/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_94-alloc_region_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 16:09:24,895 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 16:09:24,941 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 16:09:24,944 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 16:09:24,945 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 16:09:24,964 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 16:09:24,964 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 16:09:24,965 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 16:09:24,965 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 16:09:24,965 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 16:09:24,966 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 16:09:24,966 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 16:09:24,966 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 16:09:24,967 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 16:09:24,967 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 16:09:24,967 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 16:09:24,968 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 16:09:24,968 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 16:09:24,968 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 16:09:24,969 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 16:09:24,969 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 16:09:24,969 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 16:09:24,970 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 16:09:24,970 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 16:09:24,970 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 16:09:24,971 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 16:09:24,971 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 16:09:24,971 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 16:09:24,971 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 16:09:24,972 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 16:09:24,972 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 16:09:24,972 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 16:09:24,973 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 16:09:24,973 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 16:09:24,973 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 16:09:24,974 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 16:09:25,254 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 16:09:25,271 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 16:09:25,273 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 16:09:25,274 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 16:09:25,275 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 16:09:25,276 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_94-alloc_region_racing.i [2023-08-26 16:09:26,478 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 16:09:26,770 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 16:09:26,771 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_94-alloc_region_racing.i [2023-08-26 16:09:26,791 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e65144c42/703016db960f4fc99c612f3a6ee04d48/FLAG07b175ee0 [2023-08-26 16:09:26,807 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e65144c42/703016db960f4fc99c612f3a6ee04d48 [2023-08-26 16:09:26,811 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 16:09:26,814 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 16:09:26,816 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 16:09:26,816 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 16:09:26,819 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 16:09:26,820 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 04:09:26" (1/1) ... [2023-08-26 16:09:26,820 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c448d40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:09:26, skipping insertion in model container [2023-08-26 16:09:26,820 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 04:09:26" (1/1) ... [2023-08-26 16:09:26,868 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 16:09:27,438 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 16:09:27,461 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 16:09:27,486 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 16:09:27,488 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 16:09:27,501 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [1044] [2023-08-26 16:09:27,514 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 16:09:27,600 INFO L206 MainTranslator]: Completed translation [2023-08-26 16:09:27,601 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:09:27 WrapperNode [2023-08-26 16:09:27,601 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 16:09:27,604 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 16:09:27,604 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 16:09:27,604 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 16:09:27,610 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:09:27" (1/1) ... [2023-08-26 16:09:27,642 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:09:27" (1/1) ... [2023-08-26 16:09:27,681 INFO L138 Inliner]: procedures = 377, calls = 73, calls flagged for inlining = 10, calls inlined = 11, statements flattened = 246 [2023-08-26 16:09:27,682 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 16:09:27,683 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 16:09:27,683 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 16:09:27,683 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 16:09:27,690 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:09:27" (1/1) ... [2023-08-26 16:09:27,690 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:09:27" (1/1) ... [2023-08-26 16:09:27,709 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:09:27" (1/1) ... [2023-08-26 16:09:27,709 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:09:27" (1/1) ... [2023-08-26 16:09:27,718 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:09:27" (1/1) ... [2023-08-26 16:09:27,733 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:09:27" (1/1) ... [2023-08-26 16:09:27,735 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:09:27" (1/1) ... [2023-08-26 16:09:27,736 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:09:27" (1/1) ... [2023-08-26 16:09:27,739 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 16:09:27,740 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 16:09:27,740 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 16:09:27,740 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 16:09:27,741 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:09:27" (1/1) ... [2023-08-26 16:09:27,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 16:09:27,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:09:27,786 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 16:09:27,803 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 16:09:27,822 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 16:09:27,822 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-08-26 16:09:27,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 