/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_24-sound_lock_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 15:45:50,351 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 15:45:50,404 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 15:45:50,408 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 15:45:50,409 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 15:45:50,428 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 15:45:50,428 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 15:45:50,429 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 15:45:50,429 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 15:45:50,430 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 15:45:50,430 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 15:45:50,430 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 15:45:50,431 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 15:45:50,431 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 15:45:50,431 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 15:45:50,431 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 15:45:50,432 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 15:45:50,432 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 15:45:50,432 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 15:45:50,433 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 15:45:50,433 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 15:45:50,440 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 15:45:50,440 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 15:45:50,440 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 15:45:50,441 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 15:45:50,441 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 15:45:50,441 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 15:45:50,441 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:45:50,442 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 15:45:50,442 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 15:45:50,442 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 15:45:50,443 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 15:45:50,443 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 15:45:50,443 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 15:45:50,444 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 15:45:50,444 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 15:45:50,732 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 15:45:50,749 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 15:45:50,751 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 15:45:50,752 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 15:45:50,754 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 15:45:50,755 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_24-sound_lock_racing.i [2023-08-26 15:45:52,009 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 15:45:52,256 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 15:45:52,256 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_24-sound_lock_racing.i [2023-08-26 15:45:52,271 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c37ddeb40/1574612d0bf94da0af80750904b4045a/FLAGb0adbdf10 [2023-08-26 15:45:52,285 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c37ddeb40/1574612d0bf94da0af80750904b4045a [2023-08-26 15:45:52,287 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 15:45:52,288 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 15:45:52,290 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 15:45:52,290 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 15:45:52,292 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 15:45:52,293 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:45:52" (1/1) ... [2023-08-26 15:45:52,294 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30d3eec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:45:52, skipping insertion in model container [2023-08-26 15:45:52,294 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:45:52" (1/1) ... [2023-08-26 15:45:52,332 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 15:45:52,671 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:45:52,682 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 15:45:52,709 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 15:45:52,710 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 15:45:52,736 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:45:52,773 INFO L206 MainTranslator]: Completed translation [2023-08-26 15:45:52,773 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:45:52 WrapperNode [2023-08-26 15:45:52,773 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 15:45:52,774 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 15:45:52,775 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 15:45:52,775 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 15:45:52,780 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:45:52" (1/1) ... [2023-08-26 15:45:52,794 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:45:52" (1/1) ... [2023-08-26 15:45:52,819 INFO L138 Inliner]: procedures = 170, calls = 37, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 91 [2023-08-26 15:45:52,820 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 15:45:52,820 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 15:45:52,820 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 15:45:52,821 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 15:45:52,827 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:45:52" (1/1) ... [2023-08-26 15:45:52,827 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:45:52" (1/1) ... [2023-08-26 15:45:52,830 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:45:52" (1/1) ... [2023-08-26 15:45:52,830 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:45:52" (1/1) ... [2023-08-26 15:45:52,837 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:45:52" (1/1) ... [2023-08-26 15:45:52,840 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:45:52" (1/1) ... [2023-08-26 15:45:52,841 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:45:52" (1/1) ... [2023-08-26 15:45:52,842 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:45:52" (1/1) ... [2023-08-26 15:45:52,847 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 15:45:52,848 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 15:45:52,848 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 15:45:52,848 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 15:45:52,849 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:45:52" (1/1) ... [2023-08-26 15:45:52,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:45:52,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:45:52,876 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 15:45:52,893 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 15:45:52,915 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 15:45:52,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 15:45:52,915 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 15:45:52,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 15:45:52,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 15:45:52,916 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-26 15:45:52,916 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-26 15:45:52,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 15:45:52,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 15:45:52,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 