/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_42-trylock2_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 15:54:53,142 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 15:54:53,229 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 15:54:53,233 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 15:54:53,234 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 15:54:53,265 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 15:54:53,266 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 15:54:53,266 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 15:54:53,267 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 15:54:53,271 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 15:54:53,271 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 15:54:53,271 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 15:54:53,272 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 15:54:53,273 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 15:54:53,273 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 15:54:53,273 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 15:54:53,273 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 15:54:53,274 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 15:54:53,274 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 15:54:53,274 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 15:54:53,274 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 15:54:53,275 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 15:54:53,275 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 15:54:53,276 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 15:54:53,276 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 15:54:53,276 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 15:54:53,277 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 15:54:53,277 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:54:53,277 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 15:54:53,278 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 15:54:53,278 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 15:54:53,279 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 15:54:53,279 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 15:54:53,279 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 15:54:53,279 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 15:54:53,279 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 15:54:53,582 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 15:54:53,604 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 15:54:53,607 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 15:54:53,608 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 15:54:53,608 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 15:54:53,614 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_42-trylock2_racefree.i [2023-08-26 15:54:54,858 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 15:54:55,162 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 15:54:55,162 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_42-trylock2_racefree.i [2023-08-26 15:54:55,184 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77625c7ce/74bdf321e67e4cb78e39ae822df49382/FLAG7787ad077 [2023-08-26 15:54:55,199 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77625c7ce/74bdf321e67e4cb78e39ae822df49382 [2023-08-26 15:54:55,203 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 15:54:55,204 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 15:54:55,206 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 15:54:55,206 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 15:54:55,209 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 15:54:55,210 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:54:55" (1/1) ... [2023-08-26 15:54:55,210 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4920aca9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:54:55, skipping insertion in model container [2023-08-26 15:54:55,211 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:54:55" (1/1) ... [2023-08-26 15:54:55,259 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 15:54:55,552 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:54:55,562 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 15:54:55,583 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 15:54:55,585 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 15:54:55,618 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:54:55,652 INFO L206 MainTranslator]: Completed translation [2023-08-26 15:54:55,652 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:54:55 WrapperNode [2023-08-26 15:54:55,653 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 15:54:55,653 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 15:54:55,653 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 15:54:55,653 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 15:54:55,659 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:54:55" (1/1) ... [2023-08-26 15:54:55,670 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:54:55" (1/1) ... [2023-08-26 15:54:55,691 INFO L138 Inliner]: procedures = 171, calls = 48, calls flagged for inlining = 7, calls inlined = 10, statements flattened = 144 [2023-08-26 15:54:55,691 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 15:54:55,692 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 15:54:55,692 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 15:54:55,692 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 15:54:55,699 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:54:55" (1/1) ... [2023-08-26 15:54:55,700 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:54:55" (1/1) ... [2023-08-26 15:54:55,703 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:54:55" (1/1) ... [2023-08-26 15:54:55,703 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:54:55" (1/1) ... [2023-08-26 15:54:55,712 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:54:55" (1/1) ... [2023-08-26 15:54:55,723 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:54:55" (1/1) ... [2023-08-26 15:54:55,725 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:54:55" (1/1) ... [2023-08-26 15:54:55,726 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:54:55" (1/1) ... [2023-08-26 15:54:55,729 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 15:54:55,731 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 15:54:55,731 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 15:54:55,735 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 15:54:55,735 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:54:55" (1/1) ... [2023-08-26 15:54:55,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:54:55,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:54:55,759 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 15:54:55,766 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 15:54:55,785 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 15:54:55,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 15:54:55,786 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 15:54:55,786 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 15:54:55,786 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 15:54:55,786 