16:09:27,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-08-26 16:09:27,823 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 16:09:27,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 16:09:27,823 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 16:09:27,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-26 16:09:27,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 16:09:27,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-26 16:09:27,825 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-26 16:09:27,825 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-26 16:09:27,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 16:09:27,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 16:09:27,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 16:09:27,828 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 16:09:27,947 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 16:09:27,949 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 16:09:28,317 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 16:09:28,325 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 16:09:28,325 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-08-26 16:09:28,327 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 04:09:28 BoogieIcfgContainer [2023-08-26 16:09:28,327 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 16:09:28,332 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 16:09:28,332 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 16:09:28,335 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 16:09:28,335 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 04:09:26" (1/3) ... [2023-08-26 16:09:28,336 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9eb0a49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 04:09:28, skipping insertion in model container [2023-08-26 16:09:28,336 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:09:27" (2/3) ... [2023-08-26 16:09:28,336 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9eb0a49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 04:09:28, skipping insertion in model container [2023-08-26 16:09:28,336 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 04:09:28" (3/3) ... [2023-08-26 16:09:28,337 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_94-alloc_region_racing.i [2023-08-26 16:09:28,352 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 16:09:28,353 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 60 error locations. [2023-08-26 16:09:28,353 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 16:09:28,460 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-26 16:09:28,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 280 places, 308 transitions, 624 flow [2023-08-26 16:09:28,680 INFO L124 PetriNetUnfolderBase]: 48/447 cut-off events. [2023-08-26 16:09:28,680 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 16:09:28,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 453 conditions, 447 events. 48/447 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1715 event pairs, 0 based on Foata normal form. 0/305 useless extension candidates. Maximal degree in co-relation 246. Up to 8 conditions per place. [2023-08-26 16:09:28,694 INFO L82 GeneralOperation]: Start removeDead. Operand has 280 places, 308 transitions, 624 flow [2023-08-26 16:09:28,704 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 268 places, 295 transitions, 595 flow [2023-08-26 16:09:28,707 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 16:09:28,721 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 268 places, 295 transitions, 595 flow [2023-08-26 16:09:28,724 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 268 places, 295 transitions, 595 flow [2023-08-26 16:09:28,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 268 places, 295 transitions, 595 flow [2023-08-26 16:09:28,790 INFO L124 PetriNetUnfolderBase]: 47/434 cut-off events. [2023-08-26 16:09:28,790 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 16:09:28,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 439 conditions, 434 events. 47/434 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1643 event pairs, 0 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 246. Up to 8 conditions per place. [2023-08-26 16:09:28,809 INFO L119 LiptonReduction]: Number of co-enabled transitions 29580 [2023-08-26 16:09:40,172 INFO L134 LiptonReduction]: Checked pairs total: 102178 [2023-08-26 16:09:40,172 INFO L136 LiptonReduction]: Total number of compositions: 235 [2023-08-26 16:09:40,184 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 16:09:40,190 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;@1e0c0616, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 16:09:40,190 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 16:09:40,196 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 16:09:40,196 INFO L124 PetriNetUnfolderBase]: 0/22 cut-off events. [2023-08-26 16:09:40,196 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 16:09:40,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:09:40,197 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-26 16:09:40,197 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 16:09:40,201 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:09:40,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1488440130, now seen corresponding path program 1 times [2023-08-26 16:09:40,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:09:40,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658803391] [2023-08-26 16:09:40,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:09:40,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:09:40,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 16:09:40,409 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 16:09:40,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 16:09:40,496 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 16:09:40,498 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 16:09:40,499 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 16:09:40,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 16:09:40,501 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 16:09:40,506 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 16:09:40,506 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 16:09:40,507 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-26 16:09:40,568 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 16:09:40,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 372 places, 412 transitions, 842 flow [2023-08-26 16:09:40,690 INFO L124 PetriNetUnfolderBase]: 81/717 cut-off events. [2023-08-26 16:09:40,690 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 16:09:40,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 731 conditions, 717 events. 