15:45:52,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 15:45:52,917 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 15:45:53,041 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 15:45:53,042 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 15:45:53,219 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 15:45:53,225 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 15:45:53,226 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-26 15:45:53,227 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:45:53 BoogieIcfgContainer [2023-08-26 15:45:53,227 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 15:45:53,229 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 15:45:53,229 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 15:45:53,232 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 15:45:53,232 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 03:45:52" (1/3) ... [2023-08-26 15:45:53,232 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a02e0ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:45:53, skipping insertion in model container [2023-08-26 15:45:53,232 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:45:52" (2/3) ... [2023-08-26 15:45:53,233 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a02e0ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:45:53, skipping insertion in model container [2023-08-26 15:45:53,233 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:45:53" (3/3) ... [2023-08-26 15:45:53,235 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_24-sound_lock_racing.i [2023-08-26 15:45:53,249 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 15:45:53,249 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2023-08-26 15:45:53,249 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 15:45:53,326 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-26 15:45:53,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 124 transitions, 256 flow [2023-08-26 15:45:53,430 INFO L124 PetriNetUnfolderBase]: 20/167 cut-off events. [2023-08-26 15:45:53,430 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 15:45:53,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 167 events. 20/167 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 388 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 84. Up to 4 conditions per place. [2023-08-26 15:45:53,437 INFO L82 GeneralOperation]: Start removeDead. Operand has 113 places, 124 transitions, 256 flow [2023-08-26 15:45:53,442 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 119 transitions, 243 flow [2023-08-26 15:45:53,447 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:45:53,454 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 119 transitions, 243 flow [2023-08-26 15:45:53,456 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 119 transitions, 243 flow [2023-08-26 15:45:53,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 119 transitions, 243 flow [2023-08-26 15:45:53,503 INFO L124 PetriNetUnfolderBase]: 19/162 cut-off events. [2023-08-26 15:45:53,503 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:45:53,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 162 events. 19/162 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 368 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 84. Up to 4 conditions per place. [2023-08-26 15:45:53,507 INFO L119 LiptonReduction]: Number of co-enabled transitions 2744 [2023-08-26 15:45:57,207 INFO L134 LiptonReduction]: Checked pairs total: 4470 [2023-08-26 15:45:57,208 INFO L136 LiptonReduction]: Total number of compositions: 107 [2023-08-26 15:45:57,230 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:45:57,238 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;@15afae3e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:45:57,239 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:45:57,247 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:45:57,247 INFO L124 PetriNetUnfolderBase]: 3/29 cut-off events. [2023-08-26 15:45:57,247 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:45:57,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:45:57,248 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-26 15:45:57,248 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:45:57,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:45:57,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1149229007, now seen corresponding path program 1 times [2023-08-26 15:45:57,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:45:57,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101721143] [2023-08-26 15:45:57,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:45:57,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:45:57,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:45:57,422 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:45:57,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:45:57,481 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:45:57,482 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:45:57,483 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:45:57,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 15:45:57,485 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:45:57,487 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:45:57,487 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:45:57,488 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-26 15:45:57,513 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 15:45:57,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 154 transitions, 326 flow [2023-08-26 15:45:57,576 INFO L124 PetriNetUnfolderBase]: 35/267 cut-off events. [2023-08-26 15:45:57,576 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 15:45:57,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 281 conditions, 267 events. 35/267 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 780 event pairs, 0 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 169. Up to 8 conditions per place. [2023-08-26 15:45:57,582 INFO L82 GeneralOperation]: Start removeDead. Operand has 138 places, 154 transitions, 326 flow [2023-08-26 15:45:57,585 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 138 places, 154 transitions, 326 flow [2023-08-26 15:45:57,585 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:45:57,585 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 138 places, 154 transitions, 326 flow [2023-08-26 15:45:57,585 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 138 places, 154 transitions, 326 flow [2023-08-26 15:45:57,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 154 transitions, 326 flow [2023-08-26 15:45:57,617 INFO L124 PetriNetUnfolderBase]: 35/267 cut-off events. [2023-08-26 15:45:57,617 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 15:45:57,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 281 conditions, 267 events. 