/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.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_72-funloop_hard_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 15:59:08,269 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 15:59:08,335 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 [2023-08-26 15:59:08,340 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 15:59:08,340 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 15:59:08,365 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 15:59:08,365 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 15:59:08,366 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 15:59:08,366 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 15:59:08,371 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 15:59:08,371 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 15:59:08,371 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 15:59:08,371 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 15:59:08,372 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 15:59:08,372 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 15:59:08,373 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 15:59:08,373 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 15:59:08,373 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 15:59:08,373 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 15:59:08,373 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 15:59:08,373 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 15:59:08,374 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 15:59:08,374 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 15:59:08,375 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 15:59:08,375 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 15:59:08,375 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 15:59:08,375 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 15:59:08,375 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:59:08,375 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 15:59:08,376 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 15:59:08,376 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 15:59:08,376 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 15:59:08,377 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 15:59:08,377 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 15:59:08,377 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 15:59:08,377 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 15:59:08,701 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 15:59:08,718 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 15:59:08,720 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 15:59:08,721 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 15:59:08,723 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 15:59:08,724 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_72-funloop_hard_racing.i [2023-08-26 15:59:09,760 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 15:59:09,984 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 15:59:09,985 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_72-funloop_hard_racing.i [2023-08-26 15:59:10,007 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3daae00c6/3f97cf0b51f74d38ba4984579bba179c/FLAGe06e86fb8 [2023-08-26 15:59:10,018 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3daae00c6/3f97cf0b51f74d38ba4984579bba179c [2023-08-26 15:59:10,020 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 15:59:10,021 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 15:59:10,021 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 15:59:10,022 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 15:59:10,023 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 15:59:10,024 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:59:10" (1/1) ... [2023-08-26 15:59:10,024 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@412c33db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:59:10, skipping insertion in model container [2023-08-26 15:59:10,025 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:59:10" (1/1) ... [2023-08-26 15:59:10,061 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 15:59:10,358 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:59:10,378 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 15:59:10,398 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 15:59:10,399 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 15:59:10,404 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [736] [2023-08-26 15:59:10,428 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:59:10,478 INFO L206 MainTranslator]: Completed translation [2023-08-26 15:59:10,479 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:59:10 WrapperNode [2023-08-26 15:59:10,479 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 15:59:10,480 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 15:59:10,480 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 15:59:10,480 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 15:59:10,484 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:59:10" (1/1) ... [2023-08-26 15:59:10,508 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:59:10" (1/1) ... [2023-08-26 15:59:10,541 INFO L138 Inliner]: procedures = 271, calls = 42, calls flagged for inlining = 7, calls inlined = 10, statements flattened = 262 [2023-08-26 15:59:10,542 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 15:59:10,542 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 15:59:10,542 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 15:59:10,542 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 15:59:10,551 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:59:10" (1/1) ... [2023-08-26 15:59:10,551 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:59:10" (1/1) ... [2023-08-26 15:59:10,554 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:59:10" (1/1) ... [2023-08-26 15:59:10,555 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:59:10" (1/1) ... [2023-08-26 15:59:10,561 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:59:10" (1/1) ... [2023-08-26 15:59:10,586 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:59:10" (1/1) ... [2023-08-26 15:59:10,587 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:59:10" (1/1) ... [2023-08-26 15:59:10,588 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:59:10" (1/1) ... [2023-08-26 15:59:10,590 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 15:59:10,591 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 15:59:10,591 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 15:59:10,591 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 15:59:10,592 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:59:10" (1/1) ... [2023-08-26 15:59:10,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:59:10,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:59:10,614 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) [2023-08-26 15:59:10,623 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 [2023-08-26 