/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_51-mutexptr_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 15:57:09,877 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 15:57:09,963 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 15:57:09,969 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 15:57:09,970 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 15:57:10,002 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 15:57:10,003 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 15:57:10,003 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 15:57:10,004 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 15:57:10,007 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 15:57:10,007 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 15:57:10,008 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 15:57:10,008 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 15:57:10,009 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 15:57:10,009 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 15:57:10,010 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 15:57:10,010 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 15:57:10,010 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 15:57:10,010 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 15:57:10,010 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 15:57:10,010 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 15:57:10,011 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 15:57:10,011 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 15:57:10,012 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 15:57:10,012 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 15:57:10,012 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 15:57:10,013 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 15:57:10,013 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:57:10,013 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 15:57:10,014 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 15:57:10,015 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 15:57:10,015 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 15:57:10,015 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 15:57:10,015 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 15:57:10,015 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 15:57:10,015 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 15:57:10,335 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 15:57:10,351 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 15:57:10,353 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 15:57:10,354 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 15:57:10,356 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 15:57:10,357 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_51-mutexptr_racefree.i [2023-08-26 15:57:11,582 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 15:57:11,829 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 15:57:11,829 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_51-mutexptr_racefree.i [2023-08-26 15:57:11,845 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3af8afee/78d3be32cfa048babc6eaa61a28c4f75/FLAG6bfcabef8 [2023-08-26 15:57:11,859 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3af8afee/78d3be32cfa048babc6eaa61a28c4f75 [2023-08-26 15:57:11,863 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 15:57:11,865 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 15:57:11,866 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 15:57:11,866 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 15:57:11,868 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 15:57:11,869 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:57:11" (1/1) ... [2023-08-26 15:57:11,869 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63a6c79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:57:11, skipping insertion in model container [2023-08-26 15:57:11,869 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:57:11" (1/1) ... [2023-08-26 15:57:11,914 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 15:57:12,220 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:57:12,234 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 15:57:12,256 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 15:57:12,257 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 15:57:12,276 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:57:12,314 INFO L206 MainTranslator]: Completed translation [2023-08-26 15:57:12,314 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:57:12 WrapperNode [2023-08-26 15:57:12,314 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 15:57:12,315 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 15:57:12,315 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 15:57:12,316 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 15:57:12,321 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:57:12" (1/1) ... [2023-08-26 15:57:12,336 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:57:12" (1/1) ... [2023-08-26 15:57:12,359 INFO L138 Inliner]: procedures = 170, calls = 38, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 93 [2023-08-26 15:57:12,359 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 15:57:12,360 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 15:57:12,360 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 15:57:12,360 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 15:57:12,367 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:57:12" (1/1) ... [2023-08-26 15:57:12,367 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:57:12" (1/1) ... [2023-08-26 15:57:12,371 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:57:12" (1/1) ... [2023-08-26 15:57:12,371 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:57:12" (1/1) ... [2023-08-26 15:57:12,377 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:57:12" (1/1) ... [2023-08-26 15:57:12,380 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:57:12" (1/1) ... [2023-08-26 15:57:12,386 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:57:12" (1/1) ... [2023-08-26 15:57:12,387 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:57:12" (1/1) ... [2023-08-26 15:57:12,396 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 15:57:12,397 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 15:57:12,397 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 15:57:12,397 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 15:57:12,398 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:57:12" (1/1) ... [2023-08-26 15:57:12,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:57:12,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:57:12,426 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 15:57:12,427 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 15:57:12,459 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 15:57:12,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 15:57:12,460 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 15:57:12,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 15:57:12,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 