/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_04-munge_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 15:34:26,565 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 15:34:26,638 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 15:34:26,642 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 15:34:26,643 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 15:34:26,662 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 15:34:26,663 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 15:34:26,663 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 15:34:26,664 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 15:34:26,664 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 15:34:26,664 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 15:34:26,665 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 15:34:26,665 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 15:34:26,665 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 15:34:26,666 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 15:34:26,666 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 15:34:26,666 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 15:34:26,667 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 15:34:26,667 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 15:34:26,667 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 15:34:26,668 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 15:34:26,668 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 15:34:26,668 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 15:34:26,669 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 15:34:26,669 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 15:34:26,669 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 15:34:26,669 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 15:34:26,670 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:34:26,670 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 15:34:26,670 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 15:34:26,671 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 15:34:26,671 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 15:34:26,671 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 15:34:26,671 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 15:34:26,672 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 15:34:26,672 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 15:34:27,000 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 15:34:27,018 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 15:34:27,020 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 15:34:27,021 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 15:34:27,022 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 15:34:27,023 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_04-munge_racefree.i [2023-08-26 15:34:28,278 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 15:34:28,538 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 15:34:28,538 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_04-munge_racefree.i [2023-08-26 15:34:28,550 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd2ed9205/7448364f9afe4665a4520f9a67913aad/FLAGf1042dd89 [2023-08-26 15:34:28,562 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd2ed9205/7448364f9afe4665a4520f9a67913aad [2023-08-26 15:34:28,564 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 15:34:28,565 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 15:34:28,566 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 15:34:28,566 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 15:34:28,568 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 15:34:28,569 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:34:28" (1/1) ... [2023-08-26 15:34:28,569 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5507c91e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:34:28, skipping insertion in model container [2023-08-26 15:34:28,570 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:34:28" (1/1) ... [2023-08-26 15:34:28,602 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 15:34:28,928 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:34:28,945 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 15:34:28,972 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 15:34:28,974 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 15:34:29,010 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:34:29,054 INFO L206 MainTranslator]: Completed translation [2023-08-26 15:34:29,054 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:34:29 WrapperNode [2023-08-26 15:34:29,054 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 15:34:29,055 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 15:34:29,056 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 15:34:29,056 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 15:34:29,061 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:34:29" (1/1) ... [2023-08-26 15:34:29,090 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:34:29" (1/1) ... [2023-08-26 15:34:29,116 INFO L138 Inliner]: procedures = 172, calls = 38, calls flagged for inlining = 6, calls inlined = 8, statements flattened = 212 [2023-08-26 15:34:29,117 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 15:34:29,117 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 15:34:29,117 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 15:34:29,117 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 15:34:29,125 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:34:29" (1/1) ... [2023-08-26 15:34:29,125 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:34:29" (1/1) ... [2023-08-26 15:34:29,128 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:34:29" (1/1) ... [2023-08-26 15:34:29,128 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:34:29" (1/1) ... [2023-08-26 15:34:29,135 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:34:29" (1/1) ... [2023-08-26 15:34:29,140 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:34:29" (1/1) ... [2023-08-26 15:34:29,142 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:34:29" (1/1) ... [2023-08-26 15:34:29,143 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:34:29" (1/1) ... [2023-08-26 15:34:29,146 