35/267 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 780 event pairs, 0 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 169. Up to 8 conditions per place. [2023-08-26 15:45:57,627 INFO L119 LiptonReduction]: Number of co-enabled transitions 7672 [2023-08-26 15:46:01,037 INFO L134 LiptonReduction]: Checked pairs total: 19805 [2023-08-26 15:46:01,037 INFO L136 LiptonReduction]: Total number of compositions: 119 [2023-08-26 15:46:01,039 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:46:01,040 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;@15afae3e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:46:01,040 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:46:01,046 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:46:01,046 INFO L124 PetriNetUnfolderBase]: 16/76 cut-off events. [2023-08-26 15:46:01,046 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 15:46:01,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:46:01,047 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-26 15:46:01,047 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:46:01,047 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:46:01,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1910776533, now seen corresponding path program 1 times [2023-08-26 15:46:01,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:46:01,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637027360] [2023-08-26 15:46:01,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:46:01,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:46:01,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:46:01,079 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:46:01,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:46:01,103 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:46:01,104 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:46:01,104 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:46:01,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 15:46:01,104 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:46:01,105 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:46:01,105 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:46:01,105 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-26 15:46:01,131 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-26 15:46:01,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 184 transitions, 398 flow [2023-08-26 15:46:01,188 INFO L124 PetriNetUnfolderBase]: 55/404 cut-off events. [2023-08-26 15:46:01,188 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 15:46:01,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 404 events. 55/404 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1357 event pairs, 1 based on Foata normal form. 0/317 useless extension candidates. Maximal degree in co-relation 275. Up to 16 conditions per place. [2023-08-26 15:46:01,191 INFO L82 GeneralOperation]: Start removeDead. Operand has 163 places, 184 transitions, 398 flow [2023-08-26 15:46:01,193 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 163 places, 184 transitions, 398 flow [2023-08-26 15:46:01,194 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:46:01,194 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 163 places, 184 transitions, 398 flow [2023-08-26 15:46:01,194 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 163 places, 184 transitions, 398 flow [2023-08-26 15:46:01,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 184 transitions, 398 flow [2023-08-26 15:46:01,235 INFO L124 PetriNetUnfolderBase]: 55/404 cut-off events. [2023-08-26 15:46:01,235 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 15:46:01,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 404 events. 55/404 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1357 event pairs, 1 based on Foata normal form. 0/317 useless extension candidates. Maximal degree in co-relation 275. Up to 16 conditions per place. [2023-08-26 15:46:01,248 INFO L119 LiptonReduction]: Number of co-enabled transitions 14112 [2023-08-26 15:46:04,637 INFO L134 LiptonReduction]: Checked pairs total: 39330 [2023-08-26 15:46:04,637 INFO L136 LiptonReduction]: Total number of compositions: 137 [2023-08-26 15:46:04,639 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:46:04,640 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;@15afae3e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:46:04,640 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:46:04,648 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:46:04,648 INFO L124 PetriNetUnfolderBase]: 21/107 cut-off events. [2023-08-26 15:46:04,648 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-26 15:46:04,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:46:04,649 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-26 15:46:04,649 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:46:04,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:46:04,649 INFO L85 PathProgramCache]: Analyzing trace with hash 573873737, now seen corresponding path program 1 times [2023-08-26 15:46:04,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:46:04,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495372593] [2023-08-26 15:46:04,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:46:04,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:46:04,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:46:04,685 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:46:04,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:46:04,718 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:46:04,718 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:46:04,718 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:46:04,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 15:46:04,718 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:46:04,719 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:46:04,719 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:46:04,719 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-26 15:46:04,750 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-26 15:46:04,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 188 places, 214 transitions, 472 flow [2023-08-26 15:46:04,820 INFO L124 PetriNetUnfolderBase]: 87/617 cut-off events. [2023-08-26 15:46:04,821 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 15:46:04,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 672 conditions, 617 events. 87/617 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2432 event pairs, 6 based on Foata normal form. 0/483 useless extension candidates. Maximal degree in co-relation 424. Up to 32 conditions per place. [2023-08-26 15:46:04,825 INFO L82 GeneralOperation]: Start removeDead. Operand has 188 places, 214 transitions, 472 flow [2023-08-26 15:46:04,833 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 188 places, 214 transitions, 472 flow [2023-08-26 15:46:04,833 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:46:04,834 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 188 places, 214 transitions, 472 flow [2023-08-26 15:46:04,834 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 188 places, 214 transitions, 472 flow [2023-08-26 15:46:04,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 188 places, 214 transitions, 472 flow [2023-08-26 15:46:04,900 INFO L124 PetriNetUnfolderBase]: 87/617 cut-off events. [2023-08-26 15:46:04,900 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 15:46:04,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 672 conditions, 617 events. 