/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_82-list_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 16:04:39,362 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 16:04:39,452 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 16:04:39,457 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 16:04:39,457 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 16:04:39,489 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 16:04:39,490 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 16:04:39,490 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 16:04:39,491 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 16:04:39,494 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 16:04:39,494 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 16:04:39,495 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 16:04:39,495 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 16:04:39,496 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 16:04:39,496 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 16:04:39,496 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 16:04:39,497 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 16:04:39,497 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 16:04:39,497 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 16:04:39,497 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 16:04:39,498 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 16:04:39,498 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 16:04:39,498 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 16:04:39,499 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 16:04:39,499 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 16:04:39,499 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 16:04:39,499 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 16:04:39,499 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 16:04:39,500 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 16:04:39,500 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 16:04:39,501 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 16:04:39,501 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 16:04:39,501 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 16:04:39,501 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 16:04:39,501 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 16:04:39,502 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 16:04:39,813 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 16:04:39,831 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 16:04:39,834 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 16:04:39,835 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 16:04:39,835 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 16:04:39,837 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_82-list_racefree.i [2023-08-26 16:04:40,994 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 16:04:41,349 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 16:04:41,349 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_82-list_racefree.i [2023-08-26 16:04:41,371 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e85543bcd/c7fd8b14f9a0459782844786ddc546ce/FLAGf8be8e090 [2023-08-26 16:04:41,387 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e85543bcd/c7fd8b14f9a0459782844786ddc546ce [2023-08-26 16:04:41,391 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 16:04:41,393 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 16:04:41,395 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 16:04:41,395 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 16:04:41,399 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 16:04:41,399 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 04:04:41" (1/1) ... [2023-08-26 16:04:41,400 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23e13443 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:04:41, skipping insertion in model container [2023-08-26 16:04:41,400 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 04:04:41" (1/1) ... [2023-08-26 16:04:41,455 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 16:04:41,914 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 16:04:41,928 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 16:04:41,955 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-26 16:04:41,957 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-26 16:04:42,006 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 16:04:42,066 INFO L206 MainTranslator]: Completed translation [2023-08-26 16:04:42,066 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:04:42 WrapperNode [2023-08-26 16:04:42,066 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 16:04:42,067 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 16:04:42,067 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 16:04:42,067 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 16:04:42,073 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:04:42" (1/1) ... [2023-08-26 16:04:42,091 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:04:42" (1/1) ... [2023-08-26 16:04:42,116 INFO L138 Inliner]: procedures = 278, calls = 62, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 215 [2023-08-26 16:04:42,117 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 16:04:42,118 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 16:04:42,118 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 16:04:42,118 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 16:04:42,126 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:04:42" (1/1) ... [2023-08-26 16:04:42,126 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:04:42" (1/1) ... [2023-08-26 16:04:42,130 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:04:42" (1/1) ... [2023-08-26 16:04:42,131 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:04:42" (1/1) ... [2023-08-26 16:04:42,139 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:04:42" (1/1) ... [2023-08-26 16:04:42,144 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:04:42" (1/1) ... [2023-08-26 16:04:42,146 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:04:42" (1/1) ... [2023-08-26 16:04:42,148 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:04:42" (1/1) ... [2023-08-26 16:04:42,151 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 16:04:42,152 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 