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 15:34:29,146 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 15:34:29,147 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 15:34:29,147 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 15:34:29,147 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:34:29" (1/1) ... [2023-08-26 15:34:29,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:34:29,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:34:29,174 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 15:34:29,216 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 15:34:29,227 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 15:34:29,227 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-08-26 15:34:29,227 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-08-26 15:34:29,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 15:34:29,228 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 15:34:29,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 15:34:29,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 15:34:29,229 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-08-26 15:34:29,229 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-08-26 15:34:29,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 15:34:29,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 15:34:29,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 15:34:29,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 15:34:29,231 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 15:34:29,407 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 15:34:29,408 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 15:34:29,735 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 15:34:29,749 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 15:34:29,750 INFO L302 CfgBuilder]: Removed 24 assume(true) statements. [2023-08-26 15:34:29,752 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:34:29 BoogieIcfgContainer [2023-08-26 15:34:29,752 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 15:34:29,756 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 15:34:29,756 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 15:34:29,759 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 15:34:29,759 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 03:34:28" (1/3) ... [2023-08-26 15:34:29,760 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4132e3b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:34:29, skipping insertion in model container [2023-08-26 15:34:29,760 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:34:29" (2/3) ... [2023-08-26 15:34:29,760 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4132e3b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:34:29, skipping insertion in model container [2023-08-26 15:34:29,761 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:34:29" (3/3) ... [2023-08-26 15:34:29,762 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_04-munge_racefree.i [2023-08-26 15:34:29,776 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 15:34:29,776 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-08-26 15:34:29,776 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 15:34:29,850 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-26 15:34:29,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 220 transitions, 462 flow [2023-08-26 15:34:30,048 INFO L124 PetriNetUnfolderBase]: 61/412 cut-off events. [2023-08-26 15:34:30,049 INFO L125 PetriNetUnfolderBase]: For 8/10 co-relation queries the response was YES. [2023-08-26 15:34:30,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 412 events. 61/412 cut-off events. For 8/10 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1846 event pairs, 0 based on Foata normal form. 0/314 useless extension candidates. Maximal degree in co-relation 218. Up to 8 conditions per place. [2023-08-26 15:34:30,061 INFO L82 GeneralOperation]: Start removeDead. Operand has 191 places, 220 transitions, 462 flow [2023-08-26 15:34:30,073 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 191 places, 220 transitions, 462 flow [2023-08-26 15:34:30,077 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:34:30,085 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 191 places, 220 transitions, 462 flow [2023-08-26 15:34:30,088 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 191 places, 220 transitions, 462 flow [2023-08-26 15:34:30,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 220 transitions, 462 flow [2023-08-26 15:34:30,145 INFO L124 PetriNetUnfolderBase]: 61/412 cut-off events. [2023-08-26 15:34:30,146 INFO L125 PetriNetUnfolderBase]: For 8/10 co-relation queries the response was YES. [2023-08-26 15:34:30,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 412 events. 61/412 cut-off events. For 8/10 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1846 event pairs, 0 based on Foata normal form. 0/314 useless extension candidates. Maximal degree in co-relation 218. Up to 8 conditions per place. [2023-08-26 15:34:30,161 INFO L119 LiptonReduction]: Number of co-enabled transitions 19952 [2023-08-26 15:34:33,942 INFO L134 LiptonReduction]: Checked pairs total: 35589 [2023-08-26 15:34:33,942 INFO L136 LiptonReduction]: Total number of compositions: 168 [2023-08-26 15:34:33,953 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:34:33,958 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;@522f0a5e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:34:33,959 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-26 15:34:33,963 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:34:33,964 INFO L124 PetriNetUnfolderBase]: 3/35 cut-off events. [2023-08-26 15:34:33,964 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:34:33,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:34:33,964 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-26 15:34:33,965 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:34:33,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:34:33,969 INFO L85 PathProgramCache]: Analyzing trace with hash 488732402, now seen corresponding path program 1 times [2023-08-26 15:34:33,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:34:33,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088191150] [2023-08-26 