15:59:10,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 15:59:10,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 15:59:10,638 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 15:59:10,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 15:59:10,638 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 15:59:10,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 15:59:10,638 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-26 15:59:10,638 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-26 15:59:10,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 15:59:10,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 15:59:10,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 15:59:10,639 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-26 15:59:10,745 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 15:59:10,747 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 15:59:10,983 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 15:59:10,991 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 15:59:10,992 INFO L302 CfgBuilder]: Removed 35 assume(true) statements. [2023-08-26 15:59:10,995 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:59:10 BoogieIcfgContainer [2023-08-26 15:59:10,995 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 15:59:10,997 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 15:59:10,997 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 15:59:10,999 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 15:59:10,999 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 03:59:10" (1/3) ... [2023-08-26 15:59:11,000 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c2dac56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:59:10, skipping insertion in model container [2023-08-26 15:59:11,000 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:59:10" (2/3) ... [2023-08-26 15:59:11,000 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c2dac56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:59:11, skipping insertion in model container [2023-08-26 15:59:11,000 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:59:10" (3/3) ... [2023-08-26 15:59:11,002 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_72-funloop_hard_racing.i [2023-08-26 15:59:11,015 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 15:59:11,015 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 37 error locations. [2023-08-26 15:59:11,015 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 15:59:11,099 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-26 15:59:11,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 250 places, 295 transitions, 598 flow [2023-08-26 15:59:11,235 INFO L124 PetriNetUnfolderBase]: 78/464 cut-off events. [2023-08-26 15:59:11,235 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 15:59:11,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 470 conditions, 464 events. 78/464 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2382 event pairs, 0 based on Foata normal form. 0/320 useless extension candidates. Maximal degree in co-relation 257. Up to 8 conditions per place. [2023-08-26 15:59:11,247 INFO L82 GeneralOperation]: Start removeDead. Operand has 250 places, 295 transitions, 598 flow [2023-08-26 15:59:11,257 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 246 places, 290 transitions, 585 flow [2023-08-26 15:59:11,261 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:59:11,270 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 246 places, 290 transitions, 585 flow [2023-08-26 15:59:11,276 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 246 places, 290 transitions, 585 flow [2023-08-26 15:59:11,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 246 places, 290 transitions, 585 flow [2023-08-26 15:59:11,336 INFO L124 PetriNetUnfolderBase]: 77/459 cut-off events. [2023-08-26 15:59:11,337 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:59:11,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 464 conditions, 459 events. 77/459 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2324 event pairs, 0 based on Foata normal form. 0/315 useless extension candidates. Maximal degree in co-relation 257. Up to 8 conditions per place. [2023-08-26 15:59:11,351 INFO L119 LiptonReduction]: Number of co-enabled transitions 29050 [2023-08-26 15:59:14,848 INFO L134 LiptonReduction]: Checked pairs total: 60534 [2023-08-26 15:59:14,848 INFO L136 LiptonReduction]: Total number of compositions: 279 [2023-08-26 15:59:14,858 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:59:14,863 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1365fadc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:59:14,863 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:59:14,868 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:59:14,868 INFO L124 PetriNetUnfolderBase]: 15/66 cut-off events. [2023-08-26 15:59:14,868 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:59:14,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:59:14,869 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-26 15:59:14,869 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:59:14,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:59:14,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1761983871, now seen corresponding path program 1 times [2023-08-26 15:59:14,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:59:14,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128568945] [2023-08-26 15:59:14,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:59:14,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:59:14,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:59:15,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 15:59:15,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:59:15,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128568945] [2023-08-26 15:59:15,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128568945] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:59:15,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:59:15,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:59:15,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243983655] [2023-08-26 15:59:15,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:59:15,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:59:15,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:59:15,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:59:15,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:59:15,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 574 [2023-08-26 15:59:15,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 132 transitions, 269 flow. Second operand has 3 states, 3 states have (on average 242.66666666666666) internal successors, (728), 3 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:59:15,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:59:15,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 574 [2023-08-26 15:59:15,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:59:15,370 INFO L124 PetriNetUnfolderBase]: 1057/2314 cut-off events. [2023-08-26 15:59:15,370 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:59:15,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4303 conditions, 2314 events. 