/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.data.races.in.concurrent.programs true -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_22-deref_read_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-25 18:07:44,233 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-25 18:07:44,310 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-25 18:07:44,315 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-25 18:07:44,315 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-25 18:07:44,352 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-25 18:07:44,352 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-25 18:07:44,353 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-25 18:07:44,353 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-25 18:07:44,357 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-25 18:07:44,357 INFO L153 SettingsManager]: * Use SBE=true [2023-08-25 18:07:44,357 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-25 18:07:44,357 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-25 18:07:44,359 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-25 18:07:44,359 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-25 18:07:44,359 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-25 18:07:44,359 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-25 18:07:44,359 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-25 18:07:44,360 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-25 18:07:44,360 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-25 18:07:44,360 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-25 18:07:44,361 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-25 18:07:44,361 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-25 18:07:44,362 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-25 18:07:44,362 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-25 18:07:44,362 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-25 18:07:44,362 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-25 18:07:44,363 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-25 18:07:44,363 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-25 18:07:44,363 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-25 18:07:44,364 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-25 18:07:44,364 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-25 18:07:44,364 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-25 18:07:44,365 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-25 18:07:44,365 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-25 18:07:44,365 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of data races in concurrent programs -> true [2023-08-25 18:07:44,689 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-25 18:07:44,708 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-25 18:07:44,710 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-25 18:07:44,711 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-25 18:07:44,712 INFO L274 PluginConnector]: CDTParser initialized [2023-08-25 18:07:44,713 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_22-deref_read_racefree.i [2023-08-25 18:07:46,024 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-25 18:07:46,309 INFO L384 CDTParser]: Found 1 translation units. [2023-08-25 18:07:46,309 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_22-deref_read_racefree.i [2023-08-25 18:07:46,326 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5893e379/82d1904d5d0d48c2868c7f6a978cdbab/FLAG4556f2802 [2023-08-25 18:07:46,343 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5893e379/82d1904d5d0d48c2868c7f6a978cdbab [2023-08-25 18:07:46,347 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-25 18:07:46,350 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-25 18:07:46,353 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-25 18:07:46,353 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-25 18:07:46,355 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-25 18:07:46,357 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 06:07:46" (1/1) ... [2023-08-25 18:07:46,358 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11ac46c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:07:46, skipping insertion in model container [2023-08-25 18:07:46,358 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 06:07:46" (1/1) ... [2023-08-25 18:07:46,407 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-25 18:07:46,659 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-25 18:07:46,675 INFO L201 MainTranslator]: Completed pre-run [2023-08-25 18:07:46,695 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-25 18:07:46,702 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-25 18:07:46,721 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-25 18:07:46,755 INFO L206 MainTranslator]: Completed translation [2023-08-25 18:07:46,755 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:07:46 WrapperNode [2023-08-25 18:07:46,755 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-25 18:07:46,756 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-25 18:07:46,756 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-25 18:07:46,756 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-25 18:07:46,762 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:07:46" (1/1) ... [2023-08-25 18:07:46,778 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:07:46" (1/1) ... [2023-08-25 18:07:46,799 INFO L138 Inliner]: procedures = 170, calls = 37, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 85 [2023-08-25 18:07:46,799 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-25 18:07:46,800 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-25 18:07:46,800 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-25 18:07:46,800 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-25 18:07:46,808 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:07:46" (1/1) ... [2023-08-25 18:07:46,808 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:07:46" (1/1) ... [2023-08-25 18:07:46,811 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:07:46" (1/1) ... [2023-08-25 18:07:46,812 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:07:46" (1/1) ... [2023-08-25 18:07:46,827 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:07:46" (1/1) ... [2023-08-25 18:07:46,844 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:07:46" (1/1) ... [2023-08-25 18:07:46,846 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:07:46" (1/1) ... [2023-08-25 18:07:46,847 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:07:46" (1/1) ... [2023-08-25 18:07:46,850 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-25 18:07:46,851 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-25 18:07:46,851 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-25 18:07:46,851 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-25 18:07:46,852 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:07:46" (1/1) ... [2023-08-25 18:07:46,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-25 18:07:46,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-25 18:07:46,880 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-25 18:07:46,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-25 18:07:46,909 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-25 18:07:46,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-25 18:07:46,909 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-25 18:07:46,909 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-25 18:07:46,909 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-25 18:07:46,910 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-25 18:07:46,910 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-25 18:07:46,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-25 18:07:46,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-25 18:07:46,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-25 18:07:46,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-25 18:07:46,911 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-25 18:07:47,050 INFO L236 CfgBuilder]: Building ICFG [2023-08-25 18:07:47,052 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-25 18:07:47,371 INFO L277 CfgBuilder]: Performing block encoding [2023-08-25 18:07:47,390 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-25 18:07:47,390 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-08-25 18:07:47,392 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 06:07:47 BoogieIcfgContainer [2023-08-25 18:07:47,393 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-25 18:07:47,395 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-25 18:07:47,395 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-25 18:07:47,398 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-25 18:07:47,398 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.08 06:07:46" (1/3) ... [2023-08-25 18:07:47,398 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d682163 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 06:07:47, skipping insertion in model container [2023-08-25 18:07:47,399 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:07:46" (2/3) ... [2023-08-25 18:07:47,399 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d682163 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 06:07:47, skipping insertion in model container [2023-08-25 18:07:47,399 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 06:07:47" (3/3) ... [2023-08-25 18:07:47,400 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_22-deref_read_racefree.i [2023-08-25 18:07:47,416 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-25 18:07:47,416 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2023-08-25 18:07:47,416 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-25 18:07:47,507 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 18:07:47,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 156 transitions, 317 flow [2023-08-25 18:07:47,600 INFO L124 PetriNetUnfolderBase]: 16/209 cut-off events. [2023-08-25 18:07:47,601 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-25 18:07:47,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 209 events. 16/209 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 596 event pairs, 0 based on Foata normal form. 0/175 useless extension candidates. Maximal degree in co-relation 124. Up to 4 conditions per place. [2023-08-25 18:07:47,610 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 156 transitions, 317 flow [2023-08-25 18:07:47,615 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 148 places, 156 transitions, 317 flow [2023-08-25 18:07:47,618 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:07:47,625 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 148 places, 156 transitions, 317 flow [2023-08-25 18:07:47,628 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 148 places, 156 transitions, 317 flow [2023-08-25 18:07:47,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 156 transitions, 317 flow [2023-08-25 18:07:47,668 INFO L124 PetriNetUnfolderBase]: 16/209 cut-off events. [2023-08-25 18:07:47,669 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-25 18:07:47,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 209 events. 16/209 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 596 event pairs, 0 based on Foata normal form. 0/175 useless extension candidates. Maximal degree in co-relation 124. Up to 4 conditions per place. [2023-08-25 18:07:47,674 INFO L119 LiptonReduction]: Number of co-enabled transitions 7788 [2023-08-25 18:07:50,809 INFO L134 LiptonReduction]: Checked pairs total: 29608 [2023-08-25 18:07:50,810 INFO L136 LiptonReduction]: Total number of compositions: 107 [2023-08-25 18:07:50,822 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:07:50,829 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;@4a16ad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:07:50,830 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:07:50,834 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:07:50,834 INFO L124 PetriNetUnfolderBase]: 0/19 cut-off events. [2023-08-25 18:07:50,834 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-25 18:07:50,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:07:50,835 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-25 18:07:50,835 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:07:50,840 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:07:50,840 INFO L85 PathProgramCache]: Analyzing trace with hash -549755668, now seen corresponding path program 1 times [2023-08-25 18:07:50,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:07:50,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527892540] [2023-08-25 18:07:50,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:07:50,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:07:50,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:07:50,997 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:07:51,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:07:51,064 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:07:51,065 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:07:51,066 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:07:51,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-25 18:07:51,069 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:07:51,074 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:07:51,075 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:07:51,075 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-25 18:07:51,110 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 18:07:51,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 223 transitions, 458 flow [2023-08-25 18:07:51,177 INFO L124 PetriNetUnfolderBase]: 27/334 cut-off events. [2023-08-25 18:07:51,178 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-25 18:07:51,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 344 conditions, 334 events. 27/334 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1281 event pairs, 0 based on Foata normal form. 0/277 useless extension candidates. Maximal degree in co-relation 210. Up to 6 conditions per place. [2023-08-25 18:07:51,187 INFO L82 GeneralOperation]: Start removeDead. Operand has 211 places, 223 transitions, 458 flow [2023-08-25 18:07:51,190 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 211 places, 223 transitions, 458 flow [2023-08-25 18:07:51,190 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:07:51,190 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 211 places, 223 transitions, 458 flow [2023-08-25 18:07:51,190 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 211 places, 223 transitions, 458 flow [2023-08-25 18:07:51,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 223 transitions, 458 flow [2023-08-25 18:07:51,270 INFO L124 PetriNetUnfolderBase]: 27/334 cut-off events. [2023-08-25 18:07:51,270 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-25 18:07:51,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 344 conditions, 334 events. 27/334 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1281 event pairs, 0 based on Foata normal form. 0/277 useless extension candidates. Maximal degree in co-relation 210. Up to 6 conditions per place. [2023-08-25 18:07:51,287 INFO L119 LiptonReduction]: Number of co-enabled transitions 24420 [2023-08-25 18:07:54,362 INFO L134 LiptonReduction]: Checked pairs total: 126832 [2023-08-25 18:07:54,363 INFO L136 LiptonReduction]: Total number of compositions: 132 [2023-08-25 18:07:54,365 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:07:54,366 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;@4a16ad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:07:54,366 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:07:54,395 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:07:54,396 INFO L124 PetriNetUnfolderBase]: 3/65 cut-off events. [2023-08-25 18:07:54,396 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-25 18:07:54,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:07:54,397 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-25 18:07:54,398 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:07:54,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:07:54,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1686532624, now seen corresponding path program 1 times [2023-08-25 18:07:54,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:07:54,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858771946] [2023-08-25 18:07:54,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:07:54,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:07:54,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:07:54,447 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:07:54,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:07:54,485 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:07:54,485 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:07:54,486 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:07:54,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-25 18:07:54,486 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:07:54,486 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:07:54,487 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:07:54,487 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-25 18:07:54,515 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 18:07:54,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 274 places, 290 transitions, 601 flow [2023-08-25 18:07:54,587 INFO L124 PetriNetUnfolderBase]: 38/459 cut-off events. [2023-08-25 18:07:54,587 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-25 18:07:54,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 475 conditions, 459 events. 38/459 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1985 event pairs, 0 based on Foata normal form. 0/379 useless extension candidates. Maximal degree in co-relation 338. Up to 8 conditions per place. [2023-08-25 18:07:54,593 INFO L82 GeneralOperation]: Start removeDead. Operand has 274 places, 290 transitions, 601 flow [2023-08-25 18:07:54,597 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 274 places, 290 transitions, 601 flow [2023-08-25 18:07:54,597 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:07:54,597 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 274 places, 290 transitions, 601 flow [2023-08-25 18:07:54,597 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 274 places, 290 transitions, 601 flow [2023-08-25 18:07:54,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 274 places, 290 transitions, 601 flow [2023-08-25 18:07:54,655 INFO L124 PetriNetUnfolderBase]: 38/459 cut-off events. [2023-08-25 18:07:54,655 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-25 18:07:54,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 475 conditions, 459 events. 38/459 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1985 event pairs, 0 based on Foata normal form. 0/379 useless extension candidates. Maximal degree in co-relation 338. Up to 8 conditions per place. [2023-08-25 18:07:54,684 INFO L119 LiptonReduction]: Number of co-enabled transitions 49896 [2023-08-25 18:07:57,867 INFO L134 LiptonReduction]: Checked pairs total: 254550 [2023-08-25 18:07:57,867 INFO L136 LiptonReduction]: Total number of compositions: 153 [2023-08-25 18:07:57,869 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:07:57,870 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;@4a16ad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:07:57,870 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:07:57,881 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:07:57,881 INFO L124 PetriNetUnfolderBase]: 7/117 cut-off events. [2023-08-25 18:07:57,881 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-25 18:07:57,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:07:57,882 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-25 18:07:57,882 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:07:57,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:07:57,882 INFO L85 PathProgramCache]: Analyzing trace with hash -475006827, now seen corresponding path program 1 times [2023-08-25 18:07:57,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:07:57,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96186519] [2023-08-25 18:07:57,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:07:57,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:07:57,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:07:57,919 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:07:57,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:07:57,958 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:07:57,959 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:07:57,959 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:07:57,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-25 18:07:57,959 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:07:57,960 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:07:57,960 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:07:57,960 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-25 18:07:57,991 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 18:07:57,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 337 places, 357 transitions, 746 flow [2023-08-25 18:07:58,090 INFO L124 PetriNetUnfolderBase]: 49/584 cut-off events. [2023-08-25 18:07:58,091 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-25 18:07:58,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 607 conditions, 584 events. 