15:34:33,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:34:33,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:34:34,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:34:34,079 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:34:34,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:34:34,120 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:34:34,121 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:34:34,122 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-26 15:34:34,124 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-26 15:34:34,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 15:34:34,124 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:34:34,127 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-26 15:34:34,127 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:34:34,127 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-26 15:34:34,175 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-26 15:34:34,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 287 places, 342 transitions, 732 flow [2023-08-26 15:34:34,376 INFO L124 PetriNetUnfolderBase]: 205/1210 cut-off events. [2023-08-26 15:34:34,377 INFO L125 PetriNetUnfolderBase]: For 72/78 co-relation queries the response was YES. [2023-08-26 15:34:34,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1307 conditions, 1210 events. 205/1210 cut-off events. For 72/78 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 7457 event pairs, 1 based on Foata normal form. 0/922 useless extension candidates. Maximal degree in co-relation 735. Up to 32 conditions per place. [2023-08-26 15:34:34,433 INFO L82 GeneralOperation]: Start removeDead. Operand has 287 places, 342 transitions, 732 flow [2023-08-26 15:34:34,444 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 287 places, 342 transitions, 732 flow [2023-08-26 15:34:34,445 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:34:34,445 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 287 places, 342 transitions, 732 flow [2023-08-26 15:34:34,445 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 287 places, 342 transitions, 732 flow [2023-08-26 15:34:34,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 287 places, 342 transitions, 732 flow [2023-08-26 15:34:34,652 INFO L124 PetriNetUnfolderBase]: 205/1210 cut-off events. [2023-08-26 15:34:34,652 INFO L125 PetriNetUnfolderBase]: For 72/78 co-relation queries the response was YES. [2023-08-26 15:34:34,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1307 conditions, 1210 events. 205/1210 cut-off events. For 72/78 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 7457 event pairs, 1 based on Foata normal form. 0/922 useless extension candidates. Maximal degree in co-relation 735. Up to 32 conditions per place. [2023-08-26 15:34:34,737 INFO L119 LiptonReduction]: Number of co-enabled transitions 69136 [2023-08-26 15:34:39,259 INFO L134 LiptonReduction]: Checked pairs total: 161594 [2023-08-26 15:34:39,260 INFO L136 LiptonReduction]: Total number of compositions: 254 [2023-08-26 15:34:39,264 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:34:39,270 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;@522f0a5e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:34:39,270 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-26 15:34:39,283 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:34:39,283 INFO L124 PetriNetUnfolderBase]: 36/169 cut-off events. [2023-08-26 15:34:39,283 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-26 15:34:39,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:34:39,284 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-26 15:34:39,284 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:34:39,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:34:39,285 INFO L85 PathProgramCache]: Analyzing trace with hash 705077868, now seen corresponding path program 1 times [2023-08-26 15:34:39,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:34:39,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398853438] [2023-08-26 15:34:39,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:34:39,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:34:39,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:34:39,352 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:34:39,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:34:39,389 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:34:39,389 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:34:39,390 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-26 15:34:39,390 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-26 15:34:39,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 15:34:39,390 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:34:39,401 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-26 15:34:39,401 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:34:39,402 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-26 15:34:39,464 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2023-08-26 15:34:39,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 383 places, 464 transitions, 1006 flow [2023-08-26 15:34:40,223 INFO L124 PetriNetUnfolderBase]: 679/3500 cut-off events. [2023-08-26 15:34:40,223 INFO L125 PetriNetUnfolderBase]: For 419/431 co-relation queries the response was YES. [2023-08-26 15:34:40,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3951 conditions, 3500 events. 679/3500 cut-off events. For 419/431 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 27018 event pairs, 32 based on Foata normal form. 0/2698 useless extension candidates. Maximal degree in co-relation 2208. Up to 192 conditions per place. [2023-08-26 15:34:40,293 INFO L82 GeneralOperation]: Start removeDead. Operand has 383 places, 464 transitions, 1006 flow [2023-08-26 15:34:40,336 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 383 places, 464 transitions, 1006 flow [2023-08-26 15:34:40,336 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:34:40,336 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 383 places, 464 transitions, 1006 flow [2023-08-26 15:34:40,336 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 383 places, 464 transitions, 1006 flow [2023-08-26 15:34:40,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 383 places, 464 transitions, 1006 flow [2023-08-26 15:34:41,092 INFO L124 PetriNetUnfolderBase]: 679/3500 cut-off events. [2023-08-26 15:34:41,092 INFO L125 PetriNetUnfolderBase]: For 419/431 co-relation queries the response was YES. [2023-08-26 15:34:41,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3951 conditions, 3500 events. 