFO L125 PetriNetUnfolderBase]: For 16170/16170 co-relation queries the response was YES. [2023-08-25 08:26:11,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:26:11,623 INFO L208 CegarLoopForPetriNet]: trace histogram [46, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:26:11,623 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:26:11,623 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:26:11,623 INFO L85 PathProgramCache]: Analyzing trace with hash -702160652, now seen corresponding path program 1 times [2023-08-25 08:26:11,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:26:11,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388732303] [2023-08-25 08:26:11,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:26:11,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:26:11,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:26:11,741 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:26:11,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:26:11,830 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:26:11,830 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:26:11,830 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:26:11,830 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:26:11,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2023-08-25 08:26:11,831 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:26:11,831 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:26:11,831 WARN L233 ceAbstractionStarter]: 45 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:26:11,831 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 46 thread instances. [2023-08-25 08:26:12,070 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:26:12,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 3485 places, 3576 transitions, 11752 flow [2023-08-25 08:26:14,857 INFO L124 PetriNetUnfolderBase]: 143/2865 cut-off events. [2023-08-25 08:26:14,858 INFO L125 PetriNetUnfolderBase]: For 17250/17250 co-relation queries the response was YES. [2023-08-25 08:26:15,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4133 conditions, 2865 events. 143/2865 cut-off events. For 17250/17250 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 13902 event pairs, 0 based on Foata normal form. 0/2116 useless extension candidates. Maximal degree in co-relation 4040. Up to 94 conditions per place. [2023-08-25 08:26:15,052 INFO L82 GeneralOperation]: Start removeDead. Operand has 3485 places, 3576 transitions, 11752 flow [2023-08-25 08:26:15,077 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2314 places, 2315 transitions, 6933 flow [2023-08-25 08:26:15,078 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:26:15,078 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2314 places, 2315 transitions, 6933 flow [2023-08-25 08:26:15,078 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2314 places, 2315 transitions, 6933 flow [2023-08-25 08:26:15,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2314 places, 2315 transitions, 6933 flow [2023-08-25 08:26:17,857 INFO L124 PetriNetUnfolderBase]: 143/2865 cut-off events. [2023-08-25 08:26:17,857 INFO L125 PetriNetUnfolderBase]: For 17250/17250 co-relation queries the response was YES. [2023-08-25 08:26:18,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4088 conditions, 2865 events. 143/2865 cut-off events. For 17250/17250 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 13898 event pairs, 0 based on Foata normal form. 0/2116 useless extension candidates. Maximal degree in co-relation 4019. Up to 94 conditions per place. [2023-08-25 08:26:19,163 INFO L119 LiptonReduction]: Number of co-enabled transitions 5048574 [2023-08-25 08:26:29,016 INFO L134 LiptonReduction]: Checked pairs total: 34252300 [2023-08-25 08:26:29,017 INFO L136 LiptonReduction]: Total number of compositions: 860 [2023-08-25 08:26:29,018 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:26:29,018 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:26:29,018 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:26:30,265 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:26:30,265 INFO L124 PetriNetUnfolderBase]: 42/1814 cut-off events. [2023-08-25 08:26:30,265 INFO L125 PetriNetUnfolderBase]: For 17250/17250 co-relation queries the response was YES. [2023-08-25 08:26:30,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:26:30,265 INFO L208 CegarLoopForPetriNet]: trace histogram [47, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:26:30,265 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:26:30,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:26:30,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1186936500, now seen corresponding path program 1 times [2023-08-25 08:26:30,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:26:30,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337957353] [2023-08-25 08:26:30,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:26:30,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:26:30,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:26:30,376 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:26:30,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:26:30,467 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:26:30,467 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:26:30,467 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:26:30,467 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:26:30,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2023-08-25 08:26:30,467 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:26:30,468 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:26:30,468 WARN L233 ceAbstractionStarter]: 46 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:26:30,468 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 47 thread instances. [2023-08-25 08:26:30,674 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:26:30,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 3560 places, 3653 transitions, 12100 flow [2023-08-25 08:26:33,609 INFO L124 PetriNetUnfolderBase]: 146/2926 cut-off events. [2023-08-25 08:26:33,610 INFO L125 PetriNetUnfolderBase]: For 18377/18377 co-relation queries the response was YES. [2023-08-25 08:26:33,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4245 conditions, 2926 events. 