49/584 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2693 event pairs, 0 based on Foata normal form. 0/481 useless extension candidates. Maximal degree in co-relation 467. Up to 10 conditions per place. [2023-08-25 18:07:58,102 INFO L82 GeneralOperation]: Start removeDead. Operand has 337 places, 357 transitions, 746 flow [2023-08-25 18:07:58,111 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 337 places, 357 transitions, 746 flow [2023-08-25 18:07:58,112 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:07:58,112 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 337 places, 357 transitions, 746 flow [2023-08-25 18:07:58,113 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 337 places, 357 transitions, 746 flow [2023-08-25 18:07:58,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 337 places, 357 transitions, 746 flow [2023-08-25 18:07:58,203 INFO L124 PetriNetUnfolderBase]: 49/584 cut-off events. [2023-08-25 18:07:58,203 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-25 18:07:58,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 607 conditions, 584 events. 49/584 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2693 event pairs, 0 based on Foata normal form. 0/481 useless extension candidates. Maximal degree in co-relation 467. Up to 10 conditions per place. [2023-08-25 18:07:58,242 INFO L119 LiptonReduction]: Number of co-enabled transitions 84216 [2023-08-25 18:08:01,508 INFO L134 LiptonReduction]: Checked pairs total: 447318 [2023-08-25 18:08:01,508 INFO L136 LiptonReduction]: Total number of compositions: 174 [2023-08-25 18:08:01,510 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:08:01,511 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;@4a16ad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:08:01,511 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:08:01,528 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:08:01,528 INFO L124 PetriNetUnfolderBase]: 13/183 cut-off events. [2023-08-25 18:08:01,528 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-25 18:08:01,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:08:01,528 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-25 18:08:01,529 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:08:01,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:08:01,529 INFO L85 PathProgramCache]: Analyzing trace with hash -478899987, now seen corresponding path program 1 times [2023-08-25 18:08:01,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:08:01,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547346985] [2023-08-25 18:08:01,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:08:01,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:08:01,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:08:01,568 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:08:01,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:08:01,605 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:08:01,606 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:08:01,606 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:08:01,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-25 18:08:01,606 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:08:01,607 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:08:01,607 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:08:01,607 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-25 18:08:01,642 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 18:08:01,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 400 places, 424 transitions, 893 flow [2023-08-25 18:08:01,782 INFO L124 PetriNetUnfolderBase]: 60/709 cut-off events. [2023-08-25 18:08:01,783 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-08-25 18:08:01,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 740 conditions, 709 events. 60/709 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 3434 event pairs, 0 based on Foata normal form. 0/583 useless extension candidates. Maximal degree in co-relation 597. Up to 12 conditions per place. [2023-08-25 18:08:01,804 INFO L82 GeneralOperation]: Start removeDead. Operand has 400 places, 424 transitions, 893 flow [2023-08-25 18:08:01,811 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 400 places, 424 transitions, 893 flow [2023-08-25 18:08:01,811 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:08:01,812 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 400 places, 424 transitions, 893 flow [2023-08-25 18:08:01,812 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 400 places, 424 transitions, 893 flow [2023-08-25 18:08:01,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 400 places, 424 transitions, 893 flow [2023-08-25 18:08:01,960 INFO L124 PetriNetUnfolderBase]: 60/709 cut-off events. [2023-08-25 18:08:01,961 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-08-25 18:08:01,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 740 conditions, 709 events. 60/709 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 3434 event pairs, 0 based on Foata normal form. 0/583 useless extension candidates. Maximal degree in co-relation 597. Up to 12 conditions per place. [2023-08-25 18:08:02,023 INFO L119 LiptonReduction]: Number of co-enabled transitions 127380 [2023-08-25 18:08:05,373 INFO L134 LiptonReduction]: Checked pairs total: 708846 [2023-08-25 18:08:05,373 INFO L136 LiptonReduction]: Total number of compositions: 206 [2023-08-25 18:08:05,375 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:08:05,375 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;@4a16ad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:08:05,375 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:08:05,401 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:08:05,401 INFO L124 PetriNetUnfolderBase]: 25/249 cut-off events. [2023-08-25 18:08:05,401 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-08-25 18:08:05,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:08:05,401 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:08:05,402 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:08:05,402 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:08:05,402 INFO L85 PathProgramCache]: Analyzing trace with hash 885199377, now seen corresponding path program 1 times [2023-08-25 18:08:05,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:08:05,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739582129] [2023-08-25 18:08:05,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:08:05,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:08:05,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:08:05,421 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:08:05,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:08:05,439 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:08:05,439 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:08:05,439 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:08:05,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-25 18:08:05,439 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:08:05,440 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:08:05,440 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:08:05,440 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-25 18:08:05,473 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 18:08:05,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 463 places, 491 transitions, 1042 flow [2023-08-25 18:08:05,652 INFO L124 PetriNetUnfolderBase]: 71/834 cut-off events. [2023-08-25 18:08:05,652 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-08-25 18:08:05,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 874 conditions, 834 events. 71/834 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 4115 event pairs, 0 based on Foata normal form. 0/685 useless extension candidates. Maximal degree in co-relation 728. Up to 14 conditions per place. [2023-08-25 18:08:05,681 INFO L82 GeneralOperation]: Start removeDead. Operand has 463 places, 491 transitions, 1042 flow [2023-08-25 18:08:05,692 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 463 places, 491 transitions, 1042 flow [2023-08-25 18:08:05,692 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:08:05,692 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 463 places, 491 transitions, 1042 flow [2023-08-25 18:08:05,693 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 463 places, 491 transitions, 1042 flow [2023-08-25 18:08:05,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 463 places, 491 transitions, 1042 flow [2023-08-25 18:08:05,898 INFO L124 PetriNetUnfolderBase]: 71/834 cut-off events. [2023-08-25 18:08:05,898 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-08-25 18:08:05,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 874 conditions, 834 events. 71/834 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 4115 event pairs, 0 based on Foata normal form. 0/685 useless extension candidates. Maximal degree in co-relation 728. Up to 14 conditions per place. [2023-08-25 18:08:05,973 INFO L119 LiptonReduction]: Number of co-enabled transitions 179388 [2023-08-25 18:08:09,702 INFO L134 LiptonReduction]: Checked pairs total: 1012454 [2023-08-25 18:08:09,703 INFO L136 LiptonReduction]: Total number of compositions: 227 [2023-08-25 18:08:09,704 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:08:09,705 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;@4a16ad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:08:09,705 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:08:09,742 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:08:09,742 INFO L124 PetriNetUnfolderBase]: 32/318 cut-off events. [2023-08-25 18:08:09,742 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-08-25 18:08:09,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:08:09,743 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:08:09,743 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:08:09,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:08:09,743 INFO L85 PathProgramCache]: Analyzing trace with hash -515662111, now seen corresponding path program 1 times [2023-08-25 18:08:09,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:08:09,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615779981] [2023-08-25 18:08:09,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:08:09,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:08:09,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:08:09,777 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:08:09,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:08:09,816 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:08:09,818 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:08:09,819 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:08:09,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-25 18:08:09,819 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:08:09,823 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:08:09,823 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:08:09,824 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-25 18:08:09,876 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 18:08:09,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 526 places, 558 transitions, 1193 flow [2023-08-25 18:08:10,098 INFO L124 PetriNetUnfolderBase]: 82/959 cut-off events. [2023-08-25 18:08:10,098 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-08-25 18:08:10,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1009 conditions, 959 events. 82/959 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 4812 event pairs, 0 based on Foata normal form. 0/787 useless extension candidates. Maximal degree in co-relation 860. Up to 16 conditions per place. [2023-08-25 18:08:10,127 INFO L82 GeneralOperation]: Start removeDead. Operand has 526 places, 558 transitions, 1193 flow [2023-08-25 18:08:10,135 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 526 places, 558 transitions, 1193 flow [2023-08-25 18:08:10,136 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:08:10,136 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 526 places, 558 transitions, 1193 flow [2023-08-25 18:08:10,136 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 526 places, 558 transitions, 1193 flow [2023-08-25 18:08:10,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 526 places, 558 transitions, 1193 flow [2023-08-25 18:08:10,356 INFO L124 PetriNetUnfolderBase]: 82/959 cut-off events. [2023-08-25 18:08:10,356 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-08-25 18:08:10,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1009 conditions, 959 events. 82/959 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 4812 event pairs, 0 based on Foata normal form. 0/787 useless extension candidates. Maximal degree in co-relation 860. Up to 16 conditions per place. [2023-08-25 18:08:10,451 INFO L119 LiptonReduction]: Number of co-enabled transitions 240240 [2023-08-25 18:08:14,491 INFO L134 LiptonReduction]: Checked pairs total: 1555611 [2023-08-25 18:08:14,491 INFO L136 LiptonReduction]: Total number of compositions: 248 [2023-08-25 18:08:14,493 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:08:14,493 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;@4a16ad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:08:14,493 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:08:14,546 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:08:14,546 INFO L124 PetriNetUnfolderBase]: 43/392 cut-off events. [2023-08-25 18:08:14,546 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-08-25 18:08:14,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:08:14,546 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:08:14,546 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:08:14,547 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:08:14,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1510955648, now seen corresponding path program 1 times [2023-08-25 18:08:14,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:08:14,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987292860] [2023-08-25 18:08:14,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:08:14,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:08:14,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:08:14,567 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:08:14,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:08:14,585 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:08:14,585 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:08:14,585 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:08:14,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-25 18:08:14,585 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:08:14,586 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:08:14,586 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:08:14,586 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-08-25 18:08:14,623 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 18:08:14,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 589 places, 625 transitions, 1346 flow [2023-08-25 18:08:14,909 INFO L124 PetriNetUnfolderBase]: 93/1084 cut-off events. [2023-08-25 18:08:14,909 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2023-08-25 18:08:14,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1145 conditions, 1084 events. 93/1084 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 5544 event pairs, 0 based on Foata normal form. 0/889 useless extension candidates. Maximal degree in co-relation 993. Up to 18 conditions per place. [2023-08-25 18:08:14,944 INFO L82 GeneralOperation]: Start removeDead. Operand has 589 places, 625 transitions, 1346 flow [2023-08-25 18:08:14,955 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 589 places, 625 transitions, 1346 flow [2023-08-25 18:08:14,955 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:08:14,955 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 589 places, 625 transitions, 1346 flow [2023-08-25 18:08:14,956 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 589 places, 625 transitions, 1346 flow [2023-08-25 18:08:14,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 589 places, 625 transitions, 1346 flow [2023-08-25 18:08:15,275 INFO L124 PetriNetUnfolderBase]: 93/1084 cut-off events. [2023-08-25 18:08:15,275 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2023-08-25 18:08:15,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1145 conditions, 1084 events. 93/1084 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 5544 event pairs, 0 based on Foata normal form. 0/889 useless extension candidates. Maximal degree in co-relation 993. Up to 18 conditions per place. [2023-08-25 18:08:15,380 INFO L119 LiptonReduction]: Number of co-enabled transitions 309936 [2023-08-25 18:08:19,491 INFO L134 LiptonReduction]: Checked pairs total: 1796219 [2023-08-25 18:08:19,491 INFO L136 LiptonReduction]: Total number of compositions: 279 [2023-08-25 18:08:19,493 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:08:19,494 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;@4a16ad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:08:19,494 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:08:19,558 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:08:19,559 INFO L124 PetriNetUnfolderBase]: 50/459 cut-off events. [2023-08-25 18:08:19,559 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2023-08-25 18:08:19,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:08:19,559 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:08:19,559 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:08:19,559 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:08:19,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1344439138, now seen corresponding path program 1 times [2023-08-25 18:08:19,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:08:19,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489867479] [2023-08-25 18:08:19,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:08:19,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:08:19,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:08:19,578 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:08:19,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:08:19,597 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:08:19,598 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:08:19,598 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:08:19,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-25 18:08:19,598 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:08:19,599 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:08:19,599 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:08:19,599 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-08-25 18:08:19,640 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 18:08:19,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 652 places, 692 transitions, 1501 flow [2023-08-25 18:08:20,010 INFO L124 PetriNetUnfolderBase]: 104/1209 cut-off events. [2023-08-25 18:08:20,010 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2023-08-25 18:08:20,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1282 conditions, 1209 events. 104/1209 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 6278 event pairs, 0 based on Foata normal form. 0/991 useless extension candidates. Maximal degree in co-relation 1127. Up to 20 conditions per place. [2023-08-25 18:08:20,069 INFO L82 GeneralOperation]: Start removeDead. Operand has 652 places, 692 transitions, 1501 flow [2023-08-25 18:08:20,082 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 652 places, 692 transitions, 1501 flow [2023-08-25 18:08:20,082 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:08:20,082 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 652 places, 692 transitions, 1501 flow [2023-08-25 18:08:20,083 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 652 places, 692 transitions, 1501 flow [2023-08-25 18:08:20,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 652 places, 692 transitions, 1501 flow [2023-08-25 18:08:20,420 INFO L124 PetriNetUnfolderBase]: 104/1209 cut-off events. [2023-08-25 18:08:20,421 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2023-08-25 18:08:20,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1282 conditions, 1209 events. 104/1209 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 6278 event pairs, 0 based on Foata normal form. 0/991 useless extension candidates. Maximal degree in co-relation 1127. Up to 20 conditions per place. [2023-08-25 18:08:20,560 INFO L119 LiptonReduction]: Number of co-enabled transitions 388476 [2023-08-25 18:08:24,793 INFO L134 LiptonReduction]: Checked pairs total: 2563225 [2023-08-25 18:08:24,794 INFO L136 LiptonReduction]: Total number of compositions: 300 [2023-08-25 18:08:24,795 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:08:24,795 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;@4a16ad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:08:24,796 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:08:24,881 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:08:24,881 INFO L124 PetriNetUnfolderBase]: 59/530 cut-off events. [2023-08-25 18:08:24,881 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2023-08-25 18:08:24,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:08:24,881 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:08:24,882 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:08:24,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:08:24,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1933166309, now seen corresponding path program 1 times [2023-08-25 18:08:24,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:08:24,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643656677] [2023-08-25 18:08:24,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:08:24,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:08:24,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:08:24,900 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:08:24,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:08:24,918 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:08:24,918 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:08:24,918 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:08:24,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-25 18:08:24,918 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:08:24,919 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:08:24,919 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:08:24,919 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-08-25 18:08:24,966 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 18:08:24,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 715 places, 759 transitions, 1658 flow [2023-08-25 18:08:25,393 INFO L124 PetriNetUnfolderBase]: 115/1334 cut-off events. [2023-08-25 18:08:25,393 INFO L125 PetriNetUnfolderBase]: For 210/210 co-relation queries the response was YES. [2023-08-25 18:08:25,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1420 conditions, 1334 events. 