16:04:42,152 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 16:04:42,153 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 16:04:42,153 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:04:42" (1/1) ... [2023-08-26 16:04:42,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 16:04:42,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:04:42,198 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 16:04:42,225 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 16:04:42,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 16:04:42,245 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-08-26 16:04:42,246 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-08-26 16:04:42,247 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-08-26 16:04:42,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 16:04:42,247 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 16:04:42,247 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-08-26 16:04:42,247 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-08-26 16:04:42,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 16:04:42,248 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 16:04:42,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-26 16:04:42,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 16:04:42,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-26 16:04:42,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 16:04:42,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 16:04:42,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 16:04:42,250 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 16:04:42,444 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 16:04:42,446 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 16:04:42,951 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 16:04:42,966 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 16:04:42,966 INFO L302 CfgBuilder]: Removed 15 assume(true) statements. [2023-08-26 16:04:42,969 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 04:04:42 BoogieIcfgContainer [2023-08-26 16:04:42,969 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 16:04:42,971 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 16:04:42,971 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 16:04:42,974 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 16:04:42,974 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 04:04:41" (1/3) ... [2023-08-26 16:04:42,975 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9dc4a2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 04:04:42, skipping insertion in model container [2023-08-26 16:04:42,976 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:04:42" (2/3) ... [2023-08-26 16:04:42,976 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9dc4a2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 04:04:42, skipping insertion in model container [2023-08-26 16:04:42,976 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 04:04:42" (3/3) ... [2023-08-26 16:04:42,977 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_82-list_racefree.i [2023-08-26 16:04:42,999 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 16:04:43,000 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 37 error locations. [2023-08-26 16:04:43,000 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 16:04:43,128 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-26 16:04:43,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 235 places, 254 transitions, 530 flow [2023-08-26 16:04:43,292 INFO L124 PetriNetUnfolderBase]: 54/494 cut-off events. [2023-08-26 16:04:43,292 INFO L125 PetriNetUnfolderBase]: For 8/14 co-relation queries the response was YES. [2023-08-26 16:04:43,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 514 conditions, 494 events. 54/494 cut-off events. For 8/14 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2325 event pairs, 0 based on Foata normal form. 0/362 useless extension candidates. Maximal degree in co-relation 249. Up to 8 conditions per place. [2023-08-26 16:04:43,302 INFO L82 GeneralOperation]: Start removeDead. Operand has 235 places, 254 transitions, 530 flow [2023-08-26 16:04:43,309 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 229 places, 246 transitions, 508 flow [2023-08-26 16:04:43,313 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 16:04:43,321 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 229 places, 246 transitions, 508 flow [2023-08-26 16:04:43,323 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 229 places, 246 transitions, 508 flow [2023-08-26 16:04:43,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 229 places, 246 transitions, 508 flow [2023-08-26 16:04:43,421 INFO L124 PetriNetUnfolderBase]: 50/474 cut-off events. [2023-08-26 16:04:43,421 INFO L125 PetriNetUnfolderBase]: For 4/6 co-relation queries the response was YES. [2023-08-26 16:04:43,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 490 conditions, 474 events. 50/474 cut-off events. For 4/6 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2207 event pairs, 0 based on Foata normal form. 0/350 useless extension candidates. Maximal degree in co-relation 231. Up to 8 conditions per place. [2023-08-26 16:04:43,442 INFO L119 LiptonReduction]: Number of co-enabled transitions 20736 [2023-08-26 16:04:51,169 INFO L134 LiptonReduction]: Checked pairs total: 50007 [2023-08-26 16:04:51,169 INFO L136 LiptonReduction]: Total number of compositions: 203 [2023-08-26 16:04:51,181 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 16:04:51,186 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;@3f031820, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 16:04:51,186 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-26 16:04:51,192 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 16:04:51,193 INFO L124 PetriNetUnfolderBase]: 2/38 cut-off events. [2023-08-26 16:04:51,193 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 16:04:51,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:04:51,194 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-26 16:04:51,194 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 16:04:51,198 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:04:51,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1061579621, now seen corresponding path program 1 times [2023-08-26 16:04:51,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:04:51,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221157622] [2023-08-26 16:04:51,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:04:51,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:04:51,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 16:04:51,397 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 16:04:51,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 16:04:51,483 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 16:04:51,484 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 16:04:51,485 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-26 16:04:51,487 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-26 16:04:51,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 16:04:51,488 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 16:04:51,494 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-26 16:04:51,495 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 16:04:51,495 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-26 16:04:51,590 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-26 16:04:51,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 364 places, 399 transitions, 846 flow [2023-08-26 16:04:51,933 INFO L124 PetriNetUnfolderBase]: 197/1459 cut-off events. [2023-08-26 16:04:51,933 INFO L125 PetriNetUnfolderBase]: For 72/102 co-relation queries the response was YES. [2023-08-26 16:04:51,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1556 conditions, 1459 events. 197/1459 cut-off events. For 72/102 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 10007 event pairs, 1 based on Foata normal form. 0/1070 useless extension candidates. Maximal degree in co-relation 913. Up to 32 conditions per place. [2023-08-26 16:04:51,967 INFO L82 GeneralOperation]: Start removeDead. Operand has 364 places, 399 transitions, 846 flow [2023-08-26 16:04:51,980 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 358 places, 393 transitions, 834 flow [2023-08-26 16:04:51,981 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 16:04:51,981 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 358 places, 393 transitions, 834 flow [2023-08-26 16:04:51,981 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 358 places, 393 transitions, 834 flow [2023-08-26 16:04:51,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 358 places, 393 transitions, 834 flow [2023-08-26 16:04:52,289 INFO L124 PetriNetUnfolderBase]: 197/1449 cut-off events. [2023-08-26 16:04:52,289 INFO L125 PetriNetUnfolderBase]: For 72/102 co-relation queries the response was YES. [2023-08-26 16:04:52,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1546 conditions, 1449 events. 197/1449 cut-off events. For 72/102 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 9938 event pairs, 1 based on Foata normal form. 0/1070 useless extension candidates. Maximal degree in co-relation 905. Up to 32 conditions per place. [2023-08-26 16:04:52,379 INFO L119 LiptonReduction]: Number of co-enabled transitions 84068 [2023-08-26 16:05:01,767 INFO L134 LiptonReduction]: Checked pairs total: 257309 [2023-08-26 16:05:01,768 INFO L136 LiptonReduction]: Total number of compositions: 303 [2023-08-26 16:05:01,770 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 16:05:01,771 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;@3f031820, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 16:05:01,771 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-26 16:05:01,805 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 16:05:01,806 INFO L124 PetriNetUnfolderBase]: 15/150 cut-off events. [2023-08-26 16:05:01,806 INFO L125 PetriNetUnfolderBase]: For 9/12 co-relation queries the response was YES. [2023-08-26 16:05:01,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:05:01,806 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-26 16:05:01,808 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 16:05:01,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:05:01,809 INFO L85 PathProgramCache]: Analyzing trace with hash -612404300, now seen corresponding path program 1 times [2023-08-26 16:05:01,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:05:01,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391918145] [2023-08-26 16:05:01,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:05:01,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:05:01,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 16:05:01,842 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 16:05:01,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 16:05:01,889 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 16:05:01,889 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 16:05:01,889 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-26 16:05:01,889 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-26 16:05:01,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 16:05:01,890 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 16:05:01,890 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-26 16:05:01,890 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 16:05:01,890 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-26 16:05:01,964 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2023-08-26 16:05:01,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 493 places, 544 transitions, 1166 flow [2023-08-26 16:05:02,974 INFO L124 PetriNetUnfolderBase]: 676/4012 cut-off events. [2023-08-26 16:05:02,974 INFO L125 PetriNetUnfolderBase]: For 419/485 co-relation queries the response was YES. [2023-08-26 16:05:03,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4463 conditions, 4012 events. 676/4012 cut-off events. For 419/485 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 33580 event pairs, 32 based on Foata normal form. 0/3006 useless extension candidates. Maximal degree in co-relation 2601. Up to 192 conditions per place. [2023-08-26 16:05:03,049 INFO L82 GeneralOperation]: Start removeDead. Operand has 493 places, 544 transitions, 1166 flow [2023-08-26 16:05:03,093 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 487 places, 538 transitions, 1154 flow [2023-08-26 16:05:03,093 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 16:05:03,093 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 487 places, 538 transitions, 1154 flow [2023-08-26 16:05:03,093 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 487 places, 538 transitions, 1154 flow [2023-08-26 16:05:03,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 487 places, 538 transitions, 1154 flow [2023-08-26 16:05:04,046 INFO L124 PetriNetUnfolderBase]: 676/4000 cut-off events. [2023-08-26 16:05:04,046 INFO L125 PetriNetUnfolderBase]: For 419/485 co-relation queries the response was YES. [2023-08-26 16:05:04,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4451 conditions, 4000 events. 676/4000 cut-off events. For 419/485 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 33440 event pairs, 32 based on Foata normal form. 0/3006 useless extension candidates. Maximal degree in co-relation 2591. Up to 192 conditions per place. [2023-08-26 16:05:04,555 INFO L119 LiptonReduction]: Number of co-enabled transitions 188016 [2023-08-26 16:05:15,422 INFO L134 LiptonReduction]: Checked pairs total: 597816 [2023-08-26 16:05:15,422 INFO L136 LiptonReduction]: Total number of compositions: 410 [2023-08-26 16:05:15,424 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 16:05:15,425 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;@3f031820, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 16:05:15,425 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-26 16:05:15,451 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 16:05:15,451 INFO L124 PetriNetUnfolderBase]: 45/328 cut-off events. [2023-08-26 16:05:15,451 INFO L125 PetriNetUnfolderBase]: For 33/38 co-relation queries the response was YES. [2023-08-26 16:05:15,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:05:15,451 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-26 16:05:15,451 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 16:05:15,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:05:15,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1710046564, now seen corresponding path program 1 times [2023-08-26 16:05:15,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:05:15,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085810784] [2023-08-26 16:05:15,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:05:15,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:05:15,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 16:05:15,482 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 16:05:15,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 16:05:15,508 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 16:05:15,508 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 16:05:15,508 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-26 16:05:15,508 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-26 16:05:15,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 16:05:15,509 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 16:05:15,509 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-26 16:05:15,509 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 16:05:15,509 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-26 16:05:15,612 INFO L144 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2023-08-26 16:05:15,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 622 places, 689 transitions, 1490 flow [2023-08-26 16:05:19,863 INFO L124 PetriNetUnfolderBase]: 2679/12473 cut-off events. [2023-08-26 16:05:19,863 INFO L125 PetriNetUnfolderBase]: For 2144/2258 co-relation queries the response was YES. [2023-08-26 16:05:20,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14638 conditions, 12473 events. 2679/12473 cut-off events. For 2144/2258 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 123851 event pairs, 313 based on Foata normal form. 0/9626 useless extension candidates. Maximal degree in co-relation 7908. Up to 1024 conditions per place. [2023-08-26 16:05:20,249 INFO L82 GeneralOperation]: Start removeDead. Operand has 622 places, 689 transitions, 1490 flow [2023-08-26 16:05:20,532 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 616 places, 683 transitions, 1478 flow [2023-08-26 16:05:20,532 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 16:05:20,533 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 616 places, 683 transitions, 1478 flow [2023-08-26 16:05:20,533 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 616 places, 683 transitions, 1478 flow [2023-08-26 16:05:20,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 616 places, 683 transitions, 1478 flow [2023-08-26 16:05:24,194 INFO L124 PetriNetUnfolderBase]: 2679/12459 cut-off events. [2023-08-26 16:05:24,194 INFO L125 PetriNetUnfolderBase]: For 2144/2258 co-relation queries the response was YES. [2023-08-26 16:05:24,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14624 conditions, 12459 events. 2679/12459 cut-off events. For 2144/2258 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 123624 event pairs, 313 based on Foata normal form. 0/9626 useless extension candidates. Maximal degree in co-relation 7896. Up to 1024 conditions per place. [2023-08-26 16:05:25,573 INFO L119 LiptonReduction]: Number of co-enabled transitions 333240 [2023-08-26 16:05:39,792 INFO L134 LiptonReduction]: Checked pairs total: 1191914 [2023-08-26 16:05:39,793 INFO L136 LiptonReduction]: Total number of compositions: 534 [2023-08-26 16:05:39,795 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 16:05:39,796 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;@3f031820, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 16:05:39,797 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-26 16:05:39,860 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 16:05:39,861 INFO L124 PetriNetUnfolderBase]: 93/585 cut-off events. [2023-08-26 16:05:39,861 INFO L125 PetriNetUnfolderBase]: For 85/97 co-relation queries the response was YES. [2023-08-26 16:05:39,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:05:39,861 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-26 16:05:39,861 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 16:05:39,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:05:39,862 INFO L85 PathProgramCache]: Analyzing trace with hash 651539901, now seen corresponding path program 1 times [2023-08-26 16:05:39,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:05:39,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486630342] [2023-08-26 16:05:39,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:05:39,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:05:39,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 16:05:39,894 