/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_10-ptrmunge_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 15:41:27,885 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 15:41:27,929 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-26 15:41:27,941 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 15:41:27,941 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 15:41:27,981 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 15:41:27,982 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 15:41:27,982 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 15:41:27,983 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 15:41:27,987 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 15:41:27,988 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 15:41:27,988 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 15:41:27,988 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 15:41:27,989 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 15:41:27,990 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 15:41:27,990 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 15:41:27,990 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 15:41:27,990 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 15:41:27,991 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 15:41:27,991 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 15:41:27,991 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 15:41:27,991 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 15:41:27,992 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 15:41:27,992 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 15:41:27,993 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 15:41:27,993 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 15:41:27,993 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 15:41:27,993 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:41:27,993 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 15:41:27,994 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 15:41:27,995 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 15:41:27,995 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 15:41:27,995 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 15:41:27,995 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 15:41:27,996 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 15:41:27,996 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 15:41:28,328 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 15:41:28,346 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 15:41:28,348 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 15:41:28,349 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 15:41:28,350 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 15:41:28,351 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_10-ptrmunge_racefree.i [2023-08-26 15:41:29,569 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 15:41:29,859 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 15:41:29,860 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_10-ptrmunge_racefree.i [2023-08-26 15:41:29,878 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/623a88ebc/efd8ff7f8f9f4278b3f47ead32155a0e/FLAGe3110d54c [2023-08-26 15:41:29,890 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/623a88ebc/efd8ff7f8f9f4278b3f47ead32155a0e [2023-08-26 15:41:29,892 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 15:41:29,893 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 15:41:29,894 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 15:41:29,894 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 15:41:29,896 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 15:41:29,897 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:41:29" (1/1) ... [2023-08-26 15:41:29,898 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@380d767c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:41:29, skipping insertion in model container [2023-08-26 15:41:29,898 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:41:29" (1/1) ... [2023-08-26 15:41:29,932 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 15:41:30,175 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:41:30,186 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 15:41:30,201 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 15:41:30,202 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 15:41:30,221 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:41:30,253 INFO L206 MainTranslator]: Completed translation [2023-08-26 15:41:30,253 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:41:30 WrapperNode [2023-08-26 15:41:30,253 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 15:41:30,254 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 15:41:30,254 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 15:41:30,255 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 15:41:30,260 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:41:30" (1/1) ... [2023-08-26 15:41:30,272 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:41:30" (1/1) ... [2023-08-26 15:41:30,294 INFO L138 Inliner]: procedures = 172, calls = 53, calls flagged for inlining = 6, calls inlined = 8, statements flattened = 230 [2023-08-26 15:41:30,295 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 15:41:30,295 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 15:41:30,295 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 15:41:30,295 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 15:41:30,302 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:41:30" (1/1) ... [2023-08-26 15:41:30,302 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:41:30" (1/1) ... [2023-08-26 15:41:30,306 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:41:30" (1/1) ... [2023-08-26 15:41:30,306 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:41:30" (1/1) ... [2023-08-26 15:41:30,312 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:41:30" (1/1) ... [2023-08-26 15:41:30,317 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:41:30" (1/1) ... [2023-08-26 15:41:30,319 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:41:30" (1/1) ... [2023-08-26 15:41:30,320 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:41:30" (1/1) ... [2023-08-26 15:41:30,323 