115/1334 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 6944 event pairs, 0 based on Foata normal form. 0/1093 useless extension candidates. Maximal degree in co-relation 1262. Up to 22 conditions per place. [2023-08-25 18:08:25,452 INFO L82 GeneralOperation]: Start removeDead. Operand has 715 places, 759 transitions, 1658 flow [2023-08-25 18:08:25,461 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 715 places, 759 transitions, 1658 flow [2023-08-25 18:08:25,461 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:08:25,461 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 715 places, 759 transitions, 1658 flow [2023-08-25 18:08:25,462 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 715 places, 759 transitions, 1658 flow [2023-08-25 18:08:25,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 715 places, 759 transitions, 1658 flow [2023-08-25 18:08:25,802 INFO L124 PetriNetUnfolderBase]: 115/1334 cut-off events. [2023-08-25 18:08:25,803 INFO L125 PetriNetUnfolderBase]: For 210/210 co-relation queries the response was YES. [2023-08-25 18:08:25,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1420 conditions, 1334 events. 115/1334 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 6944 event pairs, 0 based on Foata normal form. 0/1093 useless extension candidates. Maximal degree in co-relation 1262. Up to 22 conditions per place. [2023-08-25 18:08:25,971 INFO L119 LiptonReduction]: Number of co-enabled transitions 475860 [2023-08-25 18:08:30,260 INFO L134 LiptonReduction]: Checked pairs total: 2796752 [2023-08-25 18:08:30,261 INFO L136 LiptonReduction]: Total number of compositions: 322 [2023-08-25 18:08:30,262 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:08:30,262 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;@4a16ad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:08:30,262 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:08:30,414 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:08:30,414 INFO L124 PetriNetUnfolderBase]: 68/602 cut-off events. [2023-08-25 18:08:30,414 INFO L125 PetriNetUnfolderBase]: For 210/210 co-relation queries the response was YES. [2023-08-25 18:08:30,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:08:30,414 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:08:30,414 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:08:30,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:08:30,415 INFO L85 PathProgramCache]: Analyzing trace with hash -57785054, now seen corresponding path program 1 times [2023-08-25 18:08:30,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:08:30,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847857463] [2023-08-25 18:08:30,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:08:30,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:08:30,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:08:30,451 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:08:30,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:08:30,485 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:08:30,486 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:08:30,486 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:08:30,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-25 18:08:30,486 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:08:30,487 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:08:30,487 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:08:30,487 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-08-25 18:08:30,535 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 18:08:30,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 778 places, 826 transitions, 1817 flow [2023-08-25 18:08:31,040 INFO L124 PetriNetUnfolderBase]: 126/1459 cut-off events. [2023-08-25 18:08:31,040 INFO L125 PetriNetUnfolderBase]: For 275/275 co-relation queries the response was YES. [2023-08-25 18:08:31,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1559 conditions, 1459 events. 126/1459 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 7688 event pairs, 0 based on Foata normal form. 0/1195 useless extension candidates. Maximal degree in co-relation 1398. Up to 24 conditions per place. [2023-08-25 18:08:31,104 INFO L82 GeneralOperation]: Start removeDead. Operand has 778 places, 826 transitions, 1817 flow [2023-08-25 18:08:31,118 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 778 places, 826 transitions, 1817 flow [2023-08-25 18:08:31,118 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:08:31,118 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 778 places, 826 transitions, 1817 flow [2023-08-25 18:08:31,118 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 778 places, 826 transitions, 1817 flow [2023-08-25 18:08:31,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 778 places, 826 transitions, 1817 flow [2023-08-25 18:08:31,590 INFO L124 PetriNetUnfolderBase]: 126/1459 cut-off events. [2023-08-25 18:08:31,591 INFO L125 PetriNetUnfolderBase]: For 275/275 co-relation queries the response was YES. [2023-08-25 18:08:31,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1559 conditions, 1459 events. 126/1459 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 7688 event pairs, 0 based on Foata normal form. 0/1195 useless extension candidates. Maximal degree in co-relation 1398. Up to 24 conditions per place. [2023-08-25 18:08:31,751 INFO L119 LiptonReduction]: Number of co-enabled transitions 572088 [2023-08-25 18:08:36,744 INFO L134 LiptonReduction]: Checked pairs total: 3386447 [2023-08-25 18:08:36,744 INFO L136 LiptonReduction]: Total number of compositions: 345 [2023-08-25 18:08:36,746 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:08:36,746 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;@4a16ad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:08:36,746 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:08:36,857 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:08:36,857 INFO L124 PetriNetUnfolderBase]: 66/660 cut-off events. [2023-08-25 18:08:36,857 INFO L125 PetriNetUnfolderBase]: For 275/275 co-relation queries the response was YES. [2023-08-25 18:08:36,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:08:36,857 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:08:36,858 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:08:36,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:08:36,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1165415689, now seen corresponding path program 1 times [2023-08-25 18:08:36,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:08:36,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620154558] [2023-08-25 18:08:36,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:08:36,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:08:36,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:08:36,881 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:08:36,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:08:36,903 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:08:36,904 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:08:36,904 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:08:36,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-25 18:08:36,904 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:08:36,905 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:08:36,905 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:08:36,905 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-08-25 18:08:36,958 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 18:08:36,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 841 places, 893 transitions, 1978 flow [2023-08-25 18:08:37,535 INFO L124 PetriNetUnfolderBase]: 137/1584 cut-off events. [2023-08-25 18:08:37,535 INFO L125 PetriNetUnfolderBase]: For 352/352 co-relation queries the response was YES. [2023-08-25 18:08:37,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1699 conditions, 1584 events. 137/1584 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 8369 event pairs, 0 based on Foata normal form. 0/1297 useless extension candidates. Maximal degree in co-relation 1535. Up to 26 conditions per place. [2023-08-25 18:08:37,588 INFO L82 GeneralOperation]: Start removeDead. Operand has 841 places, 893 transitions, 1978 flow [2023-08-25 18:08:37,601 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 841 places, 893 transitions, 1978 flow [2023-08-25 18:08:37,601 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:08:37,601 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 841 places, 893 transitions, 1978 flow [2023-08-25 18:08:37,601 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 841 places, 893 transitions, 1978 flow [2023-08-25 18:08:37,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 841 places, 893 transitions, 1978 flow [2023-08-25 18:08:38,051 INFO L124 PetriNetUnfolderBase]: 137/1584 cut-off events. [2023-08-25 18:08:38,052 INFO L125 PetriNetUnfolderBase]: For 352/352 co-relation queries the response was YES. [2023-08-25 18:08:38,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1699 conditions, 1584 events. 137/1584 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 8369 event pairs, 0 based on Foata normal form. 0/1297 useless extension candidates. Maximal degree in co-relation 1535. Up to 26 conditions per place. [2023-08-25 18:08:38,323 INFO L119 LiptonReduction]: Number of co-enabled transitions 677160 [2023-08-25 18:08:43,586 INFO L134 LiptonReduction]: Checked pairs total: 4014928 [2023-08-25 18:08:43,587 INFO L136 LiptonReduction]: Total number of compositions: 368 [2023-08-25 18:08:43,588 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:08:43,588 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;@4a16ad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:08:43,588 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:08:43,711 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:08:43,712 INFO L124 PetriNetUnfolderBase]: 77/743 cut-off events. [2023-08-25 18:08:43,712 INFO L125 PetriNetUnfolderBase]: For 352/352 co-relation queries the response was YES. [2023-08-25 18:08:43,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:08:43,712 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:08:43,712 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:08:43,712 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:08:43,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1300168783, now seen corresponding path program 1 times [2023-08-25 18:08:43,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:08:43,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359684844] [2023-08-25 18:08:43,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:08:43,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:08:43,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:08:43,755 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:08:43,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:08:43,778 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:08:43,779 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:08:43,779 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:08:43,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-25 18:08:43,779 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:08:43,779 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:08:43,779 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:08:43,780 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-08-25 18:08:43,829 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 18:08:43,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 904 places, 960 transitions, 2141 flow [2023-08-25 18:08:44,398 INFO L124 PetriNetUnfolderBase]: 148/1709 cut-off events. [2023-08-25 18:08:44,398 INFO L125 PetriNetUnfolderBase]: For 442/442 co-relation queries the response was YES. [2023-08-25 18:08:44,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1840 conditions, 1709 events. 148/1709 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 9104 event pairs, 0 based on Foata normal form. 0/1399 useless extension candidates. Maximal degree in co-relation 1674. Up to 28 conditions per place. [2023-08-25 18:08:44,486 INFO L82 GeneralOperation]: Start removeDead. Operand has 904 places, 960 transitions, 2141 flow [2023-08-25 18:08:44,504 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 904 places, 960 transitions, 2141 flow [2023-08-25 18:08:44,504 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:08:44,504 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 904 places, 960 transitions, 2141 flow [2023-08-25 18:08:44,504 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 904 places, 960 transitions, 2141 flow [2023-08-25 18:08:44,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 904 places, 960 transitions, 2141 flow [2023-08-25 18:08:45,117 INFO L124 PetriNetUnfolderBase]: 148/1709 cut-off events. [2023-08-25 18:08:45,117 INFO L125 PetriNetUnfolderBase]: For 442/442 co-relation queries the response was YES. [2023-08-25 18:08:45,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1840 conditions, 1709 events. 148/1709 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 9104 event pairs, 0 based on Foata normal form. 0/1399 useless extension candidates. Maximal degree in co-relation 1674. Up to 28 conditions per place. [2023-08-25 18:08:45,362 INFO L119 LiptonReduction]: Number of co-enabled transitions 791076 [2023-08-25 18:08:51,161 INFO L134 LiptonReduction]: Checked pairs total: 4717712 [2023-08-25 18:08:51,161 INFO L136 LiptonReduction]: Total number of compositions: 390 [2023-08-25 18:08:51,163 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:08:51,163 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;@4a16ad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:08:51,163 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:08:51,307 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:08:51,307 INFO L124 PetriNetUnfolderBase]: 85/812 cut-off events. [2023-08-25 18:08:51,307 INFO L125 PetriNetUnfolderBase]: For 442/442 co-relation queries the response was YES. [2023-08-25 18:08:51,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:08:51,307 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:08:51,307 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:08:51,307 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:08:51,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1358879670, now seen corresponding path program 1 times [2023-08-25 18:08:51,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:08:51,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655200563] [2023-08-25 18:08:51,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:08:51,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:08:51,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:08:51,334 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:08:51,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:08:51,362 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:08:51,362 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:08:51,363 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:08:51,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-25 18:08:51,363 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:08:51,363 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:08:51,363 WARN L233 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:08:51,364 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2023-08-25 18:08:51,419 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 18:08:51,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 967 places, 1027 transitions, 2306 flow [2023-08-25 18:08:52,058 INFO L124 PetriNetUnfolderBase]: 159/1834 cut-off events. [2023-08-25 18:08:52,058 INFO L125 PetriNetUnfolderBase]: For 546/546 co-relation queries the response was YES. [2023-08-25 18:08:52,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1982 conditions, 1834 events. 159/1834 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 9808 event pairs, 0 based on Foata normal form. 0/1501 useless extension candidates. Maximal degree in co-relation 1815. Up to 30 conditions per place. [2023-08-25 18:08:52,145 INFO L82 GeneralOperation]: Start removeDead. Operand has 967 places, 1027 transitions, 2306 flow [2023-08-25 18:08:52,162 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 967 places, 1027 transitions, 2306 flow [2023-08-25 18:08:52,162 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:08:52,162 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 967 places, 1027 transitions, 2306 flow [2023-08-25 18:08:52,162 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 967 places, 1027 transitions, 2306 flow [2023-08-25 18:08:52,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 967 places, 1027 transitions, 2306 flow [2023-08-25 18:08:52,754 INFO L124 PetriNetUnfolderBase]: 159/1834 cut-off events. [2023-08-25 18:08:52,754 INFO L125 PetriNetUnfolderBase]: For 546/546 co-relation queries the response was YES. [2023-08-25 18:08:52,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1982 conditions, 1834 events. 159/1834 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 9808 event pairs, 0 based on Foata normal form. 0/1501 useless extension candidates. Maximal degree in co-relation 1815. Up to 30 conditions per place. [2023-08-25 18:08:53,138 INFO L119 LiptonReduction]: Number of co-enabled transitions 913836 [2023-08-25 18:08:58,977 INFO L134 LiptonReduction]: Checked pairs total: 5454385 [2023-08-25 18:08:58,977 INFO L136 LiptonReduction]: Total number of compositions: 416 [2023-08-25 18:08:58,979 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:08:58,979 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;@4a16ad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:08:58,979 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:08:59,139 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:08:59,140 INFO L124 PetriNetUnfolderBase]: 93/883 cut-off events. [2023-08-25 18:08:59,140 INFO L125 PetriNetUnfolderBase]: For 546/546 co-relation queries the response was YES. [2023-08-25 18:08:59,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:08:59,140 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:08:59,140 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:08:59,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:08:59,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1556995071, now seen corresponding path program 1 times [2023-08-25 18:08:59,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:08:59,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597345761] [2023-08-25 18:08:59,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:08:59,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:08:59,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:08:59,167 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:08:59,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:08:59,197 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:08:59,197 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:08:59,197 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:08:59,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-25 18:08:59,198 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:08:59,198 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:08:59,198 WARN L233 ceAbstractionStarter]: 14 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:08:59,198 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 15 thread instances. [2023-08-25 18:08:59,261 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 18:08:59,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1030 places, 1094 transitions, 2473 flow [2023-08-25 18:09:00,002 INFO L124 PetriNetUnfolderBase]: 170/1959 cut-off events. [2023-08-25 18:09:00,002 INFO L125 PetriNetUnfolderBase]: For 665/665 co-relation queries the response was YES. [2023-08-25 18:09:00,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2125 conditions, 1959 events. 170/1959 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 10491 event pairs, 0 based on Foata normal form. 0/1603 useless extension candidates. Maximal degree in co-relation 1957. Up to 32 conditions per place. [2023-08-25 18:09:00,133 INFO L82 GeneralOperation]: Start removeDead. Operand has 1030 places, 1094 transitions, 2473 flow [2023-08-25 18:09:00,157 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1030 places, 1094 transitions, 2473 flow [2023-08-25 18:09:00,158 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:09:00,158 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1030 places, 1094 transitions, 2473 flow [2023-08-25 18:09:00,158 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1030 places, 1094 transitions, 2473 flow [2023-08-25 18:09:00,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1030 places, 1094 transitions, 2473 flow [2023-08-25 18:09:00,948 INFO L124 PetriNetUnfolderBase]: 170/1959 cut-off events. [2023-08-25 18:09:00,948 INFO L125 PetriNetUnfolderBase]: For 665/665 co-relation queries the response was YES. [2023-08-25 18:09:01,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2125 conditions, 1959 events. 