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-26 15:54:55,786 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-26 15:54:55,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 15:54:55,787 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexTryLock [2023-08-26 15:54:55,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 15:54:55,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 15:54:55,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 15:54:55,788 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 15:54:55,900 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 15:54:55,902 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 15:54:56,270 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 15:54:56,284 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 15:54:56,285 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-08-26 15:54:56,287 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:54:56 BoogieIcfgContainer [2023-08-26 15:54:56,288 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 15:54:56,290 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 15:54:56,290 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 15:54:56,293 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 15:54:56,293 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 03:54:55" (1/3) ... [2023-08-26 15:54:56,294 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d6ee9ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:54:56, skipping insertion in model container [2023-08-26 15:54:56,294 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:54:55" (2/3) ... [2023-08-26 15:54:56,294 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d6ee9ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:54:56, skipping insertion in model container [2023-08-26 15:54:56,295 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:54:56" (3/3) ... [2023-08-26 15:54:56,296 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_42-trylock2_racefree.i [2023-08-26 15:54:56,316 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 15:54:56,316 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-08-26 15:54:56,316 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 15:54:56,401 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-26 15:54:56,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 206 transitions, 420 flow [2023-08-26 15:54:56,528 INFO L124 PetriNetUnfolderBase]: 53/313 cut-off events. [2023-08-26 15:54:56,528 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 15:54:56,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 319 conditions, 313 events. 53/313 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1260 event pairs, 0 based on Foata normal form. 0/241 useless extension candidates. Maximal degree in co-relation 165. Up to 6 conditions per place. [2023-08-26 15:54:56,535 INFO L82 GeneralOperation]: Start removeDead. Operand has 176 places, 206 transitions, 420 flow [2023-08-26 15:54:56,540 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 172 places, 201 transitions, 407 flow [2023-08-26 15:54:56,543 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:54:56,551 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 172 places, 201 transitions, 407 flow [2023-08-26 15:54:56,553 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 172 places, 201 transitions, 407 flow [2023-08-26 15:54:56,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 201 transitions, 407 flow [2023-08-26 15:54:56,595 INFO L124 PetriNetUnfolderBase]: 52/308 cut-off events. [2023-08-26 15:54:56,596 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:54:56,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313 conditions, 308 events. 52/308 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1240 event pairs, 0 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 165. Up to 6 conditions per place. [2023-08-26 15:54:56,603 INFO L119 LiptonReduction]: Number of co-enabled transitions 11978 [2023-08-26 15:55:00,544 INFO L134 LiptonReduction]: Checked pairs total: 25620 [2023-08-26 15:55:00,544 INFO L136 LiptonReduction]: Total number of compositions: 172 [2023-08-26 15:55:00,555 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:55:00,559 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;@4e2f1ffc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:55:00,560 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:55:00,565 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:55:00,565 INFO L124 PetriNetUnfolderBase]: 5/33 cut-off events. [2023-08-26 15:55:00,565 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:55:00,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:55:00,566 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-26 15:55:00,566 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:55:00,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:55:00,570 INFO L85 PathProgramCache]: Analyzing trace with hash -2050859729, now seen corresponding path program 1 times [2023-08-26 15:55:00,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:55:00,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529024277] [2023-08-26 15:55:00,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:55:00,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:55:00,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:55:00,681 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:55:00,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:55:00,723 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:55:00,724 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:55:00,725 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:55:00,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 15:55:00,727 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:55:00,729 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:55:00,730 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:55:00,730 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-26 15:55:00,759 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 15:55:00,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 261 transitions, 540 flow [2023-08-26 15:55:00,850 INFO L124 PetriNetUnfolderBase]: 88/502 cut-off events. [2023-08-26 15:55:00,850 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 15:55:00,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 516 conditions, 502 events. 88/502 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2281 event pairs, 0 based on Foata normal form. 0/384 useless extension candidates. Maximal degree in co-relation 315. Up to 9 conditions per place. [2023-08-26 15:55:00,856 INFO L82 GeneralOperation]: Start removeDead. Operand has 220 places, 261 transitions, 540 flow [2023-08-26 15:55:00,860 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 220 places, 261 transitions, 540 flow [2023-08-26 15:55:00,860 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:55:00,860 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 220 places, 261 transitions, 540 flow [2023-08-26 15:55:00,860 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 220 places, 261 transitions, 540 flow [2023-08-26 15:55:00,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 261 transitions, 540 flow [2023-08-26 15:55:00,906 INFO L124 PetriNetUnfolderBase]: 88/502 cut-off events. [2023-08-26 15:55:00,906 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 15:55:00,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 516 conditions, 502 events. 