/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_41-trylock_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 15:52:38,976 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 15:52:39,061 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 15:52:39,065 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 15:52:39,066 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 15:52:39,097 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 15:52:39,098 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 15:52:39,098 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 15:52:39,099 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 15:52:39,102 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 15:52:39,102 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 15:52:39,103 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 15:52:39,103 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 15:52:39,104 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 15:52:39,105 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 15:52:39,105 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 15:52:39,105 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 15:52:39,105 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 15:52:39,105 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 15:52:39,106 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 15:52:39,106 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 15:52:39,107 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 15:52:39,107 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 15:52:39,108 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 15:52:39,108 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 15:52:39,108 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 15:52:39,108 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 15:52:39,109 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:52:39,109 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 15:52:39,109 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 15:52:39,110 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 15:52:39,110 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 15:52:39,110 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 15:52:39,110 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 15:52:39,111 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 15:52:39,111 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 15:52:39,444 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 15:52:39,459 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 15:52:39,461 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 15:52:39,462 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 15:52:39,462 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 15:52:39,463 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_41-trylock_racefree.i [2023-08-26 15:52:40,567 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 15:52:40,767 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 15:52:40,767 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_41-trylock_racefree.i [2023-08-26 15:52:40,779 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b27d3424/b4046db805864decbcd60f2967699815/FLAG332cd906b [2023-08-26 15:52:40,791 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b27d3424/b4046db805864decbcd60f2967699815 [2023-08-26 15:52:40,793 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 15:52:40,794 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 15:52:40,795 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 15:52:40,795 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 15:52:40,797 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 15:52:40,798 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:52:40" (1/1) ... [2023-08-26 15:52:40,799 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cf89247 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:52:40, skipping insertion in model container [2023-08-26 15:52:40,799 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:52:40" (1/1) ... [2023-08-26 15:52:40,834 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 15:52:41,119 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:52:41,133 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 15:52:41,162 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 15:52:41,164 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 15:52:41,192 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:52:41,226 INFO L206 MainTranslator]: Completed translation [2023-08-26 15:52:41,226 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:52:41 WrapperNode [2023-08-26 15:52:41,226 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 15:52:41,227 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 15:52:41,227 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 15:52:41,228 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 15:52:41,233 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:52:41" (1/1) ... [2023-08-26 15:52:41,245 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:52:41" (1/1) ... [2023-08-26 15:52:41,272 INFO L138 Inliner]: procedures = 171, calls = 31, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 82 [2023-08-26 15:52:41,272 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 15:52:41,274 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 15:52:41,274 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 15:52:41,274 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 15:52:41,282 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:52:41" (1/1) ... [2023-08-26 15:52:41,282 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:52:41" (1/1) ... [2023-08-26 15:52:41,297 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:52:41" (1/1) ... [2023-08-26 15:52:41,297 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:52:41" (1/1) ... [2023-08-26 15:52:41,302 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:52:41" (1/1) ... [2023-08-26 15:52:41,305 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:52:41" (1/1) ... [2023-08-26 15:52:41,307 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:52:41" (1/1) ... [2023-08-26 15:52:41,308 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:52:41" (1/1) ... [2023-08-26 15:52:41,325 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 15:52:41,326 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 15:52:41,326 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 15:52:41,326 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 15:52:41,327 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:52:41" (1/1) ... [2023-08-26 15:52:41,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:52:41,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:52:41,360 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 15:52:41,365 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 15:52:41,391 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 15:52:41,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 15:52:41,391 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 15:52:41,391 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 15:52:41,391 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 15:52:41,391 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-26 15:52:41,392 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-26 15:52:41,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 15:52:41,392 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexTryLock [2023-08-26 15:52:41,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 