679/3500 cut-off events. For 419/431 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 27018 event pairs, 32 based on Foata normal form. 0/2698 useless extension candidates. Maximal degree in co-relation 2208. Up to 192 conditions per place. [2023-08-26 15:34:41,446 INFO L119 LiptonReduction]: Number of co-enabled transitions 147552 [2023-08-26 15:34:46,376 INFO L134 LiptonReduction]: Checked pairs total: 361320 [2023-08-26 15:34:46,377 INFO L136 LiptonReduction]: Total number of compositions: 330 [2023-08-26 15:34:46,378 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:34:46,379 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;@522f0a5e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:34:46,379 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-26 15:34:46,397 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:34:46,397 INFO L124 PetriNetUnfolderBase]: 81/338 cut-off events. [2023-08-26 15:34:46,397 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2023-08-26 15:34:46,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:34:46,398 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-26 15:34:46,398 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:34:46,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:34:46,398 INFO L85 PathProgramCache]: Analyzing trace with hash 885415054, now seen corresponding path program 1 times [2023-08-26 15:34:46,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:34:46,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143168240] [2023-08-26 15:34:46,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:34:46,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:34:46,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:34:46,432 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:34:46,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:34:46,454 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:34:46,454 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:34:46,455 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-26 15:34:46,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-26 15:34:46,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 15:34:46,455 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:34:46,456 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-26 15:34:46,456 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:34:46,456 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-26 15:34:46,501 INFO L144 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2023-08-26 15:34:46,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 479 places, 586 transitions, 1284 flow [2023-08-26 15:34:49,962 INFO L124 PetriNetUnfolderBase]: 2671/11602 cut-off events. [2023-08-26 15:34:49,964 INFO L125 PetriNetUnfolderBase]: For 2144/2159 co-relation queries the response was YES. [2023-08-26 15:34:50,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13767 conditions, 11602 events. 2671/11602 cut-off events. For 2144/2159 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 111744 event pairs, 626 based on Foata normal form. 0/9098 useless extension candidates. Maximal degree in co-relation 7204. Up to 1024 conditions per place. [2023-08-26 15:34:50,386 INFO L82 GeneralOperation]: Start removeDead. Operand has 479 places, 586 transitions, 1284 flow [2023-08-26 15:34:50,652 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 479 places, 586 transitions, 1284 flow [2023-08-26 15:34:50,653 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:34:50,653 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 479 places, 586 transitions, 1284 flow [2023-08-26 15:34:50,653 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 479 places, 586 transitions, 1284 flow [2023-08-26 15:34:50,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 479 places, 586 transitions, 1284 flow [2023-08-26 15:34:53,559 INFO L124 PetriNetUnfolderBase]: 2671/11602 cut-off events. [2023-08-26 15:34:53,559 INFO L125 PetriNetUnfolderBase]: For 2144/2159 co-relation queries the response was YES. [2023-08-26 15:34:53,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13767 conditions, 11602 events. 2671/11602 cut-off events. For 2144/2159 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 111744 event pairs, 626 based on Foata normal form. 0/9098 useless extension candidates. Maximal degree in co-relation 7204. Up to 1024 conditions per place. [2023-08-26 15:34:54,567 INFO L119 LiptonReduction]: Number of co-enabled transitions 255200 [2023-08-26 15:34:59,928 INFO L134 LiptonReduction]: Checked pairs total: 571269 [2023-08-26 15:34:59,928 INFO L136 LiptonReduction]: Total number of compositions: 410 [2023-08-26 15:34:59,930 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:34:59,931 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;@522f0a5e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:34:59,931 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-26 15:34:59,965 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:34:59,965 INFO L124 PetriNetUnfolderBase]: 142/584 cut-off events. [2023-08-26 15:34:59,965 INFO L125 PetriNetUnfolderBase]: For 90/90 co-relation queries the response was YES. [2023-08-26 15:34:59,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:34:59,965 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-26 15:34:59,966 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:34:59,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:34:59,966 INFO L85 PathProgramCache]: Analyzing trace with hash -2017426015, now seen corresponding path program 1 times [2023-08-26 15:34:59,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:34:59,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850889173] [2023-08-26 15:34:59,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:34:59,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:34:59,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:34:59,990 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:35:00,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:35:00,013 