88/502 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2281 event pairs, 0 based on Foata normal form. 0/384 useless extension candidates. Maximal degree in co-relation 315. Up to 9 conditions per place. [2023-08-26 15:55:00,930 INFO L119 LiptonReduction]: Number of co-enabled transitions 30740 [2023-08-26 15:55:04,427 INFO L134 LiptonReduction]: Checked pairs total: 83712 [2023-08-26 15:55:04,427 INFO L136 LiptonReduction]: Total number of compositions: 200 [2023-08-26 15:55:04,429 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:55:04,430 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;@4e2f1ffc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:55:04,430 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:55:04,439 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:55:04,439 INFO L124 PetriNetUnfolderBase]: 37/141 cut-off events. [2023-08-26 15:55:04,439 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 15:55:04,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:55:04,439 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-26 15:55:04,440 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:55:04,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:55:04,440 INFO L85 PathProgramCache]: Analyzing trace with hash 558553239, now seen corresponding path program 1 times [2023-08-26 15:55:04,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:55:04,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607293468] [2023-08-26 15:55:04,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:55:04,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:55:04,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:55:04,469 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:55:04,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:55:04,498 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:55:04,498 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:55:04,499 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:55:04,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 15:55:04,499 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:55:04,500 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:55:04,500 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:55:04,500 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-26 15:55:04,524 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-26 15:55:04,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 264 places, 316 transitions, 662 flow [2023-08-26 15:55:04,604 INFO L124 PetriNetUnfolderBase]: 128/728 cut-off events. [2023-08-26 15:55:04,604 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 15:55:04,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 756 conditions, 728 events. 128/728 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3462 event pairs, 1 based on Foata normal form. 0/556 useless extension candidates. Maximal degree in co-relation 510. Up to 16 conditions per place. [2023-08-26 15:55:04,613 INFO L82 GeneralOperation]: Start removeDead. Operand has 264 places, 316 transitions, 662 flow [2023-08-26 15:55:04,620 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 264 places, 316 transitions, 662 flow [2023-08-26 15:55:04,620 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:55:04,621 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 264 places, 316 transitions, 662 flow [2023-08-26 15:55:04,621 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 264 places, 316 transitions, 662 flow [2023-08-26 15:55:04,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 264 places, 316 transitions, 662 flow [2023-08-26 15:55:04,697 INFO L124 PetriNetUnfolderBase]: 128/728 cut-off events. [2023-08-26 15:55:04,697 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 15:55:04,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 756 conditions, 728 events. 128/728 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3462 event pairs, 1 based on Foata normal form. 0/556 useless extension candidates. Maximal degree in co-relation 510. Up to 16 conditions per place. [2023-08-26 15:55:04,728 INFO L119 LiptonReduction]: Number of co-enabled transitions 55014 [2023-08-26 15:55:08,328 INFO L134 LiptonReduction]: Checked pairs total: 161239 [2023-08-26 15:55:08,328 INFO L136 LiptonReduction]: Total number of compositions: 226 [2023-08-26 15:55:08,330 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:55:08,331 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;@4e2f1ffc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:55:08,331 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:55:08,346 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:55:08,346 INFO L124 PetriNetUnfolderBase]: 68/237 cut-off events. [2023-08-26 15:55:08,346 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-26 15:55:08,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:55:08,346 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-26 15:55:08,346 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:55:08,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:55:08,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1709478654, now seen corresponding path program 1 times [2023-08-26 15:55:08,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:55:08,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344369902] [2023-08-26 15:55:08,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:55:08,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:55:08,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:55:08,376 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:55:08,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:55:08,401 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:55:08,401 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:55:08,402 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:55:08,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 15:55:08,402 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:55:08,403 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:55:08,403 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:55:08,403 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-26 15:55:08,433 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-26 15:55:08,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 308 places, 371 transitions, 786 flow [2023-08-26 15:55:08,592 INFO L124 PetriNetUnfolderBase]: 180/1030 cut-off events. [2023-08-26 15:55:08,592 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 15:55:08,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1085 conditions, 1030 events. 