15:52:41,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 15:52:41,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 15:52:41,393 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 15:52:41,556 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 15:52:41,558 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 15:52:41,807 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 15:52:41,813 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 15:52:41,813 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-08-26 15:52:41,815 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:52:41 BoogieIcfgContainer [2023-08-26 15:52:41,815 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 15:52:41,817 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 15:52:41,817 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 15:52:41,820 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 15:52:41,823 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 03:52:40" (1/3) ... [2023-08-26 15:52:41,824 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@327e419 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:52:41, skipping insertion in model container [2023-08-26 15:52:41,824 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:52:41" (2/3) ... [2023-08-26 15:52:41,825 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@327e419 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:52:41, skipping insertion in model container [2023-08-26 15:52:41,825 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:52:41" (3/3) ... [2023-08-26 15:52:41,826 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_41-trylock_racefree.i [2023-08-26 15:52:41,841 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 15:52:41,842 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2023-08-26 15:52:41,842 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 15:52:41,913 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-26 15:52:41,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 113 transitions, 234 flow [2023-08-26 15:52:42,030 INFO L124 PetriNetUnfolderBase]: 23/160 cut-off events. [2023-08-26 15:52:42,031 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 15:52:42,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 160 events. 23/160 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 439 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 80. Up to 6 conditions per place. [2023-08-26 15:52:42,035 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 113 transitions, 234 flow [2023-08-26 15:52:42,041 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 97 places, 108 transitions, 221 flow [2023-08-26 15:52:42,045 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:52:42,060 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 97 places, 108 transitions, 221 flow [2023-08-26 15:52:42,062 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 97 places, 108 transitions, 221 flow [2023-08-26 15:52:42,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 108 transitions, 221 flow [2023-08-26 15:52:42,107 INFO L124 PetriNetUnfolderBase]: 22/155 cut-off events. [2023-08-26 15:52:42,107 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:52:42,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 155 events. 22/155 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 423 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 80. Up to 6 conditions per place. [2023-08-26 15:52:42,112 INFO L119 LiptonReduction]: Number of co-enabled transitions 2968 [2023-08-26 15:52:44,411 INFO L134 LiptonReduction]: Checked pairs total: 4396 [2023-08-26 15:52:44,411 INFO L136 LiptonReduction]: Total number of compositions: 89 [2023-08-26 15:52:44,422 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:52:44,427 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;@54aaf575, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:52:44,427 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:52:44,433 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:52:44,433 INFO L124 PetriNetUnfolderBase]: 6/33 cut-off events. [2023-08-26 15:52:44,433 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:52:44,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:52:44,434 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-26 15:52:44,434 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:52:44,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:52:44,438 INFO L85 PathProgramCache]: Analyzing trace with hash 91228594, now seen corresponding path program 1 times [2023-08-26 15:52:44,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:52:44,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079734483] [2023-08-26 15:52:44,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:52:44,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:52:44,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:52:44,551 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:52:44,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:52:44,595 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:52:44,596 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:52:44,597 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:52:44,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 15:52:44,599 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:52:44,601 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:52:44,602 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:52:44,602 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-26 15:52:44,618 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 15:52:44,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 143 transitions, 304 flow [2023-08-26 15:52:44,652 INFO L124 PetriNetUnfolderBase]: 40/264 cut-off events. [2023-08-26 15:52:44,652 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 15:52:44,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278 conditions, 264 events. 40/264 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 840 event pairs, 0 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 162. Up to 9 conditions per place. [2023-08-26 15:52:44,654 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 143 transitions, 304 flow [2023-08-26 15:52:44,656 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 126 places, 143 transitions, 304 flow [2023-08-26 15:52:44,656 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:52:44,656 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 126 places, 143 transitions, 304 flow [2023-08-26 15:52:44,657 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 126 places, 143 transitions, 304 flow [2023-08-26 15:52:44,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 143 transitions, 304 flow [2023-08-26 15:52:44,682 INFO L124 PetriNetUnfolderBase]: 40/264 cut-off events. [2023-08-26 15:52:44,683 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 15:52:44,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278 conditions, 264 events. 