146/2926 cut-off events. For 18377/18377 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 14235 event pairs, 0 based on Foata normal form. 0/2161 useless extension candidates. Maximal degree in co-relation 4150. Up to 96 conditions per place. [2023-08-25 08:26:33,822 INFO L82 GeneralOperation]: Start removeDead. Operand has 3560 places, 3653 transitions, 12100 flow [2023-08-25 08:26:33,850 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2363 places, 2364 transitions, 7128 flow [2023-08-25 08:26:33,850 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:26:33,850 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2363 places, 2364 transitions, 7128 flow [2023-08-25 08:26:33,850 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2363 places, 2364 transitions, 7128 flow [2023-08-25 08:26:33,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2363 places, 2364 transitions, 7128 flow [2023-08-25 08:26:36,765 INFO L124 PetriNetUnfolderBase]: 146/2926 cut-off events. [2023-08-25 08:26:36,765 INFO L125 PetriNetUnfolderBase]: For 18377/18377 co-relation queries the response was YES. [2023-08-25 08:26:36,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4199 conditions, 2926 events. 146/2926 cut-off events. For 18377/18377 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 14233 event pairs, 0 based on Foata normal form. 0/2161 useless extension candidates. Maximal degree in co-relation 4129. Up to 96 conditions per place. [2023-08-25 08:26:38,139 INFO L119 LiptonReduction]: Number of co-enabled transitions 5268852 [2023-08-25 08:26:48,826 INFO L134 LiptonReduction]: Checked pairs total: 30514837 [2023-08-25 08:26:48,826 INFO L136 LiptonReduction]: Total number of compositions: 895 [2023-08-25 08:26:48,828 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:26:48,828 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:26:48,828 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:26:50,280 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:26:50,280 INFO L124 PetriNetUnfolderBase]: 44/1856 cut-off events. [2023-08-25 08:26:50,280 INFO L125 PetriNetUnfolderBase]: For 18377/18377 co-relation queries the response was YES. [2023-08-25 08:26:50,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:26:50,280 INFO L208 CegarLoopForPetriNet]: trace histogram [48, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:26:50,280 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:26:50,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:26:50,280 INFO L85 PathProgramCache]: Analyzing trace with hash 635730042, now seen corresponding path program 1 times [2023-08-25 08:26:50,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:26:50,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264903042] [2023-08-25 08:26:50,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:26:50,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:26:50,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:26:50,360 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:26:50,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:26:50,457 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:26:50,458 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:26:50,458 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:26:50,458 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:26:50,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2023-08-25 08:26:50,458 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:26:50,458 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:26:50,458 WARN L233 ceAbstractionStarter]: 47 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:26:50,459 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 48 thread instances. [2023-08-25 08:26:50,680 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:26:50,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 3635 places, 3730 transitions, 12452 flow [2023-08-25 08:26:54,249 INFO L124 PetriNetUnfolderBase]: 149/2987 cut-off events. [2023-08-25 08:26:54,249 INFO L125 PetriNetUnfolderBase]: For 19552/19552 co-relation queries the response was YES. [2023-08-25 08:26:54,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4358 conditions, 2987 events. 149/2987 cut-off events. For 19552/19552 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 14493 event pairs, 0 based on Foata normal form. 0/2206 useless extension candidates. Maximal degree in co-relation 4261. Up to 98 conditions per place. [2023-08-25 08:26:54,597 INFO L82 GeneralOperation]: Start removeDead. Operand has 3635 places, 3730 transitions, 12452 flow [2023-08-25 08:26:54,647 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2412 places, 2413 transitions, 7325 flow [2023-08-25 08:26:54,647 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:26:54,647 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2412 places, 2413 transitions, 7325 flow [2023-08-25 08:26:54,648 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2412 places, 2413 transitions, 7325 flow [2023-08-25 08:26:54,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2412 places, 2413 transitions, 7325 flow [2023-08-25 08:26:58,278 INFO L124 PetriNetUnfolderBase]: 149/2987 cut-off events. [2023-08-25 08:26:58,279 INFO L125 PetriNetUnfolderBase]: For 19552/19552 co-relation queries the response was YES. [2023-08-25 08:26:58,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4311 conditions, 2987 events. 