/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_27-funptr_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 15:49:20,890 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 15:49:20,970 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 15:49:20,974 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 15:49:20,975 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 15:49:21,000 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 15:49:21,001 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 15:49:21,001 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 15:49:21,002 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 15:49:21,005 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 15:49:21,005 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 15:49:21,006 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 15:49:21,006 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 15:49:21,007 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 15:49:21,007 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 15:49:21,007 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 15:49:21,007 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 15:49:21,008 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 15:49:21,008 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 15:49:21,008 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 15:49:21,008 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 15:49:21,009 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 15:49:21,009 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 15:49:21,010 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 15:49:21,010 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 15:49:21,010 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 15:49:21,010 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 15:49:21,011 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:49:21,011 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 15:49:21,011 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 15:49:21,012 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 15:49:21,012 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 15:49:21,012 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 15:49:21,012 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 15:49:21,012 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 15:49:21,013 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 15:49:21,298 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 15:49:21,324 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 15:49:21,326 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 15:49:21,328 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 15:49:21,328 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 15:49:21,329 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_27-funptr_racing.i [2023-08-26 15:49:22,520 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 15:49:22,844 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 15:49:22,844 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_27-funptr_racing.i [2023-08-26 15:49:22,866 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b78d40a12/3dd24c2b668e4d3487eeb81706bfcd74/FLAGba324fea7 [2023-08-26 15:49:22,880 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b78d40a12/3dd24c2b668e4d3487eeb81706bfcd74 [2023-08-26 15:49:22,884 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 15:49:22,885 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 15:49:22,889 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 15:49:22,889 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 15:49:22,892 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 15:49:22,892 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:49:22" (1/1) ... [2023-08-26 15:49:22,893 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d15d7c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:49:22, skipping insertion in model container [2023-08-26 15:49:22,893 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:49:22" (1/1) ... [2023-08-26 15:49:22,944 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 15:49:23,357 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:49:23,379 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 15:49:23,395 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 15:49:23,396 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 15:49:23,421 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [736] [2023-08-26 15:49:23,440 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:49:23,489 WARN L669 CHandler]: The function g is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 15:49:23,494 INFO L206 MainTranslator]: Completed translation [2023-08-26 15:49:23,494 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:49:23 WrapperNode [2023-08-26 15:49:23,494 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 15:49:23,495 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 15:49:23,495 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 15:49:23,495 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 15:49:23,501 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:49:23" (1/1) ... [2023-08-26 15:49:23,517 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:49:23" (1/1) ... [2023-08-26 15:49:23,538 INFO L138 Inliner]: procedures = 273, calls = 44, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 153 [2023-08-26 15:49:23,538 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 15:49:23,539 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 15:49:23,539 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 15:49:23,539 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 15:49:23,547 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:49:23" (1/1) ... [2023-08-26 15:49:23,547 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:49:23" (1/1) ... [2023-08-26 15:49:23,566 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:49:23" (1/1) ... [2023-08-26 15:49:23,566 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:49:23" (1/1) ... [2023-08-26 15:49:23,573 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:49:23" (1/1) ... [2023-08-26 15:49:23,588 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:49:23" (1/1) ... [2023-08-26 15:49:23,590 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:49:23" (1/1) ... [2023-08-26 15:49:23,591 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:49:23" (1/1) ... [2023-08-26 15:49:23,594 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 15:49:23,594 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 15:49:23,594 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 15:49:23,595 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 15:49:23,595 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:49:23" (1/1) ... [2023-08-26 15:49:23,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:49:23,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:49:23,632 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 15:49:23,636 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 