1057/2314 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 16766 event pairs, 900 based on Foata normal form. 180/1663 useless extension candidates. Maximal degree in co-relation 4184. Up to 1982 conditions per place. [2023-08-26 15:59:15,374 INFO L140 encePairwiseOnDemand]: 528/574 looper letters, 29 selfloop transitions, 2 changer transitions 51/90 dead transitions. [2023-08-26 15:59:15,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 90 transitions, 329 flow [2023-08-26 15:59:15,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:59:15,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:59:15,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 839 transitions. [2023-08-26 15:59:15,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48722415795586527 [2023-08-26 15:59:15,388 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 839 transitions. [2023-08-26 15:59:15,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 839 transitions. [2023-08-26 15:59:15,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:59:15,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 839 transitions. [2023-08-26 15:59:15,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 279.6666666666667) internal successors, (839), 3 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:59:15,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:59:15,402 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 574.0) internal successors, (2296), 4 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:59:15,403 INFO L175 Difference]: Start difference. First operand has 97 places, 132 transitions, 269 flow. Second operand 3 states and 839 transitions. [2023-08-26 15:59:15,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 90 transitions, 329 flow [2023-08-26 15:59:15,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 90 transitions, 329 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 15:59:15,407 INFO L231 Difference]: Finished difference. Result has 89 places, 39 transitions, 93 flow [2023-08-26 15:59:15,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=93, PETRI_PLACES=89, PETRI_TRANSITIONS=39} [2023-08-26 15:59:15,411 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -8 predicate places. [2023-08-26 15:59:15,411 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 39 transitions, 93 flow [2023-08-26 15:59:15,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 242.66666666666666) internal successors, (728), 3 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:59:15,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:59:15,412 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-26 15:59:15,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 15:59:15,412 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:59:15,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:59:15,418 INFO L85 PathProgramCache]: Analyzing trace with hash -516302778, now seen corresponding path program 1 times [2023-08-26 15:59:15,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:59:15,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361877418] [2023-08-26 15:59:15,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:59:15,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:59:15,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:59:15,527 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 15:59:15,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:59:15,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361877418] [2023-08-26 15:59:15,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361877418] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 15:59:15,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374875507] [2023-08-26 15:59:15,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:59:15,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:59:15,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:59:15,530 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 15:59:15,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-26 15:59:15,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:59:15,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-26 15:59:15,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 15:59:15,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 15:59:15,648 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 15:59:15,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 15:59:15,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374875507] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 15:59:15,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 15:59:15,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-26 15:59:15,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108460551] [2023-08-26 15:59:15,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 15:59:15,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 15:59:15,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:59:15,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 15:59:15,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-26 15:59:15,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 574 [2023-08-26 15:59:15,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 39 transitions, 93 flow. Second operand has 7 states, 7 states have (on average 242.57142857142858) internal successors, (1698), 7 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:59:15,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:59:15,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 574 [2023-08-26 15:59:15,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:59:15,743 INFO L124 PetriNetUnfolderBase]: 113/287 cut-off events. [2023-08-26 15:59:15,743 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:59:15,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 547 conditions, 287 events. 113/287 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1207 event pairs, 100 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 535. Up to 240 conditions per place. [2023-08-26 15:59:15,744 INFO L140 encePairwiseOnDemand]: 571/574 looper letters, 29 selfloop transitions, 5 changer transitions 0/42 dead transitions. [2023-08-26 15:59:15,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 42 transitions, 173 flow [2023-08-26 15:59:15,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 15:59:15,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 15:59:15,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1483 transitions. [2023-08-26 15:59:15,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43060394889663184 [2023-08-26 15:59:15,747 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1483 transitions. [2023-08-26 15:59:15,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1483 transitions. [2023-08-26 15:59:15,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:59:15,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1483 transitions. [2023-08-26 15:59:15,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 