149/2987 cut-off events. For 19552/19552 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 14517 event pairs, 0 based on Foata normal form. 0/2206 useless extension candidates. Maximal degree in co-relation 4240. Up to 98 conditions per place. [2023-08-25 08:26:59,680 INFO L119 LiptonReduction]: Number of co-enabled transitions 5493834 [2023-08-25 08:27:10,727 INFO L134 LiptonReduction]: Checked pairs total: 37153990 [2023-08-25 08:27:10,727 INFO L136 LiptonReduction]: Total number of compositions: 902 [2023-08-25 08:27:10,728 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:27:10,729 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:27:10,729 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:27:12,284 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:27:12,284 INFO L124 PetriNetUnfolderBase]: 44/1896 cut-off events. [2023-08-25 08:27:12,284 INFO L125 PetriNetUnfolderBase]: For 19552/19552 co-relation queries the response was YES. [2023-08-25 08:27:12,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:27:12,284 INFO L208 CegarLoopForPetriNet]: trace histogram [49, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:27:12,284 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:27:12,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:27:12,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1606847868, now seen corresponding path program 1 times [2023-08-25 08:27:12,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:27:12,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755790725] [2023-08-25 08:27:12,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:27:12,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:27:12,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:27:12,366 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:27:12,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:27:12,466 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:27:12,466 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:27:12,466 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:27:12,466 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:27:12,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2023-08-25 08:27:12,466 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:27:12,467 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:27:12,467 WARN L233 ceAbstractionStarter]: 48 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:27:12,467 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 49 thread instances. [2023-08-25 08:27:12,692 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:27:12,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 3710 places, 3807 transitions, 12808 flow [2023-08-25 08:27:15,866 INFO L124 PetriNetUnfolderBase]: 152/3048 cut-off events. [2023-08-25 08:27:15,867 INFO L125 PetriNetUnfolderBase]: For 20776/20776 co-relation queries the response was YES. [2023-08-25 08:27:16,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4472 conditions, 3048 events. 152/3048 cut-off events. For 20776/20776 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 14744 event pairs, 0 based on Foata normal form. 0/2251 useless extension candidates. Maximal degree in co-relation 4373. Up to 100 conditions per place. [2023-08-25 08:27:16,138 INFO L82 GeneralOperation]: Start removeDead. Operand has 3710 places, 3807 transitions, 12808 flow [2023-08-25 08:27:16,172 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2461 places, 2462 transitions, 7524 flow [2023-08-25 08:27:16,172 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:27:16,172 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2461 places, 2462 transitions, 7524 flow [2023-08-25 08:27:16,172 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2461 places, 2462 transitions, 7524 flow [2023-08-25 08:27:16,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2461 places, 2462 transitions, 7524 flow [2023-08-25 08:27:19,485 INFO L124 PetriNetUnfolderBase]: 152/3048 cut-off events. [2023-08-25 08:27:19,485 INFO L125 PetriNetUnfolderBase]: For 20776/20776 co-relation queries the response was YES. [2023-08-25 08:27:19,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4424 conditions, 3048 events. 152/3048 cut-off events. For 20776/20776 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 14753 event pairs, 0 based on Foata normal form. 0/2251 useless extension candidates. Maximal degree in co-relation 4352. Up to 100 conditions per place. [2023-08-25 08:27:20,911 INFO L119 LiptonReduction]: Number of co-enabled transitions 5723520 [2023-08-25 08:27:32,868 INFO L134 LiptonReduction]: Checked pairs total: 38890461 [2023-08-25 08:27:32,868 INFO L136 LiptonReduction]: Total number of compositions: 943 [2023-08-25 08:27:32,870 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:27:32,870 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:27:32,870 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:27:34,243 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:27:34,243 INFO L124 PetriNetUnfolderBase]: 45/1937 cut-off events. [2023-08-25 08:27:34,243 INFO L125 PetriNetUnfolderBase]: For 20776/20776 co-relation queries the response was YES. [2023-08-25 08:27:34,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:27:34,243 INFO L208 CegarLoopForPetriNet]: trace histogram [50, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:27:34,243 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:27:34,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:27:34,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1373790773, now seen corresponding path program 1 times [2023-08-25 08:27:34,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:27:34,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279279467] [2023-08-25 08:27:34,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:27:34,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:27:34,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:27:34,357 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:27:34,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:27:34,471 