15:57:12,461 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-26 15:57:12,461 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-26 15:57:12,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 15:57:12,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 15:57:12,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 15:57:12,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 15:57:12,463 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 15:57:12,594 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 15:57:12,596 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 15:57:12,904 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 15:57:12,911 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 15:57:12,911 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-26 15:57:12,912 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:57:12 BoogieIcfgContainer [2023-08-26 15:57:12,913 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 15:57:12,914 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 15:57:12,915 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 15:57:12,917 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 15:57:12,917 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 03:57:11" (1/3) ... [2023-08-26 15:57:12,918 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75ee182e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:57:12, skipping insertion in model container [2023-08-26 15:57:12,918 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:57:12" (2/3) ... [2023-08-26 15:57:12,918 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75ee182e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:57:12, skipping insertion in model container [2023-08-26 15:57:12,918 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:57:12" (3/3) ... [2023-08-26 15:57:12,919 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_51-mutexptr_racefree.i [2023-08-26 15:57:12,947 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 15:57:12,947 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-08-26 15:57:12,947 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 15:57:12,993 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-26 15:57:13,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 143 transitions, 294 flow [2023-08-26 15:57:13,086 INFO L124 PetriNetUnfolderBase]: 19/191 cut-off events. [2023-08-26 15:57:13,087 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 15:57:13,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 191 events. 19/191 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 560 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 96. Up to 4 conditions per place. [2023-08-26 15:57:13,094 INFO L82 GeneralOperation]: Start removeDead. Operand has 133 places, 143 transitions, 294 flow [2023-08-26 15:57:13,098 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 138 transitions, 281 flow [2023-08-26 15:57:13,101 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:57:13,108 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 129 places, 138 transitions, 281 flow [2023-08-26 15:57:13,111 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 129 places, 138 transitions, 281 flow [2023-08-26 15:57:13,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 138 transitions, 281 flow [2023-08-26 15:57:13,144 INFO L124 PetriNetUnfolderBase]: 18/186 cut-off events. [2023-08-26 15:57:13,145 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:57:13,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191 conditions, 186 events. 18/186 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 535 event pairs, 0 based on Foata normal form. 0/142 useless extension candidates. Maximal degree in co-relation 96. Up to 4 conditions per place. [2023-08-26 15:57:13,149 INFO L119 LiptonReduction]: Number of co-enabled transitions 4644 [2023-08-26 15:57:17,114 INFO L134 LiptonReduction]: Checked pairs total: 9998 [2023-08-26 15:57:17,115 INFO L136 LiptonReduction]: Total number of compositions: 133 [2023-08-26 15:57:17,126 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:57:17,131 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38446e59, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:57:17,132 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:57:17,137 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:57:17,138 INFO L124 PetriNetUnfolderBase]: 3/28 cut-off events. [2023-08-26 15:57:17,138 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:57:17,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:57:17,138 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-26 15:57:17,139 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:57:17,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:57:17,143 INFO L85 PathProgramCache]: Analyzing trace with hash -941618493, now seen corresponding path program 1 times [2023-08-26 15:57:17,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:57:17,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903898358] [2023-08-26 15:57:17,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:57:17,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:57:17,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:57:17,250 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:57:17,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:57:17,291 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:57:17,292 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:57:17,293 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:57:17,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 15:57:17,295 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:57:17,298 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:57:17,298 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:57:17,298 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-26 15:57:17,327 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 15:57:17,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 188 transitions, 394 flow [2023-08-26 15:57:17,408 INFO L124 PetriNetUnfolderBase]: 34/311 cut-off events. [2023-08-26 15:57:17,409 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 15:57:17,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 311 events. 34/311 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1095 event pairs, 0 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 193. Up to 8 conditions per place. [2023-08-26 15:57:17,415 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 188 transitions, 394 flow [2023-08-26 15:57:17,417 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 173 places, 188 transitions, 394 flow [2023-08-26 15:57:17,417 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:57:17,417 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 173 places, 188 transitions, 394 flow [2023-08-26 15:57:17,418 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 173 places, 188 transitions, 394 flow [2023-08-26 15:57:17,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 188 transitions, 394 flow [2023-08-26 15:57:17,467 INFO L124 PetriNetUnfolderBase]: 34/311 cut-off events. [2023-08-26 15:57:17,467 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 15:57:17,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 311 events. 