81/717 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 3449 event pairs, 0 based on Foata normal form. 0/487 useless extension candidates. Maximal degree in co-relation 449. Up to 12 conditions per place. [2023-08-26 16:09:40,702 INFO L82 GeneralOperation]: Start removeDead. Operand has 372 places, 412 transitions, 842 flow [2023-08-26 16:09:40,707 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 364 places, 404 transitions, 826 flow [2023-08-26 16:09:40,707 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 16:09:40,708 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 364 places, 404 transitions, 826 flow [2023-08-26 16:09:40,708 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 364 places, 404 transitions, 826 flow [2023-08-26 16:09:40,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 364 places, 404 transitions, 826 flow [2023-08-26 16:09:40,807 INFO L124 PetriNetUnfolderBase]: 81/709 cut-off events. [2023-08-26 16:09:40,808 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 16:09:40,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 723 conditions, 709 events. 81/709 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 3428 event pairs, 0 based on Foata normal form. 0/487 useless extension candidates. Maximal degree in co-relation 441. Up to 12 conditions per place. [2023-08-26 16:09:40,852 INFO L119 LiptonReduction]: Number of co-enabled transitions 82212 [2023-08-26 16:09:54,253 INFO L134 LiptonReduction]: Checked pairs total: 294272 [2023-08-26 16:09:54,254 INFO L136 LiptonReduction]: Total number of compositions: 308 [2023-08-26 16:09:54,256 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 16:09:54,257 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;@1e0c0616, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 16:09:54,257 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 16:09:54,264 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 16:09:54,264 INFO L124 PetriNetUnfolderBase]: 0/73 cut-off events. [2023-08-26 16:09:54,264 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 16:09:54,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:09:54,264 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-26 16:09:54,265 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 16:09:54,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:09:54,265 INFO L85 PathProgramCache]: Analyzing trace with hash -477333203, now seen corresponding path program 1 times [2023-08-26 16:09:54,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:09:54,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957449934] [2023-08-26 16:09:54,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:09:54,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:09:54,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 16:09:54,324 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 16:09:54,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 16:09:54,377 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 16:09:54,377 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 16:09:54,378 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 16:09:54,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 16:09:54,378 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 16:09:54,379 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 16:09:54,379 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 16:09:54,379 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-26 16:09:54,444 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-26 16:09:54,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 464 places, 516 transitions, 1062 flow [2023-08-26 16:09:54,629 INFO L124 PetriNetUnfolderBase]: 119/1024 cut-off events. [2023-08-26 16:09:54,629 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 16:09:54,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1052 conditions, 1024 events. 119/1024 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 5502 event pairs, 1 based on Foata normal form. 0/698 useless extension candidates. Maximal degree in co-relation 725. Up to 16 conditions per place. [2023-08-26 16:09:54,656 INFO L82 GeneralOperation]: Start removeDead. Operand has 464 places, 516 transitions, 1062 flow [2023-08-26 16:09:54,666 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 456 places, 508 transitions, 1046 flow [2023-08-26 16:09:54,667 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 16:09:54,667 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 456 places, 508 transitions, 1046 flow [2023-08-26 16:09:54,667 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 456 places, 508 transitions, 1046 flow [2023-08-26 16:09:54,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 456 places, 508 transitions, 1046 flow [2023-08-26 16:09:54,836 INFO L124 PetriNetUnfolderBase]: 119/1016 cut-off events. [2023-08-26 16:09:54,836 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 16:09:54,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1044 conditions, 1016 events. 119/1016 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 5467 event pairs, 1 based on Foata normal form. 0/698 useless extension candidates. Maximal degree in co-relation 717. Up to 16 conditions per place. [2023-08-26 16:09:54,913 INFO L119 LiptonReduction]: Number of co-enabled transitions 155448 [2023-08-26 16:10:09,046 INFO L134 LiptonReduction]: Checked pairs total: 557733 [2023-08-26 16:10:09,046 INFO L136 LiptonReduction]: Total number of compositions: 366 [2023-08-26 16:10:09,048 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 16:10:09,049 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;@1e0c0616, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 16:10:09,049 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 16:10:09,063 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 16:10:09,063 INFO L124 PetriNetUnfolderBase]: 13/163 cut-off events. [2023-08-26 16:10:09,063 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-26 16:10:09,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:10:09,063 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-26 16:10:09,064 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 16:10:09,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:10:09,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1792248469, now seen corresponding path program 1 times [2023-08-26 16:10:09,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:10:09,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826815367] [2023-08-26 16:10:09,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:10:09,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:10:09,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 16:10:09,093 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 16:10:09,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 16:10:09,117 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 16:10:09,117 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 16:10:09,117 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 16:10:09,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 16:10:09,117 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 16:10:09,118 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 16:10:09,118 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 16:10:09,118 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-26 16:10:09,170 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-26 16:10:09,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 556 places, 620 transitions, 1284 flow [2023-08-26 16:10:09,528 INFO L124 PetriNetUnfolderBase]: 169/1407 cut-off events. [2023-08-26 16:10:09,528 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 16:10:09,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1462 conditions, 1407 events. 