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:27:34,471 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:27:34,471 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:27:34,471 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:27:34,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2023-08-25 08:27:34,472 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:27:34,472 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:27:34,472 WARN L233 ceAbstractionStarter]: 49 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:27:34,472 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 50 thread instances. [2023-08-25 08:27:34,844 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:27:34,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 3785 places, 3884 transitions, 13168 flow [2023-08-25 08:27:38,170 INFO L124 PetriNetUnfolderBase]: 155/3109 cut-off events. [2023-08-25 08:27:38,171 INFO L125 PetriNetUnfolderBase]: For 22050/22050 co-relation queries the response was YES. [2023-08-25 08:27:38,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4587 conditions, 3109 events. 155/3109 cut-off events. For 22050/22050 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 15149 event pairs, 0 based on Foata normal form. 0/2296 useless extension candidates. Maximal degree in co-relation 4486. Up to 102 conditions per place. [2023-08-25 08:27:38,421 INFO L82 GeneralOperation]: Start removeDead. Operand has 3785 places, 3884 transitions, 13168 flow [2023-08-25 08:27:38,451 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2510 places, 2511 transitions, 7725 flow [2023-08-25 08:27:38,451 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:27:38,451 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2510 places, 2511 transitions, 7725 flow [2023-08-25 08:27:38,451 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2510 places, 2511 transitions, 7725 flow [2023-08-25 08:27:38,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2510 places, 2511 transitions, 7725 flow [2023-08-25 08:27:41,583 INFO L124 PetriNetUnfolderBase]: 155/3109 cut-off events. [2023-08-25 08:27:41,583 INFO L125 PetriNetUnfolderBase]: For 22050/22050 co-relation queries the response was YES. [2023-08-25 08:27:41,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4538 conditions, 3109 events. 155/3109 cut-off events. For 22050/22050 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 15149 event pairs, 0 based on Foata normal form. 0/2296 useless extension candidates. Maximal degree in co-relation 4465. Up to 102 conditions per place. [2023-08-25 08:27:43,070 INFO L119 LiptonReduction]: Number of co-enabled transitions 5957910 [2023-08-25 08:27:55,384 INFO L134 LiptonReduction]: Checked pairs total: 40303262 [2023-08-25 08:27:55,384 INFO L136 LiptonReduction]: Total number of compositions: 952 [2023-08-25 08:27:55,386 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:27:55,386 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:27:55,386 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:27:56,968 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:27:56,969 INFO L124 PetriNetUnfolderBase]: 46/1980 cut-off events. [2023-08-25 08:27:56,969 INFO L125 PetriNetUnfolderBase]: For 22050/22050 co-relation queries the response was YES. [2023-08-25 08:27:56,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:27:56,969 INFO L208 CegarLoopForPetriNet]: trace histogram [51, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:27:56,969 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:27:56,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:27:56,969 INFO L85 PathProgramCache]: Analyzing trace with hash 229310152, now seen corresponding path program 1 times [2023-08-25 08:27:56,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:27:56,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056034152] [2023-08-25 08:27:56,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:27:56,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:27:57,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:27:57,052 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:27:57,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:27:57,148 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:27:57,148 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:27:57,148 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:27:57,148 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:27:57,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2023-08-25 08:27:57,148 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:27:57,148 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:27:57,148 WARN L233 ceAbstractionStarter]: 50 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:27:57,148 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 51 thread instances. [2023-08-25 08:27:57,429 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:27:57,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 3860 places, 3961 transitions, 13532 flow [2023-08-25 08:28:00,997 INFO L124 PetriNetUnfolderBase]: 158/3170 cut-off events. [2023-08-25 08:28:00,997 INFO L125 PetriNetUnfolderBase]: For 23375/23375 co-relation queries the response was YES. [2023-08-25 08:28:01,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4703 conditions, 3170 events. 158/3170 cut-off events. For 23375/23375 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 15430 event pairs, 0 based on Foata normal form. 0/2341 useless extension candidates. Maximal degree in co-relation 4600. Up to 104 conditions per place. [2023-08-25 08:28:01,250 INFO L82 GeneralOperation]: Start removeDead. Operand has 3860 places, 3961 transitions, 13532 flow [2023-08-25 08:28:01,280 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2559 places, 2560 transitions, 7928 flow [2023-08-25 08:28:01,281 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:28:01,281 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2559 places, 2560 transitions, 7928 flow [2023-08-25 08:28:01,281 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2559 places, 2560 transitions, 7928 flow [2023-08-25 08:28:01,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2559 places, 2560 transitions, 7928 flow [2023-08-25 08:28:04,632 INFO L124 PetriNetUnfolderBase]: 158/3170 cut-off events. [2023-08-25 08:28:04,633 INFO L125 PetriNetUnfolderBase]: For 23375/23375 co-relation queries the response was YES. [2023-08-25 08:28:04,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4653 conditions, 3170 events. 