15:49:23,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 15:49:23,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 15:49:23,658 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 15:49:23,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 15:49:23,659 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 15:49:23,659 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 15:49:23,659 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-26 15:49:23,659 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-26 15:49:23,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 15:49:23,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 15:49:23,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 15:49:23,660 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 15:49:23,815 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 15:49:23,816 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 15:49:24,050 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 15:49:24,056 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 15:49:24,057 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-08-26 15:49:24,059 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:49:24 BoogieIcfgContainer [2023-08-26 15:49:24,059 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 15:49:24,061 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 15:49:24,061 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 15:49:24,063 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 15:49:24,063 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 03:49:22" (1/3) ... [2023-08-26 15:49:24,064 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@874f86e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:49:24, skipping insertion in model container [2023-08-26 15:49:24,064 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:49:23" (2/3) ... [2023-08-26 15:49:24,064 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@874f86e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:49:24, skipping insertion in model container [2023-08-26 15:49:24,065 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:49:24" (3/3) ... [2023-08-26 15:49:24,066 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_27-funptr_racing.i [2023-08-26 15:49:24,098 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 15:49:24,099 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2023-08-26 15:49:24,099 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 15:49:24,170 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-26 15:49:24,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 155 transitions, 318 flow [2023-08-26 15:49:24,259 INFO L124 PetriNetUnfolderBase]: 26/202 cut-off events. [2023-08-26 15:49:24,259 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 15:49:24,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 202 events. 26/202 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 592 event pairs, 0 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 114. Up to 4 conditions per place. [2023-08-26 15:49:24,266 INFO L82 GeneralOperation]: Start removeDead. Operand has 138 places, 155 transitions, 318 flow [2023-08-26 15:49:24,272 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 150 transitions, 305 flow [2023-08-26 15:49:24,274 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:49:24,283 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 134 places, 150 transitions, 305 flow [2023-08-26 15:49:24,289 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 134 places, 150 transitions, 305 flow [2023-08-26 15:49:24,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 150 transitions, 305 flow [2023-08-26 15:49:24,353 INFO L124 PetriNetUnfolderBase]: 25/197 cut-off events. [2023-08-26 15:49:24,354 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:49:24,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 197 events. 25/197 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 571 event pairs, 0 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 114. Up to 4 conditions per place. [2023-08-26 15:49:24,360 INFO L119 LiptonReduction]: Number of co-enabled transitions 6572 [2023-08-26 15:49:27,683 INFO L134 LiptonReduction]: Checked pairs total: 12714 [2023-08-26 15:49:27,683 INFO L136 LiptonReduction]: Total number of compositions: 126 [2023-08-26 15:49:27,695 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:49:27,700 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;@60fef853, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:49:27,700 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:49:27,704 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:49:27,704 INFO L124 PetriNetUnfolderBase]: 0/16 cut-off events. [2023-08-26 15:49:27,704 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:49:27,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:49:27,705 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-26 15:49:27,705 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:49:27,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:49:27,709 INFO L85 PathProgramCache]: Analyzing trace with hash 917734824, now seen corresponding path program 1 times [2023-08-26 15:49:27,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:49:27,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191031340] [2023-08-26 15:49:27,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:49:27,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:49:27,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:49:27,829 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:49:27,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:49:27,875 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:49:27,877 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:49:27,878 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:49:27,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 15:49:27,879 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:49:27,881 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:49:27,882 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:49:27,882 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-26 15:49:27,909 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 15:49:27,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 219 transitions, 456 flow [2023-08-26 15:49:27,953 INFO L124 PetriNetUnfolderBase]: 48/340 cut-off events. [2023-08-26 15:49:27,953 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 15:49:27,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 354 conditions, 340 events. 48/340 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1239 event pairs, 0 based on Foata normal form. 0/271 useless extension candidates. Maximal degree in co-relation 204. Up to 8 conditions per place. [2023-08-26 15:49:27,957 INFO L82 GeneralOperation]: Start removeDead. Operand has 190 places, 219 transitions, 456 flow [2023-08-26 15:49:27,960 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 190 places, 219 transitions, 456 flow [2023-08-26 15:49:27,960 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:49:27,960 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 190 places, 219 transitions, 456 flow [2023-08-26 15:49:27,960 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 190 places, 219 transitions, 456 flow [2023-08-26 15:49:27,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 219 transitions, 456 flow [2023-08-26 15:49:27,998 INFO L124 PetriNetUnfolderBase]: 48/340 cut-off events. [2023-08-26 15:49:27,998 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 15:49:28,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 354 conditions, 340 events. 