169/1407 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8144 event pairs, 6 based on Foata normal form. 0/969 useless extension candidates. Maximal degree in co-relation 1044. Up to 32 conditions per place. [2023-08-26 16:10:09,560 INFO L82 GeneralOperation]: Start removeDead. Operand has 556 places, 620 transitions, 1284 flow [2023-08-26 16:10:09,573 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 548 places, 612 transitions, 1268 flow [2023-08-26 16:10:09,573 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 16:10:09,573 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 548 places, 612 transitions, 1268 flow [2023-08-26 16:10:09,574 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 548 places, 612 transitions, 1268 flow [2023-08-26 16:10:09,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 548 places, 612 transitions, 1268 flow [2023-08-26 16:10:09,845 INFO L124 PetriNetUnfolderBase]: 169/1399 cut-off events. [2023-08-26 16:10:09,845 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 16:10:09,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1454 conditions, 1399 events. 169/1399 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8121 event pairs, 6 based on Foata normal form. 0/969 useless extension candidates. Maximal degree in co-relation 1036. Up to 32 conditions per place. [2023-08-26 16:10:09,981 INFO L119 LiptonReduction]: Number of co-enabled transitions 250104 [2023-08-26 16:10:25,450 INFO L134 LiptonReduction]: Checked pairs total: 923218 [2023-08-26 16:10:25,450 INFO L136 LiptonReduction]: Total number of compositions: 467 [2023-08-26 16:10:25,452 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 16:10:25,453 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1e0c0616, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 16:10:25,453 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 16:10:25,477 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 16:10:25,477 INFO L124 PetriNetUnfolderBase]: 40/296 cut-off events. [2023-08-26 16:10:25,477 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-08-26 16:10:25,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:10:25,477 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-26 16:10:25,478 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 16:10:25,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:10:25,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1913047897, now seen corresponding path program 1 times [2023-08-26 16:10:25,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:10:25,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818391619] [2023-08-26 16:10:25,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:10:25,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:10:25,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 16:10:25,525 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 16:10:25,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 16:10:25,569 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 16:10:25,569 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 16:10:25,569 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 16:10:25,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 16:10:25,569 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 16:10:25,570 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 16:10:25,570 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 16:10:25,570 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-26 16:10:25,626 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-26 16:10:25,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 648 places, 724 transitions, 1508 flow [2023-08-26 16:10:26,078 INFO L124 PetriNetUnfolderBase]: 247/1946 cut-off events. [2023-08-26 16:10:26,078 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-26 16:10:26,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2057 conditions, 1946 events. 247/1946 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 12104 event pairs, 23 based on Foata normal form. 0/1364 useless extension candidates. Maximal degree in co-relation 1452. Up to 80 conditions per place. [2023-08-26 16:10:26,132 INFO L82 GeneralOperation]: Start removeDead. Operand has 648 places, 724 transitions, 1508 flow [2023-08-26 16:10:26,153 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 640 places, 716 transitions, 1492 flow [2023-08-26 16:10:26,153 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 16:10:26,154 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 640 places, 716 transitions, 1492 flow [2023-08-26 16:10:26,154 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 640 places, 716 transitions, 1492 flow [2023-08-26 16:10:26,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 640 places, 716 transitions, 1492 flow [2023-08-26 16:10:26,587 INFO L124 PetriNetUnfolderBase]: 247/1938 cut-off events. [2023-08-26 16:10:26,587 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-26 16:10:26,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2049 conditions, 1938 events. 247/1938 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 12120 event pairs, 23 based on Foata normal form. 0/1364 useless extension candidates. Maximal degree in co-relation 1444. Up to 80 conditions per place. [2023-08-26 16:10:26,802 INFO L119 LiptonReduction]: Number of co-enabled transitions 366180 [2023-08-26 16:10:42,657 INFO L134 LiptonReduction]: Checked pairs total: 1510166 [2023-08-26 16:10:42,658 INFO L136 LiptonReduction]: Total number of compositions: 537 [2023-08-26 16:10:42,660 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 16:10:42,660 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;@1e0c0616, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 16:10:42,660 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 16:10:42,700 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 16:10:42,700 INFO L124 PetriNetUnfolderBase]: 63/431 cut-off events. [2023-08-26 16:10:42,700 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2023-08-26 16:10:42,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:10:42,700 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:10:42,700 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 16:10:42,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:10:42,701 INFO L85 PathProgramCache]: Analyzing trace with hash -568913051, now seen corresponding path program 1 times [2023-08-26 16:10:42,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:10:42,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718848631] [2023-08-26 16:10:42,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:10:42,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:10:42,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 16:10:42,748 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 16:10:42,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 16:10:42,785 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 16:10:42,786 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 16:10:42,786 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 16:10:42,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 16:10:42,787 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 16:10:42,787 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 16:10:42,787 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 16:10:42,787 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-26 16:10:42,869 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2023-08-26 16:10:42,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 740 places, 828 transitions, 1734 flow [2023-08-26 16:10:43,768 INFO L124 PetriNetUnfolderBase]: 389/2805 cut-off events. [2023-08-26 16:10:43,769 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-08-26 16:10:43,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3037 conditions, 2805 events. 