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 15:41:30,324 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 15:41:30,324 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 15:41:30,324 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 15:41:30,325 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:41:30" (1/1) ... [2023-08-26 15:41:30,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:41:30,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:41:30,351 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-26 15:41:30,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-26 15:41:30,395 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 15:41:30,395 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-08-26 15:41:30,396 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-08-26 15:41:30,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 15:41:30,396 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 15:41:30,396 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 15:41:30,396 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 15:41:30,396 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-08-26 15:41:30,397 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-08-26 15:41:30,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 15:41:30,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 15:41:30,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 15:41:30,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 15:41:30,399 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-26 15:41:30,557 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 15:41:30,566 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 15:41:30,976 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 15:41:30,984 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 15:41:30,985 INFO L302 CfgBuilder]: Removed 24 assume(true) statements. [2023-08-26 15:41:30,987 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:41:30 BoogieIcfgContainer [2023-08-26 15:41:30,987 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 15:41:30,989 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 15:41:30,989 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 15:41:30,992 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 15:41:30,992 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 03:41:29" (1/3) ... [2023-08-26 15:41:30,997 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@795734a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:41:30, skipping insertion in model container [2023-08-26 15:41:30,997 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:41:30" (2/3) ... [2023-08-26 15:41:30,997 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@795734a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:41:30, skipping insertion in model container [2023-08-26 15:41:30,998 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:41:30" (3/3) ... [2023-08-26 15:41:30,999 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_10-ptrmunge_racefree.i [2023-08-26 15:41:31,017 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 15:41:31,017 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2023-08-26 15:41:31,017 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 15:41:31,144 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-26 15:41:31,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 228 places, 257 transitions, 536 flow [2023-08-26 15:41:31,318 INFO L124 PetriNetUnfolderBase]: 61/466 cut-off events. [2023-08-26 15:41:31,319 INFO L125 PetriNetUnfolderBase]: For 8/10 co-relation queries the response was YES. [2023-08-26 15:41:31,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 486 conditions, 466 events. 61/466 cut-off events. For 8/10 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2281 event pairs, 0 based on Foata normal form. 0/338 useless extension candidates. Maximal degree in co-relation 252. Up to 8 conditions per place. [2023-08-26 15:41:31,329 INFO L82 GeneralOperation]: Start removeDead. Operand has 228 places, 257 transitions, 536 flow [2023-08-26 15:41:31,335 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 228 places, 257 transitions, 536 flow [2023-08-26 15:41:31,338 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:41:31,346 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 228 places, 257 transitions, 536 flow [2023-08-26 15:41:31,348 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 228 places, 257 transitions, 536 flow [2023-08-26 15:41:31,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 228 places, 257 transitions, 536 flow [2023-08-26 15:41:31,409 INFO L124 PetriNetUnfolderBase]: 61/466 cut-off events. [2023-08-26 15:41:31,409 INFO L125 PetriNetUnfolderBase]: For 8/10 co-relation queries the response was YES. [2023-08-26 15:41:31,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 486 conditions, 466 events. 61/466 cut-off events. For 8/10 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2281 event pairs, 0 based on Foata normal form. 0/338 useless extension candidates. Maximal degree in co-relation 252. Up to 8 conditions per place. [2023-08-26 15:41:31,428 INFO L119 LiptonReduction]: Number of co-enabled transitions 28350 [2023-08-26 15:41:37,037 INFO L134 LiptonReduction]: Checked pairs total: 65952 [2023-08-26 15:41:37,037 INFO L136 LiptonReduction]: Total number of compositions: 218 [2023-08-26 15:41:37,049 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:41:37,055 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;@598e3016, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:41:37,055 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-26 15:41:37,062 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:41:37,062 INFO L124 PetriNetUnfolderBase]: 1/31 cut-off events. [2023-08-26 15:41:37,062 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:41:37,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:41:37,063 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-26 15:41:37,063 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:41:37,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:41:37,068 INFO L85 PathProgramCache]: Analyzing trace with hash 848831418, now seen corresponding path program 1 times [2023-08-26 15:41:37,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:41:37,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911377948] [2023-08-26 