34/311 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1095 event pairs, 0 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 193. Up to 8 conditions per place. [2023-08-26 15:57:17,479 INFO L119 LiptonReduction]: Number of co-enabled transitions 13932 [2023-08-26 15:57:21,376 INFO L134 LiptonReduction]: Checked pairs total: 32071 [2023-08-26 15:57:21,377 INFO L136 LiptonReduction]: Total number of compositions: 162 [2023-08-26 15:57:21,379 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:57:21,379 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;@38446e59, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:57:21,380 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:57:21,392 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:57:21,393 INFO L124 PetriNetUnfolderBase]: 12/79 cut-off events. [2023-08-26 15:57:21,393 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 15:57:21,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:57:21,394 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-26 15:57:21,396 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:57:21,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:57:21,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1899645297, now seen corresponding path program 1 times [2023-08-26 15:57:21,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:57:21,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686905611] [2023-08-26 15:57:21,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:57:21,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:57:21,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:57:21,449 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:57:21,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:57:21,495 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:57:21,495 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:57:21,496 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:57:21,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 15:57:21,496 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:57:21,497 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:57:21,497 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:57:21,497 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-26 15:57:21,537 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-26 15:57:21,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 233 transitions, 496 flow [2023-08-26 15:57:21,595 INFO L124 PetriNetUnfolderBase]: 54/468 cut-off events. [2023-08-26 15:57:21,595 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 15:57:21,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496 conditions, 468 events. 54/468 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1856 event pairs, 1 based on Foata normal form. 0/350 useless extension candidates. Maximal degree in co-relation 319. Up to 16 conditions per place. [2023-08-26 15:57:21,600 INFO L82 GeneralOperation]: Start removeDead. Operand has 213 places, 233 transitions, 496 flow [2023-08-26 15:57:21,603 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 213 places, 233 transitions, 496 flow [2023-08-26 15:57:21,603 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:57:21,603 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 213 places, 233 transitions, 496 flow [2023-08-26 15:57:21,604 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 213 places, 233 transitions, 496 flow [2023-08-26 15:57:21,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 233 transitions, 496 flow [2023-08-26 15:57:21,656 INFO L124 PetriNetUnfolderBase]: 54/468 cut-off events. [2023-08-26 15:57:21,656 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 15:57:21,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496 conditions, 468 events. 54/468 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1856 event pairs, 1 based on Foata normal form. 0/350 useless extension candidates. Maximal degree in co-relation 319. Up to 16 conditions per place. [2023-08-26 15:57:21,678 INFO L119 LiptonReduction]: Number of co-enabled transitions 26832 [2023-08-26 15:57:25,779 INFO L134 LiptonReduction]: Checked pairs total: 74401 [2023-08-26 15:57:25,779 INFO L136 LiptonReduction]: Total number of compositions: 191 [2023-08-26 15:57:25,781 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:57:25,782 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;@38446e59, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:57:25,782 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:57:25,795 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:57:25,796 INFO L124 PetriNetUnfolderBase]: 22/128 cut-off events. [2023-08-26 15:57:25,796 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-26 15:57:25,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:57:25,796 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-26 15:57:25,796 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:57:25,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:57:25,797 INFO L85 PathProgramCache]: Analyzing trace with hash 347800800, now seen corresponding path program 1 times [2023-08-26 15:57:25,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:57:25,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048312178] [2023-08-26 15:57:25,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:57:25,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:57:25,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:57:25,822 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:57:25,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:57:25,842 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:57:25,842 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:57:25,842 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:57:25,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 15:57:25,843 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:57:25,843 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:57:25,844 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:57:25,844 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-26 15:57:25,869 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-26 15:57:25,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 253 places, 278 transitions, 600 flow [2023-08-26 15:57:25,978 INFO L124 PetriNetUnfolderBase]: 86/701 cut-off events. [2023-08-26 15:57:25,979 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 15:57:25,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 756 conditions, 701 events. 86/701 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3105 event pairs, 6 based on Foata normal form. 0/526 useless extension candidates. Maximal degree in co-relation 488. Up to 32 conditions per place. [2023-08-26 15:57:25,989 INFO L82 GeneralOperation]: Start removeDead. Operand has 253 places, 278 transitions, 600 flow [2023-08-26 15:57:25,999 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 253 places, 278 transitions, 600 flow [2023-08-26 15:57:26,000 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:57:26,000 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 253 places, 278 transitions, 600 flow [2023-08-26 15:57:26,000 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 253 places, 278 transitions, 600 flow [2023-08-26 15:57:26,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 253 places, 278 transitions, 600 flow [2023-08-26 15:57:26,088 INFO L124 PetriNetUnfolderBase]: 86/701 cut-off events. [2023-08-26 15:57:26,089 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 15:57:26,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 756 conditions, 701 events. 