389/2805 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 18678 event pairs, 72 based on Foata normal form. 0/2015 useless extension candidates. Maximal degree in co-relation 2045. Up to 192 conditions per place. [2023-08-26 16:10:43,855 INFO L82 GeneralOperation]: Start removeDead. Operand has 740 places, 828 transitions, 1734 flow [2023-08-26 16:10:43,883 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 732 places, 820 transitions, 1718 flow [2023-08-26 16:10:43,883 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 16:10:43,883 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 732 places, 820 transitions, 1718 flow [2023-08-26 16:10:43,884 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 732 places, 820 transitions, 1718 flow [2023-08-26 16:10:43,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 732 places, 820 transitions, 1718 flow [2023-08-26 16:10:44,567 INFO L124 PetriNetUnfolderBase]: 389/2797 cut-off events. [2023-08-26 16:10:44,568 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-08-26 16:10:44,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3029 conditions, 2797 events. 389/2797 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 18656 event pairs, 72 based on Foata normal form. 0/2015 useless extension candidates. Maximal degree in co-relation 2037. Up to 192 conditions per place. [2023-08-26 16:10:44,914 INFO L119 LiptonReduction]: Number of co-enabled transitions 503676 [2023-08-26 16:11:03,104 INFO L134 LiptonReduction]: Checked pairs total: 1916117 [2023-08-26 16:11:03,105 INFO L136 LiptonReduction]: Total number of compositions: 615 [2023-08-26 16:11:03,109 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 16:11:03,109 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;@1e0c0616, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 16:11:03,110 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 16:11:03,165 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 16:11:03,165 INFO L124 PetriNetUnfolderBase]: 90/565 cut-off events. [2023-08-26 16:11:03,165 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2023-08-26 16:11:03,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:11:03,166 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:11:03,166 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 16:11:03,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:11:03,166 INFO L85 PathProgramCache]: Analyzing trace with hash 656530572, now seen corresponding path program 1 times [2023-08-26 16:11:03,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:11:03,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140278818] [2023-08-26 16:11:03,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:11:03,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:11:03,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 16:11:03,213 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 16:11:03,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 16:11:03,258 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 16:11:03,260 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 16:11:03,260 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 16:11:03,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 16:11:03,261 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 16:11:03,264 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 16:11:03,265 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 16:11:03,265 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-26 16:11:03,357 INFO L144 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2023-08-26 16:11:03,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 832 places, 932 transitions, 1962 flow [2023-08-26 16:11:04,670 INFO L124 PetriNetUnfolderBase]: 675/4320 cut-off events. [2023-08-26 16:11:04,670 INFO L125 PetriNetUnfolderBase]: For 525/525 co-relation queries the response was YES. [2023-08-26 16:11:04,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4818 conditions, 4320 events. 675/4320 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 31828 event pairs, 201 based on Foata normal form. 0/3194 useless extension candidates. Maximal degree in co-relation 3023. Up to 448 conditions per place. [2023-08-26 16:11:04,783 INFO L82 GeneralOperation]: Start removeDead. Operand has 832 places, 932 transitions, 1962 flow [2023-08-26 16:11:04,823 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 824 places, 924 transitions, 1946 flow [2023-08-26 16:11:04,823 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 16:11:04,823 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 824 places, 924 transitions, 1946 flow [2023-08-26 16:11:04,823 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 824 places, 924 transitions, 1946 flow [2023-08-26 16:11:04,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 824 places, 924 transitions, 1946 flow [2023-08-26 16:11:05,959 INFO L124 PetriNetUnfolderBase]: 675/4312 cut-off events. [2023-08-26 16:11:05,959 INFO L125 PetriNetUnfolderBase]: For 525/525 co-relation queries the response was YES. [2023-08-26 16:11:06,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4810 conditions, 4312 events. 675/4312 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 31875 event pairs, 201 based on Foata normal form. 0/3194 useless extension candidates. Maximal degree in co-relation 3015. Up to 448 conditions per place. [2023-08-26 16:11:06,553 INFO L119 LiptonReduction]: Number of co-enabled transitions 662592 [2023-08-26 16:11:25,284 INFO L134 LiptonReduction]: Checked pairs total: 2517371 [2023-08-26 16:11:25,284 INFO L136 LiptonReduction]: Total number of compositions: 663 [2023-08-26 16:11:25,286 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 16:11:25,286 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;@1e0c0616, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 16:11:25,286 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 16:11:25,366 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 16:11:25,366 INFO L124 PetriNetUnfolderBase]: 106/694 cut-off events. [2023-08-26 16:11:25,366 INFO L125 PetriNetUnfolderBase]: For 87/87 co-relation queries the response was YES. [2023-08-26 16:11:25,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:11:25,366 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:11:25,366 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 16:11:25,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:11:25,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1527349857, now seen corresponding path