15:41:37,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:41:37,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:41:37,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:41:37,216 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:41:37,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:41:37,300 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:41:37,301 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:41:37,303 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-26 15:41:37,305 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-26 15:41:37,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 15:41:37,306 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:41:37,316 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-26 15:41:37,317 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:41:37,317 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-26 15:41:37,389 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-26 15:41:37,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 358 places, 413 transitions, 874 flow [2023-08-26 15:41:37,648 INFO L124 PetriNetUnfolderBase]: 205/1349 cut-off events. [2023-08-26 15:41:37,648 INFO L125 PetriNetUnfolderBase]: For 72/78 co-relation queries the response was YES. [2023-08-26 15:41:37,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1446 conditions, 1349 events. 205/1349 cut-off events. For 72/78 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 8982 event pairs, 2 based on Foata normal form. 0/981 useless extension candidates. Maximal degree in co-relation 822. Up to 32 conditions per place. [2023-08-26 15:41:37,683 INFO L82 GeneralOperation]: Start removeDead. Operand has 358 places, 413 transitions, 874 flow [2023-08-26 15:41:37,700 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 358 places, 413 transitions, 874 flow [2023-08-26 15:41:37,700 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:41:37,701 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 358 places, 413 transitions, 874 flow [2023-08-26 15:41:37,701 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 358 places, 413 transitions, 874 flow [2023-08-26 15:41:37,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 358 places, 413 transitions, 874 flow [2023-08-26 15:41:38,001 INFO L124 PetriNetUnfolderBase]: 205/1349 cut-off events. [2023-08-26 15:41:38,001 INFO L125 PetriNetUnfolderBase]: For 72/78 co-relation queries the response was YES. [2023-08-26 15:41:38,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1446 conditions, 1349 events. 205/1349 cut-off events. For 72/78 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 8982 event pairs, 2 based on Foata normal form. 0/981 useless extension candidates. Maximal degree in co-relation 822. Up to 32 conditions per place. [2023-08-26 15:41:38,102 INFO L119 LiptonReduction]: Number of co-enabled transitions 104700 [2023-08-26 15:41:45,051 INFO L134 LiptonReduction]: Checked pairs total: 284603 [2023-08-26 15:41:45,051 INFO L136 LiptonReduction]: Total number of compositions: 340 [2023-08-26 15:41:45,053 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:41:45,054 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;@598e3016, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:41:45,054 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-26 15:41:45,067 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:41:45,067 INFO L124 PetriNetUnfolderBase]: 31/166 cut-off events. [2023-08-26 15:41:45,067 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-26 15:41:45,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:41:45,067 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-26 15:41:45,068 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:41:45,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:41:45,068 INFO L85 PathProgramCache]: Analyzing trace with hash -2128258263, now seen corresponding path program 1 times [2023-08-26 15:41:45,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:41:45,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634440200] [2023-08-26 15:41:45,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:41:45,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:41:45,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:41:45,117 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:41:45,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:41:45,158 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:41:45,158 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:41:45,159 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-26 15:41:45,159 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-26 15:41:45,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 15:41:45,159 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:41:45,160 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-26 15:41:45,160 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:41:45,160 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-26 15:41:45,232 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2023-08-26 15:41:45,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 488 places, 569 transitions, 1216 flow [2023-08-26 15:41:46,323 INFO L124 PetriNetUnfolderBase]: 679/3758 cut-off events. [2023-08-26 15:41:46,323 INFO L125 PetriNetUnfolderBase]: For 419/431 co-relation queries the response was YES. [2023-08-26 15:41:46,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4209 conditions, 3758 events. 679/3758 cut-off events. For 419/431 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 30018 event pairs, 52 based on Foata normal form. 0/2806 useless extension candidates. Maximal degree in co-relation 2398. Up to 192 conditions per place. [2023-08-26 15:41:46,390 INFO L82 GeneralOperation]: Start removeDead. Operand has 488 places, 569 transitions, 1216 flow [2023-08-26 15:41:46,444 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 488 places, 569 transitions, 1216 flow [2023-08-26 15:41:46,444 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:41:46,445 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 488 places, 569 transitions, 1216 flow [2023-08-26 15:41:46,445 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 488 places, 569 transitions, 1216 flow [2023-08-26 15:41:46,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 488 places, 569 transitions, 1216 flow [2023-08-26 15:41:47,317 INFO L124 PetriNetUnfolderBase]: 679/3758 cut-off events. [2023-08-26 15:41:47,317 INFO L125 PetriNetUnfolderBase]: For 419/431 co-relation queries the response was YES. [2023-08-26 15:41:47,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4209 conditions, 3758 events. 