86/701 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3105 event pairs, 6 based on Foata normal form. 0/526 useless extension candidates. Maximal degree in co-relation 488. Up to 32 conditions per place. [2023-08-26 15:57:26,122 INFO L119 LiptonReduction]: Number of co-enabled transitions 43688 [2023-08-26 15:57:30,349 INFO L134 LiptonReduction]: Checked pairs total: 116804 [2023-08-26 15:57:30,350 INFO L136 LiptonReduction]: Total number of compositions: 234 [2023-08-26 15:57:30,352 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:57:30,352 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;@38446e59, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:57:30,353 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:57:30,366 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:57:30,366 INFO L124 PetriNetUnfolderBase]: 33/185 cut-off events. [2023-08-26 15:57:30,366 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-08-26 15:57:30,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:57:30,367 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-26 15:57:30,367 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:57:30,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:57:30,367 INFO L85 PathProgramCache]: Analyzing trace with hash -16162223, now seen corresponding path program 1 times [2023-08-26 15:57:30,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:57:30,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658090120] [2023-08-26 15:57:30,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:57:30,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:57:30,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:57:30,400 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:57:30,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:57:30,437 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:57:30,437 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:57:30,437 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:57:30,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 15:57:30,438 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:57:30,438 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:57:30,438 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:57:30,438 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-26 15:57:30,470 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-26 15:57:30,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 293 places, 323 transitions, 706 flow [2023-08-26 15:57:30,653 INFO L124 PetriNetUnfolderBase]: 146/1090 cut-off events. [2023-08-26 15:57:30,653 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-26 15:57:30,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1201 conditions, 1090 events. 146/1090 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5535 event pairs, 23 based on Foata normal form. 0/826 useless extension candidates. Maximal degree in co-relation 746. Up to 80 conditions per place. [2023-08-26 15:57:30,667 INFO L82 GeneralOperation]: Start removeDead. Operand has 293 places, 323 transitions, 706 flow [2023-08-26 15:57:30,676 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 293 places, 323 transitions, 706 flow [2023-08-26 15:57:30,676 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:57:30,676 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 293 places, 323 transitions, 706 flow [2023-08-26 15:57:30,677 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 293 places, 323 transitions, 706 flow [2023-08-26 15:57:30,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 293 places, 323 transitions, 706 flow [2023-08-26 15:57:30,811 INFO L124 PetriNetUnfolderBase]: 146/1090 cut-off events. [2023-08-26 15:57:30,811 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-26 15:57:30,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1201 conditions, 1090 events. 146/1090 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5535 event pairs, 23 based on Foata normal form. 0/826 useless extension candidates. Maximal degree in co-relation 746. Up to 80 conditions per place. [2023-08-26 15:57:30,872 INFO L119 LiptonReduction]: Number of co-enabled transitions 64500 [2023-08-26 15:57:35,653 INFO L134 LiptonReduction]: Checked pairs total: 194858 [2023-08-26 15:57:35,654 INFO L136 LiptonReduction]: Total number of compositions: 258 [2023-08-26 15:57:35,655 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:57:35,656 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;@38446e59, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:57:35,656 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:57:35,703 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:57:35,703 INFO L124 PetriNetUnfolderBase]: 46/251 cut-off events. [2023-08-26 15:57:35,703 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-08-26 15:57:35,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:57:35,703 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:57:35,703 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:57:35,704 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:57:35,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1682968549, now seen corresponding path program 1 times [2023-08-26 15:57:35,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:57:35,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564132037] [2023-08-26 15:57:35,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:57:35,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:57:35,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:57:35,737 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:57:35,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:57:35,786 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:57:35,786 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:57:35,787 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:57:35,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 15:57:35,787 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:57:35,787 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:57:35,788 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:57:35,788 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-26 15:57:35,828 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2023-08-26 15:57:35,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 333 places, 368 transitions, 814 flow [2023-08-26 15:57:36,119 INFO L124 PetriNetUnfolderBase]: 270/1799 cut-off events. [2023-08-26 15:57:36,120 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-08-26 15:57:36,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2031 conditions, 1799 events. 