180/1030 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 5179 event pairs, 6 based on Foata normal form. 0/788 useless extension candidates. Maximal degree in co-relation 748. Up to 32 conditions per place. [2023-08-26 15:55:08,617 INFO L82 GeneralOperation]: Start removeDead. Operand has 308 places, 371 transitions, 786 flow [2023-08-26 15:55:08,631 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 308 places, 371 transitions, 786 flow [2023-08-26 15:55:08,631 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:55:08,632 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 308 places, 371 transitions, 786 flow [2023-08-26 15:55:08,632 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 308 places, 371 transitions, 786 flow [2023-08-26 15:55:08,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 308 places, 371 transitions, 786 flow [2023-08-26 15:55:08,760 INFO L124 PetriNetUnfolderBase]: 180/1030 cut-off events. [2023-08-26 15:55:08,761 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 15:55:08,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1085 conditions, 1030 events. 180/1030 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 5179 event pairs, 6 based on Foata normal form. 0/788 useless extension candidates. Maximal degree in co-relation 748. Up to 32 conditions per place. [2023-08-26 15:55:08,823 INFO L119 LiptonReduction]: Number of co-enabled transitions 85224 [2023-08-26 15:55:12,568 INFO L134 LiptonReduction]: Checked pairs total: 277415 [2023-08-26 15:55:12,568 INFO L136 LiptonReduction]: Total number of compositions: 250 [2023-08-26 15:55:12,570 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:55:12,571 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;@4e2f1ffc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:55:12,571 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:55:12,592 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:55:12,592 INFO L124 PetriNetUnfolderBase]: 80/294 cut-off events. [2023-08-26 15:55:12,593 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 15:55:12,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:55:12,593 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-26 15:55:12,593 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:55:12,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:55:12,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1748157408, now seen corresponding path program 1 times [2023-08-26 15:55:12,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:55:12,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922816358] [2023-08-26 15:55:12,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:55:12,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:55:12,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:55:12,630 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:55:12,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:55:12,670 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:55:12,670 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:55:12,671 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:55:12,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 15:55:12,671 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:55:12,671 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:55:12,672 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:55:12,672 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-26 15:55:12,711 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-26 15:55:12,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 352 places, 426 transitions, 912 flow [2023-08-26 15:55:12,974 INFO L124 PetriNetUnfolderBase]: 260/1488 cut-off events. [2023-08-26 15:55:12,974 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-26 15:55:13,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1599 conditions, 1488 events. 260/1488 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 8151 event pairs, 23 based on Foata normal form. 0/1144 useless extension candidates. Maximal degree in co-relation 1075. Up to 80 conditions per place. [2023-08-26 15:55:13,005 INFO L82 GeneralOperation]: Start removeDead. Operand has 352 places, 426 transitions, 912 flow [2023-08-26 15:55:13,021 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 352 places, 426 transitions, 912 flow [2023-08-26 15:55:13,021 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:55:13,022 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 352 places, 426 transitions, 912 flow [2023-08-26 15:55:13,022 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 352 places, 426 transitions, 912 flow [2023-08-26 15:55:13,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 352 places, 426 transitions, 912 flow [2023-08-26 15:55:13,262 INFO L124 PetriNetUnfolderBase]: 260/1488 cut-off events. [2023-08-26 15:55:13,262 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-26 15:55:13,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1599 conditions, 1488 events. 260/1488 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 8151 event pairs, 23 based on Foata normal form. 0/1144 useless extension candidates. Maximal degree in co-relation 1075. Up to 80 conditions per place. [2023-08-26 15:55:13,380 INFO L119 LiptonReduction]: Number of co-enabled transitions 121370 [2023-08-26 15:55:17,456 INFO L134 LiptonReduction]: Checked pairs total: 417540 [2023-08-26 15:55:17,456 INFO L136 LiptonReduction]: Total number of compositions: 280 [2023-08-26 15:55:17,458 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:55:17,459 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;@4e2f1ffc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:55:17,459 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:55:17,494 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:55:17,495 INFO L124 PetriNetUnfolderBase]: 121/419 cut-off events. [2023-08-26 15:55:17,495 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-26 15:55:17,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:55:17,495 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:55:17,495 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:55:17,495 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:55:17,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1299416028, now seen corresponding path program 1 times [2023-08-26 15:55:17,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:55:17,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485495296] [2023-08-26 15:55:17,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:55:17,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:55:17,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:55:17,533 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:55:17,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:55:17,579 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:55:17,579 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:55:17,579 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:55:17,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 15:55:17,580 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:55:17,580 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:55:17,580 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:55:17,580 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-26 15:55:17,638 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2023-08-26 15:55:17,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 396 places, 481 transitions, 1040 flow [2023-08-26 15:55:18,068 INFO L124 PetriNetUnfolderBase]: 404/2266 cut-off events. [2023-08-26 15:55:18,070 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-08-26 15:55:18,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2498 conditions, 2266 events. 