170/1959 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 10491 event pairs, 0 based on Foata normal form. 0/1603 useless extension candidates. Maximal degree in co-relation 1957. Up to 32 conditions per place. [2023-08-25 18:09:01,371 INFO L119 LiptonReduction]: Number of co-enabled transitions 1045440 [2023-08-25 18:09:07,571 INFO L134 LiptonReduction]: Checked pairs total: 6275468 [2023-08-25 18:09:07,571 INFO L136 LiptonReduction]: Total number of compositions: 439 [2023-08-25 18:09:07,572 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:09:07,573 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;@4a16ad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:09:07,573 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:09:07,768 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:09:07,768 INFO L124 PetriNetUnfolderBase]: 101/952 cut-off events. [2023-08-25 18:09:07,768 INFO L125 PetriNetUnfolderBase]: For 665/665 co-relation queries the response was YES. [2023-08-25 18:09:07,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:09:07,768 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] [2023-08-25 18:09:07,768 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:09:07,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:09:07,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1046917912, now seen corresponding path program 1 times [2023-08-25 18:09:07,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:09:07,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483044464] [2023-08-25 18:09:07,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:09:07,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:09:07,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:09:07,798 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:09:07,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:09:07,829 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:09:07,829 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:09:07,830 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:09:07,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-25 18:09:07,830 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:09:07,830 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:09:07,830 WARN L233 ceAbstractionStarter]: 15 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:09:07,830 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 16 thread instances. [2023-08-25 18:09:07,896 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 18:09:07,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1093 places, 1161 transitions, 2642 flow [2023-08-25 18:09:08,693 INFO L124 PetriNetUnfolderBase]: 181/2084 cut-off events. [2023-08-25 18:09:08,693 INFO L125 PetriNetUnfolderBase]: For 800/800 co-relation queries the response was YES. [2023-08-25 18:09:08,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2269 conditions, 2084 events. 181/2084 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 11227 event pairs, 0 based on Foata normal form. 0/1705 useless extension candidates. Maximal degree in co-relation 2100. Up to 34 conditions per place. [2023-08-25 18:09:08,806 INFO L82 GeneralOperation]: Start removeDead. Operand has 1093 places, 1161 transitions, 2642 flow [2023-08-25 18:09:08,828 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1093 places, 1161 transitions, 2642 flow [2023-08-25 18:09:08,829 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:09:08,829 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1093 places, 1161 transitions, 2642 flow [2023-08-25 18:09:08,829 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1093 places, 1161 transitions, 2642 flow [2023-08-25 18:09:08,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1093 places, 1161 transitions, 2642 flow [2023-08-25 18:09:09,699 INFO L124 PetriNetUnfolderBase]: 181/2084 cut-off events. [2023-08-25 18:09:09,699 INFO L125 PetriNetUnfolderBase]: For 800/800 co-relation queries the response was YES. [2023-08-25 18:09:09,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2269 conditions, 2084 events. 181/2084 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 11227 event pairs, 0 based on Foata normal form. 0/1705 useless extension candidates. Maximal degree in co-relation 2100. Up to 34 conditions per place. [2023-08-25 18:09:10,030 INFO L119 LiptonReduction]: Number of co-enabled transitions 1185888 [2023-08-25 18:09:16,914 INFO L134 LiptonReduction]: Checked pairs total: 7143791 [2023-08-25 18:09:16,914 INFO L136 LiptonReduction]: Total number of compositions: 467 [2023-08-25 18:09:16,915 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:09:16,916 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;@4a16ad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:09:16,916 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:09:17,157 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:09:17,157 INFO L124 PetriNetUnfolderBase]: 109/1024 cut-off events. [2023-08-25 18:09:17,157 INFO L125 PetriNetUnfolderBase]: For 800/800 co-relation queries the response was YES. [2023-08-25 18:09:17,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:09:17,158 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] [2023-08-25 18:09:17,158 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:09:17,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:09:17,158 INFO L85 PathProgramCache]: Analyzing trace with hash -258840112, now seen corresponding path program 1 times [2023-08-25 18:09:17,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:09:17,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078201587] [2023-08-25 18:09:17,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:09:17,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:09:17,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:09:17,188 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:09:17,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:09:17,221 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:09:17,221 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:09:17,221 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:09:17,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-25 18:09:17,222 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:09:17,222 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:09:17,222 WARN L233 ceAbstractionStarter]: 16 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:09:17,222 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 17 thread instances. [2023-08-25 18:09:17,293 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 18:09:17,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1156 places, 1228 transitions, 2813 flow [2023-08-25 18:09:18,425 INFO L124 PetriNetUnfolderBase]: 192/2209 cut-off events. [2023-08-25 18:09:18,426 INFO L125 PetriNetUnfolderBase]: For 952/952 co-relation queries the response was YES. [2023-08-25 18:09:18,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2414 conditions, 2209 events. 192/2209 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 11951 event pairs, 0 based on Foata normal form. 0/1807 useless extension candidates. Maximal degree in co-relation 2244. Up to 36 conditions per place. [2023-08-25 18:09:18,531 INFO L82 GeneralOperation]: Start removeDead. Operand has 1156 places, 1228 transitions, 2813 flow [2023-08-25 18:09:18,554 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1156 places, 1228 transitions, 2813 flow [2023-08-25 18:09:18,555 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:09:18,555 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1156 places, 1228 transitions, 2813 flow [2023-08-25 18:09:18,555 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1156 places, 1228 transitions, 2813 flow [2023-08-25 18:09:18,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1156 places, 1228 transitions, 2813 flow [2023-08-25 18:09:19,515 INFO L124 PetriNetUnfolderBase]: 192/2209 cut-off events. [2023-08-25 18:09:19,515 INFO L125 PetriNetUnfolderBase]: For 952/952 co-relation queries the response was YES. [2023-08-25 18:09:19,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2414 conditions, 2209 events. 192/2209 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 11951 event pairs, 0 based on Foata normal form. 0/1807 useless extension candidates. Maximal degree in co-relation 2244. Up to 36 conditions per place. [2023-08-25 18:09:20,071 INFO L119 LiptonReduction]: Number of co-enabled transitions 1335180 [2023-08-25 18:09:27,088 INFO L134 LiptonReduction]: Checked pairs total: 8054760 [2023-08-25 18:09:27,089 INFO L136 LiptonReduction]: Total number of compositions: 487 [2023-08-25 18:09:27,090 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:09:27,091 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;@4a16ad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:09:27,091 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:09:27,399 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:09:27,399 INFO L124 PetriNetUnfolderBase]: 117/1094 cut-off events. [2023-08-25 18:09:27,399 INFO L125 PetriNetUnfolderBase]: For 952/952 co-relation queries the response was YES. [2023-08-25 18:09:27,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:09:27,399 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] [2023-08-25 18:09:27,400 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:09:27,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:09:27,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1009784332, now seen corresponding path program 1 times [2023-08-25 18:09:27,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:09:27,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119287630] [2023-08-25 18:09:27,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:09:27,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:09:27,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:09:27,431 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:09:27,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:09:27,468 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:09:27,468 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:09:27,468 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:09:27,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-25 18:09:27,468 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:09:27,469 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:09:27,469 WARN L233 ceAbstractionStarter]: 17 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:09:27,469 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 18 thread instances. [2023-08-25 18:09:27,556 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 18:09:27,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1219 places, 1295 transitions, 2986 flow [2023-08-25 18:09:28,665 INFO L124 PetriNetUnfolderBase]: 203/2334 cut-off events. [2023-08-25 18:09:28,665 INFO L125 PetriNetUnfolderBase]: For 1122/1122 co-relation queries the response was YES. [2023-08-25 18:09:28,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2560 conditions, 2334 events. 203/2334 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 12645 event pairs, 0 based on Foata normal form. 0/1909 useless extension candidates. Maximal degree in co-relation 2389. Up to 38 conditions per place. [2023-08-25 18:09:28,854 INFO L82 GeneralOperation]: Start removeDead. Operand has 1219 places, 1295 transitions, 2986 flow [2023-08-25 18:09:28,892 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1219 places, 1295 transitions, 2986 flow [2023-08-25 18:09:28,892 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:09:28,892 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1219 places, 1295 transitions, 2986 flow [2023-08-25 18:09:28,892 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1219 places, 1295 transitions, 2986 flow [2023-08-25 18:09:28,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1219 places, 1295 transitions, 2986 flow [2023-08-25 18:09:29,922 INFO L124 PetriNetUnfolderBase]: 203/2334 cut-off events. [2023-08-25 18:09:29,922 INFO L125 PetriNetUnfolderBase]: For 1122/1122 co-relation queries the response was YES. [2023-08-25 18:09:30,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2560 conditions, 2334 events. 203/2334 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 12645 event pairs, 0 based on Foata normal form. 0/1909 useless extension candidates. Maximal degree in co-relation 2389. Up to 38 conditions per place. [2023-08-25 18:09:30,486 INFO L119 LiptonReduction]: Number of co-enabled transitions 1493316 [2023-08-25 18:09:38,206 INFO L134 LiptonReduction]: Checked pairs total: 9063687 [2023-08-25 18:09:38,206 INFO L136 LiptonReduction]: Total number of compositions: 507 [2023-08-25 18:09:38,208 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:09:38,208 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;@4a16ad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:09:38,208 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:09:38,516 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:09:38,516 INFO L124 PetriNetUnfolderBase]: 125/1163 cut-off events. [2023-08-25 18:09:38,517 INFO L125 PetriNetUnfolderBase]: For 1122/1122 co-relation queries the response was YES. [2023-08-25 18:09:38,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:09:38,517 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] [2023-08-25 18:09:38,517 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:09:38,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:09:38,517 INFO L85 PathProgramCache]: Analyzing trace with hash -272999101, now seen corresponding path program 1 times [2023-08-25 18:09:38,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:09:38,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351881671] [2023-08-25 18:09:38,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:09:38,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:09:38,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:09:38,549 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:09:38,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:09:38,585 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:09:38,586 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:09:38,586 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:09:38,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-25 18:09:38,586 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:09:38,586 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:09:38,586 WARN L233 ceAbstractionStarter]: 18 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:09:38,586 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 19 thread instances. [2023-08-25 18:09:38,661 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 18:09:38,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1282 places, 1362 transitions, 3161 flow [2023-08-25 18:09:39,771 INFO L124 PetriNetUnfolderBase]: 214/2459 cut-off events. [2023-08-25 18:09:39,771 INFO L125 PetriNetUnfolderBase]: For 1311/1311 co-relation queries the response was YES. [2023-08-25 18:09:39,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2707 conditions, 2459 events. 214/2459 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 13351 event pairs, 0 based on Foata normal form. 0/2011 useless extension candidates. Maximal degree in co-relation 2535. Up to 40 conditions per place. [2023-08-25 18:09:39,938 INFO L82 GeneralOperation]: Start removeDead. Operand has 1282 places, 1362 transitions, 3161 flow [2023-08-25 18:09:39,971 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1282 places, 1362 transitions, 3161 flow [2023-08-25 18:09:39,971 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:09:39,971 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1282 places, 1362 transitions, 3161 flow [2023-08-25 18:09:39,971 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1282 places, 1362 transitions, 3161 flow [2023-08-25 18:09:39,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1282 places, 1362 transitions, 3161 flow [2023-08-25 18:09:41,097 INFO L124 PetriNetUnfolderBase]: 214/2459 cut-off events. [2023-08-25 18:09:41,098 INFO L125 PetriNetUnfolderBase]: For 1311/1311 co-relation queries the response was YES. [2023-08-25 18:09:41,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2707 conditions, 2459 events. 214/2459 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 13351 event pairs, 0 based on Foata normal form. 0/2011 useless extension candidates. Maximal degree in co-relation 2535. Up to 40 conditions per place. [2023-08-25 18:09:41,635 INFO L119 LiptonReduction]: Number of co-enabled transitions 1660296 [2023-08-25 18:09:49,911 INFO L134 LiptonReduction]: Checked pairs total: 10079244 [2023-08-25 18:09:49,911 INFO L136 LiptonReduction]: Total number of compositions: 530 [2023-08-25 18:09:49,914 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:09:49,914 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;@4a16ad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:09:49,914 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:09:50,281 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:09:50,281 INFO L124 PetriNetUnfolderBase]: 133/1232 cut-off events. [2023-08-25 18:09:50,281 INFO L125 PetriNetUnfolderBase]: For 1311/1311 co-relation queries the response was YES. [2023-08-25 18:09:50,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:09:50,281 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] [2023-08-25 18:09:50,281 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:09:50,282 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:09:50,282 INFO L85 PathProgramCache]: Analyzing trace with hash -240072194, now seen corresponding path program 1 times [2023-08-25 18:09:50,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:09:50,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660721042] [2023-08-25 18:09:50,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:09:50,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:09:50,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:09:50,316 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:09:50,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:09:50,373 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:09:50,374 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:09:50,374 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:09:50,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-25 18:09:50,374 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:09:50,376 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:09:50,376 WARN L233 ceAbstractionStarter]: 19 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:09:50,376 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 20 thread instances. [2023-08-25 18:09:50,460 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 18:09:50,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1345 places, 1429 transitions, 3338 flow [2023-08-25 18:09:51,795 INFO L124 PetriNetUnfolderBase]: 225/2584 cut-off events. [2023-08-25 18:09:51,796 INFO L125 PetriNetUnfolderBase]: For 1520/1520 co-relation queries the response was YES. [2023-08-25 18:09:51,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2855 conditions, 2584 events. 225/2584 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 14053 event pairs, 0 based on Foata normal form. 0/2113 useless extension candidates. Maximal degree in co-relation 2682. Up to 42 conditions per place. [2023-08-25 18:09:51,982 INFO L82 GeneralOperation]: Start removeDead. Operand has 1345 places, 1429 transitions, 3338 flow [2023-08-25 18:09:52,016 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1345 places, 1429 transitions, 3338 flow [2023-08-25 18:09:52,017 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:09:52,017 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1345 places, 1429 transitions, 3338 flow [2023-08-25 18:09:52,017 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1345 places, 1429 transitions, 3338 flow [2023-08-25 18:09:52,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1345 places, 1429 transitions, 3338 flow [2023-08-25 18:09:53,459 INFO L124 PetriNetUnfolderBase]: 225/2584 cut-off events. [2023-08-25 18:09:53,459 INFO L125 PetriNetUnfolderBase]: For 1520/1520 co-relation queries the response was YES. [2023-08-25 18:09:53,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2855 conditions, 2584 events. 225/2584 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 14053 event pairs, 0 based on Foata normal form. 0/2113 useless extension candidates. Maximal degree in co-relation 2682. Up to 42 conditions per place. [2023-08-25 18:09:54,018 INFO L119 LiptonReduction]: Number of co-enabled transitions 1836120 [2023-08-25 18:10:02,150 INFO L134 LiptonReduction]: Checked pairs total: 11139426 [2023-08-25 18:10:02,151 INFO L136 LiptonReduction]: Total number of compositions: 556 [2023-08-25 18:10:02,152 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:10:02,152 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;@4a16ad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:10:02,152 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:10:02,559 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:10:02,559 INFO L124 PetriNetUnfolderBase]: 141/1303 cut-off events. [2023-08-25 18:10:02,559 INFO L125 PetriNetUnfolderBase]: For 1520/1520 co-relation queries the response was YES. [2023-08-25 18:10:02,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:10:02,559 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] [2023-08-25 18:10:02,559 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:10:02,559 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:10:02,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1759927877, now seen corresponding path program 1 times [2023-08-25 18:10:02,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:10:02,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066878453] [2023-08-25 18:10:02,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:10:02,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:10:02,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:10:02,588 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:10:02,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:10:02,632 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:10:02,632 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:10:02,633 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:10:02,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-25 18:10:02,633 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:10:02,633 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:10:02,633 WARN L233 ceAbstractionStarter]: 20 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:10:02,633 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 21 thread instances. [2023-08-25 18:10:02,722 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 18:10:02,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1408 places, 1496 transitions, 3517 flow [2023-08-25 18:10:04,304 INFO L124 PetriNetUnfolderBase]: 236/2709 cut-off events. [2023-08-25 18:10:04,305 INFO L125 PetriNetUnfolderBase]: For 1750/1750 co-relation queries the response was YES. [2023-08-25 18:10:04,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3004 conditions, 2709 events. 