270/1799 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 10898 event pairs, 72 based on Foata normal form. 0/1382 useless extension candidates. Maximal degree in co-relation 1189. Up to 192 conditions per place. [2023-08-26 15:57:36,146 INFO L82 GeneralOperation]: Start removeDead. Operand has 333 places, 368 transitions, 814 flow [2023-08-26 15:57:36,160 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 333 places, 368 transitions, 814 flow [2023-08-26 15:57:36,161 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:57:36,161 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 333 places, 368 transitions, 814 flow [2023-08-26 15:57:36,161 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 333 places, 368 transitions, 814 flow [2023-08-26 15:57:36,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 333 places, 368 transitions, 814 flow [2023-08-26 15:57:36,461 INFO L124 PetriNetUnfolderBase]: 270/1799 cut-off events. [2023-08-26 15:57:36,462 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-08-26 15:57:36,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2031 conditions, 1799 events. 270/1799 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 10898 event pairs, 72 based on Foata normal form. 0/1382 useless extension candidates. Maximal degree in co-relation 1189. Up to 192 conditions per place. [2023-08-26 15:57:36,566 INFO L119 LiptonReduction]: Number of co-enabled transitions 89268 [2023-08-26 15:57:41,755 INFO L134 LiptonReduction]: Checked pairs total: 279324 [2023-08-26 15:57:41,756 INFO L136 LiptonReduction]: Total number of compositions: 303 [2023-08-26 15:57:41,757 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:57:41,758 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;@38446e59, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:57:41,758 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:57:41,810 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:57:41,810 INFO L124 PetriNetUnfolderBase]: 62/329 cut-off events. [2023-08-26 15:57:41,810 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2023-08-26 15:57:41,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:57:41,810 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:57:41,811 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:57:41,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:57:41,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1332303291, now seen corresponding path program 1 times [2023-08-26 15:57:41,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:57:41,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906173112] [2023-08-26 15:57:41,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:57:41,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:57:41,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:57:41,848 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:57:41,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:57:41,884 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:57:41,884 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:57:41,884 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:57:41,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 15:57:41,885 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:57:41,885 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:57:41,885 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:57:41,885 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-26 15:57:41,926 INFO L144 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2023-08-26 15:57:41,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 373 places, 413 transitions, 924 flow [2023-08-26 15:57:42,580 INFO L124 PetriNetUnfolderBase]: 538/3164 cut-off events. [2023-08-26 15:57:42,580 INFO L125 PetriNetUnfolderBase]: For 525/525 co-relation queries the response was YES. [2023-08-26 15:57:42,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3662 conditions, 3164 events. 538/3164 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 22628 event pairs, 201 based on Foata normal form. 0/2466 useless extension candidates. Maximal degree in co-relation 2017. Up to 448 conditions per place. [2023-08-26 15:57:42,689 INFO L82 GeneralOperation]: Start removeDead. Operand has 373 places, 413 transitions, 924 flow [2023-08-26 15:57:42,713 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 373 places, 413 transitions, 924 flow [2023-08-26 15:57:42,713 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:57:42,713 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 373 places, 413 transitions, 924 flow [2023-08-26 15:57:42,714 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 373 places, 413 transitions, 924 flow [2023-08-26 15:57:42,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 373 places, 413 transitions, 924 flow [2023-08-26 15:57:43,363 INFO L124 PetriNetUnfolderBase]: 538/3164 cut-off events. [2023-08-26 15:57:43,364 INFO L125 PetriNetUnfolderBase]: For 525/525 co-relation queries the response was YES. [2023-08-26 15:57:43,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3662 conditions, 3164 events. 538/3164 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 22628 event pairs, 201 based on Foata normal form. 0/2466 useless extension candidates. Maximal degree in co-relation 2017. Up to 448 conditions per place. [2023-08-26 15:57:43,504 INFO L119 LiptonReduction]: Number of co-enabled transitions 117992 [2023-08-26 15:57:49,022 INFO L134 LiptonReduction]: Checked pairs total: 374007 [2023-08-26 15:57:49,022 INFO L136 LiptonReduction]: Total number of compositions: 332 [2023-08-26 15:57:49,024 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:57:49,024 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;@38446e59, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:57:49,025 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:57:49,074 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:57:49,075 INFO L124 PetriNetUnfolderBase]: 83/431 cut-off events. [2023-08-26 15:57:49,075 INFO L125 PetriNetUnfolderBase]: For 129/129 co-relation queries the response was YES. [2023-08-26 15:57:49,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:57:49,075 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:57:49,075 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:57:49,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:57:49,075 INFO L85 PathProgramCache]: Analyzing trace with hash 623856872, now seen corresponding path program 1 times [2023-08-26 15:57:49,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:57:49,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098996251] [2023-08-26 15:57:49,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:57:49,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:57:49,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:57:49,120 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:57:49,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:57:49,150 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:57:49,150 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:57:49,151 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:57:49,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 15:57:49,151 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:57:49,151 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:57:49,151 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:57:49,151 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-08-26 15:57:49,191 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-26 15:57:49,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 413 places, 458 transitions, 1036 flow [2023-08-26 15:57:50,438 INFO L124 PetriNetUnfolderBase]: 1126/5873 cut-off events. [2023-08-26 15:57:50,438 INFO L125 PetriNetUnfolderBase]: For 1136/1136 co-relation queries the response was YES. [2023-08-26 15:57:50,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6958 conditions, 5873 events. 