404/2266 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 14004 event pairs, 72 based on Foata normal form. 0/1756 useless extension candidates. Maximal degree in co-relation 1587. Up to 192 conditions per place. [2023-08-26 15:55:18,144 INFO L82 GeneralOperation]: Start removeDead. Operand has 396 places, 481 transitions, 1040 flow [2023-08-26 15:55:18,175 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 396 places, 481 transitions, 1040 flow [2023-08-26 15:55:18,175 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:55:18,175 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 396 places, 481 transitions, 1040 flow [2023-08-26 15:55:18,176 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 396 places, 481 transitions, 1040 flow [2023-08-26 15:55:18,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 396 places, 481 transitions, 1040 flow [2023-08-26 15:55:18,632 INFO L124 PetriNetUnfolderBase]: 404/2266 cut-off events. [2023-08-26 15:55:18,632 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-08-26 15:55:18,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2498 conditions, 2266 events. 404/2266 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 14004 event pairs, 72 based on Foata normal form. 0/1756 useless extension candidates. Maximal degree in co-relation 1587. Up to 192 conditions per place. [2023-08-26 15:55:18,812 INFO L119 LiptonReduction]: Number of co-enabled transitions 163452 [2023-08-26 15:55:22,693 INFO L134 LiptonReduction]: Checked pairs total: 572680 [2023-08-26 15:55:22,693 INFO L136 LiptonReduction]: Total number of compositions: 296 [2023-08-26 15:55:22,695 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:55:22,695 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;@4e2f1ffc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:55:22,695 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:55:22,743 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:55:22,743 INFO L124 PetriNetUnfolderBase]: 145/512 cut-off events. [2023-08-26 15:55:22,744 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2023-08-26 15:55:22,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:55:22,744 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:55:22,744 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:55:22,744 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:55:22,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1798393229, now seen corresponding path program 1 times [2023-08-26 15:55:22,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:55:22,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276051338] [2023-08-26 15:55:22,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:55:22,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:55:22,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:55:22,771 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:55:22,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:55:22,794 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:55:22,795 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:55:22,795 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:55:22,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 15:55:22,795 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:55:22,796 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:55:22,796 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:55:22,796 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-26 15:55:22,835 INFO L144 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2023-08-26 15:55:22,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 440 places, 536 transitions, 1170 flow [2023-08-26 15:55:23,540 INFO L124 PetriNetUnfolderBase]: 692/3700 cut-off events. [2023-08-26 15:55:23,541 INFO L125 PetriNetUnfolderBase]: For 525/525 co-relation queries the response was YES. [2023-08-26 15:55:23,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4198 conditions, 3700 events. 692/3700 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 26177 event pairs, 201 based on Foata normal form. 0/2896 useless extension candidates. Maximal degree in co-relation 2484. Up to 448 conditions per place. [2023-08-26 15:55:23,655 INFO L82 GeneralOperation]: Start removeDead. Operand has 440 places, 536 transitions, 1170 flow [2023-08-26 15:55:23,702 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 440 places, 536 transitions, 1170 flow [2023-08-26 15:55:23,703 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:55:23,703 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 440 places, 536 transitions, 1170 flow [2023-08-26 15:55:23,703 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 440 places, 536 transitions, 1170 flow [2023-08-26 15:55:23,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 440 places, 536 transitions, 1170 flow [2023-08-26 15:55:24,484 INFO L124 PetriNetUnfolderBase]: 692/3700 cut-off events. [2023-08-26 15:55:24,485 INFO L125 PetriNetUnfolderBase]: For 525/525 co-relation queries the response was YES. [2023-08-26 15:55:24,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4198 conditions, 3700 events. 692/3700 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 26177 event pairs, 201 based on Foata normal form. 0/2896 useless extension candidates. Maximal degree in co-relation 2484. Up to 448 conditions per place. [2023-08-26 15:55:24,812 INFO L119 LiptonReduction]: Number of co-enabled transitions 211470 [2023-08-26 15:55:28,941 INFO L134 LiptonReduction]: Checked pairs total: 733871 [2023-08-26 15:55:28,941 INFO L136 LiptonReduction]: Total number of compositions: 329 [2023-08-26 15:55:28,943 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:55:28,943 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;@4e2f1ffc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:55:28,943 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:55:29,000 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:55:29,001 INFO L124 PetriNetUnfolderBase]: 159/579 cut-off events. [2023-08-26 15:55:29,001 INFO L125 PetriNetUnfolderBase]: For 97/97 co-relation queries the response was YES. [2023-08-26 15:55:29,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:55:29,001 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:55:29,001 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:55:29,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:55:29,002 INFO L85 PathProgramCache]: Analyzing trace with hash -757345192, now seen corresponding path program 1 times [2023-08-26 15:55:29,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:55:29,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089554943] [2023-08-26 15:55:29,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:55:29,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:55:29,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:55:29,025 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:55:29,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:55:29,046 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:55:29,046 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:55:29,047 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:55:29,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 15:55:29,047 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:55:29,047 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:55:29,047 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:55:29,047 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-08-26 15:55:29,079 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-26 15:55:29,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 484 places, 591 transitions, 1302 flow [2023-08-26 15:55:30,572 INFO L124 PetriNetUnfolderBase]: 1300/6478 cut-off events. [2023-08-26 15:55:30,572 INFO L125 PetriNetUnfolderBase]: For 1136/1136 co-relation queries the response was YES. [2023-08-26 15:55:30,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7563 conditions, 6478 events. 