679/3758 cut-off events. For 419/431 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 30018 event pairs, 52 based on Foata normal form. 0/2806 useless extension candidates. Maximal degree in co-relation 2398. Up to 192 conditions per place. [2023-08-26 15:41:47,772 INFO L119 LiptonReduction]: Number of co-enabled transitions 229050 [2023-08-26 15:41:55,878 INFO L134 LiptonReduction]: Checked pairs total: 642399 [2023-08-26 15:41:55,879 INFO L136 LiptonReduction]: Total number of compositions: 472 [2023-08-26 15:41:55,881 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:41:55,881 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;@598e3016, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:41:55,882 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-26 15:41:55,905 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:41:55,905 INFO L124 PetriNetUnfolderBase]: 87/400 cut-off events. [2023-08-26 15:41:55,905 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2023-08-26 15:41:55,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:41:55,905 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-26 15:41:55,905 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:41:55,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:41:55,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1980282615, now seen corresponding path program 1 times [2023-08-26 15:41:55,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:41:55,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023379581] [2023-08-26 15:41:55,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:41:55,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:41:55,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:41:55,951 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:41:55,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:41:55,991 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:41:55,991 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:41:55,994 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-26 15:41:55,994 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-26 15:41:55,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 15:41:55,994 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:41:55,995 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-26 15:41:55,995 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:41:55,995 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-26 15:41:56,065 INFO L144 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2023-08-26 15:41:56,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 618 places, 725 transitions, 1562 flow [2023-08-26 15:42:00,270 INFO L124 PetriNetUnfolderBase]: 2671/12013 cut-off events. [2023-08-26 15:42:00,271 INFO L125 PetriNetUnfolderBase]: For 2144/2164 co-relation queries the response was YES. [2023-08-26 15:42:00,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14178 conditions, 12013 events. 2671/12013 cut-off events. For 2144/2164 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 116591 event pairs, 540 based on Foata normal form. 0/9269 useless extension candidates. Maximal degree in co-relation 7530. Up to 1024 conditions per place. [2023-08-26 15:42:00,601 INFO L82 GeneralOperation]: Start removeDead. Operand has 618 places, 725 transitions, 1562 flow [2023-08-26 15:42:00,933 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 618 places, 725 transitions, 1562 flow [2023-08-26 15:42:00,933 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:42:00,933 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 618 places, 725 transitions, 1562 flow [2023-08-26 15:42:00,933 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 618 places, 725 transitions, 1562 flow [2023-08-26 15:42:00,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 618 places, 725 transitions, 1562 flow [2023-08-26 15:42:04,480 INFO L124 PetriNetUnfolderBase]: 2671/12013 cut-off events. [2023-08-26 15:42:04,480 INFO L125 PetriNetUnfolderBase]: For 2144/2164 co-relation queries the response was YES. [2023-08-26 15:42:04,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14178 conditions, 12013 events. 2671/12013 cut-off events. For 2144/2164 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 116591 event pairs, 540 based on Foata normal form. 0/9269 useless extension candidates. Maximal degree in co-relation 7530. Up to 1024 conditions per place. [2023-08-26 15:42:05,766 INFO L119 LiptonReduction]: Number of co-enabled transitions 401400 [2023-08-26 15:42:15,242 INFO L134 LiptonReduction]: Checked pairs total: 1165717 [2023-08-26 15:42:15,243 INFO L136 LiptonReduction]: Total number of compositions: 601 [2023-08-26 15:42:15,244 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:42:15,245 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;@598e3016, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:42:15,245 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-26 15:42:15,285 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:42:15,285 INFO L124 PetriNetUnfolderBase]: 157/702 cut-off events. [2023-08-26 15:42:15,285 INFO L125 PetriNetUnfolderBase]: For 91/91 co-relation queries the response was YES. [2023-08-26 15:42:15,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:42:15,285 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-26 15:42:15,286 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:42:15,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:42:15,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1689324828, now seen corresponding path program 1 times [2023-08-26 15:42:15,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:42:15,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826204462] [2023-08-26 15:42:15,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:42:15,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:42:15,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:42:15,340 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:42:15,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:42:15,367 