./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread-ext/26_stack_cas.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/pthread-ext/26_stack_cas.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 fa97ad6141e9aa8818b694f4968e766701fe7261f516cd86f7a15e5cf1a3d14d --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 [2023-08-31 22:35:35,436 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 22:35:35,438 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 22:35:35,481 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 22:35:35,482 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 22:35:35,485 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 22:35:35,486 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 22:35:35,489 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 22:35:35,492 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 22:35:35,497 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 22:35:35,498 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 22:35:35,499 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 22:35:35,499 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 22:35:35,500 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 22:35:35,501 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 22:35:35,504 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 22:35:35,505 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 22:35:35,506 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 22:35:35,507 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 22:35:35,513 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 22:35:35,514 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 22:35:35,515 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 22:35:35,516 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 22:35:35,516 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 22:35:35,523 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 22:35:35,523 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 22:35:35,523 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 22:35:35,525 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 22:35:35,525 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 22:35:35,526 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 22:35:35,526 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 22:35:35,528 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 22:35:35,530 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 22:35:35,530 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 22:35:35,531 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 22:35:35,531 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 22:35:35,531 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 22:35:35,532 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 22:35:35,532 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 22:35:35,532 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 22:35:35,533 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 22:35:35,534 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-31 22:35:35,581 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 22:35:35,581 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 22:35:35,582 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 22:35:35,583 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 22:35:35,583 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 22:35:35,584 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 22:35:35,584 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 22:35:35,584 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 22:35:35,584 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 22:35:35,585 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 22:35:35,585 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 22:35:35,586 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-31 22:35:35,586 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 22:35:35,586 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 22:35:35,586 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 22:35:35,586 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-31 22:35:35,586 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-31 22:35:35,587 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-31 22:35:35,587 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 22:35:35,587 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-31 22:35:35,587 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 22:35:35,587 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 22:35:35,588 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 22:35:35,588 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 22:35:35,588 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 22:35:35,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 22:35:35,588 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 22:35:35,588 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 22:35:35,589 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 22:35:35,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 22:35:35,589 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 22:35:35,589 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 22:35:35,589 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 22:35:35,590 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 22:35:35,590 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa97ad6141e9aa8818b694f4968e766701fe7261f516cd86f7a15e5cf1a3d14d Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-08-31 22:35:35,881 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 22:35:35,902 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 22:35:35,905 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 22:35:35,906 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 22:35:35,906 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 22:35:35,907 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/26_stack_cas.i [2023-08-31 22:35:37,136 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 22:35:37,367 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 22:35:37,368 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas.i [2023-08-31 22:35:37,380 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66a53be14/b01cbaa6231847ccb5c86296a8735516/FLAG07c1eb37c [2023-08-31 22:35:37,392 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66a53be14/b01cbaa6231847ccb5c86296a8735516 [2023-08-31 22:35:37,394 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 22:35:37,396 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 22:35:37,396 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 22:35:37,397 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 22:35:37,399 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 22:35:37,400 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 10:35:37" (1/1) ... [2023-08-31 22:35:37,401 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@616a5c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:35:37, skipping insertion in model container [2023-08-31 22:35:37,401 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 10:35:37" (1/1) ... [2023-08-31 22:35:37,406 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 22:35:37,447 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 22:35:37,795 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas.i[31152,31165] [2023-08-31 22:35:37,804 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 22:35:37,817 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 