1300/6478 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 53936 event pairs, 522 based on Foata normal form. 0/5124 useless extension candidates. Maximal degree in co-relation 4182. Up to 1024 conditions per place. [2023-08-26 15:55:30,752 INFO L82 GeneralOperation]: Start removeDead. Operand has 484 places, 591 transitions, 1302 flow [2023-08-26 15:55:30,814 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 484 places, 591 transitions, 1302 flow [2023-08-26 15:55:30,815 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:55:30,815 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 484 places, 591 transitions, 1302 flow [2023-08-26 15:55:30,815 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 484 places, 591 transitions, 1302 flow [2023-08-26 15:55:30,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 484 places, 591 transitions, 1302 flow [2023-08-26 15:55:32,299 INFO L124 PetriNetUnfolderBase]: 1300/6478 cut-off events. [2023-08-26 15:55:32,300 INFO L125 PetriNetUnfolderBase]: For 1136/1136 co-relation queries the response was YES. [2023-08-26 15:55:32,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7563 conditions, 6478 events. 1300/6478 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 53936 event pairs, 522 based on Foata normal form. 0/5124 useless extension candidates. Maximal degree in co-relation 4182. Up to 1024 conditions per place. [2023-08-26 15:55:32,856 INFO L119 LiptonReduction]: Number of co-enabled transitions 265424 [2023-08-26 15:55:37,089 INFO L134 LiptonReduction]: Checked pairs total: 858178 [2023-08-26 15:55:37,089 INFO L136 LiptonReduction]: Total number of compositions: 354 [2023-08-26 15:55:37,090 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:55:37,091 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;@4e2f1ffc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:55:37,091 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:55:37,157 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:55:37,157 INFO L124 PetriNetUnfolderBase]: 206/738 cut-off events. [2023-08-26 15:55:37,157 INFO L125 PetriNetUnfolderBase]: For 147/147 co-relation queries the response was YES. [2023-08-26 15:55:37,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:55:37,158 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:55:37,158 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:55:37,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:55:37,158 INFO L85 PathProgramCache]: Analyzing trace with hash 917293674, now seen corresponding path program 1 times [2023-08-26 15:55:37,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:55:37,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660544603] [2023-08-26 15:55:37,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:55:37,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:55:37,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:55:37,179 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:55:37,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:55:37,202 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:55:37,202 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:55:37,202 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:55:37,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 15:55:37,203 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:55:37,203 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:55:37,203 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:55:37,203 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-08-26 15:55:37,238 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-26 15:55:37,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 528 places, 646 transitions, 1436 flow [2023-08-26 15:55:40,531 INFO L124 PetriNetUnfolderBase]: 2612/12008 cut-off events. [2023-08-26 15:55:40,531 INFO L125 PetriNetUnfolderBase]: For 2460/2460 co-relation queries the response was YES. [2023-08-26 15:55:40,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14385 conditions, 12008 events. 2612/12008 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 114537 event pairs, 1291 based on Foata normal form. 0/9592 useless extension candidates. Maximal degree in co-relation 7545. Up to 2304 conditions per place. [2023-08-26 15:55:40,792 INFO L82 GeneralOperation]: Start removeDead. Operand has 528 places, 646 transitions, 1436 flow [2023-08-26 15:55:40,935 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 528 places, 646 transitions, 1436 flow [2023-08-26 15:55:40,935 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:55:40,935 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 528 places, 646 transitions, 1436 flow [2023-08-26 15:55:40,936 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 528 places, 646 transitions, 1436 flow [2023-08-26 15:55:40,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 528 places, 646 transitions, 1436 flow [2023-08-26 15:55:43,955 INFO L124 PetriNetUnfolderBase]: 2612/12008 cut-off events. [2023-08-26 15:55:43,956 INFO L125 PetriNetUnfolderBase]: For 2460/2460 co-relation queries the response was YES. [2023-08-26 15:55:44,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14385 conditions, 12008 events. 2612/12008 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 114537 event pairs, 1291 based on Foata normal form. 0/9592 useless extension candidates. Maximal degree in co-relation 7545. Up to 2304 conditions per place. [2023-08-26 15:55:45,142 INFO L119 LiptonReduction]: Number of co-enabled transitions 325314 [2023-08-26 15:55:49,692 INFO L134 LiptonReduction]: Checked pairs total: 1047649 [2023-08-26 15:55:49,692 INFO L136 LiptonReduction]: Total number of compositions: 384 [2023-08-26 15:55:49,694 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:55:49,695 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;@4e2f1ffc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:55:49,695 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:55:49,785 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:55:49,786 INFO L124 PetriNetUnfolderBase]: 235/858 cut-off events. [2023-08-26 15:55:49,786 INFO L125 PetriNetUnfolderBase]: For 215/215 co-relation queries the response was YES. [2023-08-26 15:55:49,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:55:49,786 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:55:49,786 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:55:49,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:55:49,787 INFO L85 PathProgramCache]: Analyzing trace with hash 385408136, now seen corresponding path program 1 times [2023-08-26 15:55:49,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:55:49,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725725951] [2023-08-26 