158/3170 cut-off events. For 23375/23375 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 15415 event pairs, 0 based on Foata normal form. 0/2341 useless extension candidates. Maximal degree in co-relation 4579. Up to 104 conditions per place. [2023-08-25 08:28:06,203 INFO L119 LiptonReduction]: Number of co-enabled transitions 6197004 [2023-08-25 08:28:18,519 INFO L134 LiptonReduction]: Checked pairs total: 42011891 [2023-08-25 08:28:18,519 INFO L136 LiptonReduction]: Total number of compositions: 961 [2023-08-25 08:28:18,521 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:28:18,521 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:28:18,521 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:28:20,019 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:28:20,019 INFO L124 PetriNetUnfolderBase]: 48/2023 cut-off events. [2023-08-25 08:28:20,019 INFO L125 PetriNetUnfolderBase]: For 23375/23375 co-relation queries the response was YES. [2023-08-25 08:28:20,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:28:20,019 INFO L208 CegarLoopForPetriNet]: trace histogram [52, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:28:20,020 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:28:20,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:28:20,020 INFO L85 PathProgramCache]: Analyzing trace with hash 423965017, now seen corresponding path program 1 times [2023-08-25 08:28:20,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:28:20,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849903139] [2023-08-25 08:28:20,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:28:20,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:28:20,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:28:20,193 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:28:20,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:28:20,314 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:28:20,314 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:28:20,314 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:28:20,314 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:28:20,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2023-08-25 08:28:20,315 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:28:20,315 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:28:20,315 WARN L233 ceAbstractionStarter]: 51 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:28:20,315 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 52 thread instances. [2023-08-25 08:28:20,556 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:28:20,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 3935 places, 4038 transitions, 13900 flow [2023-08-25 08:28:24,697 INFO L124 PetriNetUnfolderBase]: 161/3231 cut-off events. [2023-08-25 08:28:24,698 INFO L125 PetriNetUnfolderBase]: For 24752/24752 co-relation queries the response was YES. [2023-08-25 08:28:25,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4820 conditions, 3231 events. 161/3231 cut-off events. For 24752/24752 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 15748 event pairs, 0 based on Foata normal form. 0/2386 useless extension candidates. Maximal degree in co-relation 4715. Up to 106 conditions per place. [2023-08-25 08:28:25,290 INFO L82 GeneralOperation]: Start removeDead. Operand has 3935 places, 4038 transitions, 13900 flow [2023-08-25 08:28:25,337 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2608 places, 2609 transitions, 8133 flow [2023-08-25 08:28:25,337 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:28:25,338 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2608 places, 2609 transitions, 8133 flow [2023-08-25 08:28:25,338 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2608 places, 2609 transitions, 8133 flow [2023-08-25 08:28:25,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2608 places, 2609 transitions, 8133 flow [2023-08-25 08:28:29,276 INFO L124 PetriNetUnfolderBase]: 161/3231 cut-off events. [2023-08-25 08:28:29,276 INFO L125 PetriNetUnfolderBase]: For 24752/24752 co-relation queries the response was YES. [2023-08-25 08:28:29,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4769 conditions, 3231 events. 161/3231 cut-off events. For 24752/24752 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 15758 event pairs, 0 based on Foata normal form. 0/2386 useless extension candidates. Maximal degree in co-relation 4694. Up to 106 conditions per place. [2023-08-25 08:28:30,899 INFO L119 LiptonReduction]: Number of co-enabled transitions 6440802 [2023-08-25 08:28:44,469 INFO L134 LiptonReduction]: Checked pairs total: 37465518 [2023-08-25 08:28:44,470 INFO L136 LiptonReduction]: Total number of compositions: 980 [2023-08-25 08:28:44,471 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:28:44,471 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:28:44,471 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:28:46,264 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:28:46,265 INFO L124 PetriNetUnfolderBase]: 49/2062 cut-off events. [2023-08-25 08:28:46,265 INFO L125 PetriNetUnfolderBase]: For 24752/24752 co-relation queries the response was YES. [2023-08-25 08:28:46,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:28:46,265 INFO L208 CegarLoopForPetriNet]: trace histogram [53, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:28:46,265 