247.16666666666666) internal successors, (1483), 6 states have internal predecessors, (1483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:59:15,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 574.0) internal successors, (4018), 7 states have internal predecessors, (4018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:59:15,755 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 574.0) internal successors, (4018), 7 states have internal predecessors, (4018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:59:15,755 INFO L175 Difference]: Start difference. First operand has 89 places, 39 transitions, 93 flow. Second operand 6 states and 1483 transitions. [2023-08-26 15:59:15,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 42 transitions, 173 flow [2023-08-26 15:59:15,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 42 transitions, 169 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-26 15:59:15,757 INFO L231 Difference]: Finished difference. Result has 48 places, 42 transitions, 125 flow [2023-08-26 15:59:15,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=125, PETRI_PLACES=48, PETRI_TRANSITIONS=42} [2023-08-26 15:59:15,758 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -49 predicate places. [2023-08-26 15:59:15,758 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 42 transitions, 125 flow [2023-08-26 15:59:15,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 242.57142857142858) internal successors, (1698), 7 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:59:15,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:59:15,759 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-08-26 15:59:15,779 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-26 15:59:15,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:59:15,964 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:59:15,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:59:15,964 INFO L85 PathProgramCache]: Analyzing trace with hash -183235647, now seen corresponding path program 2 times [2023-08-26 15:59:15,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:59:15,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852924400] [2023-08-26 15:59:15,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:59:15,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:59:15,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:59:16,030 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 15:59:16,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:59:16,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852924400] [2023-08-26 15:59:16,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852924400] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 15:59:16,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938514035] [2023-08-26 15:59:16,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 15:59:16,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:59:16,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:59:16,036 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 15:59:16,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-26 15:59:16,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 15:59:16,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 15:59:16,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 15:59:16,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 15:59:16,118 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 15:59:16,118 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 15:59:16,161 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 15:59:16,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938514035] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 15:59:16,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 15:59:16,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-26 15:59:16,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983139191] [2023-08-26 15:59:16,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 15:59:16,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 15:59:16,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:59:16,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 15:59:16,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-26 15:59:16,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 574 [2023-08-26 15:59:16,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 42 transitions, 125 flow. Second operand has 13 states, 13 states have (on average 242.30769230769232) internal successors, (3150), 13 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:59:16,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:59:16,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 574 [2023-08-26 15:59:16,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:59:16,250 INFO L124 PetriNetUnfolderBase]: 113/293 cut-off events. [2023-08-26 15:59:16,250 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-08-26 15:59:16,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 293 events. 113/293 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1207 event pairs, 100 based on Foata normal form. 6/173 useless extension candidates. Maximal degree in co-relation 526. Up to 240 conditions per place. [2023-08-26 15:59:16,251 INFO L140 encePairwiseOnDemand]: 571/574 looper letters, 29 selfloop transitions, 11 changer transitions 0/48 dead transitions. [2023-08-26 15:59:16,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 48 transitions, 241 flow [2023-08-26 15:59:16,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-26 15:59:16,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-26 15:59:16,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2938 transitions. [2023-08-26 15:59:16,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4265389082462253 [2023-08-26 15:59:16,257 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2938 transitions. [2023-08-26 15:59:16,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2938 transitions. [2023-08-26 15:59:16,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:59:16,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2938 transitions. [2023-08-26 15:59:16,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 244.83333333333334) internal successors, (2938), 12 states have internal predecessors, (2938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:59:16,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 574.0) internal successors, (7462), 13 states have internal predecessors, (7462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:59:16,272 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 574.0) internal successors, (7462), 13 states have internal predecessors, (7462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:59:16,272 INFO L175 Difference]: Start difference. First operand has 48 places, 42 transitions, 125 flow. Second operand 12 states and 2938 transitions. [2023-08-26 15:59:16,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 48 transitions, 241 flow [2023-08-26 15:59:16,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 48 transitions, 227 