236/2709 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 14789 event pairs, 0 based on Foata normal form. 0/2215 useless extension candidates. Maximal degree in co-relation 2830. Up to 44 conditions per place. [2023-08-25 18:10:04,487 INFO L82 GeneralOperation]: Start removeDead. Operand has 1408 places, 1496 transitions, 3517 flow [2023-08-25 18:10:04,520 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1408 places, 1496 transitions, 3517 flow [2023-08-25 18:10:04,520 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:10:04,520 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1408 places, 1496 transitions, 3517 flow [2023-08-25 18:10:04,520 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1408 places, 1496 transitions, 3517 flow [2023-08-25 18:10:04,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1408 places, 1496 transitions, 3517 flow [2023-08-25 18:10:06,192 INFO L124 PetriNetUnfolderBase]: 236/2709 cut-off events. [2023-08-25 18:10:06,192 INFO L125 PetriNetUnfolderBase]: For 1750/1750 co-relation queries the response was YES. [2023-08-25 18:10:06,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3004 conditions, 2709 events. 236/2709 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 14789 event pairs, 0 based on Foata normal form. 0/2215 useless extension candidates. Maximal degree in co-relation 2830. Up to 44 conditions per place. [2023-08-25 18:10:06,891 INFO L119 LiptonReduction]: Number of co-enabled transitions 2020788 [2023-08-25 18:10:15,516 INFO L134 LiptonReduction]: Checked pairs total: 12278052 [2023-08-25 18:10:15,516 INFO L136 LiptonReduction]: Total number of compositions: 587 [2023-08-25 18:10:15,518 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:10:15,518 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;@4a16ad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:10:15,518 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:10:15,958 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:10:15,959 INFO L124 PetriNetUnfolderBase]: 149/1374 cut-off events. [2023-08-25 18:10:15,959 INFO L125 PetriNetUnfolderBase]: For 1750/1750 co-relation queries the response was YES. [2023-08-25 18:10:15,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:10:15,959 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] [2023-08-25 18:10:15,959 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:10:15,959 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:10:15,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1515289705, now seen corresponding path program 1 times [2023-08-25 18:10:15,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:10:15,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324488064] [2023-08-25 18:10:15,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:10:15,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:10:15,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:10:15,996 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:10:16,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:10:16,040 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:10:16,041 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:10:16,041 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:10:16,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-25 18:10:16,041 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:10:16,041 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:10:16,041 WARN L233 ceAbstractionStarter]: 21 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:10:16,042 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 22 thread instances. [2023-08-25 18:10:16,131 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 18:10:16,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1471 places, 1563 transitions, 3698 flow [2023-08-25 18:10:18,013 INFO L124 PetriNetUnfolderBase]: 247/2834 cut-off events. [2023-08-25 18:10:18,013 INFO L125 PetriNetUnfolderBase]: For 2002/2002 co-relation queries the response was YES. [2023-08-25 18:10:18,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3154 conditions, 2834 events. 247/2834 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 15519 event pairs, 0 based on Foata normal form. 0/2317 useless extension candidates. Maximal degree in co-relation 2979. Up to 46 conditions per place. [2023-08-25 18:10:18,265 INFO L82 GeneralOperation]: Start removeDead. Operand has 1471 places, 1563 transitions, 3698 flow [2023-08-25 18:10:18,297 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1471 places, 1563 transitions, 3698 flow [2023-08-25 18:10:18,297 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:10:18,297 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1471 places, 1563 transitions, 3698 flow [2023-08-25 18:10:18,297 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1471 places, 1563 transitions, 3698 flow [2023-08-25 18:10:18,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1471 places, 1563 transitions, 3698 flow [2023-08-25 18:10:19,957 INFO L124 PetriNetUnfolderBase]: 247/2834 cut-off events. [2023-08-25 18:10:19,957 INFO L125 PetriNetUnfolderBase]: For 2002/2002 co-relation queries the response was YES. [2023-08-25 18:10:20,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3154 conditions, 2834 events. 247/2834 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 15519 event pairs, 0 based on Foata normal form. 0/2317 useless extension candidates. Maximal degree in co-relation 2979. Up to 46 conditions per place. [2023-08-25 18:10:20,750 INFO L119 LiptonReduction]: Number of co-enabled transitions 2214300 [2023-08-25 18:10:29,828 INFO L134 LiptonReduction]: Checked pairs total: 15245967 [2023-08-25 18:10:29,828 INFO L136 LiptonReduction]: Total number of compositions: 614 [2023-08-25 18:10:29,829 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:10:29,829 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;@4a16ad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:10:29,830 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:10:30,286 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:10:30,286 INFO L124 PetriNetUnfolderBase]: 157/1443 cut-off events. [2023-08-25 18:10:30,286 INFO L125 PetriNetUnfolderBase]: For 2002/2002 co-relation queries the response was YES. [2023-08-25 18:10:30,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:10:30,286 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] [2023-08-25 18:10:30,286 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:10:30,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:10:30,287 INFO L85 PathProgramCache]: Analyzing trace with hash 559853356, now seen corresponding path program 1 times [2023-08-25 18:10:30,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:10:30,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471113416] [2023-08-25 18:10:30,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:10:30,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:10:30,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:10:30,320 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:10:30,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:10:30,356 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:10:30,356 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:10:30,356 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:10:30,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-25 18:10:30,356 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:10:30,357 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:10:30,357 WARN L233 ceAbstractionStarter]: 22 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:10:30,357 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 23 thread instances. [2023-08-25 18:10:30,439 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 18:10:30,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1534 places, 1630 transitions, 3881 flow [2023-08-25 18:10:32,177 INFO L124 PetriNetUnfolderBase]: 258/2959 cut-off events. [2023-08-25 18:10:32,177 INFO L125 PetriNetUnfolderBase]: For 2277/2277 co-relation queries the response was YES. [2023-08-25 18:10:32,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3305 conditions, 2959 events. 258/2959 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 16206 event pairs, 0 based on Foata normal form. 0/2419 useless extension candidates. Maximal degree in co-relation 3129. Up to 48 conditions per place. [2023-08-25 18:10:32,482 INFO L82 GeneralOperation]: Start removeDead. Operand has 1534 places, 1630 transitions, 3881 flow [2023-08-25 18:10:32,541 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1534 places, 1630 transitions, 3881 flow [2023-08-25 18:10:32,541 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:10:32,541 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1534 places, 1630 transitions, 3881 flow [2023-08-25 18:10:32,541 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1534 places, 1630 transitions, 3881 flow [2023-08-25 18:10:32,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1534 places, 1630 transitions, 3881 flow [2023-08-25 18:10:34,240 INFO L124 PetriNetUnfolderBase]: 258/2959 cut-off events. [2023-08-25 18:10:34,240 INFO L125 PetriNetUnfolderBase]: For 2277/2277 co-relation queries the response was YES. [2023-08-25 18:10:34,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3305 conditions, 2959 events. 258/2959 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 16206 event pairs, 0 based on Foata normal form. 0/2419 useless extension candidates. Maximal degree in co-relation 3129. Up to 48 conditions per place. [2023-08-25 18:10:35,174 INFO L119 LiptonReduction]: Number of co-enabled transitions 2416656 [2023-08-25 18:10:44,847 INFO L134 LiptonReduction]: Checked pairs total: 14770638 [2023-08-25 18:10:44,847 INFO L136 LiptonReduction]: Total number of compositions: 633 [2023-08-25 18:10:44,848 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:10:44,848 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;@4a16ad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:10:44,848 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:10:45,358 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:10:45,359 INFO L124 PetriNetUnfolderBase]: 165/1514 cut-off events. [2023-08-25 18:10:45,359 INFO L125 PetriNetUnfolderBase]: For 2277/2277 co-relation queries the response was YES. [2023-08-25 18:10:45,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:10:45,359 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] [2023-08-25 18:10:45,359 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:10:45,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:10:45,359 INFO L85 PathProgramCache]: Analyzing trace with hash 138813854, now seen corresponding path program 1 times [2023-08-25 18:10:45,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:10:45,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543129408] [2023-08-25 18:10:45,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:10:45,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:10:45,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:10:45,398 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:10:45,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:10:45,438 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:10:45,438 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:10:45,438 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:10:45,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-25 18:10:45,438 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:10:45,439 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:10:45,439 WARN L233 ceAbstractionStarter]: 23 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:10:45,439 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 24 thread instances. [2023-08-25 18:10:45,518 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 18:10:45,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1597 places, 1697 transitions, 4066 flow [2023-08-25 18:10:47,270 INFO L124 PetriNetUnfolderBase]: 269/3084 cut-off events. [2023-08-25 18:10:47,271 INFO L125 PetriNetUnfolderBase]: For 2576/2576 co-relation queries the response was YES. [2023-08-25 18:10:47,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3457 conditions, 3084 events. 269/3084 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 16826 event pairs, 0 based on Foata normal form. 0/2521 useless extension candidates. Maximal degree in co-relation 3280. Up to 50 conditions per place. [2023-08-25 18:10:47,584 INFO L82 GeneralOperation]: Start removeDead. Operand has 1597 places, 1697 transitions, 4066 flow [2023-08-25 18:10:47,650 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1597 places, 1697 transitions, 4066 flow [2023-08-25 18:10:47,650 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:10:47,650 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1597 places, 1697 transitions, 4066 flow [2023-08-25 18:10:47,650 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1597 places, 1697 transitions, 4066 flow [2023-08-25 18:10:47,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1597 places, 1697 transitions, 4066 flow [2023-08-25 18:10:49,585 INFO L124 PetriNetUnfolderBase]: 269/3084 cut-off events. [2023-08-25 18:10:49,585 INFO L125 PetriNetUnfolderBase]: For 2576/2576 co-relation queries the response was YES. [2023-08-25 18:10:49,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3457 conditions, 3084 events. 269/3084 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 16826 event pairs, 0 based on Foata normal form. 0/2521 useless extension candidates. Maximal degree in co-relation 3280. Up to 50 conditions per place. [2023-08-25 18:10:50,499 INFO L119 LiptonReduction]: Number of co-enabled transitions 2627856 [2023-08-25 18:11:00,220 INFO L134 LiptonReduction]: Checked pairs total: 15978468 [2023-08-25 18:11:00,221 INFO L136 LiptonReduction]: Total number of compositions: 661 [2023-08-25 18:11:00,222 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:11:00,222 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;@4a16ad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:11:00,222 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:11:00,932 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:11:00,932 INFO L124 PetriNetUnfolderBase]: 173/1584 cut-off events. [2023-08-25 18:11:00,932 INFO L125 PetriNetUnfolderBase]: For 2576/2576 co-relation queries the response was YES. [2023-08-25 18:11:00,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:11:00,932 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] [2023-08-25 18:11:00,932 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:11:00,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:11:00,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1527675486, now seen corresponding path program 1 times [2023-08-25 18:11:00,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:11:00,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106856911] [2023-08-25 18:11:00,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:11:00,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:11:00,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:11:00,974 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:11:01,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:11:01,025 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:11:01,025 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:11:01,026 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:11:01,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-25 18:11:01,026 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:11:01,026 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:11:01,026 WARN L233 ceAbstractionStarter]: 24 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:11:01,026 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 25 thread instances. [2023-08-25 18:11:01,118 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 18:11:01,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1660 places, 1764 transitions, 4253 flow [2023-08-25 18:11:03,099 INFO L124 PetriNetUnfolderBase]: 280/3209 cut-off events. [2023-08-25 18:11:03,099 INFO L125 PetriNetUnfolderBase]: For 2900/2900 co-relation queries the response was YES. [2023-08-25 18:11:03,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3610 conditions, 3209 events. 280/3209 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 17619 event pairs, 0 based on Foata normal form. 0/2623 useless extension candidates. Maximal degree in co-relation 3432. Up to 52 conditions per place. [2023-08-25 18:11:03,465 INFO L82 GeneralOperation]: Start removeDead. Operand has 1660 places, 1764 transitions, 4253 flow [2023-08-25 18:11:03,553 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1660 places, 1764 transitions, 4253 flow [2023-08-25 18:11:03,553 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:11:03,553 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1660 places, 1764 transitions, 4253 flow [2023-08-25 18:11:03,554 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1660 places, 1764 transitions, 4253 flow [2023-08-25 18:11:03,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1660 places, 1764 transitions, 4253 flow [2023-08-25 18:11:05,437 INFO L124 PetriNetUnfolderBase]: 280/3209 cut-off events. [2023-08-25 18:11:05,438 INFO L125 PetriNetUnfolderBase]: For 2900/2900 co-relation queries the response was YES. [2023-08-25 18:11:05,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3610 conditions, 3209 events. 280/3209 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 17619 event pairs, 0 based on Foata normal form. 0/2623 useless extension candidates. Maximal degree in co-relation 3432. Up to 52 conditions per place. [2023-08-25 18:11:06,585 INFO L119 LiptonReduction]: Number of co-enabled transitions 2847900 [2023-08-25 18:11:16,893 INFO L134 LiptonReduction]: Checked pairs total: 17370612 [2023-08-25 18:11:16,893 INFO L136 LiptonReduction]: Total number of compositions: 679 [2023-08-25 18:11:16,895 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:11:16,895 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;@4a16ad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:11:16,895 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:11:17,536 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:11:17,536 INFO L124 PetriNetUnfolderBase]: 181/1654 cut-off events. [2023-08-25 18:11:17,536 INFO L125 PetriNetUnfolderBase]: For 2900/2900 co-relation queries the response was YES. [2023-08-25 18:11:17,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:11:17,536 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] [2023-08-25 18:11:17,536 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:11:17,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:11:17,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1352970682, now seen corresponding path program 1 times [2023-08-25 18:11:17,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:11:17,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354267897] [2023-08-25 18:11:17,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:11:17,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:11:17,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:11:17,576 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:11:17,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:11:17,620 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:11:17,621 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:11:17,621 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:11:17,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-25 18:11:17,621 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:11:17,621 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:11:17,622 WARN L233 ceAbstractionStarter]: 25 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:11:17,622 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 26 thread instances. [2023-08-25 18:11:17,724 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 18:11:17,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1723 places, 1831 transitions, 4442 flow [2023-08-25 18:11:19,836 INFO L124 PetriNetUnfolderBase]: 291/3334 cut-off events. [2023-08-25 18:11:19,836 INFO L125 PetriNetUnfolderBase]: For 3250/3250 co-relation queries the response was YES. [2023-08-25 18:11:20,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3764 conditions, 3334 events. 291/3334 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 18325 event pairs, 0 based on Foata normal form. 0/2725 useless extension candidates. Maximal degree in co-relation 3585. Up to 54 conditions per place. [2023-08-25 18:11:20,246 INFO L82 GeneralOperation]: Start removeDead. Operand has 1723 places, 1831 transitions, 4442 flow [2023-08-25 18:11:20,319 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1723 places, 1831 transitions, 4442 flow [2023-08-25 18:11:20,319 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:11:20,319 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1723 places, 1831 transitions, 4442 flow [2023-08-25 18:11:20,319 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1723 places, 1831 transitions, 4442 flow [2023-08-25 18:11:20,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1723 places, 1831 transitions, 4442 flow [2023-08-25 18:11:22,327 INFO L124 PetriNetUnfolderBase]: 291/3334 cut-off events. [2023-08-25 18:11:22,328 INFO L125 PetriNetUnfolderBase]: For 3250/3250 co-relation queries the response was YES. [2023-08-25 18:11:22,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3764 conditions, 3334 events. 