48/340 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1239 event pairs, 0 based on Foata normal form. 0/271 useless extension candidates. Maximal degree in co-relation 204. Up to 8 conditions per place. [2023-08-26 15:49:28,014 INFO L119 LiptonReduction]: Number of co-enabled transitions 22196 [2023-08-26 15:49:31,427 INFO L134 LiptonReduction]: Checked pairs total: 59567 [2023-08-26 15:49:31,428 INFO L136 LiptonReduction]: Total number of compositions: 156 [2023-08-26 15:49:31,432 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:49:31,435 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;@60fef853, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:49:31,435 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:49:31,442 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:49:31,443 INFO L124 PetriNetUnfolderBase]: 12/77 cut-off events. [2023-08-26 15:49:31,443 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 15:49:31,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:49:31,444 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-26 15:49:31,445 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:49:31,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:49:31,445 INFO L85 PathProgramCache]: Analyzing trace with hash 95399433, now seen corresponding path program 1 times [2023-08-26 15:49:31,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:49:31,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021255532] [2023-08-26 15:49:31,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:49:31,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:49:31,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:49:31,508 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:49:31,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:49:31,551 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:49:31,551 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:49:31,551 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:49:31,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 15:49:31,552 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:49:31,552 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:49:31,552 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:49:31,553 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-26 15:49:31,580 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-26 15:49:31,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 242 places, 283 transitions, 596 flow [2023-08-26 15:49:31,667 INFO L124 PetriNetUnfolderBase]: 75/515 cut-off events. [2023-08-26 15:49:31,668 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 15:49:31,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 543 conditions, 515 events. 75/515 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2075 event pairs, 1 based on Foata normal form. 0/408 useless extension candidates. Maximal degree in co-relation 348. Up to 16 conditions per place. [2023-08-26 15:49:31,676 INFO L82 GeneralOperation]: Start removeDead. Operand has 242 places, 283 transitions, 596 flow [2023-08-26 15:49:31,680 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 242 places, 283 transitions, 596 flow [2023-08-26 15:49:31,681 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:49:31,681 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 242 places, 283 transitions, 596 flow [2023-08-26 15:49:31,681 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 242 places, 283 transitions, 596 flow [2023-08-26 15:49:31,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 242 places, 283 transitions, 596 flow [2023-08-26 15:49:31,755 INFO L124 PetriNetUnfolderBase]: 75/515 cut-off events. [2023-08-26 15:49:31,755 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 15:49:31,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 543 conditions, 515 events. 75/515 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2075 event pairs, 1 based on Foata normal form. 0/408 useless extension candidates. Maximal degree in co-relation 348. Up to 16 conditions per place. [2023-08-26 15:49:31,782 INFO L119 LiptonReduction]: Number of co-enabled transitions 45384 [2023-08-26 15:49:35,373 INFO L134 LiptonReduction]: Checked pairs total: 131029 [2023-08-26 15:49:35,373 INFO L136 LiptonReduction]: Total number of compositions: 193 [2023-08-26 15:49:35,377 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:49:35,378 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;@60fef853, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:49:35,379 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:49:35,388 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:49:35,389 INFO L124 PetriNetUnfolderBase]: 24/127 cut-off events. [2023-08-26 15:49:35,389 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-26 15:49:35,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:49:35,389 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-26 15:49:35,389 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:49:35,390 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:49:35,390 INFO L85 PathProgramCache]: Analyzing trace with hash 2147140308, now seen corresponding path program 1 times [2023-08-26 15:49:35,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:49:35,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382374637] [2023-08-26 15:49:35,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:49:35,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:49:35,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:49:35,446 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:49:35,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:49:35,491 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:49:35,491 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:49:35,491 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:49:35,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 15:49:35,491 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:49:35,492 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:49:35,492 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:49:35,492 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-26 15:49:35,529 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-26 15:49:35,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 294 places, 347 transitions, 738 flow [2023-08-26 15:49:35,645 INFO L124 PetriNetUnfolderBase]: 114/766 cut-off events. [2023-08-26 15:49:35,646 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 15:49:35,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 821 conditions, 766 events. 