program 1 times [2023-08-26 16:11:25,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:11:25,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700243987] [2023-08-26 16:11:25,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:11:25,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:11:25,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 16:11:25,398 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 16:11:25,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 16:11:25,426 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 16:11:25,426 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 16:11:25,427 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 16:11:25,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 16:11:25,427 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 16:11:25,427 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 16:11:25,427 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 16:11:25,428 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-08-26 16:11:25,511 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-26 16:11:25,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 924 places, 1036 transitions, 2192 flow [2023-08-26 16:11:28,099 INFO L124 PetriNetUnfolderBase]: 1281/7179 cut-off events. [2023-08-26 16:11:28,100 INFO L125 PetriNetUnfolderBase]: For 1136/1136 co-relation queries the response was YES. [2023-08-26 16:11:28,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8264 conditions, 7179 events. 1281/7179 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 60707 event pairs, 522 based on Foata normal form. 0/5461 useless extension candidates. Maximal degree in co-relation 4802. Up to 1024 conditions per place. [2023-08-26 16:11:28,347 INFO L82 GeneralOperation]: Start removeDead. Operand has 924 places, 1036 transitions, 2192 flow [2023-08-26 16:11:28,444 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 916 places, 1028 transitions, 2176 flow [2023-08-26 16:11:28,444 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 16:11:28,445 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 916 places, 1028 transitions, 2176 flow [2023-08-26 16:11:28,445 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 916 places, 1028 transitions, 2176 flow [2023-08-26 16:11:28,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 916 places, 1028 transitions, 2176 flow [2023-08-26 16:11:30,963 INFO L124 PetriNetUnfolderBase]: 1281/7171 cut-off events. [2023-08-26 16:11:30,963 INFO L125 PetriNetUnfolderBase]: For 1136/1136 co-relation queries the response was YES. [2023-08-26 16:11:31,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8256 conditions, 7171 events. 1281/7171 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 60287 event pairs, 522 based on Foata normal form. 0/5461 useless extension candidates. Maximal degree in co-relation 4794. Up to 1024 conditions per place. [2023-08-26 16:11:31,928 INFO L119 LiptonReduction]: Number of co-enabled transitions 842928 [2023-08-26 16:11:51,904 INFO L134 LiptonReduction]: Checked pairs total: 3204205 [2023-08-26 16:11:51,904 INFO L136 LiptonReduction]: Total number of compositions: 751 [2023-08-26 16:11:51,905 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 16:11:51,906 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;@1e0c0616, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 16:11:51,906 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 16:11:52,019 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 16:11:52,019 INFO L124 PetriNetUnfolderBase]: 143/845 cut-off events. [2023-08-26 16:11:52,019 INFO L125 PetriNetUnfolderBase]: For 127/127 co-relation queries the response was YES. [2023-08-26 16:11:52,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:11:52,019 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:11:52,019 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 16:11:52,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:11:52,020 INFO L85 PathProgramCache]: Analyzing trace with hash -727549988, now seen corresponding path program 1 times [2023-08-26 16:11:52,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:11:52,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358923919] [2023-08-26 16:11:52,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:11:52,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:11:52,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 16:11:52,077 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 16:11:52,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 16:11:52,119 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 16:11:52,119 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 16:11:52,119 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 16:11:52,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 16:11:52,120 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 16:11:52,121 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 16:11:52,121 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 16:11:52,121 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-08-26 16:11:52,221 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-26 16:11:52,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1016 places, 1140 transitions, 2424 flow [2023-08-26 16:11:57,067 INFO L124 PetriNetUnfolderBase]: 2591/12790 cut-off events. [2023-08-26 16:11:57,067 INFO L125 PetriNetUnfolderBase]: For 2460/2460 co-relation queries the response was YES. [2023-08-26 16:11:57,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15167 conditions, 12790 events. 2591/12790 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 121830 event pairs, 1291 based on Foata normal form. 0/9968 useless extension candidates. Maximal degree in co-relation 8246. Up to 2304 conditions per place. [2023-08-26 16:11:57,573 INFO L82 GeneralOperation]: Start removeDead. Operand has 1016 places, 1140 transitions, 2424 flow [2023-08-26 16:11:57,896 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1008 places, 1132 transitions, 2408 flow [2023-08-26 16:11:57,896 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 16:11:57,897 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1008 places, 1132 transitions, 2408 flow [2023-08-26 16:11:57,897 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1008 places, 1132 transitions, 2408 flow [2023-08-26 16:11:57,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1008 places, 1132 transitions, 2408 flow [2023-08-26 16:12:03,019 INFO L124 PetriNetUnfolderBase]: 2591/12782 cut-off events. [2023-08-26 16:12:03,019 INFO L125 PetriNetUnfolderBase]: For 2460/2460 co-relation queries the response was YES. [2023-08-26 16:12:03,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15159 conditions, 12782 events. 