22:35:37,870 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas.i[31152,31165] [2023-08-31 22:35:37,875 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 22:35:37,912 INFO L208 MainTranslator]: Completed translation [2023-08-31 22:35:37,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:35:37 WrapperNode [2023-08-31 22:35:37,913 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 22:35:37,914 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 22:35:37,914 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 22:35:37,914 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 22:35:37,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:35:37" (1/1) ... [2023-08-31 22:35:37,946 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:35:37" (1/1) ... [2023-08-31 22:35:37,976 INFO L138 Inliner]: procedures = 177, calls = 47, calls flagged for inlining = 16, calls inlined = 19, statements flattened = 190 [2023-08-31 22:35:37,977 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 22:35:37,978 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 22:35:37,978 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 22:35:37,978 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 22:35:37,986 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:35:37" (1/1) ... [2023-08-31 22:35:37,986 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:35:37" (1/1) ... [2023-08-31 22:35:37,997 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:35:37" (1/1) ... [2023-08-31 22:35:37,997 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:35:37" (1/1) ... [2023-08-31 22:35:38,006 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:35:37" (1/1) ... [2023-08-31 22:35:38,023 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:35:37" (1/1) ... [2023-08-31 22:35:38,025 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:35:37" (1/1) ... [2023-08-31 22:35:38,026 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:35:37" (1/1) ... [2023-08-31 22:35:38,029 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 22:35:38,035 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 22:35:38,035 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 22:35:38,035 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 22:35:38,036 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:35:37" (1/1) ... [2023-08-31 22:35:38,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 22:35:38,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:35:38,065 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 22:35:38,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 22:35:38,107 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 22:35:38,107 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-31 22:35:38,108 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-31 22:35:38,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 22:35:38,108 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 22:35:38,108 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 22:35:38,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 22:35:38,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 22:35:38,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 22:35:38,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 22:35:38,110 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 22:35:38,280 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 22:35:38,282 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 22:35:38,598 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 22:35:38,846 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 22:35:38,846 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-31 22:35:38,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:35:38 BoogieIcfgContainer [2023-08-31 22:35:38,848 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 22:35:38,850 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 22:35:38,850 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 22:35:38,853 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 22:35:38,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 10:35:37" (1/3) ... [2023-08-31 22:35:38,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aefbf78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 10:35:38, skipping insertion in model container [2023-08-31 22:35:38,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:35:37" (2/3) ... [2023-08-31 22:35:38,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aefbf78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 10:35:38, skipping insertion in model container [2023-08-31 22:35:38,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:35:38" (3/3) ... [2023-08-31 22:35:38,856 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas.i [2023-08-31 22:35:38,871 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 22:35:38,871 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2023-08-31 22:35:38,871 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 22:35:39,002 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:35:39,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 160 transitions, 325 flow [2023-08-31 22:35:39,173 INFO L130 PetriNetUnfolder]: 11/175 cut-off events. [2023-08-31 22:35:39,173 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:35:39,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180 conditions, 175 events. 11/175 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 331 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 135. Up to 4 conditions per place. [2023-08-31 22:35:39,180 INFO L82 GeneralOperation]: Start removeDead. Operand has 153 places, 160 transitions, 325 flow [2023-08-31 22:35:39,187 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 153 places, 160 transitions, 325 flow [2023-08-31 22:35:39,190 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:35:39,205 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 153 places, 160 transitions, 325 flow [2023-08-31 22:35:39,207 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 153 places, 160 transitions, 325 flow [2023-08-31 22:35:39,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 160 transitions, 325 flow [2023-08-31 22:35:39,235 INFO L130 PetriNetUnfolder]: 11/175 cut-off events. [2023-08-31 22:35:39,236 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:35:39,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180 conditions, 175 events. 