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:42:15,368 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:42:15,368 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-26 15:42:15,368 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-26 15:42:15,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 15:42:15,368 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:42:15,369 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-26 15:42:15,369 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:42:15,369 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-26 15:42:15,441 INFO L144 ThreadInstanceAdder]: Constructed 20 joinOtherThreadTransitions. [2023-08-26 15:42:15,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 748 places, 881 transitions, 1912 flow [2023-08-26 15:42:33,440 INFO L124 PetriNetUnfolderBase]: 11797/44258 cut-off events. [2023-08-26 15:42:33,440 INFO L125 PetriNetUnfolderBase]: For 10450/10480 co-relation queries the response was YES. [2023-08-26 15:42:36,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54684 conditions, 44258 events. 11797/44258 cut-off events. For 10450/10480 co-relation queries the response was YES. Maximal size of possible extension queue 687. Compared 516887 event pairs, 3676 based on Foata normal form. 0/35058 useless extension candidates. Maximal degree in co-relation 27454. Up to 5120 conditions per place. [2023-08-26 15:42:36,626 INFO L82 GeneralOperation]: Start removeDead. Operand has 748 places, 881 transitions, 1912 flow [2023-08-26 15:42:37,734 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 748 places, 881 transitions, 1912 flow [2023-08-26 15:42:37,735 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:42:37,735 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 748 places, 881 transitions, 1912 flow [2023-08-26 15:42:37,735 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 748 places, 881 transitions, 1912 flow [2023-08-26 15:42:37,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 748 places, 881 transitions, 1912 flow [2023-08-26 15:42:55,398 INFO L124 PetriNetUnfolderBase]: 11797/44258 cut-off events. [2023-08-26 15:42:55,399 INFO L125 PetriNetUnfolderBase]: For 10450/10480 co-relation queries the response was YES. [2023-08-26 15:42:58,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54684 conditions, 44258 events. 11797/44258 cut-off events. For 10450/10480 co-relation queries the response was YES. Maximal size of possible extension queue 687. Compared 516887 event pairs, 3676 based on Foata normal form. 0/35058 useless extension candidates. Maximal degree in co-relation 27454. Up to 5120 conditions per place. [2023-08-26 15:43:03,562 INFO L119 LiptonReduction]: Number of co-enabled transitions 621750 [2023-08-26 15:43:14,285 INFO L134 LiptonReduction]: Checked pairs total: 1825268 [2023-08-26 15:43:14,285 INFO L136 LiptonReduction]: Total number of compositions: 717 [2023-08-26 15:43:14,287 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:43:14,287 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;@598e3016, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:43:14,288 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-26 15:43:14,376 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:43:14,377 INFO L124 PetriNetUnfolderBase]: 248/1127 cut-off events. [2023-08-26 15:43:14,377 INFO L125 PetriNetUnfolderBase]: For 203/203 co-relation queries the response was YES. [2023-08-26 15:43:14,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:43:14,377 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:43:14,377 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:43:14,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:43:14,378 INFO L85 PathProgramCache]: Analyzing trace with hash -378217076, now seen corresponding path program 1 times [2023-08-26 15:43:14,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:43:14,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573752715] [2023-08-26 15:43:14,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:43:14,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:43:14,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:43:14,436 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:43:14,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:43:14,459 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:43:14,459 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:43:14,459 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-26 15:43:14,459 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-26 15:43:14,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 15:43:14,460 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:43:14,460 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-26 15:43:14,460 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:43:14,460 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-26 15:43:14,551 INFO L144 ThreadInstanceAdder]: Constructed 24 joinOtherThreadTransitions. [2023-08-26 15:43:14,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 878 places, 1037 transitions, 2266 flow [2023-08-26 15:44:54,567 INFO L124 PetriNetUnfolderBase]: 53977/176525 cut-off events. [2023-08-26 15:44:54,569 INFO L125 PetriNetUnfolderBase]: For 49552/49594 co-relation queries the response was YES. [2023-08-26 15:45:15,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225954 conditions, 176525 events. 53977/176525 cut-off events. For 49552/49594 co-relation queries the response was YES. Maximal size of possible extension queue 2572. Compared 2425379 event pairs, 24930 based on Foata normal form. 0/142381 useless extension candidates. Maximal degree in co-relation 110557. Up to 24576 conditions per place. [2023-08-26 15:45:15,684 INFO L82 GeneralOperation]: Start removeDead. Operand has 878 places, 1037 transitions, 2266 flow [2023-08-26 15:45:26,969 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 878 places, 1037 transitions, 2266 flow [2023-08-26 15:45:26,970 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:45:26,970 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 878 places, 1037 transitions, 2266 flow [2023-08-26 15:45:26,970 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 878 places, 1037 transitions, 2266 flow [2023-08-26 15:45:26,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 878 places, 1037 transitions, 2266 flow