40/264 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 840 event pairs, 0 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 162. Up to 9 conditions per place. [2023-08-26 15:52:44,690 INFO L119 LiptonReduction]: Number of co-enabled transitions 8120 [2023-08-26 15:52:46,981 INFO L134 LiptonReduction]: Checked pairs total: 18224 [2023-08-26 15:52:46,981 INFO L136 LiptonReduction]: Total number of compositions: 106 [2023-08-26 15:52:46,984 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:52:46,985 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;@54aaf575, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:52:46,985 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:52:46,992 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:52:46,992 INFO L124 PetriNetUnfolderBase]: 15/73 cut-off events. [2023-08-26 15:52:46,992 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 15:52:46,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:52:46,993 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-26 15:52:46,993 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:52:46,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:52:46,994 INFO L85 PathProgramCache]: Analyzing trace with hash 303982657, now seen corresponding path program 1 times [2023-08-26 15:52:46,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:52:46,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238686778] [2023-08-26 15:52:46,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:52:46,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:52:47,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:52:47,024 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:52:47,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:52:47,057 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:52:47,057 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:52:47,057 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:52:47,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 15:52:47,058 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:52:47,058 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:52:47,059 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:52:47,059 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-26 15:52:47,080 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-26 15:52:47,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 173 transitions, 376 flow [2023-08-26 15:52:47,129 INFO L124 PetriNetUnfolderBase]: 62/405 cut-off events. [2023-08-26 15:52:47,129 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 15:52:47,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 433 conditions, 405 events. 62/405 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1446 event pairs, 1 based on Foata normal form. 0/311 useless extension candidates. Maximal degree in co-relation 272. Up to 16 conditions per place. [2023-08-26 15:52:47,132 INFO L82 GeneralOperation]: Start removeDead. Operand has 151 places, 173 transitions, 376 flow [2023-08-26 15:52:47,135 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 151 places, 173 transitions, 376 flow [2023-08-26 15:52:47,135 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:52:47,136 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 151 places, 173 transitions, 376 flow [2023-08-26 15:52:47,136 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 151 places, 173 transitions, 376 flow [2023-08-26 15:52:47,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 173 transitions, 376 flow [2023-08-26 15:52:47,177 INFO L124 PetriNetUnfolderBase]: 62/405 cut-off events. [2023-08-26 15:52:47,178 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 15:52:47,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 433 conditions, 405 events. 62/405 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1446 event pairs, 1 based on Foata normal form. 0/311 useless extension candidates. Maximal degree in co-relation 272. Up to 16 conditions per place. [2023-08-26 15:52:47,191 INFO L119 LiptonReduction]: Number of co-enabled transitions 14784 [2023-08-26 15:52:49,374 INFO L134 LiptonReduction]: Checked pairs total: 36218 [2023-08-26 15:52:49,374 INFO L136 LiptonReduction]: Total number of compositions: 118 [2023-08-26 15:52:49,376 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:52:49,377 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;@54aaf575, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:52:49,378 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:52:49,386 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:52:49,386 INFO L124 PetriNetUnfolderBase]: 28/118 cut-off events. [2023-08-26 15:52:49,386 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-26 15:52:49,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:52:49,386 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-26 15:52:49,386 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:52:49,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:52:49,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1246229909, now seen corresponding path program 1 times [2023-08-26 15:52:49,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:52:49,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052671095] [2023-08-26 15:52:49,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:52:49,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:52:49,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:52:49,445 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:52:49,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:52:49,499 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:52:49,499 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:52:49,499 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:52:49,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 15:52:49,500 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:52:49,500 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:52:49,500 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:52:49,501 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-26 15:52:49,534 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-26 15:52:49,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 203 transitions, 450 flow [2023-08-26 15:52:49,600 INFO L124 PetriNetUnfolderBase]: 96/622 cut-off events. [2023-08-26 15:52:49,600 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 15:52:49,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 677 conditions, 622 events. 96/622 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2553 event pairs, 6 based on Foata normal form. 0/479 useless extension candidates. Maximal degree in co-relation 425. Up to 32 conditions per place. [2023-08-26 15:52:49,606 INFO L82 GeneralOperation]: Start removeDead. Operand has 176 places, 203 transitions, 450 flow [2023-08-26 15:52:49,611 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 176 places, 203 transitions, 450 flow [2023-08-26 15:52:49,611 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:52:49,611 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 176 places, 203 transitions, 450 flow [2023-08-26 15:52:49,611 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 176 places, 203 transitions, 450 flow [2023-08-26 15:52:49,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 203 transitions, 450 flow [2023-08-26 15:52:49,670 INFO L124 PetriNetUnfolderBase]: 96/622 cut-off events. [2023-08-26 15:52:49,670 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 15:52:49,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 677 conditions, 622 events. 