11/175 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 331 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 135. Up to 4 conditions per place. [2023-08-31 22:35:39,239 INFO L119 LiptonReduction]: Number of co-enabled transitions 4248 [2023-08-31 22:35:44,624 INFO L134 LiptonReduction]: Checked pairs total: 8906 [2023-08-31 22:35:44,624 INFO L136 LiptonReduction]: Total number of compositions: 153 [2023-08-31 22:35:44,636 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:35:44,641 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;@4d44344f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:35:44,641 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:35:44,648 INFO L130 PetriNetUnfolder]: 2/32 cut-off events. [2023-08-31 22:35:44,648 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:35:44,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:35:44,649 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-31 22:35:44,649 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:35:44,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:35:44,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1466791183, now seen corresponding path program 1 times [2023-08-31 22:35:44,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:35:44,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194946839] [2023-08-31 22:35:44,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:35:44,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:35:44,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:35:44,751 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:35:44,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:35:44,822 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:35:44,824 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:35:44,825 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:35:44,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 22:35:44,827 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:35:44,832 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:35:44,833 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:35:44,833 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-31 22:35:44,928 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:35:44,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 265 places, 279 transitions, 570 flow [2023-08-31 22:35:45,032 INFO L130 PetriNetUnfolder]: 21/311 cut-off events. [2023-08-31 22:35:45,033 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 22:35:45,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321 conditions, 311 events. 21/311 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 937 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 253. Up to 6 conditions per place. [2023-08-31 22:35:45,039 INFO L82 GeneralOperation]: Start removeDead. Operand has 265 places, 279 transitions, 570 flow [2023-08-31 22:35:45,042 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 265 places, 279 transitions, 570 flow [2023-08-31 22:35:45,042 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:35:45,042 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 265 places, 279 transitions, 570 flow [2023-08-31 22:35:45,042 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 265 places, 279 transitions, 570 flow [2023-08-31 22:35:45,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 265 places, 279 transitions, 570 flow [2023-08-31 22:35:45,094 INFO L130 PetriNetUnfolder]: 21/311 cut-off events. [2023-08-31 22:35:45,095 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 22:35:45,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321 conditions, 311 events. 21/311 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 937 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 253. Up to 6 conditions per place. [2023-08-31 22:35:45,117 INFO L119 LiptonReduction]: Number of co-enabled transitions 36580 [2023-08-31 22:35:51,114 INFO L134 LiptonReduction]: Checked pairs total: 126176 [2023-08-31 22:35:51,115 INFO L136 LiptonReduction]: Total number of compositions: 215 [2023-08-31 22:35:51,117 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:35:51,118 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;@4d44344f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:35:51,118 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:35:51,124 INFO L130 PetriNetUnfolder]: 3/66 cut-off events. [2023-08-31 22:35:51,124 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 22:35:51,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:35:51,125 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-31 22:35:51,125 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:35:51,125 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:35:51,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1209779092, now seen corresponding path program 1 times [2023-08-31 22:35:51,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:35:51,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342255123] [2023-08-31 22:35:51,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:35:51,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:35:51,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:35:51,163 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:35:51,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:35:51,206 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:35:51,207 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:35:51,208 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:35:51,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 22:35:51,209 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:35:51,210 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:35:51,210 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:35:51,210 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-31 22:35:51,312 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:35:51,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 377 places, 398 transitions, 817 flow [2023-08-31 22:35:51,396 INFO L130 PetriNetUnfolder]: 31/447 cut-off events. [2023-08-31 22:35:51,397 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 22:35:51,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463 conditions, 447 events. 31/447 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1685 event pairs, 0 based on Foata normal form. 0/283 useless extension candidates. Maximal degree in co-relation 371. Up to 8 conditions per place. [2023-08-31 22:35:51,406 INFO L82 GeneralOperation]: Start removeDead. Operand has 377 places, 398 transitions, 817 flow [2023-08-31 22:35:51,410 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 377 places, 398 transitions, 817 flow [2023-08-31 22:35:51,411 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:35:51,411 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 377 places, 398 transitions, 817 flow [2023-08-31 22:35:51,411 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 377 places, 398 transitions, 817 flow [2023-08-31 22:35:51,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 377 places, 398 transitions, 817 flow [2023-08-31 22:35:51,513 INFO L130 PetriNetUnfolder]: 31/447 cut-off events. [2023-08-31 22:35:51,513 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 22:35:51,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463 conditions, 447 events. 31/447 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1685 event pairs, 0 based on Foata normal form. 0/283 useless extension candidates. Maximal degree in co-relation 371. Up to 8 conditions per place. [2023-08-31 22:35:51,545 INFO L119 LiptonReduction]: Number of co-enabled transitions 96996 [2023-08-31 22:35:59,841 INFO L134 LiptonReduction]: Checked pairs total: 339414 [2023-08-31 22:35:59,842 INFO L136 LiptonReduction]: Total number of compositions: 330 [2023-08-31 22:35:59,844 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:35:59,844 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;@4d44344f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:35:59,845 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:35:59,856 INFO L130 PetriNetUnfolder]: 7/126 cut-off events. [2023-08-31 22:35:59,856 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 22:35:59,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:35:59,857 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-31 22:35:59,857 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:35:59,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:35:59,858 INFO L85 PathProgramCache]: Analyzing trace with hash 899092402, now seen corresponding path program 1 times [2023-08-31 