114/766 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3410 event pairs, 6 based on Foata normal form. 0/605 useless extension candidates. Maximal degree in co-relation 535. Up to 32 conditions per place. [2023-08-26 15:49:35,661 INFO L82 GeneralOperation]: Start removeDead. Operand has 294 places, 347 transitions, 738 flow [2023-08-26 15:49:35,669 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 294 places, 347 transitions, 738 flow [2023-08-26 15:49:35,669 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:49:35,670 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 294 places, 347 transitions, 738 flow [2023-08-26 15:49:35,670 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 294 places, 347 transitions, 738 flow [2023-08-26 15:49:35,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 294 places, 347 transitions, 738 flow [2023-08-26 15:49:35,777 INFO L124 PetriNetUnfolderBase]: 114/766 cut-off events. [2023-08-26 15:49:35,777 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 15:49:35,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 821 conditions, 766 events. 114/766 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3410 event pairs, 6 based on Foata normal form. 0/605 useless extension candidates. Maximal degree in co-relation 535. Up to 32 conditions per place. [2023-08-26 15:49:35,821 INFO L119 LiptonReduction]: Number of co-enabled transitions 76632 [2023-08-26 15:49:39,344 INFO L134 LiptonReduction]: Checked pairs total: 229687 [2023-08-26 15:49:39,344 INFO L136 LiptonReduction]: Total number of compositions: 225 [2023-08-26 15:49:39,346 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:49:39,347 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;@60fef853, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:49:39,347 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:49:39,362 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:49:39,362 INFO L124 PetriNetUnfolderBase]: 48/204 cut-off events. [2023-08-26 15:49:39,362 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 15:49:39,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:49:39,363 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-26 15:49:39,363 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:49:39,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:49:39,363 INFO L85 PathProgramCache]: Analyzing trace with hash 42322042, now seen corresponding path program 1 times [2023-08-26 15:49:39,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:49:39,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580379381] [2023-08-26 15:49:39,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:49:39,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:49:39,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:49:39,436 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:49:39,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:49:39,467 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:49:39,467 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:49:39,467 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:49:39,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 15:49:39,468 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:49:39,468 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:49:39,468 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:49:39,468 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-26 15:49:39,512 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-26 15:49:39,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 346 places, 411 transitions, 882 flow [2023-08-26 15:49:39,714 INFO L124 PetriNetUnfolderBase]: 181/1173 cut-off events. [2023-08-26 15:49:39,714 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-26 15:49:39,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1284 conditions, 1173 events. 181/1173 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5981 event pairs, 23 based on Foata normal form. 0/926 useless extension candidates. Maximal degree in co-relation 811. Up to 80 conditions per place. [2023-08-26 15:49:39,737 INFO L82 GeneralOperation]: Start removeDead. Operand has 346 places, 411 transitions, 882 flow [2023-08-26 15:49:39,750 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 346 places, 411 transitions, 882 flow [2023-08-26 15:49:39,751 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:49:39,751 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 346 places, 411 transitions, 882 flow [2023-08-26 15:49:39,751 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 346 places, 411 transitions, 882 flow [2023-08-26 15:49:39,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 346 places, 411 transitions, 882 flow [2023-08-26 15:49:39,935 INFO L124 PetriNetUnfolderBase]: 181/1173 cut-off events. [2023-08-26 15:49:39,936 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-26 15:49:39,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1284 conditions, 1173 events. 181/1173 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5981 event pairs, 23 based on Foata normal form. 0/926 useless extension candidates. Maximal degree in co-relation 811. Up to 80 conditions per place. [2023-08-26 15:49:40,025 INFO L119 LiptonReduction]: Number of co-enabled transitions 115940 [2023-08-26 15:49:43,947 INFO L134 LiptonReduction]: Checked pairs total: 354936 [2023-08-26 15:49:43,948 INFO L136 LiptonReduction]: Total number of compositions: 264 [2023-08-26 15:49:43,950 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:49:43,951 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;@60fef853, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:49:43,951 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:49:43,977 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:49:43,978 INFO L124 PetriNetUnfolderBase]: 60/260 cut-off events. [2023-08-26 15:49:43,978 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-26 15:49:43,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:49:43,978 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:49:43,978 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:49:43,979 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:49:43,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1749263978, now seen corresponding path program 1 times [2023-08-26 15:49:43,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:49:43,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190398591] [2023-08-26 15:49:43,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:49:43,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:49:44,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:49:44,031 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:49:44,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:49:44,068 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:49:44,069 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:49:44,069 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:49:44,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 15:49:44,069 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:49:44,070 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:49:44,070 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:49:44,070 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-26 15:49:44,114 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2023-08-26 15:49:44,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 398 places, 475 transitions, 1028 flow [2023-08-26 15:49:44,505 INFO L124 PetriNetUnfolderBase]: 312/1900 cut-off events. [2023-08-26 15:49:44,506 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-08-26 15:49:44,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2132 conditions, 1900 events. 312/1900 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 11463 event pairs, 72 based on Foata normal form. 0/1503 useless extension candidates. Maximal degree in co-relation 1272. Up to 192 conditions per place. [2023-08-26 15:49:44,544 INFO L82 GeneralOperation]: Start removeDead. Operand has 398 places, 475 transitions, 1028 flow [2023-08-26 15:49:44,570 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 398 places, 475 transitions, 1028 flow [2023-08-26 15:49:44,570 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:49:44,570 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 398 places, 475 transitions, 1028 flow [2023-08-26 15:49:44,571 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 398 places, 475 transitions, 1028 flow [2023-08-26 15:49:44,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 398 places, 475 transitions, 1028 flow [2023-08-26 15:49:44,967 INFO L124 PetriNetUnfolderBase]: 312/1900 cut-off events. [2023-08-26 15:49:44,968 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-08-26 15:49:45,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2132 conditions, 1900 events. 312/1900 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 11463 event pairs, 72 based on Foata normal form. 0/1503 useless extension candidates. Maximal degree in co-relation 1272. Up to 192 conditions per place. [2023-08-26 15:49:45,127 INFO L119 LiptonReduction]: Number of co-enabled transitions 163308 [2023-08-26 15:49:49,334 INFO L134 LiptonReduction]: Checked pairs total: 505473 [2023-08-26 15:49:49,334 INFO L136 LiptonReduction]: Total number of compositions: 295 [2023-08-26 15:49:49,336 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:49:49,336 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;@60fef853, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:49:49,336 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:49:49,365 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:49:49,366 INFO L124 PetriNetUnfolderBase]: 78/334 cut-off events. [2023-08-26 15:49:49,366 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2023-08-26 15:49:49,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:49:49,366 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:49:49,366 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:49:49,366 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:49:49,366 INFO L85 PathProgramCache]: Analyzing trace with hash 603380436, now seen corresponding path program 1 times [2023-08-26 15:49:49,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:49:49,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590438528] [2023-08-26 15:49:49,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:49:49,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:49:49,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:49:49,405 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:49:49,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:49:49,449 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:49:49,450 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:49:49,450 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:49:49,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 15:49:49,453 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:49:49,454 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:49:49,454 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:49:49,454 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-26 15:49:49,496 INFO L144 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2023-08-26 15:49:49,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 450 places, 539 transitions, 1176 flow [2023-08-26 15:49:50,209 INFO L124 PetriNetUnfolderBase]: 587/3283 cut-off events. [2023-08-26 15:49:50,210 INFO L125 PetriNetUnfolderBase]: For 525/525 co-relation queries the response was YES. [2023-08-26 15:49:50,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3781 conditions, 3283 events. 587/3283 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 23132 event pairs, 201 based on Foata normal form. 0/2608 useless extension candidates. Maximal degree in co-relation 2118. Up to 448 conditions per place. [2023-08-26 15:49:50,304 INFO L82 GeneralOperation]: Start removeDead. Operand has 450 places, 539 transitions, 1176 flow [2023-08-26 15:49:50,340 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 450 places, 539 transitions, 1176 flow [2023-08-26 15:49:50,341 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:49:50,341 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 450 places, 539 transitions, 1176 flow [2023-08-26 15:49:50,341 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 450 places, 539 transitions, 1176 flow [2023-08-26 15:49:50,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 450 places, 539 transitions, 1176 flow [2023-08-26 15:49:51,050 INFO L124 PetriNetUnfolderBase]: 587/3283 cut-off events. [2023-08-26 15:49:51,050 INFO L125 PetriNetUnfolderBase]: For 525/525 co-relation queries the response was YES. [2023-08-26 15:49:51,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3781 conditions, 3283 events. 587/3283 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 23132 event pairs, 201 based on Foata normal form. 0/2608 useless extension candidates. Maximal degree in co-relation 2118. Up to 448 conditions per place. [2023-08-26 15:49:51,324 INFO L119 LiptonReduction]: Number of co-enabled transitions 218736 [2023-08-26 15:49:56,216 INFO L134 LiptonReduction]: Checked pairs total: 695208 [2023-08-26 15:49:56,216 INFO L136 LiptonReduction]: Total number of compositions: 334 [2023-08-26 15:49:56,217 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:49:56,217 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;@60fef853, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:49:56,218 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:49:56,246 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:49:56,246 INFO L124 PetriNetUnfolderBase]: 100/421 cut-off events. [2023-08-26 15:49:56,246 INFO L125 PetriNetUnfolderBase]: For 97/97 co-relation queries the response was YES. [2023-08-26 15:49:56,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:49:56,246 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:49:56,247 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:49:56,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:49:56,247 INFO L85 PathProgramCache]: Analyzing trace with hash 171380798, now seen corresponding path program 1 times [2023-08-26 