15:55:49,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:55:49,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:55:49,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:55:49,809 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:55:49,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:55:49,830 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:55:49,830 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:55:49,830 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:55:49,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 15:55:49,831 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:55:49,831 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:55:49,831 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:55:49,831 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-08-26 15:55:49,868 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2023-08-26 15:55:49,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 572 places, 701 transitions, 1572 flow [2023-08-26 15:55:56,894 INFO L124 PetriNetUnfolderBase]: 5460/23170 cut-off events. [2023-08-26 15:55:56,894 INFO L125 PetriNetUnfolderBase]: For 5330/5330 co-relation queries the response was YES. [2023-08-26 15:55:57,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28376 conditions, 23170 events. 5460/23170 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 253260 event pairs, 3084 based on Foata normal form. 0/18668 useless extension candidates. Maximal degree in co-relation 14365. Up to 5120 conditions per place. [2023-08-26 15:55:57,515 INFO L82 GeneralOperation]: Start removeDead. Operand has 572 places, 701 transitions, 1572 flow [2023-08-26 15:55:57,844 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 572 places, 701 transitions, 1572 flow [2023-08-26 15:55:57,844 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:55:57,844 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 572 places, 701 transitions, 1572 flow [2023-08-26 15:55:57,845 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 572 places, 701 transitions, 1572 flow [2023-08-26 15:55:57,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 572 places, 701 transitions, 1572 flow [2023-08-26 15:56:04,573 INFO L124 PetriNetUnfolderBase]: 5460/23170 cut-off events. [2023-08-26 15:56:04,573 INFO L125 PetriNetUnfolderBase]: For 5330/5330 co-relation queries the response was YES. [2023-08-26 15:56:05,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28376 conditions, 23170 events. 5460/23170 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 253260 event pairs, 3084 based on Foata normal form. 0/18668 useless extension candidates. Maximal degree in co-relation 14365. Up to 5120 conditions per place. [2023-08-26 15:56:06,955 INFO L119 LiptonReduction]: Number of co-enabled transitions 391140 [2023-08-26 15:56:11,630 INFO L134 LiptonReduction]: Checked pairs total: 1280400 [2023-08-26 15:56:11,631 INFO L136 LiptonReduction]: Total number of compositions: 411 [2023-08-26 15:56:11,632 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:56:11,632 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;@4e2f1ffc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:56:11,632 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:56:11,743 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:56:11,743 INFO L124 PetriNetUnfolderBase]: 289/1051 cut-off events. [2023-08-26 15:56:11,743 INFO L125 PetriNetUnfolderBase]: For 308/308 co-relation queries the response was YES. [2023-08-26 15:56:11,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:56:11,743 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:56:11,743 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:56:11,744 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:56:11,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1955303438, now seen corresponding path program 1 times [2023-08-26 15:56:11,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:56:11,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861940098] [2023-08-26 15:56:11,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:56:11,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:56:11,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:56:11,767 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:56:11,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:56:11,790 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:56:11,790 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:56:11,790 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:56:11,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 15:56:11,790 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:56:11,791 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:56:11,791 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:56:11,791 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-08-26 15:56:11,830 INFO L144 ThreadInstanceAdder]: Constructed 11 joinOtherThreadTransitions. [2023-08-26 15:56:11,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 616 places, 756 transitions, 1710 flow [2023-08-26 15:56:26,836 INFO L124 PetriNetUnfolderBase]: 11636/45852 cut-off events. [2023-08-26 15:56:26,837 INFO L125 PetriNetUnfolderBase]: For 11539/11539 co-relation queries the response was YES. [2023-08-26 15:56:29,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57216 conditions, 45852 events. 11636/45852 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 1134. Compared 560488 event pairs, 7181 based on Foata normal form. 0/37216 useless extension candidates. Maximal degree in co-relation 28354. Up to 11264 conditions per place. [2023-08-26 15:56:29,001 INFO L82 GeneralOperation]: Start removeDead. Operand has 616 places, 756 transitions, 1710 flow [2023-08-26 15:56:30,212 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 616 places, 756 transitions, 1710 flow [2023-08-26 15:56:30,213 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:56:30,213 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 616 places, 756 transitions, 1710 flow [2023-08-26 15:56:30,213 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 616 places, 756 transitions, 1710 flow [2023-08-26 15:56:30,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 616 places, 756 transitions, 1710 flow [2023-08-26 15:56:45,147 INFO L124 PetriNetUnfolderBase]: 11636/45852 cut-off events. [2023-08-26 15:56:45,147 INFO L125 PetriNetUnfolderBase]: For 11539/11539 co-relation queries the response was YES. [2023-08-26 15:56:47,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57216 conditions, 45852 events. 