1126/5873 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 49795 event pairs, 522 based on Foata normal form. 0/4638 useless extension candidates. Maximal degree in co-relation 3646. Up to 1024 conditions per place. [2023-08-26 15:57:50,528 INFO L82 GeneralOperation]: Start removeDead. Operand has 413 places, 458 transitions, 1036 flow [2023-08-26 15:57:50,588 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 413 places, 458 transitions, 1036 flow [2023-08-26 15:57:50,589 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:57:50,589 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 413 places, 458 transitions, 1036 flow [2023-08-26 15:57:50,589 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 413 places, 458 transitions, 1036 flow [2023-08-26 15:57:50,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 413 places, 458 transitions, 1036 flow [2023-08-26 15:57:51,773 INFO L124 PetriNetUnfolderBase]: 1126/5873 cut-off events. [2023-08-26 15:57:51,773 INFO L125 PetriNetUnfolderBase]: For 1136/1136 co-relation queries the response was YES. [2023-08-26 15:57:51,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6958 conditions, 5873 events. 1126/5873 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 49795 event pairs, 522 based on Foata normal form. 0/4638 useless extension candidates. Maximal degree in co-relation 3646. Up to 1024 conditions per place. [2023-08-26 15:57:52,179 INFO L119 LiptonReduction]: Number of co-enabled transitions 150672 [2023-08-26 15:57:58,174 INFO L134 LiptonReduction]: Checked pairs total: 435918 [2023-08-26 15:57:58,174 INFO L136 LiptonReduction]: Total number of compositions: 365 [2023-08-26 15:57:58,176 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:57:58,177 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;@38446e59, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:57:58,177 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:57:58,248 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:57:58,248 INFO L124 PetriNetUnfolderBase]: 105/551 cut-off events. [2023-08-26 15:57:58,249 INFO L125 PetriNetUnfolderBase]: For 202/202 co-relation queries the response was YES. [2023-08-26 15:57:58,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:57:58,249 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:57:58,249 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:57:58,249 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:57:58,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1625997701, now seen corresponding path program 1 times [2023-08-26 15:57:58,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:57:58,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017808431] [2023-08-26 15:57:58,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:57:58,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:57:58,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:57:58,271 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:57:58,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:57:58,293 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:57:58,293 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:57:58,293 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:57:58,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 15:57:58,293 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:57:58,294 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:57:58,294 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:57:58,294 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-08-26 15:57:58,337 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-26 15:57:58,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 453 places, 503 transitions, 1150 flow [2023-08-26 15:58:00,678 INFO L124 PetriNetUnfolderBase]: 2418/11334 cut-off events. [2023-08-26 15:58:00,678 INFO L125 PetriNetUnfolderBase]: For 2460/2460 co-relation queries the response was YES. [2023-08-26 15:58:00,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13711 conditions, 11334 events. 2418/11334 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 111024 event pairs, 1291 based on Foata normal form. 0/9050 useless extension candidates. Maximal degree in co-relation 6940. Up to 2304 conditions per place. [2023-08-26 15:58:00,994 INFO L82 GeneralOperation]: Start removeDead. Operand has 453 places, 503 transitions, 1150 flow [2023-08-26 15:58:01,486 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 453 places, 503 transitions, 1150 flow [2023-08-26 15:58:01,487 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:58:01,487 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 453 places, 503 transitions, 1150 flow [2023-08-26 15:58:01,488 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 453 places, 503 transitions, 1150 flow [2023-08-26 15:58:01,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 453 places, 503 transitions, 1150 flow [2023-08-26 15:58:04,014 INFO L124 PetriNetUnfolderBase]: 2418/11334 cut-off events. [2023-08-26 15:58:04,014 INFO L125 PetriNetUnfolderBase]: For 2460/2460 co-relation queries the response was YES. [2023-08-26 15:58:04,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13711 conditions, 11334 events. 2418/11334 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 111024 event pairs, 1291 based on Foata normal form. 0/9050 useless extension candidates. Maximal degree in co-relation 6940. Up to 2304 conditions per place. [2023-08-26 15:58:04,856 INFO L119 LiptonReduction]: Number of co-enabled transitions 187308 [2023-08-26 15:58:11,168 INFO L134 LiptonReduction]: Checked pairs total: 548437 [2023-08-26 15:58:11,168 INFO L136 LiptonReduction]: Total number of compositions: 400 [2023-08-26 15:58:11,170 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:58:11,170 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;@38446e59, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:58:11,170 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:58:11,238 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:58:11,238 INFO L124 PetriNetUnfolderBase]: 150/734 cut-off events. [2023-08-26 15:58:11,238 INFO L125 PetriNetUnfolderBase]: For 309/309 co-relation queries the response was YES. [2023-08-26 15:58:11,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:58:11,238 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:58:11,239 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:58:11,239 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:58:11,239 INFO L85 PathProgramCache]: Analyzing trace with hash -872550911, now seen corresponding path program 1 times [2023-08-26 15:58:11,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:58:11,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006367638] [2023-08-26 