87/617 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2432 event pairs, 6 based on Foata normal form. 0/483 useless extension candidates. Maximal degree in co-relation 424. Up to 32 conditions per place. [2023-08-26 15:46:04,924 INFO L119 LiptonReduction]: Number of co-enabled transitions 22288 [2023-08-26 15:46:08,388 INFO L134 LiptonReduction]: Checked pairs total: 59797 [2023-08-26 15:46:08,388 INFO L136 LiptonReduction]: Total number of compositions: 150 [2023-08-26 15:46:08,390 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:46:08,391 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;@15afae3e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:46:08,391 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:46:08,402 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:46:08,402 INFO L124 PetriNetUnfolderBase]: 33/156 cut-off events. [2023-08-26 15:46:08,402 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-08-26 15:46:08,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:46:08,402 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-26 15:46:08,403 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:46:08,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:46:08,403 INFO L85 PathProgramCache]: Analyzing trace with hash 667752838, now seen corresponding path program 1 times [2023-08-26 15:46:08,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:46:08,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379328821] [2023-08-26 15:46:08,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:46:08,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:46:08,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:46:08,444 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:46:08,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:46:08,479 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:46:08,479 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:46:08,479 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:46:08,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 15:46:08,479 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:46:08,480 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:46:08,480 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:46:08,480 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-26 15:46:08,515 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-26 15:46:08,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 244 transitions, 548 flow [2023-08-26 15:46:08,636 INFO L124 PetriNetUnfolderBase]: 147/986 cut-off events. [2023-08-26 15:46:08,636 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-26 15:46:08,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1097 conditions, 986 events. 147/986 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4710 event pairs, 23 based on Foata normal form. 0/773 useless extension candidates. Maximal degree in co-relation 662. Up to 80 conditions per place. [2023-08-26 15:46:08,645 INFO L82 GeneralOperation]: Start removeDead. Operand has 213 places, 244 transitions, 548 flow [2023-08-26 15:46:08,653 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 213 places, 244 transitions, 548 flow [2023-08-26 15:46:08,654 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:46:08,654 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 213 places, 244 transitions, 548 flow [2023-08-26 15:46:08,655 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 213 places, 244 transitions, 548 flow [2023-08-26 15:46:08,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 244 transitions, 548 flow [2023-08-26 15:46:08,774 INFO L124 PetriNetUnfolderBase]: 147/986 cut-off events. [2023-08-26 15:46:08,774 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-26 15:46:08,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1097 conditions, 986 events. 147/986 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4710 event pairs, 23 based on Foata normal form. 0/773 useless extension candidates. Maximal degree in co-relation 662. Up to 80 conditions per place. [2023-08-26 15:46:08,814 INFO L119 LiptonReduction]: Number of co-enabled transitions 32200 [2023-08-26 15:46:12,335 INFO L134 LiptonReduction]: Checked pairs total: 98643 [2023-08-26 15:46:12,336 INFO L136 LiptonReduction]: Total number of compositions: 167 [2023-08-26 15:46:12,337 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:46:12,338 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;@15afae3e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:46:12,338 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:46:12,377 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:46:12,377 INFO L124 PetriNetUnfolderBase]: 43/209 cut-off events. [2023-08-26 15:46:12,377 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-08-26 15:46:12,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:46:12,378 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:46:12,378 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:46:12,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:46:12,378 INFO L85 PathProgramCache]: Analyzing trace with hash 969319130, now seen corresponding path program 1 times [2023-08-26 15:46:12,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:46:12,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527596223] [2023-08-26 15:46:12,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:46:12,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:46:12,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:46:12,426 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:46:12,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:46:12,473 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:46:12,474 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:46:12,474 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:46:12,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 15:46:12,474 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:46:12,475 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:46:12,475 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:46:12,475 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-26 15:46:12,500 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2023-08-26 15:46:12,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 238 places, 274 transitions, 626 flow [2023-08-26 15:46:12,732 INFO L124 PetriNetUnfolderBase]: 271/1675 cut-off events. [2023-08-26 15:46:12,733 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-08-26 15:46:12,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1907 conditions, 1675 events. 271/1675 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 9960 event pairs, 72 based on Foata normal form. 0/1319 useless extension candidates. Maximal degree in co-relation 1085. Up to 192 conditions per place. [2023-08-26 15:46:12,756 INFO L82 GeneralOperation]: Start removeDead. Operand has 238 places, 274 transitions, 626 flow [2023-08-26 15:46:12,774 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 238 places, 274 transitions, 626 flow [2023-08-26 15:46:12,774 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:46:12,774 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 238 places, 274 transitions, 626 flow [2023-08-26 15:46:12,775 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 238 places, 274 transitions, 626 flow [2023-08-26 15:46:12,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 238 places, 274 transitions, 626 flow [2023-08-26 15:46:13,039 INFO L124 PetriNetUnfolderBase]: 271/1675 cut-off events. [2023-08-26 15:46:13,039 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-08-26 15:46:13,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1907 conditions, 1675 events. 