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-26 15:59:16,274 INFO L231 Difference]: Finished difference. Result has 64 places, 48 transitions, 195 flow [2023-08-26 15:59:16,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=574, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=195, PETRI_PLACES=64, PETRI_TRANSITIONS=48} [2023-08-26 15:59:16,274 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -33 predicate places. [2023-08-26 15:59:16,274 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 48 transitions, 195 flow [2023-08-26 15:59:16,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 242.30769230769232) internal successors, (3150), 13 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:59:16,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:59:16,276 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-08-26 15:59:16,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-26 15:59:16,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-26 15:59:16,480 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:59:16,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:59:16,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1020834399, now seen corresponding path program 3 times [2023-08-26 15:59:16,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:59:16,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170644721] [2023-08-26 15:59:16,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:59:16,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:59:16,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:59:16,500 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:59:16,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:59:16,524 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:59:16,524 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:59:16,524 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:59:16,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 15:59:16,526 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-26 15:59:16,527 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:59:16,528 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:59:16,528 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-26 15:59:16,553 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 15:59:16,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 321 places, 380 transitions, 778 flow [2023-08-26 15:59:16,630 INFO L124 PetriNetUnfolderBase]: 126/745 cut-off events. [2023-08-26 15:59:16,631 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 15:59:16,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 759 conditions, 745 events. 126/745 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 4285 event pairs, 0 based on Foata normal form. 0/513 useless extension candidates. Maximal degree in co-relation 466. Up to 12 conditions per place. [2023-08-26 15:59:16,639 INFO L82 GeneralOperation]: Start removeDead. Operand has 321 places, 380 transitions, 778 flow [2023-08-26 15:59:16,643 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 321 places, 380 transitions, 778 flow [2023-08-26 15:59:16,644 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:59:16,644 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 321 places, 380 transitions, 778 flow [2023-08-26 15:59:16,644 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 321 places, 380 transitions, 778 flow [2023-08-26 15:59:16,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 321 places, 380 transitions, 778 flow [2023-08-26 15:59:16,695 INFO L124 PetriNetUnfolderBase]: 126/745 cut-off events. [2023-08-26 15:59:16,695 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 15:59:16,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 759 conditions, 745 events. 126/745 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 4285 event pairs, 0 based on Foata normal form. 0/513 useless extension candidates. Maximal degree in co-relation 466. Up to 12 conditions per place. [2023-08-26 15:59:16,724 INFO L119 LiptonReduction]: Number of co-enabled transitions 73704 [2023-08-26 15:59:20,792 INFO L134 LiptonReduction]: Checked pairs total: 148875 [2023-08-26 15:59:20,792 INFO L136 LiptonReduction]: Total number of compositions: 354 [2023-08-26 15:59:20,794 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:59:20,794 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;@1365fadc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:59:20,794 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:59:20,822 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:59:20,823 INFO L124 PetriNetUnfolderBase]: 59/221 cut-off events. [2023-08-26 15:59:20,823 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 15:59:20,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:59:20,823 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-26 15:59:20,823 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:59:20,826 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:59:20,826 INFO L85 PathProgramCache]: Analyzing trace with hash -214864352, now seen corresponding path program 1 times [2023-08-26 15:59:20,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:59:20,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452953375] [2023-08-26 15:59:20,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:59:20,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:59:20,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:59:20,870 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-26 15:59:20,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:59:20,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452953375] [2023-08-26 15:59:20,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452953375] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:59:20,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:59:20,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:59:20,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966130632] [2023-08-26 15:59:20,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:59:20,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:59:20,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:59:20,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:59:20,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:59:20,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 734 [2023-08-26 15:59:20,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 178 transitions, 374 flow. Second operand has 3 states, 3 states have (on average 312.0) internal successors, (936), 3 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:59:20,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:59:20,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 734 [2023-08-26 15:59:20,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:59:25,265 INFO L124 PetriNetUnfolderBase]: 49265/78685 cut-off events. [2023-08-26 15:59:25,265 INFO L125 PetriNetUnfolderBase]: For 180/180 co-relation queries the response was YES. [2023-08-26 15:59:25,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149487 conditions, 78685 events. 