2591/12782 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 121912 event pairs, 1291 based on Foata normal form. 0/9968 useless extension candidates. Maximal degree in co-relation 8238. Up to 2304 conditions per place. [2023-08-26 16:12:04,871 INFO L119 LiptonReduction]: Number of co-enabled transitions 1044684 [2023-08-26 16:12:25,528 INFO L134 LiptonReduction]: Checked pairs total: 4018873 [2023-08-26 16:12:25,528 INFO L136 LiptonReduction]: Total number of compositions: 810 [2023-08-26 16:12:25,531 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 16:12:25,533 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;@1e0c0616, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 16:12:25,533 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 16:12:25,643 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 16:12:25,643 INFO L124 PetriNetUnfolderBase]: 170/1003 cut-off events. [2023-08-26 16:12:25,644 INFO L125 PetriNetUnfolderBase]: For 180/180 co-relation queries the response was YES. [2023-08-26 16:12:25,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:12:25,644 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:12:25,644 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 16:12:25,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:12:25,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1075119093, now seen corresponding path program 1 times [2023-08-26 16:12:25,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:12:25,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109895613] [2023-08-26 16:12:25,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:12:25,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:12:25,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 16:12:25,683 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 16:12:25,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 16:12:25,713 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 16:12:25,713 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 16:12:25,714 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 16:12:25,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 16:12:25,714 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 16:12:25,714 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 16:12:25,714 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 16:12:25,714 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-08-26 16:12:25,813 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2023-08-26 16:12:25,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1108 places, 1244 transitions, 2658 flow [2023-08-26 16:12:36,421 INFO L124 PetriNetUnfolderBase]: 5437/24033 cut-off events. [2023-08-26 16:12:36,422 INFO L125 PetriNetUnfolderBase]: For 5330/5330 co-relation queries the response was YES. [2023-08-26 16:12:37,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29239 conditions, 24033 events. 5437/24033 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 260648 event pairs, 3084 based on Foata normal form. 0/19083 useless extension candidates. Maximal degree in co-relation 15147. Up to 5120 conditions per place. [2023-08-26 16:12:37,646 INFO L82 GeneralOperation]: Start removeDead. Operand has 1108 places, 1244 transitions, 2658 flow [2023-08-26 16:12:38,419 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1100 places, 1236 transitions, 2642 flow [2023-08-26 16:12:38,420 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 16:12:38,420 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1100 places, 1236 transitions, 2642 flow [2023-08-26 16:12:38,420 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1100 places, 1236 transitions, 2642 flow [2023-08-26 16:12:38,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1100 places, 1236 transitions, 2642 flow [2023-08-26 16:12:49,629 INFO L124 PetriNetUnfolderBase]: 5437/24025 cut-off events. [2023-08-26 16:12:49,630 INFO L125 PetriNetUnfolderBase]: For 5330/5330 co-relation queries the response was YES. [2023-08-26 16:12:50,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29231 conditions, 24025 events. 5437/24025 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 260517 event pairs, 3084 based on Foata normal form. 0/19083 useless extension candidates. Maximal degree in co-relation 15139. Up to 5120 conditions per place. [2023-08-26 16:12:53,694 INFO L119 LiptonReduction]: Number of co-enabled transitions 1267860 [2023-08-26 16:13:15,230 INFO L134 LiptonReduction]: Checked pairs total: 4846284 [2023-08-26 16:13:15,230 INFO L136 LiptonReduction]: Total number of compositions: 895 [2023-08-26 16:13:15,232 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 16:13:15,232 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;@1e0c0616, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 16:13:15,232 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 16:13:15,426 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 16:13:15,426 INFO L124 PetriNetUnfolderBase]: 202/1165 cut-off events. [2023-08-26 16:13:15,426 INFO L125 PetriNetUnfolderBase]: For 246/246 co-relation queries the response was YES. [2023-08-26 16:13:15,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:13:15,426 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:13:15,427 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 16:13:15,427 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:13:15,427 INFO L85 PathProgramCache]: Analyzing trace with hash 707817198, now seen corresponding path program 1 times [2023-08-26 16:13:15,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:13:15,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024288962] [2023-08-26 16:13:15,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:13:15,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:13:15,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 16:13:15,508 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 16:13:15,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 16:13:15,548 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 16:13:15,548 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 16:13:15,548 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 16:13:15,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 16:13:15,549 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 16:13:15,549 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 16:13:15,549 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 16:13:15,550 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-08-26 16:13:15,656 INFO L144 ThreadInstanceAdder]: Constructed 11 joinOtherThreadTransitions. [2023-08-26 16:13:15,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1200 places, 1348 transitions, 2894 flow [2023-08-26 16:13:41,719 INFO L124 PetriNetUnfolderBase]: 11611/46796 cut-off events. [2023-08-26 16:13:41,719 INFO L125 PetriNetUnfolderBase]: For 11539/11539 co-relation queries the response was YES. [2023-08-26 16:13:44,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58160 conditions, 46796 events. 11611/46796 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 1133. Compared 563807 event pairs, 7181 based on Foata normal form. 0/37670 useless extension candidates. Maximal degree in co-relation 29217. Up to 11264 conditions per place. [2023-08-26 16:13:44,862 INFO L82 GeneralOperation]: Start removeDead. Operand has 1200 places, 1348 transitions, 2894 flow [2023-08-26 16:13:46,194 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1192 places, 1340 transitions, 2878 flow [2023-08-26 16:13:46,194 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 16:13:46,194 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1192 places, 1340 transitions, 2878 flow [2023-08-26 16:13:46,195 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1192 places, 1340 transitions, 2878 flow [2023-08-26 16:13:46,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1192 places, 1340 transitions, 2878 flow [2023-08-26 16:14:09,351 INFO L124 PetriNetUnfolderBase]: 11611/46788 cut-off events. [2023-08-26 16:14:09,352 INFO L125 PetriNetUnfolderBase]: For 11539/11539 co-relation queries the response was YES. [2023-08-26 16:14:12,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58152 conditions, 46788 events. 