271/1675 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 9960 event pairs, 72 based on Foata normal form. 0/1319 useless extension candidates. Maximal degree in co-relation 1085. Up to 192 conditions per place. [2023-08-26 15:46:13,094 INFO L119 LiptonReduction]: Number of co-enabled transitions 43848 [2023-08-26 15:46:16,866 INFO L134 LiptonReduction]: Checked pairs total: 141535 [2023-08-26 15:46:16,866 INFO L136 LiptonReduction]: Total number of compositions: 179 [2023-08-26 15:46:16,868 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:46:16,868 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;@15afae3e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:46:16,869 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:46:16,890 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:46:16,891 INFO L124 PetriNetUnfolderBase]: 70/300 cut-off events. [2023-08-26 15:46:16,891 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2023-08-26 15:46:16,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:46:16,891 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:46:16,891 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:46:16,891 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:46:16,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1889403015, now seen corresponding path program 1 times [2023-08-26 15:46:16,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:46:16,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902489470] [2023-08-26 15:46:16,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:46:16,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:46:16,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:46:16,929 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:46:16,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:46:16,974 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:46:16,977 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:46:16,977 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:46:16,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 15:46:16,978 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:46:16,980 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:46:16,980 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:46:16,981 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-26 15:46:17,008 INFO L144 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2023-08-26 15:46:17,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 263 places, 304 transitions, 706 flow [2023-08-26 15:46:17,499 INFO L124 PetriNetUnfolderBase]: 539/3020 cut-off events. [2023-08-26 15:46:17,499 INFO L125 PetriNetUnfolderBase]: For 525/525 co-relation queries the response was YES. [2023-08-26 15:46:17,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3518 conditions, 3020 events. 539/3020 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 21601 event pairs, 201 based on Foata normal form. 0/2393 useless extension candidates. Maximal degree in co-relation 1893. Up to 448 conditions per place. [2023-08-26 15:46:17,538 INFO L82 GeneralOperation]: Start removeDead. Operand has 263 places, 304 transitions, 706 flow [2023-08-26 15:46:17,561 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 263 places, 304 transitions, 706 flow [2023-08-26 15:46:17,562 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:46:17,562 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 263 places, 304 transitions, 706 flow [2023-08-26 15:46:17,562 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 263 places, 304 transitions, 706 flow [2023-08-26 15:46:17,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 263 places, 304 transitions, 706 flow [2023-08-26 15:46:18,027 INFO L124 PetriNetUnfolderBase]: 539/3020 cut-off events. [2023-08-26 15:46:18,027 INFO L125 PetriNetUnfolderBase]: For 525/525 co-relation queries the response was YES. [2023-08-26 15:46:18,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3518 conditions, 3020 events. 539/3020 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 21601 event pairs, 201 based on Foata normal form. 0/2393 useless extension candidates. Maximal degree in co-relation 1893. Up to 448 conditions per place. [2023-08-26 15:46:18,114 INFO L119 LiptonReduction]: Number of co-enabled transitions 57232 [2023-08-26 15:46:21,913 INFO L134 LiptonReduction]: Checked pairs total: 186449 [2023-08-26 15:46:21,914 INFO L136 LiptonReduction]: Total number of compositions: 194 [2023-08-26 15:46:21,915 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:46:21,915 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;@15afae3e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:46:21,915 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:46:21,947 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:46:21,947 INFO L124 PetriNetUnfolderBase]: 92/396 cut-off events. [2023-08-26 15:46:21,947 INFO L125 PetriNetUnfolderBase]: For 129/129 co-relation queries the response was YES. [2023-08-26 15:46:21,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:46:21,948 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:46:21,948 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:46:21,948 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:46:21,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1237222944, now seen corresponding path program 1 times [2023-08-26 15:46:21,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:46:21,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695976687] [2023-08-26 15:46:21,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:46:21,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:46:21,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:46:21,982 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:46:22,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:46:22,021 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:46:22,021 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:46:22,021 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:46:22,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 15:46:22,021 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:46:22,022 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:46:22,022 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:46:22,022 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-08-26 15:46:22,048 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-26 15:46:22,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 288 places, 334 transitions, 788 flow [2023-08-26 15:46:23,019 INFO L124 PetriNetUnfolderBase]: 1127/5709 cut-off events. [2023-08-26 15:46:23,019 INFO L125 PetriNetUnfolderBase]: For 1136/1136 co-relation queries the response was YES. [2023-08-26 15:46:23,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6794 conditions, 5709 events. 1127/5709 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 48733 event pairs, 522 based on Foata normal form. 0/4555 useless extension candidates. Maximal degree in co-relation 3502. Up to 1024 conditions per place. [2023-08-26 15:46:23,078 INFO L82 GeneralOperation]: Start removeDead. Operand has 288 places, 334 transitions, 788 flow [2023-08-26 15:46:23,222 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 288 places, 334 transitions, 788 flow [2023-08-26 15:46:23,222 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:46:23,223 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 288 places, 334 transitions, 788 flow [2023-08-26 15:46:23,223 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 288 places, 334 transitions, 788 flow [2023-08-26 15:46:23,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 288 places, 334 transitions, 788 flow [2023-08-26 15:46:24,183 INFO L124 PetriNetUnfolderBase]: 1127/5709 cut-off events. [2023-08-26 15:46:24,183 INFO L125 PetriNetUnfolderBase]: For 1136/1136 co-relation queries the response was YES. [2023-08-26 15:46:24,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6794 conditions, 5709 events. 