49265/78685 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 3015. Compared 685345 event pairs, 44028 based on Foata normal form. 6272/58825 useless extension candidates. Maximal degree in co-relation 60467. Up to 70663 conditions per place. [2023-08-26 15:59:25,399 INFO L140 encePairwiseOnDemand]: 677/734 looper letters, 53 selfloop transitions, 2 changer transitions 56/125 dead transitions. [2023-08-26 15:59:25,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 125 transitions, 468 flow [2023-08-26 15:59:25,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:59:25,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:59:25,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1085 transitions. [2023-08-26 15:59:25,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4927338782924614 [2023-08-26 15:59:25,402 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1085 transitions. [2023-08-26 15:59:25,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1085 transitions. [2023-08-26 15:59:25,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:59:25,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1085 transitions. [2023-08-26 15:59:25,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 361.6666666666667) internal successors, (1085), 3 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:59:25,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 734.0) internal successors, (2936), 4 states have internal predecessors, (2936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:59:25,407 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 734.0) internal successors, (2936), 4 states have internal predecessors, (2936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:59:25,407 INFO L175 Difference]: Start difference. First operand has 131 places, 178 transitions, 374 flow. Second operand 3 states and 1085 transitions. [2023-08-26 15:59:25,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 125 transitions, 468 flow [2023-08-26 15:59:25,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 125 transitions, 468 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 15:59:25,410 INFO L231 Difference]: Finished difference. Result has 122 places, 69 transitions, 160 flow [2023-08-26 15:59:25,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=734, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=122, PETRI_TRANSITIONS=69} [2023-08-26 15:59:25,411 INFO L281 CegarLoopForPetriNet]: 131 programPoint places, -9 predicate places. [2023-08-26 15:59:25,411 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 69 transitions, 160 flow [2023-08-26 15:59:25,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 312.0) internal successors, (936), 3 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:59:25,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:59:25,411 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-26 15:59:25,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 15:59:25,412 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:59:25,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:59:25,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1614133804, now seen corresponding path program 1 times [2023-08-26 15:59:25,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:59:25,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852802274] [2023-08-26 15:59:25,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:59:25,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:59:25,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:59:25,446 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-26 15:59:25,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:59:25,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852802274] [2023-08-26 15:59:25,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852802274] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 15:59:25,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989408149] [2023-08-26 15:59:25,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:59:25,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:59:25,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:59:25,466 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 15:59:25,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-26 15:59:25,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:59:25,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-26 15:59:25,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 15:59:25,565 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-26 15:59:25,565 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 15:59:25,574 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-26 15:59:25,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989408149] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 15:59:25,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 15:59:25,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-26 15:59:25,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609029937] [2023-08-26 15:59:25,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 15:59:25,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 15:59:25,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:59:25,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 15:59:25,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-26 15:59:25,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 734 [2023-08-26 15:59:25,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 69 transitions, 160 flow. Second operand has 7 states, 7 states have (on average 311.7142857142857) internal successors, (2182), 7 states have internal predecessors, (2182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:59:25,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:59:25,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 734 [2023-08-26 15:59:25,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:59:26,263 INFO L124 PetriNetUnfolderBase]: 5705/9484 cut-off events. [2023-08-26 15:59:26,263 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2023-08-26 15:59:26,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18086 conditions, 9484 events. 