291/3334 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 18325 event pairs, 0 based on Foata normal form. 0/2725 useless extension candidates. Maximal degree in co-relation 3585. Up to 54 conditions per place. [2023-08-25 18:11:23,678 INFO L119 LiptonReduction]: Number of co-enabled transitions 3076788 [2023-08-25 18:11:34,100 INFO L134 LiptonReduction]: Checked pairs total: 18726848 [2023-08-25 18:11:34,100 INFO L136 LiptonReduction]: Total number of compositions: 699 [2023-08-25 18:11:34,102 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:11:34,102 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;@4a16ad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:11:34,102 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:11:34,740 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:11:34,740 INFO L124 PetriNetUnfolderBase]: 189/1724 cut-off events. [2023-08-25 18:11:34,740 INFO L125 PetriNetUnfolderBase]: For 3250/3250 co-relation queries the response was YES. [2023-08-25 18:11:34,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:11:34,740 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] [2023-08-25 18:11:34,740 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:11:34,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:11:34,741 INFO L85 PathProgramCache]: Analyzing trace with hash -606327013, now seen corresponding path program 1 times [2023-08-25 18:11:34,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:11:34,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729756273] [2023-08-25 18:11:34,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:11:34,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:11:34,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:11:34,783 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:11:34,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:11:34,825 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:11:34,825 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:11:34,825 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:11:34,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-25 18:11:34,825 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:11:34,826 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:11:34,826 WARN L233 ceAbstractionStarter]: 26 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:11:34,826 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 27 thread instances. [2023-08-25 18:11:34,938 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 18:11:34,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1786 places, 1898 transitions, 4633 flow [2023-08-25 18:11:37,626 INFO L124 PetriNetUnfolderBase]: 302/3459 cut-off events. [2023-08-25 18:11:37,626 INFO L125 PetriNetUnfolderBase]: For 3627/3627 co-relation queries the response was YES. [2023-08-25 18:11:37,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3919 conditions, 3459 events. 302/3459 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 18969 event pairs, 0 based on Foata normal form. 0/2827 useless extension candidates. Maximal degree in co-relation 3739. Up to 56 conditions per place. [2023-08-25 18:11:37,865 INFO L82 GeneralOperation]: Start removeDead. Operand has 1786 places, 1898 transitions, 4633 flow [2023-08-25 18:11:37,908 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1786 places, 1898 transitions, 4633 flow [2023-08-25 18:11:37,908 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:11:37,909 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1786 places, 1898 transitions, 4633 flow [2023-08-25 18:11:37,909 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1786 places, 1898 transitions, 4633 flow [2023-08-25 18:11:37,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1786 places, 1898 transitions, 4633 flow [2023-08-25 18:11:40,560 INFO L124 PetriNetUnfolderBase]: 302/3459 cut-off events. [2023-08-25 18:11:40,560 INFO L125 PetriNetUnfolderBase]: For 3627/3627 co-relation queries the response was YES. [2023-08-25 18:11:40,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3919 conditions, 3459 events. 302/3459 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 18969 event pairs, 0 based on Foata normal form. 0/2827 useless extension candidates. Maximal degree in co-relation 3739. Up to 56 conditions per place. [2023-08-25 18:11:41,725 INFO L119 LiptonReduction]: Number of co-enabled transitions 3314520 [2023-08-25 18:11:52,657 INFO L134 LiptonReduction]: Checked pairs total: 20231452 [2023-08-25 18:11:52,657 INFO L136 LiptonReduction]: Total number of compositions: 726 [2023-08-25 18:11:52,658 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:11:52,658 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;@4a16ad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:11:52,659 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:11:53,429 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:11:53,429 INFO L124 PetriNetUnfolderBase]: 197/1794 cut-off events. [2023-08-25 18:11:53,429 INFO L125 PetriNetUnfolderBase]: For 3627/3627 co-relation queries the response was YES. [2023-08-25 18:11:53,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:11:53,430 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] [2023-08-25 18:11:53,430 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:11:53,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:11:53,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1234897488, now seen corresponding path program 1 times [2023-08-25 18:11:53,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:11:53,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205753798] [2023-08-25 18:11:53,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:11:53,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:11:53,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:11:53,472 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:11:53,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:11:53,518 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:11:53,518 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:11:53,518 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:11:53,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-25 18:11:53,519 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:11:53,519 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:11:53,519 WARN L233 ceAbstractionStarter]: 27 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:11:53,519 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 28 thread instances. [2023-08-25 18:11:53,683 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 18:11:53,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1849 places, 1965 transitions, 4826 flow [2023-08-25 18:11:56,535 INFO L124 PetriNetUnfolderBase]: 313/3584 cut-off events. [2023-08-25 18:11:56,535 INFO L125 PetriNetUnfolderBase]: For 4032/4032 co-relation queries the response was YES. [2023-08-25 18:11:56,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4075 conditions, 3584 events. 313/3584 cut-off events. For 4032/4032 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 19684 event pairs, 0 based on Foata normal form. 0/2929 useless extension candidates. Maximal degree in co-relation 3894. Up to 58 conditions per place. [2023-08-25 18:11:56,802 INFO L82 GeneralOperation]: Start removeDead. Operand has 1849 places, 1965 transitions, 4826 flow [2023-08-25 18:11:56,850 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1849 places, 1965 transitions, 4826 flow [2023-08-25 18:11:56,850 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:11:56,850 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1849 places, 1965 transitions, 4826 flow [2023-08-25 18:11:56,850 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1849 places, 1965 transitions, 4826 flow [2023-08-25 18:11:56,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1849 places, 1965 transitions, 4826 flow [2023-08-25 18:11:59,591 INFO L124 PetriNetUnfolderBase]: 313/3584 cut-off events. [2023-08-25 18:11:59,592 INFO L125 PetriNetUnfolderBase]: For 4032/4032 co-relation queries the response was YES. [2023-08-25 18:11:59,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4075 conditions, 3584 events. 313/3584 cut-off events. For 4032/4032 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 19684 event pairs, 0 based on Foata normal form. 0/2929 useless extension candidates. Maximal degree in co-relation 3894. Up to 58 conditions per place. [2023-08-25 18:12:00,970 INFO L119 LiptonReduction]: Number of co-enabled transitions 3561096 [2023-08-25 18:12:12,509 INFO L134 LiptonReduction]: Checked pairs total: 21769501 [2023-08-25 18:12:12,510 INFO L136 LiptonReduction]: Total number of compositions: 752 [2023-08-25 18:12:12,511 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:12:12,511 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;@4a16ad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:12:12,511 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:12:13,380 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:12:13,380 INFO L124 PetriNetUnfolderBase]: 205/1864 cut-off events. [2023-08-25 18:12:13,380 INFO L125 PetriNetUnfolderBase]: For 4032/4032 co-relation queries the response was YES. [2023-08-25 18:12:13,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:12:13,380 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] [2023-08-25 18:12:13,381 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:12:13,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:12:13,381 INFO L85 PathProgramCache]: Analyzing trace with hash -629050234, now seen corresponding path program 1 times [2023-08-25 18:12:13,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:12:13,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895242915] [2023-08-25 18:12:13,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:12:13,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:12:13,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:12:13,417 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:12:13,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:12:13,469 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:12:13,469 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:12:13,469 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:12:13,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-25 18:12:13,470 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:12:13,470 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:12:13,470 WARN L233 ceAbstractionStarter]: 28 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:12:13,470 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 29 thread instances. [2023-08-25 18:12:13,568 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 18:12:13,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1912 places, 2032 transitions, 5021 flow [2023-08-25 18:12:16,498 INFO L124 PetriNetUnfolderBase]: 324/3709 cut-off events. [2023-08-25 18:12:16,499 INFO L125 PetriNetUnfolderBase]: For 4466/4466 co-relation queries the response was YES. [2023-08-25 18:12:16,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4232 conditions, 3709 events. 324/3709 cut-off events. For 4466/4466 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 20387 event pairs, 0 based on Foata normal form. 0/3031 useless extension candidates. Maximal degree in co-relation 4050. Up to 60 conditions per place. [2023-08-25 18:12:16,782 INFO L82 GeneralOperation]: Start removeDead. Operand has 1912 places, 2032 transitions, 5021 flow [2023-08-25 18:12:16,832 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1912 places, 2032 transitions, 5021 flow [2023-08-25 18:12:16,833 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:12:16,833 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1912 places, 2032 transitions, 5021 flow [2023-08-25 18:12:16,833 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1912 places, 2032 transitions, 5021 flow [2023-08-25 18:12:16,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1912 places, 2032 transitions, 5021 flow [2023-08-25 18:12:19,742 INFO L124 PetriNetUnfolderBase]: 324/3709 cut-off events. [2023-08-25 18:12:19,742 INFO L125 PetriNetUnfolderBase]: For 4466/4466 co-relation queries the response was YES. [2023-08-25 18:12:20,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4232 conditions, 3709 events. 324/3709 cut-off events. For 4466/4466 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 20387 event pairs, 0 based on Foata normal form. 0/3031 useless extension candidates. Maximal degree in co-relation 4050. Up to 60 conditions per place. [2023-08-25 18:12:21,099 INFO L119 LiptonReduction]: Number of co-enabled transitions 3816516 [2023-08-25 18:12:33,276 INFO L134 LiptonReduction]: Checked pairs total: 26395337 [2023-08-25 18:12:33,276 INFO L136 LiptonReduction]: Total number of compositions: 771 [2023-08-25 18:12:33,277 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:12:33,278 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;@4a16ad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:12:33,278 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:12:34,157 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:12:34,157 INFO L124 PetriNetUnfolderBase]: 213/1934 cut-off events. [2023-08-25 18:12:34,157 INFO L125 PetriNetUnfolderBase]: For 4466/4466 co-relation queries the response was YES. [2023-08-25 18:12:34,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:12:34,158 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] [2023-08-25 18:12:34,158 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:12:34,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:12:34,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1832418674, now seen corresponding path program 1 times [2023-08-25 18:12:34,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:12:34,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261312512] [2023-08-25 18:12:34,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:12:34,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:12:34,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:12:34,197 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:12:34,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:12:34,244 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:12:34,245 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:12:34,245 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:12:34,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-25 18:12:34,245 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:12:34,246 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:12:34,246 WARN L233 ceAbstractionStarter]: 29 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:12:34,246 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 30 thread instances. [2023-08-25 18:12:34,366 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 18:12:34,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1975 places, 2099 transitions, 5218 flow [2023-08-25 18:12:37,571 INFO L124 PetriNetUnfolderBase]: 335/3834 cut-off events. [2023-08-25 18:12:37,571 INFO L125 PetriNetUnfolderBase]: For 4930/4930 co-relation queries the response was YES. [2023-08-25 18:12:37,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4390 conditions, 3834 events. 335/3834 cut-off events. For 4930/4930 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 21105 event pairs, 0 based on Foata normal form. 0/3133 useless extension candidates. Maximal degree in co-relation 4207. Up to 62 conditions per place. [2023-08-25 18:12:37,892 INFO L82 GeneralOperation]: Start removeDead. Operand has 1975 places, 2099 transitions, 5218 flow [2023-08-25 18:12:38,094 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1975 places, 2099 transitions, 5218 flow [2023-08-25 18:12:38,094 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:12:38,094 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1975 places, 2099 transitions, 5218 flow [2023-08-25 18:12:38,094 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1975 places, 2099 transitions, 5218 flow [2023-08-25 18:12:38,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1975 places, 2099 transitions, 5218 flow [2023-08-25 18:12:41,231 INFO L124 PetriNetUnfolderBase]: 335/3834 cut-off events. [2023-08-25 18:12:41,231 INFO L125 PetriNetUnfolderBase]: For 4930/4930 co-relation queries the response was YES. [2023-08-25 18:12:41,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4390 conditions, 3834 events. 335/3834 cut-off events. For 4930/4930 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 21105 event pairs, 0 based on Foata normal form. 0/3133 useless extension candidates. Maximal degree in co-relation 4207. Up to 62 conditions per place. [2023-08-25 18:12:42,682 INFO L119 LiptonReduction]: Number of co-enabled transitions 4080780 [2023-08-25 18:12:55,448 INFO L134 LiptonReduction]: Checked pairs total: 25062272 [2023-08-25 18:12:55,448 INFO L136 LiptonReduction]: Total number of compositions: 797 [2023-08-25 18:12:55,449 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:12:55,450 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;@4a16ad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:12:55,450 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:12:56,452 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:12:56,452 INFO L124 PetriNetUnfolderBase]: 221/2004 cut-off events. [2023-08-25 18:12:56,452 INFO L125 PetriNetUnfolderBase]: For 4930/4930 co-relation queries the response was YES. [2023-08-25 18:12:56,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:12:56,453 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] [2023-08-25 18:12:56,453 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:12:56,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:12:56,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1689827958, now seen corresponding path program 1 times [2023-08-25 18:12:56,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:12:56,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957280656] [2023-08-25 18:12:56,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:12:56,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:12:56,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:12:56,498 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:12:56,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:12:56,547 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:12:56,547 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:12:56,548 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:12:56,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-08-25 18:12:56,548 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:12:56,548 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:12:56,548 WARN L233 ceAbstractionStarter]: 30 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:12:56,548 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 31 thread instances. [2023-08-25 18:12:56,695 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 18:12:56,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2038 places, 2166 transitions, 5417 flow [2023-08-25 18:13:00,059 INFO L124 PetriNetUnfolderBase]: 346/3959 cut-off events. [2023-08-25 18:13:00,059 INFO L125 PetriNetUnfolderBase]: For 5425/5425 co-relation queries the response was YES. [2023-08-25 18:13:00,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4549 conditions, 3959 events. 346/3959 cut-off events. For 5425/5425 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 21828 event pairs, 0 based on Foata normal form. 0/3235 useless extension candidates. Maximal degree in co-relation 4365. Up to 64 conditions per place. [2023-08-25 18:13:00,390 INFO L82 GeneralOperation]: Start removeDead. Operand has 2038 places, 2166 transitions, 5417 flow [2023-08-25 18:13:00,450 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2038 places, 2166 transitions, 5417 flow [2023-08-25 18:13:00,450 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:13:00,451 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2038 places, 2166 transitions, 5417 flow [2023-08-25 18:13:00,451 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2038 places, 2166 transitions, 5417 flow [2023-08-25 18:13:00,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2038 places, 2166 transitions, 5417 flow [2023-08-25 18:13:03,819 INFO L124 PetriNetUnfolderBase]: 346/3959 cut-off events. [2023-08-25 18:13:03,819 INFO L125 PetriNetUnfolderBase]: For 5425/5425 co-relation queries the response was YES. [2023-08-25 18:13:04,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4549 conditions, 3959 events. 