22:35:59,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:35:59,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741257578] [2023-08-31 22:35:59,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:35:59,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:35:59,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:35:59,877 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:35:59,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:35:59,894 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:35:59,894 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:35:59,894 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:35:59,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 22:35:59,895 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:35:59,895 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:35:59,895 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:35:59,895 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-31 22:35:59,994 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:35:59,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 489 places, 517 transitions, 1066 flow [2023-08-31 22:36:00,148 INFO L130 PetriNetUnfolder]: 41/583 cut-off events. [2023-08-31 22:36:00,148 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-31 22:36:00,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 606 conditions, 583 events. 41/583 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2534 event pairs, 0 based on Foata normal form. 0/366 useless extension candidates. Maximal degree in co-relation 489. Up to 10 conditions per place. [2023-08-31 22:36:00,162 INFO L82 GeneralOperation]: Start removeDead. Operand has 489 places, 517 transitions, 1066 flow [2023-08-31 22:36:00,167 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 489 places, 517 transitions, 1066 flow [2023-08-31 22:36:00,167 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:36:00,167 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 489 places, 517 transitions, 1066 flow [2023-08-31 22:36:00,167 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 489 places, 517 transitions, 1066 flow [2023-08-31 22:36:00,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 489 places, 517 transitions, 1066 flow [2023-08-31 22:36:00,313 INFO L130 PetriNetUnfolder]: 41/583 cut-off events. [2023-08-31 22:36:00,314 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-31 22:36:00,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 606 conditions, 583 events. 41/583 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2534 event pairs, 0 based on Foata normal form. 0/366 useless extension candidates. Maximal degree in co-relation 489. Up to 10 conditions per place. [2023-08-31 22:36:00,356 INFO L119 LiptonReduction]: Number of co-enabled transitions 185496 [2023-08-31 22:36:10,758 INFO L134 LiptonReduction]: Checked pairs total: 596813 [2023-08-31 22:36:10,758 INFO L136 LiptonReduction]: Total number of compositions: 419 [2023-08-31 22:36:10,760 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:36:10,761 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;@4d44344f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:36:10,762 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:36:10,798 INFO L130 PetriNetUnfolder]: 14/205 cut-off events. [2023-08-31 22:36:10,798 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-31 22:36:10,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:36:10,798 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-31 22:36:10,799 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:36:10,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:36:10,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1264261348, now seen corresponding path program 1 times [2023-08-31 22:36:10,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:36:10,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444663024] [2023-08-31 22:36:10,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:36:10,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:36:10,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:36:10,860 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:36:10,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:36:10,889 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:36:10,892 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:36:10,892 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:36:10,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 22:36:10,892 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:36:10,893 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:36:10,893 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:36:10,893 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-31 22:36:11,003 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:36:11,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 601 places, 636 transitions, 1317 flow [2023-08-31 22:36:11,230 INFO L130 PetriNetUnfolder]: 51/719 cut-off events. [2023-08-31 22:36:11,231 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-31 22:36:11,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 750 conditions, 719 events. 51/719 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3422 event pairs, 0 based on Foata normal form. 0/449 useless extension candidates. Maximal degree in co-relation 607. Up to 12 conditions per place. [2023-08-31 22:36:11,248 INFO L82 GeneralOperation]: Start removeDead. Operand has 601 places, 636 transitions, 1317 flow [2023-08-31 22:36:11,256 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 601 places, 636 transitions, 1317 flow [2023-08-31 22:36:11,256 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:36:11,256 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 601 places, 636 transitions, 1317 flow [2023-08-31 22:36:11,257 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 601 places, 636 transitions, 1317 flow [2023-08-31 22:36:11,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 601 places, 636 transitions, 1317 flow [2023-08-31 22:36:11,453 INFO L130 PetriNetUnfolder]: 51/719 cut-off events. [2023-08-31 22:36:11,453 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-31 22:36:11,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 750 conditions, 719 events. 51/719 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3422 event pairs, 0 based on Foata normal form. 0/449 useless extension candidates. Maximal degree in co-relation 607. Up to 12 conditions per place. [2023-08-31 22:36:11,522 INFO L119 LiptonReduction]: Number of co-enabled transitions 302080 [2023-08-31 22:36:24,723 INFO L134 LiptonReduction]: Checked pairs total: 936587 [2023-08-31 22:36:24,723 INFO L136 LiptonReduction]: Total number of compositions: 515 [2023-08-31 22:36:24,725 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:36:24,725 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;@4d44344f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:36:24,725 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:36:24,761 INFO L130 PetriNetUnfolder]: 22/282 cut-off events. [2023-08-31 22:36:24,761 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-31 22:36:24,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:36:24,762 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:36:24,762 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:36:24,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:36:24,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1418106041, now seen corresponding path program 1 times [2023-08-31 22:36:24,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:36:24,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860786449] [2023-08-31 22:36:24,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:36:24,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:36:24,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:36:24,783 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:36:24,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:36:24,802 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:36:24,803 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:36:24,803 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:36:24,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 22:36:24,803 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:36:24,804 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:36:24,804 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:36:24,804 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-31 22:36:24,936 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:36:24,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 713 places, 755 transitions, 1570 flow [2023-08-31 22:36:25,237 INFO L130 PetriNetUnfolder]: 61/855 cut-off events. [2023-08-31 22:36:25,237 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-31 22:36:25,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 895 conditions, 855 events. 61/855 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 4325 event pairs, 0 based on Foata normal form. 0/532 useless extension candidates. Maximal degree in co-relation 738. Up to 14 conditions per place. [2023-08-31 22:36:25,264 INFO L82 GeneralOperation]: Start removeDead. Operand has 713 places, 755 transitions, 1570 flow [2023-08-31 22:36:25,274 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 713 places, 755 transitions, 1570 flow [2023-08-31 22:36:25,275 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:36:25,275 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 713 places, 755 transitions, 1570 flow [2023-08-31 22:36:25,275 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 713 places, 755 transitions, 1570 flow [2023-08-31 22:36:25,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 713 places, 755 transitions, 1570 flow [2023-08-31 22:36:25,510 INFO L130 PetriNetUnfolder]: 61/855 cut-off events. [2023-08-31 22:36:25,511 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-31 22:36:25,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 895 conditions, 855 events. 61/855 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 4325 event pairs, 0 based on Foata normal form. 0/532 useless extension candidates. Maximal degree in co-relation 738. Up to 14 conditions per place. [2023-08-31 22:36:25,590 INFO L119 LiptonReduction]: Number of co-enabled transitions 446748 [2023-08-31 22:36:40,805 INFO L134 LiptonReduction]: Checked pairs total: 1452909 [2023-08-31 22:36:40,805 INFO L136 LiptonReduction]: Total number of compositions: 616 [2023-08-31 22:36:40,807 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:36:40,808 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;@4d44344f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:36:40,808 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:36:40,860 INFO L130 PetriNetUnfolder]: 28/358 cut-off events. [2023-08-31 22:36:40,861 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-31 22:36:40,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:36:40,861 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:36:40,861 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:36:40,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:36:40,862 INFO L85 PathProgramCache]: Analyzing trace with hash -306706194, now seen corresponding path program 1 times [2023-08-31 22:36:40,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:36:40,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56000216] [2023-08-31 22:36:40,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:36:40,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:36:40,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:36:40,886 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:36:40,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:36:40,907 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:36:40,908 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:36:40,908 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:36:40,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 22:36:40,908 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:36:40,909 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:36:40,909 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:36:40,909 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-31 22:36:41,054 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:36:41,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 825 places, 874 transitions, 1825 flow [2023-08-31 22:36:41,459 INFO L130 PetriNetUnfolder]: 71/991 cut-off events. [2023-08-31 22:36:41,459 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-31 22:36:41,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1041 conditions, 991 events. 71/991 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 5271 event pairs, 0 based on Foata normal form. 0/615 useless extension candidates. Maximal degree in co-relation 881. Up to 16 conditions per place. [2023-08-31 22:36:41,495 INFO L82 GeneralOperation]: Start removeDead. Operand has 825 places, 874 transitions, 1825 flow [2023-08-31 22:36:41,509 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 825 places, 874 transitions, 1825 flow [2023-08-31 22:36:41,509 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:36:41,509 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 825 places, 874 transitions, 1825 flow [2023-08-31 22:36:41,510 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 825 places, 874 transitions, 1825 flow [2023-08-31 22:36:41,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 825 places, 874 transitions, 1825 flow [2023-08-31 22:36:41,866 INFO L130 PetriNetUnfolder]: 71/991 cut-off events. [2023-08-31 22:36:41,866 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-31 22:36:41,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1041 conditions, 991 events. 71/991 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 5271 event pairs, 0 based on Foata normal form. 0/615 useless extension candidates. Maximal degree in co-relation 881. Up to 16 conditions per place. [2023-08-31 22:36:41,959 INFO L119 LiptonReduction]: Number of co-enabled transitions 619500 [2023-08-31 22:36:59,270 INFO L134 LiptonReduction]: Checked pairs total: 2263952 [2023-08-31 22:36:59,270 INFO L136 LiptonReduction]: Total number of compositions: 694 [2023-08-31 22:36:59,272 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:36:59,273 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;@4d44344f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:36:59,273 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:36:59,386 INFO L130 PetriNetUnfolder]: 35/435 cut-off events. [2023-08-31 22:36:59,386 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-31 22:36:59,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:36:59,387 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:36:59,387 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:36:59,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:36:59,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1672351494, now seen corresponding path program 1 times [2023-08-31 22:36:59,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:36:59,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890898739] [2023-08-31 22:36:59,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:36:59,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:36:59,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:36:59,432 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:36:59,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:36:59,464 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:36:59,465 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:36:59,465 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:36:59,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 22:36:59,465 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:36:59,466 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:36:59,466 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:36:59,466 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-08-31 22:36:59,637 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:36:59,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 937 places, 993 transitions, 2082 flow [2023-08-31 22:37:00,111 INFO L130 PetriNetUnfolder]: 81/1127 cut-off events. [2023-08-31 22:37:00,112 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-31 22:37:00,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1188 conditions, 1127 events. 81/1127 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 6169 event pairs, 0 based on Foata normal form. 0/698 useless extension candidates. Maximal degree in co-relation 1025. Up to 18 conditions per place. [2023-08-31 22:37:00,150 INFO L82 GeneralOperation]: Start removeDead. Operand has 937 places, 993 transitions, 2082 flow [2023-08-31 22:37:00,162 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 937 places, 993 transitions, 2082 flow [2023-08-31 22:37:00,163 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:37:00,163 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 937 places, 993 transitions, 2082 flow [2023-08-31 22:37:00,163 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 937 places, 993 transitions, 2082 flow [2023-08-31 22:37:00,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 937 places, 993 transitions, 2082 flow [2023-08-31 22:37:00,642 INFO L130 PetriNetUnfolder]: 81/1127 cut-off events. [2023-08-31 22:37:00,642 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-31 22:37:00,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1188 conditions, 1127 events. 81/1127 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 6169 event pairs, 0 based on Foata normal form. 0/698 useless extension candidates. Maximal degree in co-relation 1025. Up to 18 conditions per place. [2023-08-31 22:37:00,801 INFO L119 LiptonReduction]: Number of co-enabled transitions 820336 [2023-08-31 22:37:20,402 INFO L134 LiptonReduction]: Checked pairs total: 2694040 [2023-08-31 22:37:20,402 INFO L136 LiptonReduction]: Total number of compositions: 796 [2023-08-31 22:37:20,404 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:37:20,404 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;@4d44344f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:37:20,405 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:37:20,537 INFO L130 PetriNetUnfolder]: 43/514 cut-off events. [2023-08-31 22:37:20,537 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-31 22:37:20,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:37:20,538 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:37:20,538 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:37:20,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:37:20,539 INFO L85 PathProgramCache]: Analyzing trace with hash 24339606, now seen corresponding path program 1 times [2023-08-31 22:37:20,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:37:20,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087503735] [2023-08-31 22:37:20,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:37:20,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:37:20,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:37:20,565 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:37:20,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:37:20,586 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:37:20,587 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:37:20,587 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:37:20,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 22:37:20,587 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:37:20,588 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:37:20,588 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:37:20,588 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-08-31 22:37:20,764 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:37:20,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1049 places, 1112 transitions, 2341 flow [2023-08-31 22:37:21,502 INFO L130 PetriNetUnfolder]: 91/1263 cut-off events. [2023-08-31 22:37:21,502 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-31 22:37:21,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1336 conditions, 1263 events. 91/1263 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 7146 event pairs, 0 based on Foata normal form. 0/781 useless extension candidates. Maximal degree in co-relation 1170. Up to 20 conditions per place. [2023-08-31 22:37:21,564 INFO L82 GeneralOperation]: Start removeDead. Operand has 1049 places, 1112 transitions, 2341 flow [2023-08-31 22:37:21,577 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1049 places, 1112 transitions, 2341 flow [2023-08-31 22:37:21,577 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:37:21,578 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1049 places, 1112 transitions, 2341 flow [2023-08-31 22:37:21,579 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1049 places, 1112 transitions, 2341 flow [2023-08-31 22:37:21,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1049 places, 1112 transitions, 2341 flow [2023-08-31 22:37:22,118 INFO L130 PetriNetUnfolder]: 91/1263 cut-off events. [2023-08-31 22:37:22,119 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-31 22:37:22,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1336 conditions, 1263 events. 91/1263 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 7146 event pairs, 0 based on Foata normal form. 0/781 useless extension candidates. Maximal degree in co-relation 1170. Up to 20 conditions per place. [2023-08-31 22:37:22,319 INFO L119 LiptonReduction]: Number of co-enabled transitions 1049256 [2023-08-31 22:37:45,145 INFO L134 LiptonReduction]: Checked pairs total: 3805572 [2023-08-31 22:37:45,145 INFO L136 LiptonReduction]: Total number of compositions: 892 [2023-08-31 22:37:45,147 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:37:45,148 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;@4d44344f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:37:45,148 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:37:45,252 INFO L130 PetriNetUnfolder]: 50/591 cut-off events. [2023-08-31 22:37:45,252 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-31 22:37:45,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:37:45,253 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:37:45,253 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:37:45,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:37:45,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1294917962, now seen corresponding path program 1 times [2023-08-31 22:37:45,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:37:45,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073413139] [2023-08-31 22:37:45,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:37:45,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:37:45,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:37:45,282 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:37:45,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:37:45,305 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:37:45,306 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:37:45,306 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:37:45,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 22:37:45,306 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:37:45,307 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:37:45,307 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:37:45,307 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-08-31 22:37:45,499 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:37:45,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1161 places, 1231 transitions, 2602 flow [2023-08-31 22:37:46,120 INFO L130 PetriNetUnfolder]: 101/1399 cut-off events. [2023-08-31 22:37:46,120 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-31 22:37:46,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1485 conditions, 1399 events. 101/1399 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8067 event pairs, 0 based on Foata normal form. 0/864 useless extension candidates. Maximal degree in co-relation 1316. Up to 22 conditions per place. [2023-08-31 22:37:46,183 INFO L82 GeneralOperation]: Start removeDead. Operand has 1161 places, 1231 transitions, 2602 flow [2023-08-31 22:37:46,195 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1161 places, 1231 transitions, 2602 flow [2023-08-31 22:37:46,196 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:37:46,196 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1161 places, 1231 transitions, 2602 flow [2023-08-31 22:37:46,196 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1161 places, 1231 transitions, 2602 flow [2023-08-31 22:37:46,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1161 places, 1231 transitions, 2602 flow [2023-08-31 22:37:46,758 INFO L130 PetriNetUnfolder]: 101/1399 cut-off events. [2023-08-31 22:37:46,758 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-31 22:37:46,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1485 conditions, 1399 events. 101/1399 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8067 event pairs, 0 based on Foata normal form. 0/864 useless extension candidates. Maximal degree in co-relation 1316. Up to 22 conditions per place. [2023-08-31 22:37:46,960 INFO L119 LiptonReduction]: Number of co-enabled transitions 1306260 [2023-08-31 22:38:12,829 INFO L134 LiptonReduction]: Checked pairs total: 4772839 [2023-08-31 22:38:12,830 INFO L136 LiptonReduction]: Total number of compositions: 990 [2023-08-31 22:38:12,832 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:38:12,833 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;@4d44344f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:38:12,833 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:38:12,988 INFO L130 PetriNetUnfolder]: 57/669 cut-off events. [2023-08-31 22:38:12,988 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-31 22:38:12,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:38:12,988 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:38:12,988 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:38:12,988 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:38:12,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1525356355, now seen corresponding path program 1 times [2023-08-31 22:38:12,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:38:12,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97879218] [2023-08-31 22:38:12,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:38:12,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:38:13,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:38:13,015 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:38:13,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:38:13,041 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:38:13,041 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:38:13,042 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:38:13,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-31 22:38:13,042 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:38:13,043 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:38:13,043 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:38:13,043 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-08-31 22:38:13,294 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:38:13,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1273 places, 1350 transitions, 2865 flow [2023-08-31 22:38:13,897 INFO L130 PetriNetUnfolder]: 111/1535 cut-off events. [2023-08-31 22:38:13,897 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-08-31 22:38:14,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1635 conditions, 1535 events. 111/1535 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8995 event pairs, 0 based on Foata normal form. 0/947 useless extension candidates. Maximal degree in co-relation 1464. Up to 24 conditions per place. [2023-08-31 22:38:14,001 INFO L82 GeneralOperation]: Start removeDead. Operand has 1273 places, 1350 transitions, 2865 flow [2023-08-31 22:38:14,020 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1273 places, 1350 transitions, 2865 flow [2023-08-31 22:38:14,020 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:38:14,020 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1273 places, 1350 transitions, 2865 flow [2023-08-31 22:38:14,020 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1273 places, 1350 transitions, 2865 flow [2023-08-31 22:38:14,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1273 places, 1350 transitions, 2865 flow [2023-08-31 22:38:14,628 INFO L130 PetriNetUnfolder]: 111/1535 cut-off events. [2023-08-31 22:38:14,628 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-08-31 22:38:14,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1635 conditions, 1535 events. 111/1535 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8995 event pairs, 0 based on Foata normal form. 0/947 useless extension candidates. Maximal degree in co-relation 1464. Up to 24 conditions per place. [2023-08-31 22:38:14,954 INFO L119 LiptonReduction]: Number of co-enabled transitions 1591348 [2023-08-31 22:38:43,324 INFO L134 LiptonReduction]: Checked pairs total: 5931490 [2023-08-31 22:38:43,324 INFO L136 LiptonReduction]: Total number of compositions: 1098 [2023-08-31 22:38:43,326 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:38:43,326 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;@4d44344f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:38:43,327 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:38:43,464 INFO L130 PetriNetUnfolder]: 64/744 cut-off events. [2023-08-31 22:38:43,465 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-08-31 22:38:43,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:38:43,465 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:38:43,465 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:38:43,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:38:43,465 INFO L85 PathProgramCache]: Analyzing trace with hash -864123118, now seen