5705/9484 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 64824 event pairs, 5182 based on Foata normal form. 0/5810 useless extension candidates. Maximal degree in co-relation 18073. Up to 8496 conditions per place. [2023-08-26 15:59:26,299 INFO L140 encePairwiseOnDemand]: 731/734 looper letters, 53 selfloop transitions, 5 changer transitions 0/72 dead transitions. [2023-08-26 15:59:26,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 72 transitions, 288 flow [2023-08-26 15:59:26,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 15:59:26,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 15:59:26,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1921 transitions. [2023-08-26 15:59:26,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43619436875567663 [2023-08-26 15:59:26,304 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1921 transitions. [2023-08-26 15:59:26,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1921 transitions. [2023-08-26 15:59:26,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:59:26,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1921 transitions. [2023-08-26 15:59:26,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 320.1666666666667) internal successors, (1921), 6 states have internal predecessors, (1921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:59:26,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 734.0) internal successors, (5138), 7 states have internal predecessors, (5138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:59:26,312 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 734.0) internal successors, (5138), 7 states have internal predecessors, (5138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:59:26,312 INFO L175 Difference]: Start difference. First operand has 122 places, 69 transitions, 160 flow. Second operand 6 states and 1921 transitions. [2023-08-26 15:59:26,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 72 transitions, 288 flow [2023-08-26 15:59:26,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 72 transitions, 282 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-26 15:59:26,329 INFO L231 Difference]: Finished difference. Result has 78 places, 72 transitions, 190 flow [2023-08-26 15:59:26,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=734, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=190, PETRI_PLACES=78, PETRI_TRANSITIONS=72} [2023-08-26 15:59:26,331 INFO L281 CegarLoopForPetriNet]: 131 programPoint places, -53 predicate places. [2023-08-26 15:59:26,331 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 72 transitions, 190 flow [2023-08-26 15:59:26,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 311.7142857142857) internal successors, (2182), 7 states have internal predecessors, (2182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:59:26,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:59:26,332 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-26 15:59:26,338 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-26 15:59:26,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:59:26,533 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:59:26,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:59:26,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1098663136, now seen corresponding path program 2 times [2023-08-26 15:59:26,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:59:26,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521112276] [2023-08-26 15:59:26,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:59:26,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:59:26,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:59:26,636 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-26 15:59:26,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:59:26,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521112276] [2023-08-26 15:59:26,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521112276] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 15:59:26,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885578797] [2023-08-26 15:59:26,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 15:59:26,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:59:26,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:59:26,640 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 15:59:26,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-26 15:59:26,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 15:59:26,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 15:59:26,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 15:59:26,713 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 15:59:26,730 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-26 15:59:26,730 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 15:59:26,770 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-26 15:59:26,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885578797] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 15:59:26,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 15:59:26,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-26 15:59:26,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722570741] [2023-08-26 15:59:26,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 15:59:26,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 15:59:26,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:59:26,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 15:59:26,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-26 15:59:26,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 734 [2023-08-26 15:59:26,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 72 transitions, 190 flow. Second operand has 13 states, 13 states have (on average 311.38461538461536) internal successors, (4048), 13 states have internal predecessors, (4048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:59:26,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:59:26,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 734 [2023-08-26 15:59:26,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:59:27,304 INFO L124 PetriNetUnfolderBase]: 5705/9490 cut-off events. [2023-08-26 15:59:27,304 INFO L125 PetriNetUnfolderBase]: For 87/87 co-relation queries the response was YES. [2023-08-26 15:59:27,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18114 conditions, 9490 events. 5705/9490 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 64783 event pairs, 5182 based on Foata normal form. 6/5823 useless extension candidates. Maximal degree in co-relation 18055. Up to 8496 conditions per place. [2023-08-26 15:59:27,328 INFO L140 encePairwiseOnDemand]: 731/734 looper letters, 53 selfloop transitions, 11 changer transitions 0/78 dead transitions. [2023-08-26 15:59:27,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 78 transitions, 354 flow [2023-08-26 15:59:27,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-26 15:59:27,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-26 15:59:27,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3790 transitions. [2023-08-26 15:59:27,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43029064486830154 [2023-08-26 15:59:27,336 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3790 transitions. [2023-08-26 15:59:27,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3790 transitions. [2023-08-26 15:59:27,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:59:27,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3790 transitions. [2023-08-26 15:59:27,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 315.8333333333333) internal successors, (3790), 12 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:59:27,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 734.0) internal successors, (9542), 13 states have internal predecessors, (9542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:59:27,350 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 734.0) internal successors, (9542), 13 states have internal predecessors, (9542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:59:27,350 INFO L175 Difference]: Start difference. First operand has 78 places, 72 