346/3959 cut-off events. For 5425/5425 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 21828 event pairs, 0 based on Foata normal form. 0/3235 useless extension candidates. Maximal degree in co-relation 4365. Up to 64 conditions per place. [2023-08-25 18:13:05,594 INFO L119 LiptonReduction]: Number of co-enabled transitions 4353888 [2023-08-25 18:13:18,454 INFO L134 LiptonReduction]: Checked pairs total: 26756068 [2023-08-25 18:13:18,454 INFO L136 LiptonReduction]: Total number of compositions: 824 [2023-08-25 18:13:18,455 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:13:18,455 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;@4a16ad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:13:18,455 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:13:19,468 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:13:19,468 INFO L124 PetriNetUnfolderBase]: 229/2074 cut-off events. [2023-08-25 18:13:19,468 INFO L125 PetriNetUnfolderBase]: For 5425/5425 co-relation queries the response was YES. [2023-08-25 18:13:19,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:13:19,468 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] [2023-08-25 18:13:19,468 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:13:19,468 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:13:19,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1323573890, now seen corresponding path program 1 times [2023-08-25 18:13:19,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:13:19,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066372943] [2023-08-25 18:13:19,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:13:19,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:13:19,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:13:19,515 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:13:19,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:13:19,564 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:13:19,565 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:13:19,565 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:13:19,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-08-25 18:13:19,565 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:13:19,565 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:13:19,566 WARN L233 ceAbstractionStarter]: 31 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:13:19,566 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 32 thread instances. [2023-08-25 18:13:19,703 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 18:13:19,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2101 places, 2233 transitions, 5618 flow [2023-08-25 18:13:23,260 INFO L124 PetriNetUnfolderBase]: 357/4084 cut-off events. [2023-08-25 18:13:23,260 INFO L125 PetriNetUnfolderBase]: For 5952/5952 co-relation queries the response was YES. [2023-08-25 18:13:23,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4709 conditions, 4084 events. 357/4084 cut-off events. For 5952/5952 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 22511 event pairs, 0 based on Foata normal form. 0/3337 useless extension candidates. Maximal degree in co-relation 4524. Up to 66 conditions per place. [2023-08-25 18:13:23,617 INFO L82 GeneralOperation]: Start removeDead. Operand has 2101 places, 2233 transitions, 5618 flow [2023-08-25 18:13:23,682 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2101 places, 2233 transitions, 5618 flow [2023-08-25 18:13:23,682 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:13:23,683 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2101 places, 2233 transitions, 5618 flow [2023-08-25 18:13:23,683 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2101 places, 2233 transitions, 5618 flow [2023-08-25 18:13:23,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2101 places, 2233 transitions, 5618 flow [2023-08-25 18:13:27,844 INFO L124 PetriNetUnfolderBase]: 357/4084 cut-off events. [2023-08-25 18:13:27,844 INFO L125 PetriNetUnfolderBase]: For 5952/5952 co-relation queries the response was YES. [2023-08-25 18:13:28,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4709 conditions, 4084 events. 357/4084 cut-off events. For 5952/5952 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 22511 event pairs, 0 based on Foata normal form. 0/3337 useless extension candidates. Maximal degree in co-relation 4524. Up to 66 conditions per place. [2023-08-25 18:13:29,789 INFO L119 LiptonReduction]: Number of co-enabled transitions 4635840 [2023-08-25 18:13:42,615 INFO L134 LiptonReduction]: Checked pairs total: 32255814 [2023-08-25 18:13:42,615 INFO L136 LiptonReduction]: Total number of compositions: 840 [2023-08-25 18:13:42,617 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:13:42,617 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;@4a16ad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:13:42,617 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:13:43,740 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:13:43,740 INFO L124 PetriNetUnfolderBase]: 237/2144 cut-off events. [2023-08-25 18:13:43,740 INFO L125 PetriNetUnfolderBase]: For 5952/5952 co-relation queries the response was YES. [2023-08-25 18:13:43,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:13:43,740 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] [2023-08-25 18:13:43,740 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:13:43,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:13:43,741 INFO L85 PathProgramCache]: Analyzing trace with hash 914289236, now seen corresponding path program 1 times [2023-08-25 18:13:43,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:13:43,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464939100] [2023-08-25 18:13:43,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:13:43,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:13:43,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:13:43,809 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:13:43,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:13:43,870 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:13:43,870 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:13:43,871 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:13:43,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-08-25 18:13:43,871 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:13:43,871 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:13:43,872 WARN L233 ceAbstractionStarter]: 32 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:13:43,872 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 33 thread instances. [2023-08-25 18:13:43,998 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 18:13:44,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2164 places, 2300 transitions, 5821 flow [2023-08-25 18:13:47,817 INFO L124 PetriNetUnfolderBase]: 368/4209 cut-off events. [2023-08-25 18:13:47,818 INFO L125 PetriNetUnfolderBase]: For 6512/6512 co-relation queries the response was YES. [2023-08-25 18:13:48,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4870 conditions, 4209 events. 368/4209 cut-off events. For 6512/6512 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 23219 event pairs, 0 based on Foata normal form. 0/3439 useless extension candidates. Maximal degree in co-relation 4684. Up to 68 conditions per place. [2023-08-25 18:13:48,187 INFO L82 GeneralOperation]: Start removeDead. Operand has 2164 places, 2300 transitions, 5821 flow [2023-08-25 18:13:48,250 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2164 places, 2300 transitions, 5821 flow [2023-08-25 18:13:48,250 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:13:48,250 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2164 places, 2300 transitions, 5821 flow [2023-08-25 18:13:48,250 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2164 places, 2300 transitions, 5821 flow [2023-08-25 18:13:48,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2164 places, 2300 transitions, 5821 flow [2023-08-25 18:13:52,115 INFO L124 PetriNetUnfolderBase]: 368/4209 cut-off events. [2023-08-25 18:13:52,115 INFO L125 PetriNetUnfolderBase]: For 6512/6512 co-relation queries the response was YES. [2023-08-25 18:13:52,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4870 conditions, 4209 events. 368/4209 cut-off events. For 6512/6512 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 23219 event pairs, 0 based on Foata normal form. 0/3439 useless extension candidates. Maximal degree in co-relation 4684. Up to 68 conditions per place. [2023-08-25 18:13:53,921 INFO L119 LiptonReduction]: Number of co-enabled transitions 4926636 [2023-08-25 18:14:07,852 INFO L134 LiptonReduction]: Checked pairs total: 34203634 [2023-08-25 18:14:07,852 INFO L136 LiptonReduction]: Total number of compositions: 862 [2023-08-25 18:14:07,854 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:14:07,854 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;@4a16ad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:14:07,854 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:14:09,076 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:14:09,076 INFO L124 PetriNetUnfolderBase]: 245/2214 cut-off events. [2023-08-25 18:14:09,077 INFO L125 PetriNetUnfolderBase]: For 6512/6512 co-relation queries the response was YES. [2023-08-25 18:14:09,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:14:09,077 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] [2023-08-25 18:14:09,077 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:14:09,077 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:14:09,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1163830901, now seen corresponding path program 1 times [2023-08-25 18:14:09,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:14:09,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346387315] [2023-08-25 18:14:09,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:14:09,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:14:09,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:14:09,125 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:14:09,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:14:09,183 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:14:09,183 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:14:09,184 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:14:09,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-08-25 18:14:09,184 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:14:09,184 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:14:09,184 WARN L233 ceAbstractionStarter]: 33 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:14:09,184 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 34 thread instances. [2023-08-25 18:14:09,303 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 18:14:09,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2227 places, 2367 transitions, 6026 flow [2023-08-25 18:14:13,705 INFO L124 PetriNetUnfolderBase]: 379/4334 cut-off events. [2023-08-25 18:14:13,706 INFO L125 PetriNetUnfolderBase]: For 7106/7106 co-relation queries the response was YES. [2023-08-25 18:14:14,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5032 conditions, 4334 events. 379/4334 cut-off events. For 7106/7106 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 23916 event pairs, 0 based on Foata normal form. 0/3541 useless extension candidates. Maximal degree in co-relation 4845. Up to 70 conditions per place. [2023-08-25 18:14:14,077 INFO L82 GeneralOperation]: Start removeDead. Operand has 2227 places, 2367 transitions, 6026 flow [2023-08-25 18:14:14,142 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2227 places, 2367 transitions, 6026 flow [2023-08-25 18:14:14,142 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:14:14,142 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2227 places, 2367 transitions, 6026 flow [2023-08-25 18:14:14,142 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2227 places, 2367 transitions, 6026 flow [2023-08-25 18:14:14,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2227 places, 2367 transitions, 6026 flow [2023-08-25 18:14:18,222 INFO L124 PetriNetUnfolderBase]: 379/4334 cut-off events. [2023-08-25 18:14:18,223 INFO L125 PetriNetUnfolderBase]: For 7106/7106 co-relation queries the response was YES. [2023-08-25 18:14:18,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5032 conditions, 4334 events. 379/4334 cut-off events. For 7106/7106 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 23916 event pairs, 0 based on Foata normal form. 0/3541 useless extension candidates. Maximal degree in co-relation 4845. Up to 70 conditions per place. [2023-08-25 18:14:20,102 INFO L119 LiptonReduction]: Number of co-enabled transitions 5226276 [2023-08-25 18:14:34,748 INFO L134 LiptonReduction]: Checked pairs total: 36440651 [2023-08-25 18:14:34,748 INFO L136 LiptonReduction]: Total number of compositions: 893 [2023-08-25 18:14:34,750 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:14:34,750 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;@4a16ad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:14:34,750 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:14:36,038 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:14:36,039 INFO L124 PetriNetUnfolderBase]: 253/2284 cut-off events. [2023-08-25 18:14:36,039 INFO L125 PetriNetUnfolderBase]: For 7106/7106 co-relation queries the response was YES. [2023-08-25 18:14:36,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:14:36,039 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] [2023-08-25 18:14:36,039 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:14:36,039 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:14:36,039 INFO L85 PathProgramCache]: Analyzing trace with hash 311849214, now seen corresponding path program 1 times [2023-08-25 18:14:36,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:14:36,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911151226] [2023-08-25 18:14:36,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:14:36,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:14:36,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:14:36,082 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:14:36,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:14:36,139 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:14:36,139 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:14:36,139 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:14:36,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-08-25 18:14:36,140 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:14:36,140 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:14:36,140 WARN L233 ceAbstractionStarter]: 34 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:14:36,140 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 35 thread instances. [2023-08-25 18:14:36,273 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 18:14:36,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2290 places, 2434 transitions, 6233 flow [2023-08-25 18:14:40,772 INFO L124 PetriNetUnfolderBase]: 390/4459 cut-off events. [2023-08-25 18:14:40,773 INFO L125 PetriNetUnfolderBase]: For 7735/7735 co-relation queries the response was YES. [2023-08-25 18:14:41,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5195 conditions, 4459 events. 390/4459 cut-off events. For 7735/7735 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 24659 event pairs, 0 based on Foata normal form. 0/3643 useless extension candidates. Maximal degree in co-relation 5007. Up to 72 conditions per place. [2023-08-25 18:14:41,180 INFO L82 GeneralOperation]: Start removeDead. Operand has 2290 places, 2434 transitions, 6233 flow [2023-08-25 18:14:41,250 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2290 places, 2434 transitions, 6233 flow [2023-08-25 18:14:41,250 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:14:41,250 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2290 places, 2434 transitions, 6233 flow [2023-08-25 18:14:41,250 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2290 places, 2434 transitions, 6233 flow [2023-08-25 18:14:41,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2290 places, 2434 transitions, 6233 flow [2023-08-25 18:14:45,545 INFO L124 PetriNetUnfolderBase]: 390/4459 cut-off events. [2023-08-25 18:14:45,545 INFO L125 PetriNetUnfolderBase]: For 7735/7735 co-relation queries the response was YES. [2023-08-25 18:14:45,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5195 conditions, 4459 events. 390/4459 cut-off events. For 7735/7735 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 24659 event pairs, 0 based on Foata normal form. 0/3643 useless extension candidates. Maximal degree in co-relation 5007. Up to 72 conditions per place. [2023-08-25 18:14:47,572 INFO L119 LiptonReduction]: Number of co-enabled transitions 5534760 [2023-08-25 18:15:02,940 INFO L134 LiptonReduction]: Checked pairs total: 34115218 [2023-08-25 18:15:02,941 INFO L136 LiptonReduction]: Total number of compositions: 919 [2023-08-25 18:15:02,942 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:15:02,942 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;@4a16ad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:15:02,942 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:15:04,478 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:15:04,479 INFO L124 PetriNetUnfolderBase]: 261/2354 cut-off events. [2023-08-25 18:15:04,479 INFO L125 PetriNetUnfolderBase]: For 7735/7735 co-relation queries the response was YES. [2023-08-25 18:15:04,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:15:04,479 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] [2023-08-25 18:15:04,479 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:15:04,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:15:04,479 INFO L85 PathProgramCache]: Analyzing trace with hash 789338014, now seen corresponding path program 1 times [2023-08-25 18:15:04,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:15:04,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628054003] [2023-08-25 18:15:04,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:15:04,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:15:04,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:15:04,525 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:15:04,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:15:04,583 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:15:04,583 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:15:04,583 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:15:04,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-08-25 18:15:04,584 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:15:04,584 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:15:04,584 WARN L233 ceAbstractionStarter]: 35 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:15:04,584 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 36 thread instances. [2023-08-25 18:15:04,726 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 18:15:04,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2353 places, 2501 transitions, 6442 flow [2023-08-25 18:15:09,432 INFO L124 PetriNetUnfolderBase]: 401/4584 cut-off events. [2023-08-25 18:15:09,432 INFO L125 PetriNetUnfolderBase]: For 8400/8400 co-relation queries the response was YES. [2023-08-25 18:15:09,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5359 conditions, 4584 events. 401/4584 cut-off events. For 8400/8400 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 25316 event pairs, 0 based on Foata normal form. 0/3745 useless extension candidates. Maximal degree in co-relation 5170. Up to 74 conditions per place. [2023-08-25 18:15:09,922 INFO L82 GeneralOperation]: Start removeDead. Operand has 2353 places, 2501 transitions, 6442 flow [2023-08-25 18:15:10,232 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2353 places, 2501 transitions, 6442 flow [2023-08-25 18:15:10,233 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:15:10,233 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2353 places, 2501 transitions, 6442 flow [2023-08-25 18:15:10,233 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2353 places, 2501 transitions, 6442 flow [2023-08-25 18:15:10,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2353 places, 2501 transitions, 6442 flow [2023-08-25 18:15:14,862 INFO L124 PetriNetUnfolderBase]: 401/4584 cut-off events. [2023-08-25 18:15:14,862 INFO L125 PetriNetUnfolderBase]: For 8400/8400 co-relation queries the response was YES. [2023-08-25 18:15:15,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5359 conditions, 4584 events. 401/4584 cut-off events. For 8400/8400 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 25316 event pairs, 0 based on Foata normal form. 0/3745 useless extension candidates. Maximal degree in co-relation 5170. Up to 74 conditions per place. [2023-08-25 18:15:17,600 INFO L119 LiptonReduction]: Number of co-enabled transitions 5852088 [2023-08-25 18:15:34,045 INFO L134 LiptonReduction]: Checked pairs total: 35955873 [2023-08-25 18:15:34,045 INFO L136 LiptonReduction]: Total number of compositions: 937 [2023-08-25 18:15:34,047 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:15:34,047 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;@4a16ad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:15:34,047 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:15:35,655 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:15:35,655 INFO L124 PetriNetUnfolderBase]: 269/2424 cut-off events. [2023-08-25 18:15:35,656 INFO L125 PetriNetUnfolderBase]: For 8400/8400 co-relation queries the response was YES. [2023-08-25 18:15:35,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:15:35,656 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] [2023-08-25 18:15:35,656 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:15:35,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:15:35,656 INFO L85 PathProgramCache]: Analyzing trace with hash -353944697, now seen corresponding path program 1 times [2023-08-25 18:15:35,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:15:35,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799247934] [2023-08-25 18:15:35,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:15:35,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:15:35,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:15:35,713 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:15:35,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:15:35,780 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:15:35,780 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:15:35,780 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:15:35,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-08-25 18:15:35,780 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:15:35,780 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:15:35,781 WARN L233 ceAbstractionStarter]: 36 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:15:35,781 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 37 thread instances. [2023-08-25 18:15:35,929 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 18:15:35,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2416 places, 2568 transitions, 6653 flow [2023-08-25 18:15:41,027 INFO L124 PetriNetUnfolderBase]: 412/4709 cut-off events. [2023-08-25 18:15:41,027 INFO L125 PetriNetUnfolderBase]: For 9102/9102 co-relation queries the response was YES. [2023-08-25 18:15:41,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5524 conditions, 4709 events. 