15:49:56,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:49:56,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947136888] [2023-08-26 15:49:56,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:49:56,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:49:56,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:49:56,289 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:49:56,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:49:56,313 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:49:56,313 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:49:56,313 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:49:56,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 15:49:56,314 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:49:56,314 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:49:56,314 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:49:56,314 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-08-26 15:49:56,353 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-26 15:49:56,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 502 places, 603 transitions, 1326 flow [2023-08-26 15:49:57,929 INFO L124 PetriNetUnfolderBase]: 1182/6010 cut-off events. [2023-08-26 15:49:57,929 INFO L125 PetriNetUnfolderBase]: For 1136/1136 co-relation queries the response was YES. [2023-08-26 15:49:58,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7095 conditions, 6010 events. 1182/6010 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 49878 event pairs, 522 based on Foata normal form. 0/4801 useless extension candidates. Maximal degree in co-relation 3765. Up to 1024 conditions per place. [2023-08-26 15:49:58,051 INFO L82 GeneralOperation]: Start removeDead. Operand has 502 places, 603 transitions, 1326 flow [2023-08-26 15:49:58,111 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 502 places, 603 transitions, 1326 flow [2023-08-26 15:49:58,111 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:49:58,111 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 502 places, 603 transitions, 1326 flow [2023-08-26 15:49:58,111 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 502 places, 603 transitions, 1326 flow [2023-08-26 15:49:58,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 502 places, 603 transitions, 1326 flow [2023-08-26 15:49:59,578 INFO L124 PetriNetUnfolderBase]: 1182/6010 cut-off events. [2023-08-26 15:49:59,579 INFO L125 PetriNetUnfolderBase]: For 1136/1136 co-relation queries the response was YES. [2023-08-26 15:49:59,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7095 conditions, 6010 events. 1182/6010 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 49878 event pairs, 522 based on Foata normal form. 0/4801 useless extension candidates. Maximal degree in co-relation 3765. Up to 1024 conditions per place. [2023-08-26 15:50:00,096 INFO L119 LiptonReduction]: Number of co-enabled transitions 282224 [2023-08-26 15:50:05,159 INFO L134 LiptonReduction]: Checked pairs total: 891449 [2023-08-26 15:50:05,159 INFO L136 LiptonReduction]: Total number of compositions: 366 [2023-08-26 15:50:05,161 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:50:05,161 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;@60fef853, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:50:05,161 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:50:05,230 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:50:05,230 INFO L124 PetriNetUnfolderBase]: 128/528 cut-off events. [2023-08-26 15:50:05,230 INFO L125 PetriNetUnfolderBase]: For 147/147 co-relation queries the response was YES. [2023-08-26 15:50:05,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:50:05,230 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:50:05,231 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:50:05,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:50:05,231 INFO L85 PathProgramCache]: Analyzing trace with hash -659084751, now seen corresponding path program 1 times [2023-08-26 15:50:05,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:50:05,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419959694] [2023-08-26 15:50:05,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:50:05,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:50:05,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:50:05,255 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:50:05,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:50:05,284 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:50:05,285 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:50:05,285 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:50:05,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 15:50:05,285 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:50:05,287 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:50:05,287 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:50:05,287 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-08-26 15:50:05,332 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-26 15:50:05,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 554 places, 667 transitions, 1478 flow [2023-08-26 15:50:08,420 INFO L124 PetriNetUnfolderBase]: 2481/11489 cut-off events. [2023-08-26 15:50:08,421 INFO L125 PetriNetUnfolderBase]: For 2460/2460 co-relation queries the response was YES. [2023-08-26 15:50:08,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13866 conditions, 11489 events. 2481/11489 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 111815 event pairs, 1291 based on Foata normal form. 0/9234 useless extension candidates. Maximal degree in co-relation 7077. Up to 2304 conditions per place. [2023-08-26 15:50:08,846 INFO L82 GeneralOperation]: Start removeDead. Operand has 554 places, 667 transitions, 1478 flow [2023-08-26 15:50:08,985 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 554 places, 667 transitions, 1478 flow [2023-08-26 15:50:08,985 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:50:08,985 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 554 places, 667 transitions, 1478 flow [2023-08-26 15:50:08,986 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 554 places, 667 transitions, 1478 flow [2023-08-26 15:50:08,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 554 places, 667 transitions, 1478 flow [2023-08-26 15:50:11,927 INFO L124 PetriNetUnfolderBase]: 2481/11489 cut-off events. [2023-08-26 15:50:11,927 INFO L125 PetriNetUnfolderBase]: For 2460/2460 co-relation queries the response was YES. [2023-08-26 15:50:12,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13866 conditions, 11489 events. 