96/622 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2553 event pairs, 6 based on Foata normal form. 0/479 useless extension candidates. Maximal degree in co-relation 425. Up to 32 conditions per place. [2023-08-26 15:52:49,694 INFO L119 LiptonReduction]: Number of co-enabled transitions 23184 [2023-08-26 15:52:52,049 INFO L134 LiptonReduction]: Checked pairs total: 55998 [2023-08-26 15:52:52,049 INFO L136 LiptonReduction]: Total number of compositions: 133 [2023-08-26 15:52:52,051 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:52:52,052 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;@54aaf575, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:52:52,052 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:52:52,066 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:52:52,066 INFO L124 PetriNetUnfolderBase]: 44/177 cut-off events. [2023-08-26 15:52:52,066 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-08-26 15:52:52,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:52:52,066 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-26 15:52:52,066 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:52:52,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:52:52,067 INFO L85 PathProgramCache]: Analyzing trace with hash 938888246, now seen corresponding path program 1 times [2023-08-26 15:52:52,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:52:52,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789876210] [2023-08-26 15:52:52,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:52:52,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:52:52,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:52:52,107 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:52:52,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:52:52,152 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:52:52,153 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:52:52,153 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:52:52,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 15:52:52,153 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:52:52,154 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:52:52,154 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:52:52,154 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-26 15:52:52,185 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-26 15:52:52,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 201 places, 233 transitions, 526 flow [2023-08-26 15:52:52,313 INFO L124 PetriNetUnfolderBase]: 158/995 cut-off events. [2023-08-26 15:52:52,314 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-26 15:52:52,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1106 conditions, 995 events. 158/995 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4832 event pairs, 23 based on Foata normal form. 0/771 useless extension candidates. Maximal degree in co-relation 667. Up to 80 conditions per place. [2023-08-26 15:52:52,327 INFO L82 GeneralOperation]: Start removeDead. Operand has 201 places, 233 transitions, 526 flow [2023-08-26 15:52:52,335 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 201 places, 233 transitions, 526 flow [2023-08-26 15:52:52,336 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:52:52,336 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 201 places, 233 transitions, 526 flow [2023-08-26 15:52:52,336 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 201 places, 233 transitions, 526 flow [2023-08-26 15:52:52,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 201 places, 233 transitions, 526 flow [2023-08-26 15:52:52,451 INFO L124 PetriNetUnfolderBase]: 158/995 cut-off events. [2023-08-26 15:52:52,452 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-26 15:52:52,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1106 conditions, 995 events. 158/995 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4832 event pairs, 23 based on Foata normal form. 0/771 useless extension candidates. Maximal degree in co-relation 667. Up to 80 conditions per place. [2023-08-26 15:52:52,496 INFO L119 LiptonReduction]: Number of co-enabled transitions 33320 [2023-08-26 15:52:54,878 INFO L134 LiptonReduction]: Checked pairs total: 80680 [2023-08-26 15:52:54,878 INFO L136 LiptonReduction]: Total number of compositions: 148 [2023-08-26 15:52:54,880 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:52:54,881 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@54aaf575, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:52:54,881 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:52:54,898 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:52:54,898 INFO L124 PetriNetUnfolderBase]: 59/238 cut-off events. [2023-08-26 15:52:54,898 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-08-26 15:52:54,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:52:54,899 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:52:54,899 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:52:54,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:52:54,899 INFO L85 PathProgramCache]: Analyzing trace with hash 738816195, now seen corresponding path program 1 times [2023-08-26 15:52:54,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:52:54,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527115244] [2023-08-26 15:52:54,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:52:54,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:52:54,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:52:54,952 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:52:54,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:52:54,975 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:52:54,975 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:52:54,975 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:52:54,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 15:52:54,975 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:52:54,976 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:52:54,976 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:52:54,976 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-26 15:52:54,998 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2023-08-26 15:52:55,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 263 transitions, 604 flow [2023-08-26 15:52:55,274 INFO L124 PetriNetUnfolderBase]: 284/1688 cut-off events. [2023-08-26 15:52:55,274 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-08-26 15:52:55,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1920 conditions, 1688 events. 284/1688 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 10053 event pairs, 72 based on Foata normal form. 0/1319 useless extension candidates. Maximal degree in co-relation 1094. Up to 192 conditions per place. [2023-08-26 15:52:55,300 INFO L82 GeneralOperation]: Start removeDead. Operand has 226 places, 263 transitions, 604 flow [2023-08-26 15:52:55,317 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 226 places, 263 transitions, 604 flow [2023-08-26 15:52:55,317 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:52:55,317 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 226 places, 263 transitions, 604 flow [2023-08-26 15:52:55,318 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 226 places, 263 transitions, 604 flow [2023-08-26 15:52:55,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 263 transitions, 604 flow [2023-08-26 15:52:55,546 INFO L124 PetriNetUnfolderBase]: 284/1688 cut-off events. [2023-08-26 15:52:55,546 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-08-26 15:52:55,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1920 conditions, 1688 events. 284/1688 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 10053 event pairs, 72 based on Foata normal form. 0/1319 useless extension candidates. Maximal degree in co-relation 1094. Up to 192 conditions per place. [2023-08-26 15:52:55,641 INFO L119 LiptonReduction]: Number of co-enabled transitions 45192 [2023-08-26 15:52:58,147 INFO L134 LiptonReduction]: Checked pairs total: 127697 [2023-08-26 15:52:58,147 INFO L136 LiptonReduction]: Total number of compositions: 163 [2023-08-26 15:52:58,148 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:52:58,149 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;@54aaf575, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:52:58,149 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:52:58,170 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:52:58,170 INFO L124 PetriNetUnfolderBase]: 71/292 cut-off events. [2023-08-26 15:52:58,171 INFO L125 PetriNetUnfolderBase]: For 70/70 co-relation queries the response was YES. [2023-08-26 15:52:58,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:52:58,171 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:52:58,171 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:52:58,171 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:52:58,171 INFO L85 PathProgramCache]: Analyzing trace with hash 564800011, now seen corresponding path program 1 times [2023-08-26 15:52:58,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:52:58,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259301509] [2023-08-26 15:52:58,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:52:58,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:52:58,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:52:58,210 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:52:58,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:52:58,251 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:52:58,251 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:52:58,251 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:52:58,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 15:52:58,251 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:52:58,252 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:52:58,252 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:52:58,252 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-26 15:52:58,292 INFO L144 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2023-08-26 15:52:58,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 251 places, 293 transitions, 684 flow [2023-08-26 15:52:58,805 INFO L124 PetriNetUnfolderBase]: 554/3037 cut-off events. [2023-08-26 15:52:58,806 INFO L125 PetriNetUnfolderBase]: For 525/525 co-relation queries the response was YES. [2023-08-26 15:52:58,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3535 conditions, 3037 events. 554/3037 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 21768 event pairs, 201 based on Foata normal form. 0/2395 useless extension candidates. Maximal degree in co-relation 1906. Up to 448 conditions per place. [2023-08-26 15:52:58,861 INFO L82 GeneralOperation]: Start removeDead. Operand has 251 places, 293 transitions, 684 flow [2023-08-26 15:52:58,885 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 251 places, 293 transitions, 684 flow [2023-08-26 15:52:58,886 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:52:58,886 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 251 places, 293 transitions, 684 flow [2023-08-26 15:52:58,886 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 251 places, 293 transitions, 684 flow [2023-08-26 15:52:58,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 251 places, 293 transitions, 684 flow [2023-08-26 15:52:59,389 INFO L124 PetriNetUnfolderBase]: 554/3037 cut-off events. [2023-08-26 15:52:59,389 INFO L125 PetriNetUnfolderBase]: For 525/525 co-relation queries the response was YES. [2023-08-26 15:52:59,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3535 conditions, 3037 events. 554/3037 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 21768 event pairs, 201 based on Foata normal form. 0/2395 useless extension candidates. Maximal degree in co-relation 1906. Up to 448 conditions per place. [2023-08-26 15:52:59,490 INFO L119 LiptonReduction]: Number of co-enabled transitions 58800 [2023-08-26 15:53:01,978 INFO L134 LiptonReduction]: Checked pairs total: 167615 [2023-08-26 15:53:01,979 INFO L136 LiptonReduction]: Total number of compositions: 178 [2023-08-26 15:53:01,980 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:53:01,981 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;@54aaf575, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:53:01,981 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:53:02,019 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:53:02,019 INFO L124 PetriNetUnfolderBase]: 96/397 cut-off events. [2023-08-26 15:53:02,019 INFO L125 PetriNetUnfolderBase]: For 125/125 co-relation queries the response was YES. [2023-08-26 15:53:02,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:53:02,020 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:53:02,020 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:53:02,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:53:02,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1745414188, now seen corresponding path program 1 times [2023-08-26 15:53:02,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:53:02,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578721517] [2023-08-26 15:53:02,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:53:02,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:53:02,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:53:02,059 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:53:02,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:53:02,098 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:53:02,098 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:53:02,098 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:53:02,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 15:53:02,099 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:53:02,099 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:53:02,100 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:53:02,100 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-08-26 15:53:02,131 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-26 15:53:02,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 276 places, 323 transitions, 766 flow [2023-08-26 15:53:03,237 INFO L124 PetriNetUnfolderBase]: 1144/5730 cut-off events. [2023-08-26 15:53:03,237 INFO L125 PetriNetUnfolderBase]: For 1136/1136 co-relation queries the response was YES. [2023-08-26 15:53:03,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6815 conditions, 5730 events. 1144/5730 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 48451 event pairs, 522 based on Foata normal form. 0/4559 useless extension candidates. Maximal degree in co-relation 3519. Up to 1024 conditions per place. [2023-08-26 15:53:03,301 INFO L82 GeneralOperation]: Start removeDead. Operand has 276 places, 323 transitions, 766 flow [2023-08-26 15:53:03,343 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 276 places, 323 transitions, 766 flow [2023-08-26 15:53:03,344 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:53:03,344 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 276 places, 323 transitions, 766 flow [2023-08-26 15:53:03,344 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 276 places, 323 transitions, 766 flow [2023-08-26 15:53:03,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 276 places, 323 transitions, 766 flow [2023-08-26 15:53:04,250 INFO L124 PetriNetUnfolderBase]: 1144/5730 cut-off events. [2023-08-26 15:53:04,250 INFO L125 PetriNetUnfolderBase]: For 1136/1136 co-relation queries the response was YES. [2023-08-26 15:53:04,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6815 conditions, 5730 events. 1144/5730 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 48451 event pairs, 522 based on Foata normal form. 0/4559 useless extension candidates. Maximal degree in co-relation 3519. Up to 1024 conditions per place. [2023-08-26 15:53:04,457 INFO L119 LiptonReduction]: Number of co-enabled transitions 74144 [2023-08-26 15:53:07,108 INFO L134 LiptonReduction]: Checked pairs total: 215531 [2023-08-26 15:53:07,108 INFO L136 LiptonReduction]: Total number of compositions: 196 [2023-08-26 15:53:07,109 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:53:07,110 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;@54aaf575, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:53:07,110 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:53:07,159 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:53:07,159 INFO L124 PetriNetUnfolderBase]: 102/465 cut-off events. [2023-08-26 15:53:07,160 INFO L125 PetriNetUnfolderBase]: For 182/182 co-relation queries the response was YES. [2023-08-26 15:53:07,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:53:07,160 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:53:07,160 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:53:07,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:53:07,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1299910614, now seen corresponding path program 1 times [2023-08-26 15:53:07,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:53:07,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020370496] [2023-08-26 15:53:07,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:53:07,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:53:07,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:53:07,181 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:53:07,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:53:07,200 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:53:07,200 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:53:07,201 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:53:07,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 15:53:07,201 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:53:07,202 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:53:07,202 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:53:07,202 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-08-26 15:53:07,231 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-26 15:53:07,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 301 places, 353 transitions, 850 flow [2023-08-26 15:53:09,145 INFO L124 PetriNetUnfolderBase]: 2438/11175 cut-off events. [2023-08-26 15:53:09,145 INFO L125 PetriNetUnfolderBase]: For 2460/2460 co-relation queries the response was YES. [2023-08-26 15:53:09,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13552 conditions, 11175 events. 2438/11175 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 110783 event pairs, 1291 based on Foata normal form. 0/8963 useless extension candidates. Maximal degree in co-relation 6797. Up to 2304 conditions per place. [2023-08-26 15:53:09,432 INFO L82 GeneralOperation]: Start removeDead. Operand has 301 places, 353 transitions, 850 flow [2023-08-26 15:53:09,523 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 301 places, 353 transitions, 850 flow [2023-08-26 15:53:09,524 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:53:09,524 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 301 places, 353 transitions, 850 flow [2023-08-26 15:53:09,524 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 301 places, 353 transitions, 850 flow [2023-08-26 15:53:09,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 301 places, 353 transitions, 850 flow [2023-08-26 15:53:11,369 INFO L124 PetriNetUnfolderBase]: 2438/11175 cut-off events. [2023-08-26 15:53:11,370 INFO L125 PetriNetUnfolderBase]: For 2460/2460 co-relation queries the response was YES. [2023-08-26 15:53:11,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13552 conditions, 11175 events. 2438/11175 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 110783 event pairs, 1291 based on Foata normal form. 0/8963 useless extension candidates. Maximal degree in co-relation 6797. Up to 2304 conditions per place. [2023-08-26 15:53:11,901 INFO L119 LiptonReduction]: Number of co-enabled transitions 91224 [2023-08-26 15:53:14,689 INFO L134 LiptonReduction]: Checked pairs total: 264625 [2023-08-26 15:53:14,689 INFO L136 LiptonReduction]: Total number of compositions: 211 [2023-08-26 15:53:14,690 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:53:14,691 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;@54aaf575, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:53:14,691 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:53:14,737 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:53:14,737 INFO L124 PetriNetUnfolderBase]: 144/637 cut-off events. [2023-08-26 15:53:14,737 INFO L125 PetriNetUnfolderBase]: For 285/285 co-relation queries the response was YES. [2023-08-26 15:53:14,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:53:14,737 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:53:14,737 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:53:14,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:53:14,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1841114407, now seen corresponding path program 1 times [2023-08-26 15:53:14,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:53:14,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589197534] [2023-08-26 15:53:14,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:53:14,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:53:14,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:53:14,758 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:53:14,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:53:14,779 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:53:14,779 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:53:14,780 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:53:14,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 15:53:14,782 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:53:14,785 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:53:14,786 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:53:14,786 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-08-26 15:53:14,823 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2023-08-26 15:53:14,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 326 places, 383 transitions, 936 flow [2023-08-26 15:53:19,263 INFO L124 PetriNetUnfolderBase]: 5268/22252 cut-off events. [2023-08-26 15:53:19,263 INFO L125 PetriNetUnfolderBase]: For 5330/5330 co-relation queries the response was YES. [2023-08-26 15:53:19,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27458 conditions, 22252 events. 5268/22252 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 246504 event pairs, 3084 based on Foata normal form. 0/17975 useless extension candidates. Maximal degree in co-relation 13532. Up to 5120 conditions per place. [2023-08-26 15:53:19,625 INFO L82 GeneralOperation]: Start removeDead. Operand has 326 places, 383 transitions, 936 flow [2023-08-26 15:53:19,945 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 326 places, 383 transitions, 936 flow [2023-08-26 15:53:19,945 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:53:19,945 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 326 places, 383 transitions, 936 flow [2023-08-26 15:53:19,945 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 326 places, 383 transitions, 936 flow [2023-08-26 15:53:19,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 326 places, 383 transitions, 936 flow [2023-08-26 15:53:24,145 INFO L124 PetriNetUnfolderBase]: 5268/22252 cut-off events. [2023-08-26 15:53:24,145 INFO L125 PetriNetUnfolderBase]: For 5330/5330 co-relation queries the response was YES. [2023-08-26 15:53:24,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27458 conditions, 22252 events. 5268/22252 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 246504 event pairs, 3084 based on Foata normal form. 0/17975 useless extension candidates. Maximal degree in co-relation 13532. Up to 5120 conditions per place. [2023-08-26 15:53:25,393 INFO L119 LiptonReduction]: Number of co-enabled transitions 110040 [2023-08-26 15:53:28,286 INFO L134 LiptonReduction]: Checked pairs total: 327749 [2023-08-26 15:53:28,287 INFO L136 LiptonReduction]: Total number of compositions: 223 [2023-08-26 15:53:28,288 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:53:28,288 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;@54aaf575, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:53:28,288 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:53:28,355 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:53:28,356 INFO L124 PetriNetUnfolderBase]: 227/917 cut-off events. [2023-08-26 15:53:28,356 INFO L125 PetriNetUnfolderBase]: For 446/446 co-relation queries the response was YES. [2023-08-26 15:53:28,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:53:28,356 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:53:28,356 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:53:28,356 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:53:28,356 INFO L85 PathProgramCache]: Analyzing trace with hash -369767309, now seen corresponding path program 1 times [2023-08-26 15:53:28,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:53:28,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966668098] [2023-08-26 15:53:28,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:53:28,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:53:28,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:53:28,392 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:53:28,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:53:28,424 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:53:28,424 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:53:28,424 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:53:28,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 15:53:28,424 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:53:28,425 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:53:28,425 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:53:28,425 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-08-26 15:53:28,456 INFO L144 ThreadInstanceAdder]: Constructed 11 joinOtherThreadTransitions. [2023-08-26 15:53:28,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 351 places, 413 transitions, 1024 flow [2023-08-26 15:53:37,948 INFO L124 PetriNetUnfolderBase]: 11426/44849 cut-off events. [2023-08-26 15:53:37,948 INFO L125 PetriNetUnfolderBase]: For 11539/11539 co-relation queries the response was YES. [2023-08-26 15:53:38,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56213 conditions, 44849 events. 11426/44849 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 1129. Compared 557609 event pairs, 7181 based on Foata normal form. 0/36459 useless extension candidates. Maximal degree in co-relation 27437. Up to 11264 conditions per place. [2023-08-26 15:53:38,972 INFO L82 GeneralOperation]: Start removeDead. Operand has 351 places, 413 transitions, 1024 flow [2023-08-26 15:53:39,630 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 351 places, 413 transitions, 1024 flow [2023-08-26 15:53:39,630 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:53:39,630 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 351 places, 413 transitions, 1024 flow [2023-08-26 15:53:39,630 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 351 places, 413 transitions, 1024 flow [2023-08-26 15:53:39,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 351 places, 413 transitions, 1024 flow [2023-08-26 15:53:48,795 INFO L124 PetriNetUnfolderBase]: 11426/44849 cut-off events. [2023-08-26 15:53:48,795 INFO L125 PetriNetUnfolderBase]: For 11539/11539 co-relation queries the response was YES. [2023-08-26 15:53:49,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56213 conditions, 44849 events. 11426/44849 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 1129. Compared 557609 event pairs, 7181 based on Foata normal form. 0/36459 useless extension candidates. Maximal degree in co-relation 27437. Up to 11264 conditions per place. [2023-08-26 15:53:51,720 INFO L119 LiptonReduction]: Number of co-enabled transitions 130592 [2023-08-26 15:53:54,753 INFO L134 LiptonReduction]: Checked pairs total: 386481 [2023-08-26 15:53:54,753 INFO L136 LiptonReduction]: Total number of compositions: 238 [2023-08-26 15:53:54,754 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:53:54,755 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;@54aaf575, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:53:54,755 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:53:54,852 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:53:54,852 INFO L124 PetriNetUnfolderBase]: 339/1276 cut-off events. [2023-08-26 15:53:54,852 INFO L125 PetriNetUnfolderBase]: For 653/653 co-relation queries the response was YES. [2023-08-26 15:53:54,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:53:54,852 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:53:54,853 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:53:54,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:53:54,853 INFO L85 PathProgramCache]: Analyzing trace with hash 626452248, now seen corresponding path program 1 times [2023-08-26 15:53:54,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:53:54,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812811454] [2023-08-26 15:53:54,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:53:54,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:53:54,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:53:54,878 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:53:54,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:53:54,899 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:53:54,900 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:53:54,900 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:53:54,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 15:53:54,900 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:53:54,900 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:53:54,901 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:53:54,901 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-08-26 15:53:54,930 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2023-08-26 15:53:54,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 376 places, 443 transitions, 1114 flow [2023-08-26 15:54:15,837 INFO L124 PetriNetUnfolderBase]: 24752/90998 cut-off events. [2023-08-26 15:54:15,838 INFO L125 PetriNetUnfolderBase]: For 24928/24928 co-relation queries the response was YES. [2023-08-26 15:54:20,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115689 conditions, 90998 events. 24752/90998 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 2111. Compared 1230004 event pairs, 16398 based on Foata normal form. 0/74399 useless extension candidates. Maximal degree in co-relation 56192. Up to 24576 conditions per place. [2023-08-26 15:54:20,094 INFO L82 GeneralOperation]: Start removeDead. Operand has 376 places, 443 transitions, 1114 flow [2023-08-26 15:54:21,933 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 376 places, 443 transitions, 1114 flow [2023-08-26 15:54:21,934 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:54:21,934 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 376 places, 443 transitions, 1114 flow [2023-08-26 15:54:21,934 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 376 places, 443 transitions, 1114 flow [2023-08-26 15:54:21,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 376 places, 443 transitions, 1114 flow [2023-08-26 15:54:44,743 INFO L124 PetriNetUnfolderBase]: 24752/90998 cut-off events. [2023-08-26 15:54:44,744 INFO L125 PetriNetUnfolderBase]: For 24928/24928 co-relation queries the response was YES. [2023-08-26 15:54:49,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115689 conditions, 90998 events. 24752/90998 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 2111. Compared 1230004 event pairs, 16398 based on Foata normal form. 0/74399 useless extension candidates. Maximal degree in co-relation 56192. Up to 24576 conditions per place. [2023-08-26 15:54:55,534 INFO L119 LiptonReduction]: Number of co-enabled transitions 152880 [2023-08-26 15:54:58,734 INFO L134 LiptonReduction]: Checked pairs total: 465762 [2023-08-26 15:54:58,734 INFO L136 LiptonReduction]: Total number of compositions: 253 [2023-08-26 15:54:58,735 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:54:58,736 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;@54aaf575, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:54:58,736 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:54:58,903 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:54:58,903 INFO L124 PetriNetUnfolderBase]: 513/1828 cut-off events. [2023-08-26 15:54:58,904 INFO L125 PetriNetUnfolderBase]: For 995/995 co-relation queries the response was YES. [2023-08-26 15:54:58,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:54:58,904 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:54:58,904 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:54:58,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:54:58,904 INFO L85 PathProgramCache]: Analyzing trace with hash -41724551, now seen corresponding path program 1 times [2023-08-26 15:54:58,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:54:58,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320305345] [2023-08-26 15:54:58,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:54:58,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:54:58,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:54:58,928 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:54:58,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:54:58,949 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:54:58,950 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:54:58,950 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:54:58,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 15:54:58,950 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:54:58,950 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:54:58,951 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:54:58,951 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-08-26 15:54:58,981 INFO L144 ThreadInstanceAdder]: Constructed 13 joinOtherThreadTransitions. [2023-08-26 15:54:58,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 401 places, 473 transitions, 1206 flow [2023-08-26 15:55:45,861 INFO L124 PetriNetUnfolderBase]: 53438/185275 cut-off events. [2023-08-26 15:55:45,862 INFO L125 PetriNetUnfolderBase]: For 53690/53690 co-relation queries the response was YES. [2023-08-26 15:55:57,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238654 conditions, 185275 events. 53438/185275 cut-off events. For 53690/53690 co-relation queries the response was YES. Maximal size of possible extension queue 4117. Compared 2719445 event pairs, 36879 based on Foata normal form. 0/152275 useless extension candidates. Maximal degree in co-relation 115668. Up to 53248 conditions per place. [2023-08-26 15:55:57,806 INFO L82 GeneralOperation]: Start removeDead. Operand has 401 places, 473 transitions, 1206 flow [2023-08-26 15:56:02,745 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 401 places, 473 transitions, 1206 flow [2023-08-26 15:56:02,745 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:56:02,745 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 401 places, 473 transitions, 1206 flow [2023-08-26 15:56:02,745 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 401 places, 473 transitions, 1206 flow [2023-08-26 15:56:02,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 401 places, 473 transitions, 1206 flow [2023-08-26 15:56:51,507 INFO L124 PetriNetUnfolderBase]: 53438/185275 cut-off events. [2023-08-26 15:56:51,508 INFO L125 PetriNetUnfolderBase]: For 53690/53690 co-relation queries the response was YES. [2023-08-26 15:57:01,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238654 conditions, 185275 events. 53438/185275 cut-off events. For 53690/53690 co-relation queries the response was YES. Maximal size of possible extension queue 4117. Compared 2719445 event pairs, 36879 based on Foata normal form. 0/152275 useless extension candidates. Maximal degree in co-relation 115668. Up to 53248 conditions per place. [2023-08-26 15:57:19,491 INFO L119 LiptonReduction]: Number of co-enabled transitions 176904 [2023-08-26 15:57:22,680 INFO L134 LiptonReduction]: Checked pairs total: 540223 [2023-08-26 15:57:22,680 INFO L136 LiptonReduction]: Total number of compositions: 268 [2023-08-26 15:57:22,681 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:57:22,682 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@54aaf575, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:57:22,682 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:57:22,958 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:57:22,958 INFO L124 PetriNetUnfolderBase]: 843/2754 cut-off events. [2023-08-26 15:57:22,958 INFO L125 PetriNetUnfolderBase]: For 1542/1542 co-relation queries the response was YES. [2023-08-26 15:57:22,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:57:22,958 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:57:22,958 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:57:22,958 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:57:22,958 INFO L85 PathProgramCache]: Analyzing trace with hash 884417552, now seen corresponding path program 1 times [2023-08-26 15:57:22,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:57:22,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785896724] [2023-08-26 15:57:22,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:57:22,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:57:22,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:57:22,982 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:57:22,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:57:23,006 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:57:23,006 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:57:23,006 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:57:23,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 15:57:23,007 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:57:23,007 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:57:23,007 WARN L233 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:57:23,007 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2023-08-26 15:57:23,042 INFO L144 ThreadInstanceAdder]: Constructed 14 joinOtherThreadTransitions. [2023-08-26 15:57:23,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 426 places, 503 transitions, 1300 flow