transitions, 190 flow. Second operand 12 states and 3790 transitions. [2023-08-26 15:59:27,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 78 transitions, 354 flow [2023-08-26 15:59:27,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 78 transitions, 340 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-26 15:59:27,352 INFO L231 Difference]: Finished difference. Result has 94 places, 78 transitions, 260 flow [2023-08-26 15:59:27,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=734, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=260, PETRI_PLACES=94, PETRI_TRANSITIONS=78} [2023-08-26 15:59:27,353 INFO L281 CegarLoopForPetriNet]: 131 programPoint places, -37 predicate places. [2023-08-26 15:59:27,353 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 78 transitions, 260 flow [2023-08-26 15:59:27,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 311.38461538461536) internal successors, (4048), 13 states have internal predecessors, (4048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:59:27,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:59:27,354 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-26 15:59:27,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-26 15:59:27,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:59:27,558 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:59:27,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:59:27,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1947992416, now seen corresponding path program 3 times [2023-08-26 15:59:27,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:59:27,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699156493] [2023-08-26 15:59:27,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:59:27,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:59:27,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:59:27,573 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:59:27,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:59:27,585 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:59:27,586 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:59:27,586 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:59:27,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 15:59:27,586 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-26 15:59:27,586 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:59:27,586 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:59:27,586 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-26 15:59:27,618 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-26 15:59:27,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 392 places, 465 transitions, 960 flow [2023-08-26 15:59:27,736 INFO L124 PetriNetUnfolderBase]: 179/1063 cut-off events. [2023-08-26 15:59:27,736 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 15:59:27,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1091 conditions, 1063 events. 179/1063 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 6446 event pairs, 1 based on Foata normal form. 0/735 useless extension candidates. Maximal degree in co-relation 753. Up to 16 conditions per place. [2023-08-26 15:59:27,746 INFO L82 GeneralOperation]: Start removeDead. Operand has 392 places, 465 transitions, 960 flow [2023-08-26 15:59:27,751 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 392 places, 465 transitions, 960 flow [2023-08-26 15:59:27,751 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:59:27,751 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 392 places, 465 transitions, 960 flow [2023-08-26 15:59:27,751 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 392 places, 465 transitions, 960 flow [2023-08-26 15:59:27,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 392 places, 465 transitions, 960 flow [2023-08-26 15:59:27,838 INFO L124 PetriNetUnfolderBase]: 179/1063 cut-off events. [2023-08-26 15:59:27,839 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 15:59:27,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1091 conditions, 1063 events. 179/1063 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 6446 event pairs, 1 based on Foata normal form. 0/735 useless extension candidates. Maximal degree in co-relation 753. Up to 16 conditions per place. [2023-08-26 15:59:27,884 INFO L119 LiptonReduction]: Number of co-enabled transitions 131970 [2023-08-26 15:59:32,453 INFO L134 LiptonReduction]: Checked pairs total: 270738 [2023-08-26 15:59:32,453 INFO L136 LiptonReduction]: Total number of compositions: 415 [2023-08-26 15:59:32,455 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:59:32,455 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;@1365fadc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:59:32,455 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:59:32,471 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:59:32,472 INFO L124 PetriNetUnfolderBase]: 92/347 cut-off events. [2023-08-26 15:59:32,472 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-26 15:59:32,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:59:32,472 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-26 15:59:32,472 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:59:32,472 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:59:32,472 INFO L85 PathProgramCache]: Analyzing trace with hash -156267884, now seen corresponding path program 1 times [2023-08-26 15:59:32,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:59:32,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581670582] [2023-08-26 15:59:32,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:59:32,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:59:32,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:59:32,490 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-26 15:59:32,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:59:32,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581670582] [2023-08-26 15:59:32,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581670582] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:59:32,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:59:32,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:59:32,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839999410] [2023-08-26 15:59:32,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:59:32,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:59:32,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:59:32,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:59:32,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:59:32,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 379 out of 880 [2023-08-26 15:59:32,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 220 transitions, 470 flow. Second operand has 3 states, 3 states have (on average 381.3333333333333) internal successors, (1144), 3 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:59:32,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:59:32,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 379 of 880 [2023-08-26 15:59:32,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand