./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_24-sound_lock_racing.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_24-sound_lock_racing.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1eea0d699fc30cae440905f5eeea19b8e9e5d0b5cc249e9ffded8d356549b279 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 00:37:11,891 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 00:37:11,893 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 00:37:11,936 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 00:37:11,936 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 00:37:11,939 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 00:37:11,941 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 00:37:11,943 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 00:37:11,945 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 00:37:11,950 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 00:37:11,951 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 00:37:11,953 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 00:37:11,954 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 00:37:11,955 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 00:37:11,957 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 00:37:11,962 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 00:37:11,963 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 00:37:11,964 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 00:37:11,966 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 00:37:11,971 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 00:37:11,972 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 00:37:11,975 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 00:37:11,975 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 00:37:11,976 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 00:37:11,983 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 00:37:11,984 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 00:37:11,984 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 00:37:11,986 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 00:37:11,986 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 00:37:11,987 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 00:37:11,988 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 00:37:11,989 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 00:37:11,990 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 00:37:11,991 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 00:37:11,992 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 00:37:11,992 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 00:37:11,992 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 00:37:11,993 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 00:37:11,993 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 00:37:11,994 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 00:37:11,994 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 00:37:11,996 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 00:37:12,039 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 00:37:12,040 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 00:37:12,041 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 00:37:12,042 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 00:37:12,043 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 00:37:12,043 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 00:37:12,043 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 00:37:12,044 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 00:37:12,044 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 00:37:12,044 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 00:37:12,045 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 00:37:12,045 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 00:37:12,045 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 00:37:12,045 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 00:37:12,046 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 00:37:12,046 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 00:37:12,046 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 00:37:12,046 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 00:37:12,046 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 00:37:12,046 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 00:37:12,046 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 00:37:12,047 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 00:37:12,047 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 00:37:12,047 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 00:37:12,047 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 00:37:12,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 00:37:12,048 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 00:37:12,048 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 00:37:12,048 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 00:37:12,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 00:37:12,048 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 00:37:12,048 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 00:37:12,049 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 00:37:12,049 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 00:37:12,049 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1eea0d699fc30cae440905f5eeea19b8e9e5d0b5cc249e9ffded8d356549b279 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 00:37:12,338 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 00:37:12,353 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 00:37:12,355 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 00:37:12,356 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 00:37:12,357 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 00:37:12,358 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_24-sound_lock_racing.i [2023-09-01 00:37:13,603 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 00:37:13,834 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 00:37:13,838 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_24-sound_lock_racing.i [2023-09-01 00:37:13,853 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/903921f41/248b848102194439b954be3c3b2f57f1/FLAG60925fd01 [2023-09-01 00:37:13,863 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/903921f41/248b848102194439b954be3c3b2f57f1 [2023-09-01 00:37:13,865 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 00:37:13,866 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 00:37:13,867 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 00:37:13,867 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 00:37:13,871 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 00:37:13,872 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:37:13" (1/1) ... [2023-09-01 00:37:13,873 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@350cb77b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:37:13, skipping insertion in model container [2023-09-01 00:37:13,873 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:37:13" (1/1) ... [2023-09-01 00:37:13,878 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 00:37:13,915 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 00:37:14,186 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_24-sound_lock_racing.i[30176,30189] [2023-09-01 00:37:14,211 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 00:37:14,224 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 00:37:14,265 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_24-sound_lock_racing.i[30176,30189] [2023-09-01 00:37:14,282 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 00:37:14,326 INFO L208 MainTranslator]: Completed translation [2023-09-01 00:37:14,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:37:14 WrapperNode [2023-09-01 00:37:14,327 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 00:37:14,328 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 00:37:14,328 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 00:37:14,328 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 00:37:14,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:37:14" (1/1) ... [2023-09-01 00:37:14,365 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:37:14" (1/1) ... [2023-09-01 00:37:14,396 INFO L138 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 86 [2023-09-01 00:37:14,396 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 00:37:14,397 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 00:37:14,398 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 00:37:14,398 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 00:37:14,405 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:37:14" (1/1) ... [2023-09-01 00:37:14,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:37:14" (1/1) ... [2023-09-01 00:37:14,422 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:37:14" (1/1) ... [2023-09-01 00:37:14,423 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:37:14" (1/1) ... [2023-09-01 00:37:14,428 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:37:14" (1/1) ... [2023-09-01 00:37:14,435 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:37:14" (1/1) ... [2023-09-01 00:37:14,442 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:37:14" (1/1) ... [2023-09-01 00:37:14,452 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:37:14" (1/1) ... [2023-09-01 00:37:14,454 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 00:37:14,455 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 00:37:14,457 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 00:37:14,458 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 00:37:14,459 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:37:14" (1/1) ... [2023-09-01 00:37:14,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 00:37:14,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:37:14,490 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) [2023-09-01 00:37:14,502 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 [2023-09-01 00:37:14,528 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 00:37:14,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 00:37:14,529 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 00:37:14,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 00:37:14,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 00:37:14,529 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-09-01 00:37:14,530 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-09-01 00:37:14,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 00:37:14,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 00:37:14,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 00:37:14,530 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 00:37:14,531 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 00:37:14,687 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 00:37:14,688 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 00:37:14,984 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 00:37:14,990 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 00:37:14,992 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-09-01 00:37:14,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:37:14 BoogieIcfgContainer [2023-09-01 00:37:14,995 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 00:37:14,997 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 00:37:14,997 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 00:37:15,000 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 00:37:15,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 12:37:13" (1/3) ... [2023-09-01 00:37:15,001 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@585d6c32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:37:15, skipping insertion in model container [2023-09-01 00:37:15,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:37:14" (2/3) ... [2023-09-01 00:37:15,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@585d6c32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:37:15, skipping insertion in model container [2023-09-01 00:37:15,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:37:14" (3/3) ... [2023-09-01 00:37:15,003 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_24-sound_lock_racing.i [2023-09-01 00:37:15,019 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 00:37:15,019 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-09-01 00:37:15,019 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 00:37:15,085 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-09-01 00:37:15,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 122 transitions, 252 flow [2023-09-01 00:37:15,181 INFO L130 PetriNetUnfolder]: 18/162 cut-off events. [2023-09-01 00:37:15,182 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 00:37:15,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 162 events. 18/162 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 380 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 82. Up to 4 conditions per place. [2023-09-01 00:37:15,188 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 122 transitions, 252 flow [2023-09-01 00:37:15,193 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 108 places, 117 transitions, 239 flow [2023-09-01 00:37:15,196 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:37:15,203 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 108 places, 117 transitions, 239 flow [2023-09-01 00:37:15,205 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 108 places, 117 transitions, 239 flow [2023-09-01 00:37:15,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 117 transitions, 239 flow [2023-09-01 00:37:15,234 INFO L130 PetriNetUnfolder]: 17/157 cut-off events. [2023-09-01 00:37:15,234 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:37:15,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 157 events. 17/157 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 361 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 82. Up to 4 conditions per place. [2023-09-01 00:37:15,237 INFO L119 LiptonReduction]: Number of co-enabled transitions 2576 [2023-09-01 00:37:19,006 INFO L134 LiptonReduction]: Checked pairs total: 4635 [2023-09-01 00:37:19,006 INFO L136 LiptonReduction]: Total number of compositions: 104 [2023-09-01 00:37:19,020 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:37:19,026 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=All, 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;@59188ff6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:37:19,027 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:37:19,036 INFO L130 PetriNetUnfolder]: 3/33 cut-off events. [2023-09-01 00:37:19,036 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:37:19,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:37:19,037 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-09-01 00:37:19,037 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:37:19,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:37:19,049 INFO L85 PathProgramCache]: Analyzing trace with hash 824829685, now seen corresponding path program 1 times [2023-09-01 00:37:19,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:37:19,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944498152] [2023-09-01 00:37:19,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:37:19,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:37:19,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:37:19,270 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:37:19,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:37:19,346 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:37:19,347 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:37:19,349 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:37:19,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 00:37:19,351 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:37:19,358 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:37:19,359 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:37:19,359 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-09-01 00:37:19,382 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 00:37:19,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 152 transitions, 322 flow [2023-09-01 00:37:19,428 INFO L130 PetriNetUnfolder]: 32/261 cut-off events. [2023-09-01 00:37:19,429 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 00:37:19,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275 conditions, 261 events. 32/261 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 768 event pairs, 0 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 164. Up to 8 conditions per place. [2023-09-01 00:37:19,431 INFO L82 GeneralOperation]: Start removeDead. Operand has 137 places, 152 transitions, 322 flow [2023-09-01 00:37:19,433 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 137 places, 152 transitions, 322 flow [2023-09-01 00:37:19,433 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:37:19,434 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 137 places, 152 transitions, 322 flow [2023-09-01 00:37:19,434 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 137 places, 152 transitions, 322 flow [2023-09-01 00:37:19,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 152 transitions, 322 flow [2023-09-01 00:37:19,477 INFO L130 PetriNetUnfolder]: 32/261 cut-off events. [2023-09-01 00:37:19,478 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 00:37:19,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275 conditions, 261 events. 32/261 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 768 event pairs, 0 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 164. Up to 8 conditions per place. [2023-09-01 00:37:19,484 INFO L119 LiptonReduction]: Number of co-enabled transitions 7336 [2023-09-01 00:37:23,233 INFO L134 LiptonReduction]: Checked pairs total: 18719 [2023-09-01 00:37:23,233 INFO L136 LiptonReduction]: Total number of compositions: 117 [2023-09-01 00:37:23,235 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:37:23,236 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=All, 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;@59188ff6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:37:23,237 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:37:23,243 INFO L130 PetriNetUnfolder]: 12/73 cut-off events. [2023-09-01 00:37:23,243 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 00:37:23,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:37:23,243 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-09-01 00:37:23,244 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:37:23,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:37:23,244 INFO L85 PathProgramCache]: Analyzing trace with hash -699790832, now seen corresponding path program 1 times [2023-09-01 00:37:23,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:37:23,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463457540] [2023-09-01 00:37:23,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:37:23,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:37:23,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:37:23,269 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:37:23,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:37:23,295 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:37:23,295 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:37:23,295 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:37:23,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 00:37:23,296 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:37:23,297 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:37:23,297 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:37:23,297 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-09-01 00:37:23,320 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 00:37:23,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 182 transitions, 394 flow [2023-09-01 00:37:23,368 INFO L130 PetriNetUnfolder]: 51/401 cut-off events. [2023-09-01 00:37:23,368 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-09-01 00:37:23,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 429 conditions, 401 events. 51/401 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1347 event pairs, 1 based on Foata normal form. 0/310 useless extension candidates. Maximal degree in co-relation 269. Up to 16 conditions per place. [2023-09-01 00:37:23,377 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 182 transitions, 394 flow [2023-09-01 00:37:23,381 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 182 transitions, 394 flow [2023-09-01 00:37:23,381 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:37:23,382 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 162 places, 182 transitions, 394 flow [2023-09-01 00:37:23,388 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 162 places, 182 transitions, 394 flow [2023-09-01 00:37:23,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 182 transitions, 394 flow [2023-09-01 00:37:23,437 INFO L130 PetriNetUnfolder]: 51/401 cut-off events. [2023-09-01 00:37:23,437 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-09-01 00:37:23,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 429 conditions, 401 events. 51/401 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1347 event pairs, 1 based on Foata normal form. 0/310 useless extension candidates. Maximal degree in co-relation 269. Up to 16 conditions per place. [2023-09-01 00:37:23,451 INFO L119 LiptonReduction]: Number of co-enabled transitions 13608 [2023-09-01 00:37:27,264 INFO L134 LiptonReduction]: Checked pairs total: 39206 [2023-09-01 00:37:27,265 INFO L136 LiptonReduction]: Total number of compositions: 135 [2023-09-01 00:37:27,266 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:37:27,268 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=All, 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;@59188ff6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:37:27,268 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:37:27,276 INFO L130 PetriNetUnfolder]: 19/108 cut-off events. [2023-09-01 00:37:27,277 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-09-01 00:37:27,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:37:27,277 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-09-01 00:37:27,277 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:37:27,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:37:27,278 INFO L85 PathProgramCache]: Analyzing trace with hash 709592779, now seen corresponding path program 1 times [2023-09-01 00:37:27,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:37:27,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443631356] [2023-09-01 00:37:27,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:37:27,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:37:27,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:37:27,302 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:37:27,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:37:27,343 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:37:27,350 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:37:27,351 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:37:27,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 00:37:27,351 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:37:27,352 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:37:27,352 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:37:27,352 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-09-01 00:37:27,372 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-09-01 00:37:27,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 187 places, 212 transitions, 468 flow [2023-09-01 00:37:27,456 INFO L130 PetriNetUnfolder]: 82/625 cut-off events. [2023-09-01 00:37:27,456 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-09-01 00:37:27,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 680 conditions, 625 events. 82/625 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2516 event pairs, 6 based on Foata normal form. 0/480 useless extension candidates. Maximal degree in co-relation 421. Up to 32 conditions per place. [2023-09-01 00:37:27,462 INFO L82 GeneralOperation]: Start removeDead. Operand has 187 places, 212 transitions, 468 flow [2023-09-01 00:37:27,466 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 187 places, 212 transitions, 468 flow [2023-09-01 00:37:27,466 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:37:27,467 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 187 places, 212 transitions, 468 flow [2023-09-01 00:37:27,467 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 187 places, 212 transitions, 468 flow [2023-09-01 00:37:27,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 187 places, 212 transitions, 468 flow [2023-09-01 00:37:27,542 INFO L130 PetriNetUnfolder]: 82/625 cut-off events. [2023-09-01 00:37:27,542 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-09-01 00:37:27,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 680 conditions, 625 events. 82/625 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2516 event pairs, 6 based on Foata normal form. 0/480 useless extension candidates. Maximal degree in co-relation 421. Up to 32 conditions per place. [2023-09-01 00:37:27,563 INFO L119 LiptonReduction]: Number of co-enabled transitions 21616 [2023-09-01 00:37:31,016 INFO L134 LiptonReduction]: Checked pairs total: 65494 [2023-09-01 00:37:31,016 INFO L136 LiptonReduction]: Total number of compositions: 149 [2023-09-01 00:37:31,018 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:37:31,019 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=All, 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;@59188ff6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:37:31,019 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:37:31,033 INFO L130 PetriNetUnfolder]: 29/157 cut-off events. [2023-09-01 00:37:31,033 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-09-01 00:37:31,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:37:31,033 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-09-01 00:37:31,033 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:37:31,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:37:31,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1945548830, now seen corresponding path program 1 times [2023-09-01 00:37:31,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:37:31,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106175120] [2023-09-01 00:37:31,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:37:31,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:37:31,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:37:31,080 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:37:31,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:37:31,113 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:37:31,116 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:37:31,117 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:37:31,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 00:37:31,117 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:37:31,118 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:37:31,118 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:37:31,118 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-09-01 00:37:31,148 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-09-01 00:37:31,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 212 places, 242 transitions, 544 flow [2023-09-01 00:37:31,306 INFO L130 PetriNetUnfolder]: 141/1021 cut-off events. [2023-09-01 00:37:31,306 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-09-01 00:37:31,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1132 conditions, 1021 events. 141/1021 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5032 event pairs, 23 based on Foata normal form. 0/782 useless extension candidates. Maximal degree in co-relation 670. Up to 80 conditions per place. [2023-09-01 00:37:31,319 INFO L82 GeneralOperation]: Start removeDead. Operand has 212 places, 242 transitions, 544 flow [2023-09-01 00:37:31,327 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 212 places, 242 transitions, 544 flow [2023-09-01 00:37:31,328 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:37:31,328 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 212 places, 242 transitions, 544 flow [2023-09-01 00:37:31,328 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 212 places, 242 transitions, 544 flow [2023-09-01 00:37:31,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 212 places, 242 transitions, 544 flow [2023-09-01 00:37:31,463 INFO L130 PetriNetUnfolder]: 141/1021 cut-off events. [2023-09-01 00:37:31,463 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-09-01 00:37:31,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1132 conditions, 1021 events. 141/1021 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5032 event pairs, 23 based on Foata normal form. 0/782 useless extension candidates. Maximal degree in co-relation 670. Up to 80 conditions per place. [2023-09-01 00:37:31,498 INFO L119 LiptonReduction]: Number of co-enabled transitions 31360 [2023-09-01 00:37:35,312 INFO L134 LiptonReduction]: Checked pairs total: 98459 [2023-09-01 00:37:35,312 INFO L136 LiptonReduction]: Total number of compositions: 163 [2023-09-01 00:37:35,314 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:37:35,318 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=All, 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;@59188ff6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:37:35,318 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:37:35,334 INFO L130 PetriNetUnfolder]: 41/216 cut-off events. [2023-09-01 00:37:35,334 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2023-09-01 00:37:35,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:37:35,334 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:37:35,335 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:37:35,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:37:35,335 INFO L85 PathProgramCache]: Analyzing trace with hash -975400389, now seen corresponding path program 1 times [2023-09-01 00:37:35,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:37:35,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458962592] [2023-09-01 00:37:35,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:37:35,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:37:35,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:37:35,379 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:37:35,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:37:35,428 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:37:35,428 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:37:35,428 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:37:35,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 00:37:35,428 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:37:35,429 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:37:35,429 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:37:35,429 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-09-01 00:37:35,451 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2023-09-01 00:37:35,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 272 transitions, 622 flow [2023-09-01 00:37:35,727 INFO L130 PetriNetUnfolder]: 264/1769 cut-off events. [2023-09-01 00:37:35,727 INFO L131 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2023-09-01 00:37:35,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2001 conditions, 1769 events. 264/1769 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 10756 event pairs, 72 based on Foata normal form. 0/1356 useless extension candidates. Maximal degree in co-relation 1120. Up to 192 conditions per place. [2023-09-01 00:37:35,746 INFO L82 GeneralOperation]: Start removeDead. Operand has 237 places, 272 transitions, 622 flow [2023-09-01 00:37:35,759 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 237 places, 272 transitions, 622 flow [2023-09-01 00:37:35,760 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:37:35,760 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 237 places, 272 transitions, 622 flow [2023-09-01 00:37:35,760 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 237 places, 272 transitions, 622 flow [2023-09-01 00:37:35,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 272 transitions, 622 flow [2023-09-01 00:37:36,002 INFO L130 PetriNetUnfolder]: 264/1769 cut-off events. [2023-09-01 00:37:36,003 INFO L131 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2023-09-01 00:37:36,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2001 conditions, 1769 events. 264/1769 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 10756 event pairs, 72 based on Foata normal form. 0/1356 useless extension candidates. Maximal degree in co-relation 1120. Up to 192 conditions per place. [2023-09-01 00:37:36,073 INFO L119 LiptonReduction]: Number of co-enabled transitions 42840 [2023-09-01 00:37:39,913 INFO L134 LiptonReduction]: Checked pairs total: 138169 [2023-09-01 00:37:39,913 INFO L136 LiptonReduction]: Total number of compositions: 180 [2023-09-01 00:37:39,915 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:37:39,915 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@59188ff6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:37:39,915 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:37:39,935 INFO L130 PetriNetUnfolder]: 56/289 cut-off events. [2023-09-01 00:37:39,935 INFO L131 PetriNetUnfolder]: For 79/79 co-relation queries the response was YES. [2023-09-01 00:37:39,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:37:39,935 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:37:39,936 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:37:39,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:37:39,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1815999019, now seen corresponding path program 1 times [2023-09-01 00:37:39,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:37:39,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410505079] [2023-09-01 00:37:39,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:37:39,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:37:39,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:37:39,985 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:37:39,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:37:40,004 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:37:40,004 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:37:40,005 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:37:40,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 00:37:40,005 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:37:40,006 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:37:40,006 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:37:40,006 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-09-01 00:37:40,035 INFO L144 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2023-09-01 00:37:40,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 262 places, 302 transitions, 702 flow [2023-09-01 00:37:40,579 INFO L130 PetriNetUnfolder]: 531/3237 cut-off events. [2023-09-01 00:37:40,579 INFO L131 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2023-09-01 00:37:40,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3735 conditions, 3237 events. 531/3237 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 24100 event pairs, 201 based on Foata normal form. 0/2490 useless extension candidates. Maximal degree in co-relation 1987. Up to 448 conditions per place. [2023-09-01 00:37:40,625 INFO L82 GeneralOperation]: Start removeDead. Operand has 262 places, 302 transitions, 702 flow [2023-09-01 00:37:40,648 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 262 places, 302 transitions, 702 flow [2023-09-01 00:37:40,648 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:37:40,648 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 262 places, 302 transitions, 702 flow [2023-09-01 00:37:40,649 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 262 places, 302 transitions, 702 flow [2023-09-01 00:37:40,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 262 places, 302 transitions, 702 flow [2023-09-01 00:37:41,307 INFO L130 PetriNetUnfolder]: 531/3237 cut-off events. [2023-09-01 00:37:41,307 INFO L131 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2023-09-01 00:37:41,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3735 conditions, 3237 events. 531/3237 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 24100 event pairs, 201 based on Foata normal form. 0/2490 useless extension candidates. Maximal degree in co-relation 1987. Up to 448 conditions per place. [2023-09-01 00:37:41,461 INFO L119 LiptonReduction]: Number of co-enabled transitions 56056 [2023-09-01 00:37:45,363 INFO L134 LiptonReduction]: Checked pairs total: 182556 [2023-09-01 00:37:45,363 INFO L136 LiptonReduction]: Total number of compositions: 193 [2023-09-01 00:37:45,365 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:37:45,366 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=All, 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;@59188ff6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:37:45,366 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:37:45,399 INFO L130 PetriNetUnfolder]: 76/386 cut-off events. [2023-09-01 00:37:45,400 INFO L131 PetriNetUnfolder]: For 129/129 co-relation queries the response was YES. [2023-09-01 00:37:45,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:37:45,400 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:37:45,400 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:37:45,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:37:45,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1181563219, now seen corresponding path program 1 times [2023-09-01 00:37:45,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:37:45,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294673724] [2023-09-01 00:37:45,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:37:45,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:37:45,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:37:45,437 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:37:45,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:37:45,473 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:37:45,473 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:37:45,473 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:37:45,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 00:37:45,474 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:37:45,474 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:37:45,475 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:37:45,475 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-09-01 00:37:45,504 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-09-01 00:37:45,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 287 places, 332 transitions, 784 flow [2023-09-01 00:37:46,462 INFO L130 PetriNetUnfolder]: 1118/6177 cut-off events. [2023-09-01 00:37:46,463 INFO L131 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2023-09-01 00:37:46,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7262 conditions, 6177 events. 1118/6177 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 54776 event pairs, 522 based on Foata normal form. 0/4776 useless extension candidates. Maximal degree in co-relation 3719. Up to 1024 conditions per place. [2023-09-01 00:37:46,537 INFO L82 GeneralOperation]: Start removeDead. Operand has 287 places, 332 transitions, 784 flow [2023-09-01 00:37:46,582 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 287 places, 332 transitions, 784 flow [2023-09-01 00:37:46,583 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:37:46,583 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 287 places, 332 transitions, 784 flow [2023-09-01 00:37:46,583 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 287 places, 332 transitions, 784 flow [2023-09-01 00:37:46,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 287 places, 332 transitions, 784 flow [2023-09-01 00:37:47,731 INFO L130 PetriNetUnfolder]: 1118/6177 cut-off events. [2023-09-01 00:37:47,731 INFO L131 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2023-09-01 00:37:47,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7262 conditions, 6177 events. 1118/6177 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 54776 event pairs, 522 based on Foata normal form. 0/4776 useless extension candidates. Maximal degree in co-relation 3719. Up to 1024 conditions per place. [2023-09-01 00:37:47,985 INFO L119 LiptonReduction]: Number of co-enabled transitions 71008 [2023-09-01 00:37:52,000 INFO L134 LiptonReduction]: Checked pairs total: 237349 [2023-09-01 00:37:52,000 INFO L136 LiptonReduction]: Total number of compositions: 208 [2023-09-01 00:37:52,001 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:37:52,001 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=All, 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;@59188ff6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:37:52,002 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:37:52,040 INFO L130 PetriNetUnfolder]: 105/520 cut-off events. [2023-09-01 00:37:52,040 INFO L131 PetriNetUnfolder]: For 202/202 co-relation queries the response was YES. [2023-09-01 00:37:52,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:37:52,041 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:37:52,041 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:37:52,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:37:52,041 INFO L85 PathProgramCache]: Analyzing trace with hash -100009284, now seen corresponding path program 1 times [2023-09-01 00:37:52,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:37:52,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680163917] [2023-09-01 00:37:52,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:37:52,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:37:52,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:37:52,065 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:37:52,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:37:52,087 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:37:52,087 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:37:52,088 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:37:52,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 00:37:52,088 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:37:52,090 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:37:52,090 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:37:52,090 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-09-01 00:37:52,117 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-09-01 00:37:52,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 312 places, 362 transitions, 868 flow [2023-09-01 00:37:54,138 INFO L130 PetriNetUnfolder]: 2409/12125 cut-off events. [2023-09-01 00:37:54,138 INFO L131 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2023-09-01 00:37:54,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14502 conditions, 12125 events. 2409/12125 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 123693 event pairs, 1291 based on Foata normal form. 0/9430 useless extension candidates. Maximal degree in co-relation 7244. Up to 2304 conditions per place. [2023-09-01 00:37:54,293 INFO L82 GeneralOperation]: Start removeDead. Operand has 312 places, 362 transitions, 868 flow [2023-09-01 00:37:54,370 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 312 places, 362 transitions, 868 flow [2023-09-01 00:37:54,370 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:37:54,370 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 312 places, 362 transitions, 868 flow [2023-09-01 00:37:54,370 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 312 places, 362 transitions, 868 flow [2023-09-01 00:37:54,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 312 places, 362 transitions, 868 flow [2023-09-01 00:37:56,312 INFO L130 PetriNetUnfolder]: 2409/12125 cut-off events. [2023-09-01 00:37:56,312 INFO L131 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2023-09-01 00:37:56,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14502 conditions, 12125 events. 2409/12125 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 123693 event pairs, 1291 based on Foata normal form. 0/9430 useless extension candidates. Maximal degree in co-relation 7244. Up to 2304 conditions per place. [2023-09-01 00:37:56,867 INFO L119 LiptonReduction]: Number of co-enabled transitions 87696 [2023-09-01 00:38:00,917 INFO L134 LiptonReduction]: Checked pairs total: 292808 [2023-09-01 00:38:00,918 INFO L136 LiptonReduction]: Total number of compositions: 222 [2023-09-01 00:38:00,920 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:38:00,921 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=All, 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;@59188ff6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:38:00,921 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:38:00,987 INFO L130 PetriNetUnfolder]: 159/734 cut-off events. [2023-09-01 00:38:00,987 INFO L131 PetriNetUnfolder]: For 309/309 co-relation queries the response was YES. [2023-09-01 00:38:00,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:38:00,987 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:38:00,987 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:38:00,988 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:38:00,988 INFO L85 PathProgramCache]: Analyzing trace with hash -981641304, now seen corresponding path program 1 times [2023-09-01 00:38:00,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:38:00,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537258315] [2023-09-01 00:38:00,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:38:00,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:38:01,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:38:01,024 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:38:01,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:38:01,057 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:38:01,058 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:38:01,058 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:38:01,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 00:38:01,058 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:38:01,061 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:38:01,062 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:38:01,062 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-09-01 00:38:01,098 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2023-09-01 00:38:01,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 337 places, 392 transitions, 954 flow [2023-09-01 00:38:05,300 INFO L130 PetriNetUnfolder]: 5236/24217 cut-off events. [2023-09-01 00:38:05,300 INFO L131 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2023-09-01 00:38:05,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29423 conditions, 24217 events. 5236/24217 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 280185 event pairs, 3084 based on Foata normal form. 0/18948 useless extension candidates. Maximal degree in co-relation 14482. Up to 5120 conditions per place. [2023-09-01 00:38:05,675 INFO L82 GeneralOperation]: Start removeDead. Operand has 337 places, 392 transitions, 954 flow [2023-09-01 00:38:05,994 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 337 places, 392 transitions, 954 flow [2023-09-01 00:38:05,995 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:38:05,995 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 337 places, 392 transitions, 954 flow [2023-09-01 00:38:05,995 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 337 places, 392 transitions, 954 flow [2023-09-01 00:38:05,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 337 places, 392 transitions, 954 flow [2023-09-01 00:38:10,363 INFO L130 PetriNetUnfolder]: 5236/24217 cut-off events. [2023-09-01 00:38:10,363 INFO L131 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2023-09-01 00:38:10,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29423 conditions, 24217 events. 5236/24217 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 280185 event pairs, 3084 based on Foata normal form. 0/18948 useless extension candidates. Maximal degree in co-relation 14482. Up to 5120 conditions per place. [2023-09-01 00:38:11,575 INFO L119 LiptonReduction]: Number of co-enabled transitions 106120 [2023-09-01 00:38:15,737 INFO L134 LiptonReduction]: Checked pairs total: 363142 [2023-09-01 00:38:15,737 INFO L136 LiptonReduction]: Total number of compositions: 237 [2023-09-01 00:38:15,738 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:38:15,739 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=All, 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;@59188ff6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:38:15,739 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:38:15,808 INFO L130 PetriNetUnfolder]: 234/1030 cut-off events. [2023-09-01 00:38:15,808 INFO L131 PetriNetUnfolder]: For 469/469 co-relation queries the response was YES. [2023-09-01 00:38:15,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:38:15,808 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:38:15,809 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:38:15,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:38:15,809 INFO L85 PathProgramCache]: Analyzing trace with hash 988792464, now seen corresponding path program 1 times [2023-09-01 00:38:15,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:38:15,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533864973] [2023-09-01 00:38:15,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:38:15,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:38:15,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:38:15,834 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:38:15,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:38:15,855 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:38:15,855 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:38:15,855 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:38:15,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 00:38:15,856 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:38:15,856 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:38:15,856 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:38:15,856 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-09-01 00:38:15,885 INFO L144 ThreadInstanceAdder]: Constructed 11 joinOtherThreadTransitions. [2023-09-01 00:38:15,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 362 places, 422 transitions, 1042 flow [2023-09-01 00:38:27,791 INFO L130 PetriNetUnfolder]: 11391/48853 cut-off events. [2023-09-01 00:38:27,792 INFO L131 PetriNetUnfolder]: For 11539/11539 co-relation queries the response was YES. [2023-09-01 00:38:28,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60217 conditions, 48853 events. 11391/48853 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 1152. Compared 631936 event pairs, 7181 based on Foata normal form. 0/38450 useless extension candidates. Maximal degree in co-relation 29401. Up to 11264 conditions per place. [2023-09-01 00:38:28,975 INFO L82 GeneralOperation]: Start removeDead. Operand has 362 places, 422 transitions, 1042 flow [2023-09-01 00:38:29,808 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 362 places, 422 transitions, 1042 flow [2023-09-01 00:38:29,808 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:38:29,808 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 362 places, 422 transitions, 1042 flow [2023-09-01 00:38:29,808 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 362 places, 422 transitions, 1042 flow [2023-09-01 00:38:29,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 362 places, 422 transitions, 1042 flow [2023-09-01 00:38:39,472 INFO L130 PetriNetUnfolder]: 11391/48853 cut-off events. [2023-09-01 00:38:39,472 INFO L131 PetriNetUnfolder]: For 11539/11539 co-relation queries the response was YES. [2023-09-01 00:38:40,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60217 conditions, 48853 events. 11391/48853 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 1152. Compared 631936 event pairs, 7181 based on Foata normal form. 0/38450 useless extension candidates. Maximal degree in co-relation 29401. Up to 11264 conditions per place. [2023-09-01 00:38:42,866 INFO L119 LiptonReduction]: Number of co-enabled transitions 126280 [2023-09-01 00:38:47,414 INFO L134 LiptonReduction]: Checked pairs total: 434891 [2023-09-01 00:38:47,414 INFO L136 LiptonReduction]: Total number of compositions: 252 [2023-09-01 00:38:47,415 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:38:47,415 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=All, 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;@59188ff6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:38:47,415 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:38:47,537 INFO L130 PetriNetUnfolder]: 360/1483 cut-off events. [2023-09-01 00:38:47,537 INFO L131 PetriNetUnfolder]: For 713/713 co-relation queries the response was YES. [2023-09-01 00:38:47,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:38:47,537 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:38:47,537 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:38:47,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:38:47,538 INFO L85 PathProgramCache]: Analyzing trace with hash -858251438, now seen corresponding path program 1 times [2023-09-01 00:38:47,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:38:47,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147370832] [2023-09-01 00:38:47,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:38:47,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:38:47,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:38:47,580 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:38:47,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:38:47,610 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:38:47,610 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:38:47,610 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:38:47,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-09-01 00:38:47,610 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:38:47,612 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:38:47,612 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:38:47,613 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-09-01 00:38:47,641 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2023-09-01 00:38:47,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 387 places, 452 transitions, 1132 flow [2023-09-01 00:39:08,875 INFO L130 PetriNetUnfolder]: 24714/99089 cut-off events. [2023-09-01 00:39:08,875 INFO L131 PetriNetUnfolder]: For 24928/24928 co-relation queries the response was YES. [2023-09-01 00:39:13,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123780 conditions, 99089 events. 