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:28:46,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:28:46,265 INFO L85 PathProgramCache]: Analyzing trace with hash -833106475, now seen corresponding path program 1 times [2023-08-25 08:28:46,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:28:46,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401480004] [2023-08-25 08:28:46,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:28:46,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:28:46,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:28:46,373 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:28:46,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:28:46,507 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:28:46,507 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:28:46,507 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:28:46,507 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:28:46,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2023-08-25 08:28:46,508 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:28:46,508 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:28:46,508 WARN L233 ceAbstractionStarter]: 52 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:28:46,508 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 53 thread instances. [2023-08-25 08:28:46,766 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:28:46,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 4010 places, 4115 transitions, 14272 flow [2023-08-25 08:28:50,611 INFO L124 PetriNetUnfolderBase]: 164/3292 cut-off events. [2023-08-25 08:28:50,611 INFO L125 PetriNetUnfolderBase]: For 26182/26182 co-relation queries the response was YES. [2023-08-25 08:28:50,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4938 conditions, 3292 events. 164/3292 cut-off events. For 26182/26182 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 16030 event pairs, 0 based on Foata normal form. 0/2431 useless extension candidates. Maximal degree in co-relation 4831. Up to 108 conditions per place. [2023-08-25 08:28:50,889 INFO L82 GeneralOperation]: Start removeDead. Operand has 4010 places, 4115 transitions, 14272 flow [2023-08-25 08:28:50,931 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2657 places, 2658 transitions, 8340 flow [2023-08-25 08:28:50,931 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:28:50,931 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2657 places, 2658 transitions, 8340 flow [2023-08-25 08:28:50,931 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2657 places, 2658 transitions, 8340 flow [2023-08-25 08:28:50,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2657 places, 2658 transitions, 8340 flow [2023-08-25 08:28:54,642 INFO L124 PetriNetUnfolderBase]: 164/3292 cut-off events. [2023-08-25 08:28:54,642 INFO L125 PetriNetUnfolderBase]: For 26182/26182 co-relation queries the response was YES. [2023-08-25 08:28:54,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4886 conditions, 3292 events. 164/3292 cut-off events. For 26182/26182 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 16022 event pairs, 0 based on Foata normal form. 0/2431 useless extension candidates. Maximal degree in co-relation 4810. Up to 108 conditions per place. [2023-08-25 08:28:56,315 INFO L119 LiptonReduction]: Number of co-enabled transitions 6689304 [2023-08-25 08:29:09,506 INFO L134 LiptonReduction]: Checked pairs total: 45266411 [2023-08-25 08:29:09,507 INFO L136 LiptonReduction]: Total number of compositions: 989 [2023-08-25 08:29:09,508 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:29:09,508 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:29:09,508 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:29:11,295 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:29:11,295 INFO L124 PetriNetUnfolderBase]: 49/2103 cut-off events. [2023-08-25 08:29:11,295 INFO L125 PetriNetUnfolderBase]: For 26182/26182 co-relation queries the response was YES. [2023-08-25 08:29:11,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:29:11,295 INFO L208 CegarLoopForPetriNet]: trace histogram [54, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:29:11,295 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:29:11,295 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:29:11,296 INFO L85 PathProgramCache]: Analyzing trace with hash 749308969, now seen corresponding path program 1 times [2023-08-25 08:29:11,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:29:11,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892376394] [2023-08-25 08:29:11,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:29:11,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:29:11,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:29:11,407 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:29:11,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:29:11,535 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:29:11,536 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:29:11,536 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:29:11,536 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:29:11,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2023-08-25 08:29:11,536 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:29:11,536 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:29:11,536 WARN L233 ceAbstractionStarter]: 53 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:29:11,536 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 54 thread instances. [2023-08-25 08:29:11,779 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:29:11,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 4085 places, 4192 transitions, 14648 flow [2023-08-25 08:29:15,989 INFO L124 PetriNetUnfolderBase]: 167/3353 cut-off events. [2023-08-25 08:29:15,989 INFO L125 PetriNetUnfolderBase]: For 27666/27666 co-relation queries the response was YES. [2023-08-25 08:29:16,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5057 conditions, 3353 events. 