2481/11489 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 111815 event pairs, 1291 based on Foata normal form. 0/9234 useless extension candidates. Maximal degree in co-relation 7077. Up to 2304 conditions per place. [2023-08-26 15:50:13,106 INFO L119 LiptonReduction]: Number of co-enabled transitions 353772 [2023-08-26 15:50:18,467 INFO L134 LiptonReduction]: Checked pairs total: 1129455 [2023-08-26 15:50:18,467 INFO L136 LiptonReduction]: Total number of compositions: 409 [2023-08-26 15:50:18,469 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:50:18,470 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;@60fef853, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:50:18,470 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:50:18,523 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:50:18,524 INFO L124 PetriNetUnfolderBase]: 160/653 cut-off events. [2023-08-26 15:50:18,524 INFO L125 PetriNetUnfolderBase]: For 215/215 co-relation queries the response was YES. [2023-08-26 15:50:18,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:50:18,524 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:50:18,524 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:50:18,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:50:18,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1893189641, now seen corresponding path program 1 times [2023-08-26 15:50:18,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:50:18,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411537701] [2023-08-26 15:50:18,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:50:18,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:50:18,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:50:18,548 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:50:18,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:50:18,569 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:50:18,569 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:50:18,569 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:50:18,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 15:50:18,570 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:50:18,570 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:50:18,570 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:50:18,570 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-08-26 15:50:18,613 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2023-08-26 15:50:18,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 606 places, 731 transitions, 1632 flow [2023-08-26 15:50:25,442 INFO L124 PetriNetUnfolderBase]: 5316/22600 cut-off events. [2023-08-26 15:50:25,442 INFO L125 PetriNetUnfolderBase]: For 5330/5330 co-relation queries the response was YES. [2023-08-26 15:50:26,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27806 conditions, 22600 events. 5316/22600 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 246358 event pairs, 3084 based on Foata normal form. 0/18275 useless extension candidates. Maximal degree in co-relation 13846. Up to 5120 conditions per place. [2023-08-26 15:50:26,137 INFO L82 GeneralOperation]: Start removeDead. Operand has 606 places, 731 transitions, 1632 flow [2023-08-26 15:50:26,476 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 606 places, 731 transitions, 1632 flow [2023-08-26 15:50:26,476 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:50:26,476 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 606 places, 731 transitions, 1632 flow [2023-08-26 15:50:26,476 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 606 places, 731 transitions, 1632 flow [2023-08-26 15:50:26,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 606 places, 731 transitions, 1632 flow [2023-08-26 15:50:33,519 INFO L124 PetriNetUnfolderBase]: 5316/22600 cut-off events. [2023-08-26 15:50:33,520 INFO L125 PetriNetUnfolderBase]: For 5330/5330 co-relation queries the response was YES. [2023-08-26 15:50:34,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27806 conditions, 22600 events. 5316/22600 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 246358 event pairs, 3084 based on Foata normal form. 0/18275 useless extension candidates. Maximal degree in co-relation 13846. Up to 5120 conditions per place. [2023-08-26 15:50:35,827 INFO L119 LiptonReduction]: Number of co-enabled transitions 433380 [2023-08-26 15:50:41,410 INFO L134 LiptonReduction]: Checked pairs total: 1381481 [2023-08-26 15:50:41,410 INFO L136 LiptonReduction]: Total number of compositions: 442 [2023-08-26 15:50:41,411 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:50:41,411 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;@60fef853, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:50:41,412 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:50:41,496 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:50:41,496 INFO L124 PetriNetUnfolderBase]: 195/801 cut-off events. [2023-08-26 15:50:41,496 INFO L125 PetriNetUnfolderBase]: For 308/308 co-relation queries the response was YES. [2023-08-26 15:50:41,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:50:41,496 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:50:41,496 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:50:41,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:50:41,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1604667048, now seen corresponding path program 1 times [2023-08-26 15:50:41,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:50:41,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255511737] [2023-08-26 15:50:41,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:50:41,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:50:41,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:50:41,521 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:50:41,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:50:41,548 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:50:41,549 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:50:41,549 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:50:41,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 15:50:41,549 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:50:41,550 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:50:41,550 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:50:41,550 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-08-26 15:50:41,598 INFO L144 ThreadInstanceAdder]: Constructed 11 joinOtherThreadTransitions. [2023-08-26 15:50:41,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 658 places, 795 transitions, 1788 flow [2023-08-26 15:50:56,944 INFO L124 PetriNetUnfolderBase]: 11479/45231 cut-off events. [2023-08-26 15:50:56,944 INFO L125 PetriNetUnfolderBase]: For 11539/11539 co-relation queries the response was YES. [2023-08-26 15:50:59,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56595 conditions, 45231 events. 11479/45231 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 1206. Compared 553160 event pairs, 7181 based on Foata normal form. 0/36788 useless extension candidates. Maximal degree in co-relation 27784. Up to 11264 conditions per place. [2023-08-26 15:50:59,268 INFO L82 GeneralOperation]: Start removeDead. Operand has 658 places, 795 transitions, 1788 flow [2023-08-26 15:51:00,183 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 658 places, 795 transitions, 1788 flow [2023-08-26 15:51:00,184 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:51:00,184 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 658 places, 795 transitions, 1788 flow [2023-08-26 15:51:00,184 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 658 places, 795 transitions, 1788 flow [2023-08-26 15:51:00,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 658 places, 795 transitions, 1788 flow [2023-08-26 15:51:15,592 INFO L124 PetriNetUnfolderBase]: 11479/45231 cut-off events. [2023-08-26 15:51:15,592 INFO L125 PetriNetUnfolderBase]: For 11539/11539 co-relation queries the response was YES. [2023-08-26 15:51:17,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56595 conditions, 45231 events. 