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:35:00,013 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:35:00,013 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-26 15:35:00,013 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-26 15:35:00,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 15:35:00,014 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:35:00,014 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-26 15:35:00,014 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:35:00,014 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-26 15:35:00,064 INFO L144 ThreadInstanceAdder]: Constructed 20 joinOtherThreadTransitions. [2023-08-26 15:35:00,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 575 places, 708 transitions, 1566 flow [2023-08-26 15:35:15,776 INFO L124 PetriNetUnfolderBase]: 11797/43660 cut-off events. [2023-08-26 15:35:15,776 INFO L125 PetriNetUnfolderBase]: For 10450/10480 co-relation queries the response was YES. [2023-08-26 15:35:17,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54086 conditions, 43660 events. 11797/43660 cut-off events. For 10450/10480 co-relation queries the response was YES. Maximal size of possible extension queue 726. Compared 513514 event pairs, 3797 based on Foata normal form. 0/34810 useless extension candidates. Maximal degree in co-relation 26958. Up to 5120 conditions per place. [2023-08-26 15:35:17,862 INFO L82 GeneralOperation]: Start removeDead. Operand has 575 places, 708 transitions, 1566 flow [2023-08-26 15:35:18,706 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 575 places, 708 transitions, 1566 flow [2023-08-26 15:35:18,706 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:35:18,706 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 575 places, 708 transitions, 1566 flow [2023-08-26 15:35:18,706 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 575 places, 708 transitions, 1566 flow [2023-08-26 15:35:18,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 575 places, 708 transitions, 1566 flow [2023-08-26 15:35:33,366 INFO L124 PetriNetUnfolderBase]: 11797/43660 cut-off events. [2023-08-26 15:35:33,367 INFO L125 PetriNetUnfolderBase]: For 10450/10480 co-relation queries the response was YES. [2023-08-26 15:35:35,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54086 conditions, 43660 events. 11797/43660 cut-off events. For 10450/10480 co-relation queries the response was YES. Maximal size of possible extension queue 726. Compared 513514 event pairs, 3797 based on Foata normal form. 0/34810 useless extension candidates. Maximal degree in co-relation 26958. Up to 5120 conditions per place. [2023-08-26 15:35:39,601 INFO L119 LiptonReduction]: Number of co-enabled transitions 392080 [2023-08-26 15:35:45,731 INFO L134 LiptonReduction]: Checked pairs total: 1008136 [2023-08-26 15:35:45,731 INFO L136 LiptonReduction]: Total number of compositions: 491 [2023-08-26 15:35:45,733 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:35:45,733 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;@522f0a5e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:35:45,733 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-26 15:35:45,810 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:35:45,810 INFO L124 PetriNetUnfolderBase]: 252/984 cut-off events. [2023-08-26 15:35:45,810 INFO L125 PetriNetUnfolderBase]: For 199/199 co-relation queries the response was YES. [2023-08-26 15:35:45,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:35:45,810 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:35:45,810 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:35:45,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:35:45,811 INFO L85 PathProgramCache]: Analyzing trace with hash 640286225, now seen corresponding path program 1 times [2023-08-26 15:35:45,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:35:45,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380613852] [2023-08-26 15:35:45,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:35:45,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:35:45,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:35:45,835 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:35:45,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:35:45,868 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:35:45,868 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:35:45,868 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-26 15:35:45,868 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-26 15:35:45,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 15:35:45,874 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:35:45,875 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-26 15:35:45,875 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:35:45,875 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-26 15:35:45,936 INFO L144 ThreadInstanceAdder]: Constructed 24 joinOtherThreadTransitions. [2023-08-26 15:35:45,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 671 places, 830 transitions, 1852 flow [2023-08-26 15:37:03,506 INFO L124 PetriNetUnfolderBase]: 53977/175706 cut-off events. [2023-08-26 15:37:03,506 INFO L125 PetriNetUnfolderBase]: For 49552/49594 co-relation queries the response was YES. [2023-08-26 15:37:23,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225135 conditions, 175706 events. 53977/175706 cut-off events. For 49552/49594 co-relation queries the response was YES. Maximal size of possible extension queue 2723. Compared 2435423 event pairs, 20292 based on Foata normal form. 0/142042 useless extension candidates. Maximal degree in co-relation 109857. Up to 24576 conditions per place. [2023-08-26 15:37:23,461 INFO L82 GeneralOperation]: Start removeDead. Operand has 671 places, 830 transitions, 1852 flow [2023-08-26 15:37:31,689 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 671 places, 830 transitions, 1852 flow [2023-08-26 15:37:31,689 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:37:31,689 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 671 places, 830 transitions, 1852 flow [2023-08-26 15:37:31,690 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 671 places, 830 transitions, 1852 flow [2023-08-26 15:37:31,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 671 places, 830 transitions, 1852 flow