24714/99089 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 2271. Compared 1393041 event pairs, 16398 based on Foata normal form. 0/78432 useless extension candidates. Maximal degree in co-relation 60193. Up to 24576 conditions per place. [2023-09-01 00:39:13,693 INFO L82 GeneralOperation]: Start removeDead. Operand has 387 places, 452 transitions, 1132 flow [2023-09-01 00:39:15,639 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 387 places, 452 transitions, 1132 flow [2023-09-01 00:39:15,640 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:39:15,640 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 387 places, 452 transitions, 1132 flow [2023-09-01 00:39:15,640 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 387 places, 452 transitions, 1132 flow [2023-09-01 00:39:15,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 387 places, 452 transitions, 1132 flow [2023-09-01 00:39:38,023 INFO L130 PetriNetUnfolder]: 24714/99089 cut-off events. [2023-09-01 00:39:38,024 INFO L131 PetriNetUnfolder]: For 24928/24928 co-relation queries the response was YES. [2023-09-01 00:39:42,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123780 conditions, 99089 events. 24714/99089 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 2271. Compared 1393041 event pairs, 16398 based on Foata normal form. 0/78432 useless extension candidates. Maximal degree in co-relation 60193. Up to 24576 conditions per place. [2023-09-01 00:39:49,244 INFO L119 LiptonReduction]: Number of co-enabled transitions 148176 [2023-09-01 00:39:53,383 INFO L134 LiptonReduction]: Checked pairs total: 461351 [2023-09-01 00:39:53,383 INFO L136 LiptonReduction]: Total number of compositions: 268 [2023-09-01 00:39:53,384 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:39:53,386 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=All, 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;@59188ff6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:39:53,386 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:39:53,569 INFO L130 PetriNetUnfolder]: 560/2158 cut-off events. [2023-09-01 00:39:53,570 INFO L131 PetriNetUnfolder]: For 1089/1089 co-relation queries the response was YES. [2023-09-01 00:39:53,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:39:53,570 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:39:53,570 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:39:53,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:39:53,571 INFO L85 PathProgramCache]: Analyzing trace with hash 2075023940, now seen corresponding path program 1 times [2023-09-01 00:39:53,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:39:53,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194507627] [2023-09-01 00:39:53,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:39:53,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:39:53,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:39:53,596 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:39:53,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:39:53,621 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:39:53,621 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:39:53,622 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:39:53,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 00:39:53,622 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:39:53,622 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:39:53,623 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:39:53,623 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-09-01 00:39:53,653 INFO L144 ThreadInstanceAdder]: Constructed 13 joinOtherThreadTransitions. [2023-09-01 00:39:53,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 412 places, 482 transitions, 1224 flow [2023-09-01 00:40:48,989 INFO L130 PetriNetUnfolder]: 53397/201549 cut-off events. [2023-09-01 00:40:48,990 INFO L131 PetriNetUnfolder]: For 53690/53690 co-relation queries the response was YES. [2023-09-01 00:41:00,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254928 conditions, 201549 events. 53397/201549 cut-off events. For 53690/53690 co-relation queries the response was YES. Maximal size of possible extension queue 4207. Compared 3075196 event pairs, 36879 based on Foata normal form. 0/160398 useless extension candidates. Maximal degree in co-relation 123754. Up to 53248 conditions per place. [2023-09-01 00:41:00,496 INFO L82 GeneralOperation]: Start removeDead. Operand has 412 places, 482 transitions, 1224 flow [2023-09-01 00:41:05,235 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 412 places, 482 transitions, 1224 flow [2023-09-01 00:41:05,235 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:41:05,235 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 412 places, 482 transitions, 1224 flow [2023-09-01 00:41:05,236 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 412 places, 482 transitions, 1224 flow [2023-09-01 00:41:05,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 412 places, 482 transitions, 1224 flow [2023-09-01 00:41:57,025 INFO L130 PetriNetUnfolder]: 53397/201549 cut-off events. [2023-09-01 00:41:57,025 INFO L131 PetriNetUnfolder]: For 53690/53690 co-relation queries the response was YES. [2023-09-01 00:42:07,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254928 conditions, 201549 events. 53397/201549 cut-off events. For 53690/53690 co-relation queries the response was YES. Maximal size of possible extension queue 4207. Compared 3075196 event pairs, 36879 based on Foata normal form. 0/160398 useless extension candidates. Maximal degree in co-relation 123754. Up to 53248 conditions per place. [2023-09-01 00:42:31,625 INFO L119 LiptonReduction]: Number of co-enabled transitions 171808 [2023-09-01 00:42:36,766 INFO L134 LiptonReduction]: Checked pairs total: 538431 [2023-09-01 00:42:36,767 INFO L136 LiptonReduction]: Total number of compositions: 282 [2023-09-01 00:42:36,770 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:42:36,774 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=All, 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;@59188ff6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:42:36,775 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:42:37,165 INFO L130 PetriNetUnfolder]: 913/3242 cut-off events. [2023-09-01 00:42:37,165 INFO L131 PetriNetUnfolder]: For 1672/1672 co-relation queries the response was YES. [2023-09-01 00:42:37,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:42:37,166 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:42:37,166 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:42:37,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:42:37,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1332143255, now seen corresponding path program 1 times [2023-09-01 00:42:37,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:42:37,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464980737] [2023-09-01 00:42:37,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:42:37,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:42:37,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:42:37,237 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:42:37,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:42:37,283 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:42:37,292 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:42:37,292 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:42:37,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-09-01 00:42:37,292 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:42:37,293 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:42:37,294 WARN L233 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:42:37,294 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2023-09-01 00:42:37,365 INFO L144 ThreadInstanceAdder]: Constructed 14 joinOtherThreadTransitions. [2023-09-01 00:42:37,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 437 places, 512 transitions, 1318 flow