15:58:11,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:58:11,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:58:11,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:58:11,260 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:58:11,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:58:11,280 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:58:11,280 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:58:11,280 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:58:11,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 15:58:11,280 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:58:11,281 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:58:11,281 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:58:11,281 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-08-26 15:58:11,322 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2023-08-26 15:58:11,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 493 places, 548 transitions, 1266 flow [2023-08-26 15:58:16,828 INFO L124 PetriNetUnfolderBase]: 5246/22427 cut-off events. [2023-08-26 15:58:16,828 INFO L125 PetriNetUnfolderBase]: For 5330/5330 co-relation queries the response was YES. [2023-08-26 15:58:17,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27633 conditions, 22427 events. 5246/22427 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 249142 event pairs, 3084 based on Foata normal form. 0/18070 useless extension candidates. Maximal degree in co-relation 13691. Up to 5120 conditions per place. [2023-08-26 15:58:17,302 INFO L82 GeneralOperation]: Start removeDead. Operand has 493 places, 548 transitions, 1266 flow [2023-08-26 15:58:17,522 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 493 places, 548 transitions, 1266 flow [2023-08-26 15:58:17,522 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:58:17,522 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 493 places, 548 transitions, 1266 flow [2023-08-26 15:58:17,522 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 493 places, 548 transitions, 1266 flow [2023-08-26 15:58:17,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 493 places, 548 transitions, 1266 flow [2023-08-26 15:58:23,113 INFO L124 PetriNetUnfolderBase]: 5246/22427 cut-off events. [2023-08-26 15:58:23,113 INFO L125 PetriNetUnfolderBase]: For 5330/5330 co-relation queries the response was YES. [2023-08-26 15:58:23,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27633 conditions, 22427 events. 5246/22427 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 249142 event pairs, 3084 based on Foata normal form. 0/18070 useless extension candidates. Maximal degree in co-relation 13691. Up to 5120 conditions per place. [2023-08-26 15:58:24,689 INFO L119 LiptonReduction]: Number of co-enabled transitions 227900 [2023-08-26 15:58:31,242 INFO L134 LiptonReduction]: Checked pairs total: 675574 [2023-08-26 15:58:31,242 INFO L136 LiptonReduction]: Total number of compositions: 424 [2023-08-26 15:58:31,243 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:58:31,244 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;@38446e59, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:58:31,244 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:58:31,369 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:58:31,369 INFO L124 PetriNetUnfolderBase]: 224/1004 cut-off events. [2023-08-26 15:58:31,369 INFO L125 PetriNetUnfolderBase]: For 469/469 co-relation queries the response was YES. [2023-08-26 15:58:31,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:58:31,369 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:58:31,369 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:58:31,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:58:31,370 INFO L85 PathProgramCache]: Analyzing trace with hash 694509962, now seen corresponding path program 1 times [2023-08-26 15:58:31,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:58:31,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709150707] [2023-08-26 15:58:31,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:58:31,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:58:31,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:58:31,395 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:58:31,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:58:31,419 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:58:31,419 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:58:31,419 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:58:31,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 15:58:31,420 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:58:31,420 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:58:31,420 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:58:31,420 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-08-26 15:58:31,473 INFO L144 ThreadInstanceAdder]: Constructed 11 joinOtherThreadTransitions. [2023-08-26 15:58:31,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 533 places, 593 transitions, 1384 flow [2023-08-26 15:58:43,229 INFO L124 PetriNetUnfolderBase]: 11402/45040 cut-off events. [2023-08-26 15:58:43,229 INFO L125 PetriNetUnfolderBase]: For 11539/11539 co-relation queries the response was YES. [2023-08-26 15:58:44,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56404 conditions, 45040 events. 11402/45040 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 1134. Compared 555679 event pairs, 7181 based on Foata normal form. 0/36562 useless extension candidates. Maximal degree in co-relation 27611. Up to 11264 conditions per place. [2023-08-26 15:58:44,476 INFO L82 GeneralOperation]: Start removeDead. Operand has 533 places, 593 transitions, 1384 flow [2023-08-26 15:58:45,305 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 533 places, 593 transitions, 1384 flow [2023-08-26 15:58:45,305 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:58:45,305 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 533 places, 593 transitions, 1384 flow [2023-08-26 15:58:45,305 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 533 places, 593 transitions, 1384 flow [2023-08-26 15:58:45,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 533 places, 593 transitions, 1384 flow [2023-08-26 15:58:57,339 INFO L124 PetriNetUnfolderBase]: 11402/45040 cut-off events. [2023-08-26 15:58:57,339 INFO L125 PetriNetUnfolderBase]: For 11539/11539 co-relation queries the response was YES. [2023-08-26 15:58:58,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56404 conditions, 45040 events. 