1127/5709 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 48733 event pairs, 522 based on Foata normal form. 0/4555 useless extension candidates. Maximal degree in co-relation 3502. Up to 1024 conditions per place. [2023-08-26 15:46:24,365 INFO L119 LiptonReduction]: Number of co-enabled transitions 72352 [2023-08-26 15:46:28,351 INFO L134 LiptonReduction]: Checked pairs total: 237826 [2023-08-26 15:46:28,351 INFO L136 LiptonReduction]: Total number of compositions: 211 [2023-08-26 15:46:28,353 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:46:28,353 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;@15afae3e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:46:28,353 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:46:28,397 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:46:28,397 INFO L124 PetriNetUnfolderBase]: 115/509 cut-off events. [2023-08-26 15:46:28,397 INFO L125 PetriNetUnfolderBase]: For 202/202 co-relation queries the response was YES. [2023-08-26 15:46:28,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:46:28,397 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:46:28,398 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:46:28,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:46:28,398 INFO L85 PathProgramCache]: Analyzing trace with hash 252745442, now seen corresponding path program 1 times [2023-08-26 15:46:28,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:46:28,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738991939] [2023-08-26 15:46:28,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:46:28,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:46:28,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:46:28,420 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:46:28,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:46:28,440 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:46:28,440 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:46:28,441 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:46:28,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 15:46:28,441 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:46:28,441 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:46:28,441 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:46:28,442 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-08-26 15:46:28,470 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-26 15:46:28,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 313 places, 364 transitions, 872 flow [2023-08-26 15:46:30,359 INFO L124 PetriNetUnfolderBase]: 2419/11150 cut-off events. [2023-08-26 15:46:30,359 INFO L125 PetriNetUnfolderBase]: For 2460/2460 co-relation queries the response was YES. [2023-08-26 15:46:30,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13527 conditions, 11150 events. 2419/11150 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 109647 event pairs, 1291 based on Foata normal form. 0/8957 useless extension candidates. Maximal degree in co-relation 6776. Up to 2304 conditions per place. [2023-08-26 15:46:30,474 INFO L82 GeneralOperation]: Start removeDead. Operand has 313 places, 364 transitions, 872 flow [2023-08-26 15:46:30,544 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 313 places, 364 transitions, 872 flow [2023-08-26 15:46:30,545 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:46:30,545 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 313 places, 364 transitions, 872 flow [2023-08-26 15:46:30,545 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 313 places, 364 transitions, 872 flow [2023-08-26 15:46:30,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 313 places, 364 transitions, 872 flow [2023-08-26 15:46:32,495 INFO L124 PetriNetUnfolderBase]: 2419/11150 cut-off events. [2023-08-26 15:46:32,495 INFO L125 PetriNetUnfolderBase]: For 2460/2460 co-relation queries the response was YES. [2023-08-26 15:46:32,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13527 conditions, 11150 events. 2419/11150 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 109647 event pairs, 1291 based on Foata normal form. 0/8957 useless extension candidates. Maximal degree in co-relation 6776. Up to 2304 conditions per place. [2023-08-26 15:46:32,945 INFO L119 LiptonReduction]: Number of co-enabled transitions 89208 [2023-08-26 15:46:37,030 INFO L134 LiptonReduction]: Checked pairs total: 293012 [2023-08-26 15:46:37,030 INFO L136 LiptonReduction]: Total number of compositions: 229 [2023-08-26 15:46:37,031 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:46:37,032 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;@15afae3e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:46:37,032 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:46:37,092 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:46:37,092 INFO L124 PetriNetUnfolderBase]: 152/674 cut-off events. [2023-08-26 15:46:37,092 INFO L125 PetriNetUnfolderBase]: For 309/309 co-relation queries the response was YES. [2023-08-26 15:46:37,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:46:37,092 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:46:37,092 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:46:37,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:46:37,093 INFO L85 PathProgramCache]: Analyzing trace with hash 2112133436, now seen corresponding path program 1 times [2023-08-26 15:46:37,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:46:37,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017337830] [2023-08-26 15:46:37,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:46:37,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:46:37,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:46:37,117 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:46:37,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:46:37,137 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:46:37,138 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:46:37,138 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:46:37,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 15:46:37,138 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:46:37,139 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:46:37,139 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:46:37,139 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-08-26 15:46:37,225 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2023-08-26 15:46:37,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 338 places, 394 transitions, 958 flow [2023-08-26 15:46:41,691 INFO L124 PetriNetUnfolderBase]: 5247/22223 cut-off events. [2023-08-26 15:46:41,691 INFO L125 PetriNetUnfolderBase]: For 5330/5330 co-relation queries the response was YES. [2023-08-26 15:46:41,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27429 conditions, 22223 events. 5247/22223 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 247819 event pairs, 3084 based on Foata normal form. 0/17967 useless extension candidates. Maximal degree in co-relation 13507. Up to 5120 conditions per place. [2023-08-26 15:46:41,937 INFO L82 GeneralOperation]: Start removeDead. Operand has 338 places, 394 transitions, 958 flow [2023-08-26 15:46:42,102 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 338 places, 394 transitions, 958 flow [2023-08-26 15:46:42,102 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:46:42,102 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 338 places, 394 transitions, 958 flow [2023-08-26 15:46:42,103 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 338 places, 394 transitions, 958 flow [2023-08-26 15:46:42,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 338 places, 394 transitions, 958 flow [2023-08-26 15:46:46,460 INFO L124 PetriNetUnfolderBase]: 5247/22223 cut-off events. [2023-08-26 15:46:46,460 INFO L125 PetriNetUnfolderBase]: For 5330/5330 co-relation queries the response was YES. [2023-08-26 15:46:46,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27429 conditions, 22223 events. 