11479/45231 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 1206. Compared 553160 event pairs, 7181 based on Foata normal form. 0/36788 useless extension candidates. Maximal degree in co-relation 27784. Up to 11264 conditions per place. [2023-08-26 15:51:21,922 INFO L119 LiptonReduction]: Number of co-enabled transitions 521048 [2023-08-26 15:51:28,036 INFO L134 LiptonReduction]: Checked pairs total: 1665321 [2023-08-26 15:51:28,036 INFO L136 LiptonReduction]: Total number of compositions: 479 [2023-08-26 15:51:28,038 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:51:28,038 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;@60fef853, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:51:28,038 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:51:28,146 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:51:28,147 INFO L124 PetriNetUnfolderBase]: 238/982 cut-off events. [2023-08-26 15:51:28,147 INFO L125 PetriNetUnfolderBase]: For 436/436 co-relation queries the response was YES. [2023-08-26 15:51:28,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:51:28,147 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:51:28,147 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:51:28,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:51:28,147 INFO L85 PathProgramCache]: Analyzing trace with hash 50115988, now seen corresponding path program 1 times [2023-08-26 15:51:28,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:51:28,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021936421] [2023-08-26 15:51:28,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:51:28,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:51:28,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:51:28,174 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:51:28,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:51:28,198 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:51:28,198 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:51:28,198 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:51:28,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 15:51:28,198 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:51:28,199 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:51:28,199 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:51:28,199 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-08-26 15:51:28,253 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2023-08-26 15:51:28,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 710 places, 859 transitions, 1946 flow [2023-08-26 15:52:02,211 INFO L124 PetriNetUnfolderBase]: 24810/91414 cut-off events. [2023-08-26 15:52:02,211 INFO L125 PetriNetUnfolderBase]: For 24928/24928 co-relation queries the response was YES. [2023-08-26 15:52:11,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116105 conditions, 91414 events. 24810/91414 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 2406. Compared 1223775 event pairs, 16398 based on Foata normal form. 0/74757 useless extension candidates. Maximal degree in co-relation 56571. Up to 24576 conditions per place. [2023-08-26 15:52:11,109 INFO L82 GeneralOperation]: Start removeDead. Operand has 710 places, 859 transitions, 1946 flow [2023-08-26 15:52:14,075 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 710 places, 859 transitions, 1946 flow [2023-08-26 15:52:14,075 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:52:14,075 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 710 places, 859 transitions, 1946 flow [2023-08-26 15:52:14,075 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 710 places, 859 transitions, 1946 flow [2023-08-26 15:52:14,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 710 places, 859 transitions, 1946 flow [2023-08-26 15:52:52,221 INFO L124 PetriNetUnfolderBase]: 24810/91414 cut-off events. [2023-08-26 15:52:52,222 INFO L125 PetriNetUnfolderBase]: For 24928/24928 co-relation queries the response was YES. [2023-08-26 15:53:00,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116105 conditions, 91414 events. 24810/91414 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 2406. Compared 1223775 event pairs, 16398 based on Foata normal form. 0/74757 useless extension candidates. Maximal degree in co-relation 56571. Up to 24576 conditions per place. [2023-08-26 15:53:11,785 INFO L119 LiptonReduction]: Number of co-enabled transitions 616776 [2023-08-26 15:53:18,370 INFO L134 LiptonReduction]: Checked pairs total: 2027089 [2023-08-26 15:53:18,370 INFO L136 LiptonReduction]: Total number of compositions: 518 [2023-08-26 15:53:18,371 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:53:18,372 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;@60fef853, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:53:18,372 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:53:18,516 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:53:18,516 INFO L124 PetriNetUnfolderBase]: 327/1283 cut-off events. [2023-08-26 15:53:18,516 INFO L125 PetriNetUnfolderBase]: For 613/613 co-relation queries the response was YES. [2023-08-26 15:53:18,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:53:18,516 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 15:53:18,517 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:53:18,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:53:18,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1901336248, now seen corresponding path program 1 times [2023-08-26 15:53:18,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:53:18,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673986746] [2023-08-26 15:53:18,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:53:18,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:53:18,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:53:18,546 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:53:18,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:53:18,572 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:53:18,573 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:53:18,573 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:53:18,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 15:53:18,573 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:53:18,574 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:53:18,574 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:53:18,574 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-08-26 15:53:18,634 INFO L144 ThreadInstanceAdder]: Constructed 13 joinOtherThreadTransitions. [2023-08-26 15:53:18,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 762 places, 923 transitions, 2106 flow