11402/45040 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 1134. Compared 555679 event pairs, 7181 based on Foata normal form. 0/36562 useless extension candidates. Maximal degree in co-relation 27611. Up to 11264 conditions per place. [2023-08-26 15:59:01,565 INFO L119 LiptonReduction]: Number of co-enabled transitions 272448 [2023-08-26 15:59:08,718 INFO L134 LiptonReduction]: Checked pairs total: 811264 [2023-08-26 15:59:08,718 INFO L136 LiptonReduction]: Total number of compositions: 465 [2023-08-26 15:59:08,720 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:59:08,720 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;@38446e59, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:59:08,720 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:59:08,844 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:59:08,844 INFO L124 PetriNetUnfolderBase]: 349/1413 cut-off events. [2023-08-26 15:59:08,844 INFO L125 PetriNetUnfolderBase]: For 713/713 co-relation queries the response was YES. [2023-08-26 15:59:08,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:59:08,844 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:59:08,845 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:59:08,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:59:08,845 INFO L85 PathProgramCache]: Analyzing trace with hash -117200278, now seen corresponding path program 1 times [2023-08-26 15:59:08,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:59:08,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769528792] [2023-08-26 15:59:08,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:59:08,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:59:08,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:59:08,883 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:59:08,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:59:08,915 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:59:08,916 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:59:08,916 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:59:08,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 15:59:08,916 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:59:08,916 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:59:08,917 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:59:08,917 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-08-26 15:59:08,963 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2023-08-26 15:59:08,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 573 places, 638 transitions, 1504 flow [2023-08-26 15:59:39,582 INFO L124 PetriNetUnfolderBase]: 24726/91205 cut-off events. [2023-08-26 15:59:39,582 INFO L125 PetriNetUnfolderBase]: For 24928/24928 co-relation queries the response was YES. [2023-08-26 15:59:45,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115896 conditions, 91205 events. 24726/91205 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 2194. Compared 1229514 event pairs, 16398 based on Foata normal form. 0/74510 useless extension candidates. Maximal degree in co-relation 56380. Up to 24576 conditions per place. [2023-08-26 15:59:45,650 INFO L82 GeneralOperation]: Start removeDead. Operand has 573 places, 638 transitions, 1504 flow [2023-08-26 15:59:47,396 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 573 places, 638 transitions, 1504 flow [2023-08-26 15:59:47,396 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:59:47,396 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 573 places, 638 transitions, 1504 flow [2023-08-26 15:59:47,397 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 573 places, 638 transitions, 1504 flow [2023-08-26 15:59:47,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 573 places, 638 transitions, 1504 flow [2023-08-26 16:00:14,187 INFO L124 PetriNetUnfolderBase]: 24726/91205 cut-off events. [2023-08-26 16:00:14,187 INFO L125 PetriNetUnfolderBase]: For 24928/24928 co-relation queries the response was YES. [2023-08-26 16:00:20,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115896 conditions, 91205 events. 24726/91205 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 2194. Compared 1229514 event pairs, 16398 based on Foata normal form. 0/74510 useless extension candidates. Maximal degree in co-relation 56380. Up to 24576 conditions per place. [2023-08-26 16:00:28,374 INFO L119 LiptonReduction]: Number of co-enabled transitions 320952 [2023-08-26 16:00:35,659 INFO L134 LiptonReduction]: Checked pairs total: 960751 [2023-08-26 16:00:35,660 INFO L136 LiptonReduction]: Total number of compositions: 498 [2023-08-26 16:00:35,661 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 16:00:35,661 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;@38446e59, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 16:00:35,661 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 16:00:35,922 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 16:00:35,922 INFO L124 PetriNetUnfolderBase]: 560/2042 cut-off events. [2023-08-26 16:00:35,922 INFO L125 PetriNetUnfolderBase]: For 1089/1089 co-relation queries the response was YES. [2023-08-26 16:00:35,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:00:35,923 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:00:35,923 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 16:00:35,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:00:35,923 INFO L85 PathProgramCache]: Analyzing trace with hash 667293789, now seen corresponding path program 1 times [2023-08-26 16:00:35,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:00:35,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6016600] [2023-08-26 16:00:35,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:00:35,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:00:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 16:00:35,966 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 16:00:35,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 16:00:35,995 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 16:00:35,995 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 16:00:35,995 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 16:00:35,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 16:00:35,996 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 16:00:35,996 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 16:00:35,996 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 16:00:35,996 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-08-26 16:00:36,051 INFO L144 ThreadInstanceAdder]: Constructed 13 joinOtherThreadTransitions. [2023-08-26 16:00:36,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 613 places, 683 transitions, 1626 flow [2023-08-26 16:01:36,446 INFO L124 PetriNetUnfolderBase]: 53410/185498 cut-off events. [2023-08-26 16:01:36,446 INFO L125 PetriNetUnfolderBase]: For 53690/53690 co-relation queries the response was YES. [2023-08-26 16:01:51,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238877 conditions, 185498 events. 53410/185498 cut-off events. For 53690/53690 co-relation queries the response was YES. Maximal size of possible extension queue 4208. Compared 2708735 event pairs, 36879 based on Foata normal form. 0/152394 useless extension candidates. Maximal degree in co-relation 115870. Up to 53248 conditions per place. [2023-08-26 16:01:51,410 INFO L82 GeneralOperation]: Start removeDead. Operand has 613 places, 683 transitions, 1626 flow [2023-08-26 16:01:57,641 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 613 places, 683 transitions, 1626 flow [2023-08-26 16:01:57,642 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 16:01:57,642 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 613 places, 683 transitions, 1626 flow [2023-08-26 16:01:57,642 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 613 places, 683 transitions, 1626 flow [2023-08-26 16:01:57,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 613 places, 683 transitions, 1626 flow