5247/22223 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 247819 event pairs, 3084 based on Foata normal form. 0/17967 useless extension candidates. Maximal degree in co-relation 13507. Up to 5120 conditions per place. [2023-08-26 15:46:47,497 INFO L119 LiptonReduction]: Number of co-enabled transitions 107800 [2023-08-26 15:46:51,522 INFO L134 LiptonReduction]: Checked pairs total: 368676 [2023-08-26 15:46:51,522 INFO L136 LiptonReduction]: Total number of compositions: 240 [2023-08-26 15:46:51,523 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:46:51,524 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;@15afae3e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:46:51,524 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:46:51,631 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:46:51,632 INFO L124 PetriNetUnfolderBase]: 246/983 cut-off events. [2023-08-26 15:46:51,632 INFO L125 PetriNetUnfolderBase]: For 469/469 co-relation queries the response was YES. [2023-08-26 15:46:51,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:46:51,632 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:46:51,632 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:46:51,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:46:51,632 INFO L85 PathProgramCache]: Analyzing trace with hash -684413866, now seen corresponding path program 1 times [2023-08-26 15:46:51,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:46:51,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039589437] [2023-08-26 15:46:51,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:46:51,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:46:51,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:46:51,656 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:46:51,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:46:51,677 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:46:51,677 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:46:51,677 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:46:51,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 15:46:51,677 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:46:51,678 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:46:51,678 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:46:51,678 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-08-26 15:46:51,707 INFO L144 ThreadInstanceAdder]: Constructed 11 joinOtherThreadTransitions. [2023-08-26 15:46:51,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 363 places, 424 transitions, 1046 flow [2023-08-26 15:47:01,285 INFO L124 PetriNetUnfolderBase]: 11403/44816 cut-off events. [2023-08-26 15:47:01,285 INFO L125 PetriNetUnfolderBase]: For 11539/11539 co-relation queries the response was YES. [2023-08-26 15:47:02,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56180 conditions, 44816 events. 11403/44816 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 1123. Compared 559342 event pairs, 7181 based on Foata normal form. 0/36449 useless extension candidates. Maximal degree in co-relation 27407. Up to 11264 conditions per place. [2023-08-26 15:47:02,147 INFO L82 GeneralOperation]: Start removeDead. Operand has 363 places, 424 transitions, 1046 flow [2023-08-26 15:47:02,853 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 363 places, 424 transitions, 1046 flow [2023-08-26 15:47:02,853 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:47:02,853 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 363 places, 424 transitions, 1046 flow [2023-08-26 15:47:02,854 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 363 places, 424 transitions, 1046 flow [2023-08-26 15:47:02,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 363 places, 424 transitions, 1046 flow [2023-08-26 15:47:12,466 INFO L124 PetriNetUnfolderBase]: 11403/44816 cut-off events. [2023-08-26 15:47:12,467 INFO L125 PetriNetUnfolderBase]: For 11539/11539 co-relation queries the response was YES. [2023-08-26 15:47:13,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56180 conditions, 44816 events. 11403/44816 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 1123. Compared 559342 event pairs, 7181 based on Foata normal form. 0/36449 useless extension candidates. Maximal degree in co-relation 27407. Up to 11264 conditions per place. [2023-08-26 15:47:14,978 INFO L119 LiptonReduction]: Number of co-enabled transitions 128128 [2023-08-26 15:47:19,201 INFO L134 LiptonReduction]: Checked pairs total: 437158 [2023-08-26 15:47:19,201 INFO L136 LiptonReduction]: Total number of compositions: 254 [2023-08-26 15:47:19,202 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:47:19,203 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;@15afae3e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:47:19,203 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:47:19,365 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:47:19,365 INFO L124 PetriNetUnfolderBase]: 362/1377 cut-off events. [2023-08-26 15:47:19,365 INFO L125 PetriNetUnfolderBase]: For 713/713 co-relation queries the response was YES. [2023-08-26 15:47:19,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:47:19,366 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:47:19,366 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:47:19,366 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:47:19,366 INFO L85 PathProgramCache]: Analyzing trace with hash 165023924, now seen corresponding path program 1 times [2023-08-26 15:47:19,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:47:19,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889034406] [2023-08-26 15:47:19,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:47:19,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:47:19,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:47:19,396 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:47:19,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:47:19,421 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:47:19,421 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:47:19,422 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:47:19,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 15:47:19,422 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:47:19,422 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:47:19,422 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:47:19,422 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-08-26 15:47:19,458 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2023-08-26 15:47:19,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 388 places, 454 transitions, 1136 flow [2023-08-26 15:47:40,244 INFO L124 PetriNetUnfolderBase]: 24727/90961 cut-off events. [2023-08-26 15:47:40,245 INFO L125 PetriNetUnfolderBase]: For 24928/24928 co-relation queries the response was YES. [2023-08-26 15:47:43,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115652 conditions, 90961 events. 