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 16:05:39,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 16:05:39,922 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 16:05:39,923 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 16:05:39,923 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-26 16:05:39,923 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-26 16:05:39,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 16:05:39,924 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 16:05:39,924 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-26 16:05:39,924 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 16:05:39,924 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-26 16:05:40,034 INFO L144 ThreadInstanceAdder]: Constructed 20 joinOtherThreadTransitions. [2023-08-26 16:05:40,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 751 places, 834 transitions, 1818 flow [2023-08-26 16:06:00,875 INFO L124 PetriNetUnfolderBase]: 11822/44986 cut-off events. [2023-08-26 16:06:00,876 INFO L125 PetriNetUnfolderBase]: For 10450/10600 co-relation queries the response was YES. [2023-08-26 16:06:03,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55412 conditions, 44986 events. 11822/44986 cut-off events. For 10450/10600 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 526229 event pairs, 2148 based on Foata normal form. 0/35624 useless extension candidates. Maximal degree in co-relation 28069. Up to 5120 conditions per place. [2023-08-26 16:06:03,749 INFO L82 GeneralOperation]: Start removeDead. Operand has 751 places, 834 transitions, 1818 flow [2023-08-26 16:06:04,405 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 745 places, 828 transitions, 1806 flow [2023-08-26 16:06:04,405 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 16:06:04,405 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 745 places, 828 transitions, 1806 flow [2023-08-26 16:06:04,406 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 745 places, 828 transitions, 1806 flow [2023-08-26 16:06:04,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 745 places, 828 transitions, 1806 flow [2023-08-26 16:06:23,776 INFO L124 PetriNetUnfolderBase]: 11822/44970 cut-off events. [2023-08-26 16:06:23,776 INFO L125 PetriNetUnfolderBase]: For 10450/10600 co-relation queries the response was YES. [2023-08-26 16:06:26,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55396 conditions, 44970 events. 11822/44970 cut-off events. For 10450/10600 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 525511 event pairs, 2148 based on Foata normal form. 0/35624 useless extension candidates. Maximal degree in co-relation 28055. Up to 5120 conditions per place. [2023-08-26 16:06:30,812 INFO L119 LiptonReduction]: Number of co-enabled transitions 519740 [2023-08-26 16:06:44,590 INFO L134 LiptonReduction]: Checked pairs total: 1703577 [2023-08-26 16:06:44,590 INFO L136 LiptonReduction]: Total number of compositions: 647 [2023-08-26 16:06:44,592 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 16:06:44,593 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;@3f031820, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 16:06:44,593 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-26 16:06:44,687 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 16:06:44,687 INFO L124 PetriNetUnfolderBase]: 170/942 cut-off events. [2023-08-26 16:06:44,687 INFO L125 PetriNetUnfolderBase]: For 177/195 co-relation queries the response was YES. [2023-08-26 16:06:44,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:06:44,688 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:06:44,688 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 16:06:44,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:06:44,688 INFO L85 PathProgramCache]: Analyzing trace with hash -609411256, now seen corresponding path program 1 times [2023-08-26 16:06:44,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:06:44,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791951488] [2023-08-26 16:06:44,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:06:44,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:06:44,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 16:06:44,743 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 16:06:44,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 16:06:44,797 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 16:06:44,798 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 16:06:44,798 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-26 16:06:44,798 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-26 16:06:44,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 16:06:44,798 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 16:06:44,799 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-26 16:06:44,799 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 16:06:44,799 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-26 16:06:44,902 INFO L144 ThreadInstanceAdder]: Constructed 24 joinOtherThreadTransitions. [2023-08-26 16:06:44,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 880 places, 979 transitions, 2150 flow [2023-08-26 16:08:43,592 INFO L124 PetriNetUnfolderBase]: 54025/177583 cut-off events. [2023-08-26 16:08:43,593 INFO L125 PetriNetUnfolderBase]: For 49552/49686 co-relation queries the response was YES. [2023-08-26 16:09:06,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227012 conditions, 177583 events. 54025/177583 cut-off events. For 49552/49686 co-relation queries the response was YES. Maximal size of possible extension queue 2376. Compared 2437782 event pairs, 22149 based on Foata normal form. 0/143218 useless extension candidates. Maximal degree in co-relation 111471. Up to 24576 conditions per place. [2023-08-26 16:09:06,314 INFO L82 GeneralOperation]: Start removeDead. Operand has 880 places, 979 transitions, 2150 flow [2023-08-26 16:09:13,291 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 874 places, 973 transitions, 2138 flow [2023-08-26 16:09:13,291 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 16:09:13,291 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 874 places, 973 transitions, 2138 flow [2023-08-26 16:09:13,292 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 874 places, 973 transitions, 2138 flow [2023-08-26 16:09:13,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 874 places, 973 transitions, 2138 flow