412/4709 cut-off events. For 9102/9102 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 26050 event pairs, 0 based on Foata normal form. 0/3847 useless extension candidates. Maximal degree in co-relation 5334. Up to 76 conditions per place. [2023-08-25 18:15:41,507 INFO L82 GeneralOperation]: Start removeDead. Operand has 2416 places, 2568 transitions, 6653 flow [2023-08-25 18:15:41,593 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2416 places, 2568 transitions, 6653 flow [2023-08-25 18:15:41,594 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:15:41,594 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2416 places, 2568 transitions, 6653 flow [2023-08-25 18:15:41,594 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2416 places, 2568 transitions, 6653 flow [2023-08-25 18:15:41,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2416 places, 2568 transitions, 6653 flow [2023-08-25 18:15:46,709 INFO L124 PetriNetUnfolderBase]: 412/4709 cut-off events. [2023-08-25 18:15:46,709 INFO L125 PetriNetUnfolderBase]: For 9102/9102 co-relation queries the response was YES. [2023-08-25 18:15:47,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5524 conditions, 4709 events. 412/4709 cut-off events. For 9102/9102 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 26050 event pairs, 0 based on Foata normal form. 0/3847 useless extension candidates. Maximal degree in co-relation 5334. Up to 76 conditions per place. [2023-08-25 18:15:48,970 INFO L119 LiptonReduction]: Number of co-enabled transitions 6178260 [2023-08-25 18:16:05,567 INFO L134 LiptonReduction]: Checked pairs total: 43024784 [2023-08-25 18:16:05,567 INFO L136 LiptonReduction]: Total number of compositions: 966 [2023-08-25 18:16:05,569 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:16:05,569 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;@4a16ad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:16:05,569 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:16:07,337 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:16:07,337 INFO L124 PetriNetUnfolderBase]: 277/2494 cut-off events. [2023-08-25 18:16:07,337 INFO L125 PetriNetUnfolderBase]: For 9102/9102 co-relation queries the response was YES. [2023-08-25 18:16:07,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:16:07,338 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] [2023-08-25 18:16:07,338 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:16:07,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:16:07,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1308338340, now seen corresponding path program 1 times [2023-08-25 18:16:07,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:16:07,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481422434] [2023-08-25 18:16:07,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:16:07,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:16:07,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:16:07,387 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:16:07,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:16:07,452 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:16:07,452 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:16:07,452 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:16:07,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-08-25 18:16:07,453 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:16:07,453 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:16:07,453 WARN L233 ceAbstractionStarter]: 37 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:16:07,453 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 38 thread instances. [2023-08-25 18:16:07,604 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 18:16:07,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2479 places, 2635 transitions, 6866 flow [2023-08-25 18:16:12,931 INFO L124 PetriNetUnfolderBase]: 423/4834 cut-off events. [2023-08-25 18:16:12,931 INFO L125 PetriNetUnfolderBase]: For 9842/9842 co-relation queries the response was YES. [2023-08-25 18:16:13,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5690 conditions, 4834 events. 423/4834 cut-off events. For 9842/9842 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 26776 event pairs, 0 based on Foata normal form. 0/3949 useless extension candidates. Maximal degree in co-relation 5499. Up to 78 conditions per place. [2023-08-25 18:16:13,441 INFO L82 GeneralOperation]: Start removeDead. Operand has 2479 places, 2635 transitions, 6866 flow [2023-08-25 18:16:13,526 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2479 places, 2635 transitions, 6866 flow [2023-08-25 18:16:13,526 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:16:13,526 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2479 places, 2635 transitions, 6866 flow [2023-08-25 18:16:13,526 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2479 places, 2635 transitions, 6866 flow [2023-08-25 18:16:13,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2479 places, 2635 transitions, 6866 flow [2023-08-25 18:16:18,845 INFO L124 PetriNetUnfolderBase]: 423/4834 cut-off events. [2023-08-25 18:16:18,845 INFO L125 PetriNetUnfolderBase]: For 9842/9842 co-relation queries the response was YES. [2023-08-25 18:16:19,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5690 conditions, 4834 events. 423/4834 cut-off events. For 9842/9842 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 26776 event pairs, 0 based on Foata normal form. 0/3949 useless extension candidates. Maximal degree in co-relation 5499. Up to 78 conditions per place. [2023-08-25 18:16:21,222 INFO L119 LiptonReduction]: Number of co-enabled transitions 6513276 [2023-08-25 18:16:38,835 INFO L134 LiptonReduction]: Checked pairs total: 40107976 [2023-08-25 18:16:38,836 INFO L136 LiptonReduction]: Total number of compositions: 990 [2023-08-25 18:16:38,837 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:16:38,837 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;@4a16ad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:16:38,837 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:16:40,517 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:16:40,517 INFO L124 PetriNetUnfolderBase]: 285/2564 cut-off events. [2023-08-25 18:16:40,517 INFO L125 PetriNetUnfolderBase]: For 9842/9842 co-relation queries the response was YES. [2023-08-25 18:16:40,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:16:40,517 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] [2023-08-25 18:16:40,517 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:16:40,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:16:40,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1748643686, now seen corresponding path program 1 times [2023-08-25 18:16:40,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:16:40,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724165657] [2023-08-25 18:16:40,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:16:40,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:16:40,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:16:40,569 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:16:40,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:16:40,639 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:16:40,639 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:16:40,639 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:16:40,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-08-25 18:16:40,639 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:16:40,640 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:16:40,640 WARN L233 ceAbstractionStarter]: 38 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:16:40,640 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 39 thread instances. [2023-08-25 18:16:40,937 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 18:16:40,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2542 places, 2702 transitions, 7081 flow [2023-08-25 18:16:46,644 INFO L124 PetriNetUnfolderBase]: 434/4959 cut-off events. [2023-08-25 18:16:46,645 INFO L125 PetriNetUnfolderBase]: For 10621/10621 co-relation queries the response was YES. [2023-08-25 18:16:47,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5857 conditions, 4959 events. 434/4959 cut-off events. For 10621/10621 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 27480 event pairs, 0 based on Foata normal form. 0/4051 useless extension candidates. Maximal degree in co-relation 5665. Up to 80 conditions per place. [2023-08-25 18:16:47,174 INFO L82 GeneralOperation]: Start removeDead. Operand has 2542 places, 2702 transitions, 7081 flow [2023-08-25 18:16:47,263 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2542 places, 2702 transitions, 7081 flow [2023-08-25 18:16:47,263 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:16:47,263 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2542 places, 2702 transitions, 7081 flow [2023-08-25 18:16:47,263 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2542 places, 2702 transitions, 7081 flow [2023-08-25 18:16:47,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2542 places, 2702 transitions, 7081 flow [2023-08-25 18:16:52,889 INFO L124 PetriNetUnfolderBase]: 434/4959 cut-off events. [2023-08-25 18:16:52,889 INFO L125 PetriNetUnfolderBase]: For 10621/10621 co-relation queries the response was YES. [2023-08-25 18:16:53,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5857 conditions, 4959 events. 434/4959 cut-off events. For 10621/10621 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 27480 event pairs, 0 based on Foata normal form. 0/4051 useless extension candidates. Maximal degree in co-relation 5665. Up to 80 conditions per place. [2023-08-25 18:16:55,953 INFO L119 LiptonReduction]: Number of co-enabled transitions 6857136 [2023-08-25 18:17:14,535 INFO L134 LiptonReduction]: Checked pairs total: 42215615 [2023-08-25 18:17:14,535 INFO L136 LiptonReduction]: Total number of compositions: 1013 [2023-08-25 18:17:14,537 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:17:14,537 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;@4a16ad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:17:14,537 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:17:16,475 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:17:16,476 INFO L124 PetriNetUnfolderBase]: 293/2634 cut-off events. [2023-08-25 18:17:16,476 INFO L125 PetriNetUnfolderBase]: For 10621/10621 co-relation queries the response was YES. [2023-08-25 18:17:16,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:17:16,476 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] [2023-08-25 18:17:16,476 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:17:16,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:17:16,476 INFO L85 PathProgramCache]: Analyzing trace with hash -668792844, now seen corresponding path program 1 times [2023-08-25 18:17:16,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:17:16,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96867238] [2023-08-25 18:17:16,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:17:16,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:17:16,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:17:16,530 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:17:16,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:17:16,600 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:17:16,600 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:17:16,600 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:17:16,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-08-25 18:17:16,600 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:17:16,601 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:17:16,601 WARN L233 ceAbstractionStarter]: 39 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:17:16,601 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 40 thread instances. [2023-08-25 18:17:16,755 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 18:17:16,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2605 places, 2769 transitions, 7298 flow [2023-08-25 18:17:22,861 INFO L124 PetriNetUnfolderBase]: 445/5084 cut-off events. [2023-08-25 18:17:22,862 INFO L125 PetriNetUnfolderBase]: For 11440/11440 co-relation queries the response was YES. [2023-08-25 18:17:23,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6025 conditions, 5084 events. 445/5084 cut-off events. For 11440/11440 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 28152 event pairs, 0 based on Foata normal form. 0/4153 useless extension candidates. Maximal degree in co-relation 5832. Up to 82 conditions per place. [2023-08-25 18:17:23,410 INFO L82 GeneralOperation]: Start removeDead. Operand has 2605 places, 2769 transitions, 7298 flow [2023-08-25 18:17:23,499 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2605 places, 2769 transitions, 7298 flow [2023-08-25 18:17:23,499 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:17:23,499 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2605 places, 2769 transitions, 7298 flow [2023-08-25 18:17:23,499 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2605 places, 2769 transitions, 7298 flow [2023-08-25 18:17:23,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2605 places, 2769 transitions, 7298 flow [2023-08-25 18:17:29,389 INFO L124 PetriNetUnfolderBase]: 445/5084 cut-off events. [2023-08-25 18:17:29,389 INFO L125 PetriNetUnfolderBase]: For 11440/11440 co-relation queries the response was YES. [2023-08-25 18:17:29,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6025 conditions, 5084 events. 445/5084 cut-off events. For 11440/11440 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 28152 event pairs, 0 based on Foata normal form. 0/4153 useless extension candidates. Maximal degree in co-relation 5832. Up to 82 conditions per place. [2023-08-25 18:17:32,244 INFO L119 LiptonReduction]: Number of co-enabled transitions 7209840 [2023-08-25 18:17:50,465 INFO L134 LiptonReduction]: Checked pairs total: 50295202 [2023-08-25 18:17:50,465 INFO L136 LiptonReduction]: Total number of compositions: 1030 [2023-08-25 18:17:50,467 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:17:50,467 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;@4a16ad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:17:50,467 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:17:52,453 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:17:52,453 INFO L124 PetriNetUnfolderBase]: 301/2704 cut-off events. [2023-08-25 18:17:52,453 INFO L125 PetriNetUnfolderBase]: For 11440/11440 co-relation queries the response was YES. [2023-08-25 18:17:52,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:17:52,453 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] [2023-08-25 18:17:52,453 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:17:52,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:17:52,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1679647664, now seen corresponding path program 1 times [2023-08-25 18:17:52,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:17:52,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240945101] [2023-08-25 18:17:52,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:17:52,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:17:52,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:17:52,510 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:17:52,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:17:52,581 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:17:52,581 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:17:52,581 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:17:52,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-08-25 18:17:52,582 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:17:52,582 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:17:52,582 WARN L233 ceAbstractionStarter]: 40 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:17:52,582 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 41 thread instances. [2023-08-25 18:17:52,722 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 18:17:52,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2668 places, 2836 transitions, 7517 flow [2023-08-25 18:17:58,948 INFO L124 PetriNetUnfolderBase]: 456/5209 cut-off events. [2023-08-25 18:17:58,948 INFO L125 PetriNetUnfolderBase]: For 12300/12300 co-relation queries the response was YES. [2023-08-25 18:17:59,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6194 conditions, 5209 events. 456/5209 cut-off events. For 12300/12300 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 28901 event pairs, 0 based on Foata normal form. 0/4255 useless extension candidates. Maximal degree in co-relation 6000. Up to 84 conditions per place. [2023-08-25 18:17:59,581 INFO L82 GeneralOperation]: Start removeDead. Operand has 2668 places, 2836 transitions, 7517 flow [2023-08-25 18:17:59,683 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2668 places, 2836 transitions, 7517 flow [2023-08-25 18:17:59,683 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:17:59,683 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2668 places, 2836 transitions, 7517 flow [2023-08-25 18:17:59,683 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2668 places, 2836 transitions, 7517 flow [2023-08-25 18:17:59,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2668 places, 2836 transitions, 7517 flow [2023-08-25 18:18:05,920 INFO L124 PetriNetUnfolderBase]: 456/5209 cut-off events. [2023-08-25 18:18:05,921 INFO L125 PetriNetUnfolderBase]: For 12300/12300 co-relation queries the response was YES. [2023-08-25 18:18:06,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6194 conditions, 5209 events. 456/5209 cut-off events. For 12300/12300 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 28901 event pairs, 0 based on Foata normal form. 0/4255 useless extension candidates. Maximal degree in co-relation 6000. Up to 84 conditions per place. [2023-08-25 18:18:08,881 INFO L119 LiptonReduction]: Number of co-enabled transitions 7571388 [2023-08-25 18:18:27,149 INFO L134 LiptonReduction]: Checked pairs total: 52863217 [2023-08-25 18:18:27,149 INFO L136 LiptonReduction]: Total number of compositions: 1057 [2023-08-25 18:18:27,150 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:18:27,151 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;@4a16ad6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:18:27,151 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:18:29,151 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:18:29,151 INFO L124 PetriNetUnfolderBase]: 309/2774 cut-off events. [2023-08-25 18:18:29,151 INFO L125 PetriNetUnfolderBase]: For 12300/12300 co-relation queries the response was YES. [2023-08-25 18:18:29,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:18:29,151 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] [2023-08-25 18:18:29,151 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:18:29,151 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:18:29,151 INFO L85 PathProgramCache]: Analyzing trace with hash -622458174, now seen corresponding path program 1 times [2023-08-25 18:18:29,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:18:29,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408176210] [2023-08-25 18:18:29,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:18:29,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:18:29,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:18:29,210 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:18:29,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:18:29,541 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:18:29,542 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:18:29,542 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:18:29,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2023-08-25 18:18:29,542 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:18:29,542 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:18:29,542 WARN L233 ceAbstractionStarter]: 41 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:18:29,542 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 42 thread instances. [2023-08-25 18:18:29,728 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-25 18:18:29,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2731 places, 2903 transitions, 7738 flow [2023-08-25 18:18:36,532 INFO L124 PetriNetUnfolderBase]: 467/5334 cut-off events. [2023-08-25 18:18:36,532 INFO L125 PetriNetUnfolderBase]: For 13202/13202 co-relation queries the response was YES. [2023-08-25 18:18:37,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6364 conditions, 5334 events. 467/5334 cut-off events. For 13202/13202 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 29606 event pairs, 0 based on Foata normal form. 0/4357 useless extension candidates. Maximal degree in co-relation 6169. Up to 86 conditions per place. [2023-08-25 18:18:37,178 INFO L82 GeneralOperation]: Start removeDead. Operand has 2731 places, 2903 transitions, 7738 flow [2023-08-25 18:18:37,282 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2731 places, 2903 transitions, 7738 flow [2023-08-25 18:18:37,282 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:18:37,282 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2731 places, 2903 transitions, 7738 flow [2023-08-25 18:18:37,282 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2731 places, 2903 transitions, 7738 flow [2023-08-25 18:18:37,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2731 places, 2903 transitions, 7738 flow