167/3353 cut-off events. For 27666/27666 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 16360 event pairs, 0 based on Foata normal form. 0/2476 useless extension candidates. Maximal degree in co-relation 4948. Up to 110 conditions per place. [2023-08-25 08:29:16,247 INFO L82 GeneralOperation]: Start removeDead. Operand has 4085 places, 4192 transitions, 14648 flow [2023-08-25 08:29:16,279 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2706 places, 2707 transitions, 8549 flow [2023-08-25 08:29:16,279 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:29:16,279 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2706 places, 2707 transitions, 8549 flow [2023-08-25 08:29:16,279 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2706 places, 2707 transitions, 8549 flow [2023-08-25 08:29:16,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2706 places, 2707 transitions, 8549 flow [2023-08-25 08:29:19,899 INFO L124 PetriNetUnfolderBase]: 167/3353 cut-off events. [2023-08-25 08:29:19,899 INFO L125 PetriNetUnfolderBase]: For 27666/27666 co-relation queries the response was YES. [2023-08-25 08:29:20,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5004 conditions, 3353 events. 167/3353 cut-off events. For 27666/27666 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 16620 event pairs, 0 based on Foata normal form. 0/2476 useless extension candidates. Maximal degree in co-relation 4927. Up to 110 conditions per place. [2023-08-25 08:29:21,967 INFO L119 LiptonReduction]: Number of co-enabled transitions 6942510 [2023-08-25 08:29:35,544 INFO L134 LiptonReduction]: Checked pairs total: 47137955 [2023-08-25 08:29:35,544 INFO L136 LiptonReduction]: Total number of compositions: 1012 [2023-08-25 08:29:35,545 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 08:29:35,546 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;@725bce72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 08:29:35,546 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-25 08:29:37,388 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 08:29:37,388 INFO L124 PetriNetUnfolderBase]: 51/2145 cut-off events. [2023-08-25 08:29:37,388 INFO L125 PetriNetUnfolderBase]: For 27666/27666 co-relation queries the response was YES. [2023-08-25 08:29:37,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 08:29:37,389 INFO L208 CegarLoopForPetriNet]: trace histogram [55, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 08:29:37,389 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 08:29:37,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 08:29:37,389 INFO L85 PathProgramCache]: Analyzing trace with hash -169058454, now seen corresponding path program 1 times [2023-08-25 08:29:37,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 08:29:37,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237683027] [2023-08-25 08:29:37,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 08:29:37,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 08:29:37,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:29:37,506 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 08:29:37,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 08:29:37,653 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 08:29:37,654 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 08:29:37,654 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-25 08:29:37,654 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-25 08:29:37,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2023-08-25 08:29:37,654 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 08:29:37,654 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-25 08:29:37,654 WARN L233 ceAbstractionStarter]: 54 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 08:29:37,654 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 55 thread instances. [2023-08-25 08:29:38,223 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 08:29:38,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 4160 places, 4269 transitions, 15028 flow [2023-08-25 08:29:42,238 INFO L124 PetriNetUnfolderBase]: 170/3414 cut-off events. [2023-08-25 08:29:42,238 INFO L125 PetriNetUnfolderBase]: For 29205/29205 co-relation queries the response was YES. [2023-08-25 08:29:42,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5177 conditions, 3414 events. 170/3414 cut-off events. For 29205/29205 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 16678 event pairs, 0 based on Foata normal form. 0/2521 useless extension candidates. Maximal degree in co-relation 5066. Up to 112 conditions per place. [2023-08-25 08:29:42,538 INFO L82 GeneralOperation]: Start removeDead. Operand has 4160 places, 4269 transitions, 15028 flow [2023-08-25 08:29:42,576 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2755 places, 2756 transitions, 8760 flow [2023-08-25 08:29:42,576 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 08:29:42,576 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2755 places, 2756 transitions, 8760 flow [2023-08-25 08:29:42,576 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2755 places, 2756 transitions, 8760 flow [2023-08-25 08:29:42,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2755 places, 2756 transitions, 8760 flow [2023-08-25 08:29:46,621 INFO L124 PetriNetUnfolderBase]: 170/3414 cut-off events. [2023-08-25 08:29:46,622 INFO L125 PetriNetUnfolderBase]: For 29205/29205 co-relation queries the response was YES. [2023-08-25 08:29:46,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5123 conditions, 3414 events. 170/3414 cut-off events. For 29205/29205 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 16658 event pairs, 0 based on Foata normal form. 0/2521 useless extension candidates. Maximal degree in co-relation 5045. Up to 112 conditions per place.