24727/90961 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 2167. Compared 1237201 event pairs, 16398 based on Foata normal form. 0/74387 useless extension candidates. Maximal degree in co-relation 56156. Up to 24576 conditions per place. [2023-08-26 15:47:43,024 INFO L82 GeneralOperation]: Start removeDead. Operand has 388 places, 454 transitions, 1136 flow [2023-08-26 15:47:44,463 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 388 places, 454 transitions, 1136 flow [2023-08-26 15:47:44,463 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:47:44,463 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 388 places, 454 transitions, 1136 flow [2023-08-26 15:47:44,463 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 388 places, 454 transitions, 1136 flow [2023-08-26 15:47:44,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 388 places, 454 transitions, 1136 flow [2023-08-26 15:48:07,021 INFO L124 PetriNetUnfolderBase]: 24727/90961 cut-off events. [2023-08-26 15:48:07,021 INFO L125 PetriNetUnfolderBase]: For 24928/24928 co-relation queries the response was YES. [2023-08-26 15:48:09,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115652 conditions, 90961 events. 24727/90961 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 2167. Compared 1237201 event pairs, 16398 based on Foata normal form. 0/74387 useless extension candidates. Maximal degree in co-relation 56156. Up to 24576 conditions per place. [2023-08-26 15:48:16,316 INFO L119 LiptonReduction]: Number of co-enabled transitions 150192 [2023-08-26 15:48:21,169 INFO L134 LiptonReduction]: Checked pairs total: 521671 [2023-08-26 15:48:21,169 INFO L136 LiptonReduction]: Total number of compositions: 272 [2023-08-26 15:48:21,170 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:48:21,171 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;@15afae3e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:48:21,171 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:48:21,390 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:48:21,390 INFO L124 PetriNetUnfolderBase]: 586/2039 cut-off events. [2023-08-26 15:48:21,390 INFO L125 PetriNetUnfolderBase]: For 1089/1089 co-relation queries the response was YES. [2023-08-26 15:48:21,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:48:21,390 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 15:48:21,390 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:48:21,390 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:48:21,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1468781929, now seen corresponding path program 1 times [2023-08-26 15:48:21,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:48:21,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327782705] [2023-08-26 15:48:21,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:48:21,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:48:21,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:48:21,423 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:48:21,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:48:21,447 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:48:21,448 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:48:21,448 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:48:21,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 15:48:21,448 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:48:21,448 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:48:21,449 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:48:21,449 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-08-26 15:48:21,481 INFO L144 ThreadInstanceAdder]: Constructed 13 joinOtherThreadTransitions. [2023-08-26 15:48:21,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 413 places, 484 transitions, 1228 flow [2023-08-26 15:49:12,928 INFO L124 PetriNetUnfolderBase]: 53411/185234 cut-off events. [2023-08-26 15:49:12,928 INFO L125 PetriNetUnfolderBase]: For 53690/53690 co-relation queries the response was YES. [2023-08-26 15:49:22,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238613 conditions, 185234 events. 53411/185234 cut-off events. For 53690/53690 co-relation queries the response was YES. Maximal size of possible extension queue 4089. Compared 2719356 event pairs, 36879 based on Foata normal form. 0/152261 useless extension candidates. Maximal degree in co-relation 115626. Up to 53248 conditions per place. [2023-08-26 15:49:22,316 INFO L82 GeneralOperation]: Start removeDead. Operand has 413 places, 484 transitions, 1228 flow [2023-08-26 15:49:26,321 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 413 places, 484 transitions, 1228 flow [2023-08-26 15:49:26,322 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:49:26,322 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 413 places, 484 transitions, 1228 flow [2023-08-26 15:49:26,322 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 413 places, 484 transitions, 1228 flow [2023-08-26 15:49:26,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 413 places, 484 transitions, 1228 flow [2023-08-26 15:50:18,514 INFO L124 PetriNetUnfolderBase]: 53411/185234 cut-off events. [2023-08-26 15:50:18,515 INFO L125 PetriNetUnfolderBase]: For 53690/53690 co-relation queries the response was YES. [2023-08-26 15:50:25,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238613 conditions, 185234 events. 53411/185234 cut-off events. For 53690/53690 co-relation queries the response was YES. Maximal size of possible extension queue 4089. Compared 2719356 event pairs, 36879 based on Foata normal form. 0/152261 useless extension candidates. Maximal degree in co-relation 115626. Up to 53248 conditions per place. [2023-08-26 15:50:43,643 INFO L119 LiptonReduction]: Number of co-enabled transitions 173992 [2023-08-26 15:50:48,099 INFO L134 LiptonReduction]: Checked pairs total: 601586 [2023-08-26 15:50:48,100 INFO L136 LiptonReduction]: Total number of compositions: 289 [2023-08-26 15:50:48,101 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:50:48,101 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;@15afae3e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:50:48,101 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:50:48,367 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:50:48,367 INFO L124 PetriNetUnfolderBase]: 913/2934 cut-off events. [2023-08-26 15:50:48,367 INFO L125 PetriNetUnfolderBase]: For 1672/1672 co-relation queries the response was YES. [2023-08-26 15:50:48,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:50:48,367 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:50:48,367 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:50:48,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:50:48,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1380925907, now seen corresponding path program 1 times [2023-08-26 15:50:48,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:50:48,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170373791] [2023-08-26 15:50:48,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:50:48,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:50:48,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:50:48,395 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:50:48,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:50:48,421 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:50:48,422 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:50:48,422 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:50:48,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 15:50:48,422 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:50:48,423 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:50:48,423 WARN L233 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:50:48,423 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2023-08-26 15:50:48,458 INFO L144 ThreadInstanceAdder]: Constructed 14 joinOtherThreadTransitions. [2023-08-26 15:50:48,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 438 places, 514 transitions, 1322 flow