11636/45852 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 1134. Compared 560488 event pairs, 7181 based on Foata normal form. 0/37216 useless extension candidates. Maximal degree in co-relation 28354. Up to 11264 conditions per place. [2023-08-26 15:56:51,296 INFO L119 LiptonReduction]: Number of co-enabled transitions 462902 [2023-08-26 15:56:56,101 INFO L134 LiptonReduction]: Checked pairs total: 1520105 [2023-08-26 15:56:56,102 INFO L136 LiptonReduction]: Total number of compositions: 431 [2023-08-26 15:56:56,104 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:56:56,104 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;@4e2f1ffc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:56:56,105 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:56:56,236 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:56:56,236 INFO L124 PetriNetUnfolderBase]: 333/1233 cut-off events. [2023-08-26 15:56:56,236 INFO L125 PetriNetUnfolderBase]: For 436/436 co-relation queries the response was YES. [2023-08-26 15:56:56,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:56:56,236 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:56:56,236 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:56:56,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:56:56,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1807109437, now seen corresponding path program 1 times [2023-08-26 15:56:56,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:56:56,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628391342] [2023-08-26 15:56:56,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:56:56,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:56:56,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:56:56,274 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:56:56,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:56:56,298 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:56:56,298 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:56:56,298 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:56:56,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 15:56:56,299 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:56:56,299 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:56:56,299 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:56:56,299 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-08-26 15:56:56,344 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2023-08-26 15:56:56,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 660 places, 811 transitions, 1850 flow [2023-08-26 15:57:30,990 INFO L124 PetriNetUnfolderBase]: 24980/92086 cut-off events. [2023-08-26 15:57:30,991 INFO L125 PetriNetUnfolderBase]: For 24928/24928 co-relation queries the response was YES. [2023-08-26 15:57:38,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116777 conditions, 92086 events. 24980/92086 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 2195. Compared 1226428 event pairs, 16398 based on Foata normal form. 0/75220 useless extension candidates. Maximal degree in co-relation 57192. Up to 24576 conditions per place. [2023-08-26 15:57:38,663 INFO L82 GeneralOperation]: Start removeDead. Operand has 660 places, 811 transitions, 1850 flow [2023-08-26 15:57:42,020 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 660 places, 811 transitions, 1850 flow [2023-08-26 15:57:42,020 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:57:42,021 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 660 places, 811 transitions, 1850 flow [2023-08-26 15:57:42,021 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 660 places, 811 transitions, 1850 flow [2023-08-26 15:57:42,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 660 places, 811 transitions, 1850 flow [2023-08-26 15:58:15,108 INFO L124 PetriNetUnfolderBase]: 24980/92086 cut-off events. [2023-08-26 15:58:15,108 INFO L125 PetriNetUnfolderBase]: For 24928/24928 co-relation queries the response was YES. [2023-08-26 15:58:24,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116777 conditions, 92086 events. 24980/92086 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 2195. Compared 1226428 event pairs, 16398 based on Foata normal form. 0/75220 useless extension candidates. Maximal degree in co-relation 57192. Up to 24576 conditions per place. [2023-08-26 15:58:37,807 INFO L119 LiptonReduction]: Number of co-enabled transitions 540600 [2023-08-26 15:58:42,917 INFO L134 LiptonReduction]: Checked pairs total: 1794177 [2023-08-26 15:58:42,917 INFO L136 LiptonReduction]: Total number of compositions: 455 [2023-08-26 15:58:42,918 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:58:42,918 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;@4e2f1ffc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:58:42,918 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:58:43,148 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:58:43,148 INFO L124 PetriNetUnfolderBase]: 429/1559 cut-off events. [2023-08-26 15:58:43,148 INFO L125 PetriNetUnfolderBase]: For 613/613 co-relation queries the response was YES. [2023-08-26 15:58:43,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:58:43,148 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 15:58:43,148 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:58:43,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:58:43,149 INFO L85 PathProgramCache]: Analyzing trace with hash -404424380, now seen corresponding path program 1 times [2023-08-26 15:58:43,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:58:43,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838170396] [2023-08-26 15:58:43,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:58:43,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:58:43,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:58:43,174 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:58:43,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:58:43,198 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:58:43,199 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:58:43,199 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:58:43,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 15:58:43,199 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:58:43,200 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:58:43,200 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:58:43,200 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-08-26 15:58:43,246 INFO L144 ThreadInstanceAdder]: Constructed 13 joinOtherThreadTransitions. [2023-08-26 15:58:43,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 704 places, 866 transitions, 1992 flow [2023-08-26 16:00:12,068 INFO L124 PetriNetUnfolderBase]: 53684/186448 cut-off events. [2023-08-26 16:00:12,068 INFO L125 PetriNetUnfolderBase]: For 53690/53690 co-relation queries the response was YES. [2023-08-26 16:00:32,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239827 conditions, 186448 events. 53684/186448 cut-off events. For 53690/53690 co-relation queries the response was YES. Maximal size of possible extension queue 4209. Compared 2710801 event pairs, 36879 based on Foata normal form. 0/153160 useless extension candidates. Maximal degree in co-relation 116751. Up to 53248 conditions per place. [2023-08-26 16:00:32,828 INFO L82 GeneralOperation]: Start removeDead. Operand has 704 places, 866 transitions, 1992 flow [2023-08-26 16:00:44,129 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 704 places, 866 transitions, 1992 flow [2023-08-26 16:00:44,129 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 16:00:44,129 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 704 places, 866 transitions, 1992 flow [2023-08-26 16:00:44,129 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 704 places, 866 transitions, 1992 flow [2023-08-26 16:00:44,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 704 places, 866 transitions, 1992 flow