11611/46788 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 1133. Compared 564450 event pairs, 7181 based on Foata normal form. 0/37670 useless extension candidates. Maximal degree in co-relation 29209. Up to 11264 conditions per place. [2023-08-26 16:14:19,041 INFO L119 LiptonReduction]: Number of co-enabled transitions 1512456 [2023-08-26 16:14:42,951 INFO L134 LiptonReduction]: Checked pairs total: 5138475 [2023-08-26 16:14:42,951 INFO L136 LiptonReduction]: Total number of compositions: 963 [2023-08-26 16:14:42,953 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 16:14:42,953 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;@1e0c0616, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 16:14:42,953 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 16:14:43,133 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 16:14:43,133 INFO L124 PetriNetUnfolderBase]: 221/1314 cut-off events. [2023-08-26 16:14:43,133 INFO L125 PetriNetUnfolderBase]: For 325/325 co-relation queries the response was YES. [2023-08-26 16:14:43,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:14:43,133 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:14:43,133 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 16:14:43,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:14:43,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1166635961, now seen corresponding path program 1 times [2023-08-26 16:14:43,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:14:43,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932753703] [2023-08-26 16:14:43,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:14:43,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:14:43,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 16:14:43,177 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 16:14:43,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 16:14:43,214 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 16:14:43,214 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 16:14:43,214 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 16:14:43,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 16:14:43,214 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 16:14:43,215 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 16:14:43,215 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 16:14:43,215 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-08-26 16:14:43,313 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2023-08-26 16:14:43,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1292 places, 1452 transitions, 3132 flow [2023-08-26 16:15:36,908 INFO L124 PetriNetUnfolderBase]: 24953/93111 cut-off events. [2023-08-26 16:15:36,909 INFO L125 PetriNetUnfolderBase]: For 24928/24928 co-relation queries the response was YES. [2023-08-26 16:15:49,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117802 conditions, 93111 events. 24953/93111 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 2186. Compared 1223443 event pairs, 16398 based on Foata normal form. 0/75713 useless extension candidates. Maximal degree in co-relation 58136. Up to 24576 conditions per place. [2023-08-26 16:15:49,300 INFO L82 GeneralOperation]: Start removeDead. Operand has 1292 places, 1452 transitions, 3132 flow [2023-08-26 16:15:52,812 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1284 places, 1444 transitions, 3116 flow [2023-08-26 16:15:52,813 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 16:15:52,813 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1284 places, 1444 transitions, 3116 flow [2023-08-26 16:15:52,813 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1284 places, 1444 transitions, 3116 flow [2023-08-26 16:15:52,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1284 places, 1444 transitions, 3116 flow [2023-08-26 16:16:47,209 INFO L124 PetriNetUnfolderBase]: 24953/93103 cut-off events. [2023-08-26 16:16:47,210 INFO L125 PetriNetUnfolderBase]: For 24928/24928 co-relation queries the response was YES. [2023-08-26 16:17:01,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117794 conditions, 93103 events. 24953/93103 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 2186. Compared 1222860 event pairs, 16398 based on Foata normal form. 0/75713 useless extension candidates. Maximal degree in co-relation 58128. Up to 24576 conditions per place. [2023-08-26 16:17:21,156 INFO L119 LiptonReduction]: Number of co-enabled transitions 1778472 [2023-08-26 16:17:46,680 INFO L134 LiptonReduction]: Checked pairs total: 6874157 [2023-08-26 16:17:46,680 INFO L136 LiptonReduction]: Total number of compositions: 1062 [2023-08-26 16:17:46,682 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 16:17:46,682 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;@1e0c0616, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 16:17:46,682 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 16:17:46,903 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 16:17:46,904 INFO L124 PetriNetUnfolderBase]: 280/1530 cut-off events. [2023-08-26 16:17:46,904 INFO L125 PetriNetUnfolderBase]: For 447/447 co-relation queries the response was YES. [2023-08-26 16:17:46,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:17:46,904 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 16:17:46,904 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 16:17:46,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:17:46,904 INFO L85 PathProgramCache]: Analyzing trace with hash 69758519, now seen corresponding path program 1 times [2023-08-26 16:17:46,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:17:46,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858621900] [2023-08-26 16:17:46,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:17:46,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:17:46,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 16:17:46,946 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 16:17:46,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 16:17:46,988 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 16:17:46,988 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 16:17:46,988 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 16:17:46,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 16:17:46,989 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 16:17:46,989 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 16:17:46,989 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 16:17:46,989 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-08-26 16:17:47,122 INFO L144 ThreadInstanceAdder]: Constructed 13 joinOtherThreadTransitions. [2023-08-26 16:17:47,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1384 places, 1556 transitions, 3372 flow