corresponding path program 1 times [2023-08-31 22:38:43,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:38:43,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140216430] [2023-08-31 22:38:43,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:38:43,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:38:43,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:38:43,492 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:38:43,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:38:43,520 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:38:43,520 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:38:43,521 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:38:43,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-31 22:38:43,521 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:38:43,521 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:38:43,522 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:38:43,522 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-08-31 22:38:43,718 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:38:43,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1385 places, 1469 transitions, 3130 flow [2023-08-31 22:38:44,521 INFO L130 PetriNetUnfolder]: 121/1671 cut-off events. [2023-08-31 22:38:44,521 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-08-31 22:38:44,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1786 conditions, 1671 events. 121/1671 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 9926 event pairs, 0 based on Foata normal form. 0/1030 useless extension candidates. Maximal degree in co-relation 1614. Up to 26 conditions per place. [2023-08-31 22:38:44,600 INFO L82 GeneralOperation]: Start removeDead. Operand has 1385 places, 1469 transitions, 3130 flow [2023-08-31 22:38:44,614 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1385 places, 1469 transitions, 3130 flow [2023-08-31 22:38:44,614 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:38:44,615 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1385 places, 1469 transitions, 3130 flow [2023-08-31 22:38:44,615 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1385 places, 1469 transitions, 3130 flow [2023-08-31 22:38:44,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1385 places, 1469 transitions, 3130 flow [2023-08-31 22:38:45,367 INFO L130 PetriNetUnfolder]: 121/1671 cut-off events. [2023-08-31 22:38:45,367 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-08-31 22:38:45,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1786 conditions, 1671 events. 121/1671 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 9926 event pairs, 0 based on Foata normal form. 0/1030 useless extension candidates. Maximal degree in co-relation 1614. Up to 26 conditions per place. [2023-08-31 22:38:45,880 INFO L119 LiptonReduction]: Number of co-enabled transitions 1904520 [2023-08-31 22:39:16,639 INFO L134 LiptonReduction]: Checked pairs total: 6195274 [2023-08-31 22:39:16,639 INFO L136 LiptonReduction]: Total number of compositions: 1171 [2023-08-31 22:39:16,641 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:39:16,641 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;@4d44344f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:39:16,641 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:39:16,807 INFO L130 PetriNetUnfolder]: 70/821 cut-off events. [2023-08-31 22:39:16,808 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-08-31 22:39:16,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:39:16,808 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:39:16,808 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:39:16,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:39:16,809 INFO L85 PathProgramCache]: Analyzing trace with hash 715230075, now seen corresponding path program 1 times [2023-08-31 22:39:16,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:39:16,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919351952] [2023-08-31 22:39:16,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:39:16,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:39:16,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:39:16,839 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:39:16,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:39:16,871 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:39:16,871 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:39:16,871 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:39:16,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-31 22:39:16,872 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:39:16,872 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:39:16,872 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:39:16,873 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-08-31 22:39:17,076 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:39:17,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1497 places, 1588 transitions, 3397 flow [2023-08-31 22:39:18,089 INFO L130 PetriNetUnfolder]: 131/1807 cut-off events. [2023-08-31 22:39:18,090 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-08-31 22:39:18,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1938 conditions, 1807 events. 131/1807 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 10880 event pairs, 0 based on Foata normal form. 0/1113 useless extension candidates. Maximal degree in co-relation 1765. Up to 28 conditions per place. [2023-08-31 22:39:18,194 INFO L82 GeneralOperation]: Start removeDead. Operand has 1497 places, 1588 transitions, 3397 flow [2023-08-31 22:39:18,213 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1497 places, 1588 transitions, 3397 flow [2023-08-31 22:39:18,213 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:39:18,213 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1497 places, 1588 transitions, 3397 flow [2023-08-31 22:39:18,214 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1497 places, 1588 transitions, 3397 flow [2023-08-31 22:39:18,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1497 places, 1588 transitions, 3397 flow [2023-08-31 22:39:18,980 INFO L130 PetriNetUnfolder]: 131/1807 cut-off events. [2023-08-31 22:39:18,980 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-08-31 22:39:19,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1938 conditions, 1807 events. 131/1807 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 10880 event pairs, 0 based on Foata normal form. 0/1113 useless extension candidates. Maximal degree in co-relation 1765. Up to 28 conditions per place. [2023-08-31 22:39:19,717 INFO L119 LiptonReduction]: Number of co-enabled transitions 2245776 [2023-08-31 22:39:52,918 INFO L134 LiptonReduction]: Checked pairs total: 8237028 [2023-08-31 22:39:52,918 INFO L136 LiptonReduction]: Total number of compositions: 1257 [2023-08-31 22:39:52,920 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:39:52,920 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;@4d44344f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:39:52,921 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:39:53,112 INFO L130 PetriNetUnfolder]: 78/902 cut-off events. [2023-08-31 22:39:53,112 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-08-31 22:39:53,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:39:53,113 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:39:53,113 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:39:53,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:39:53,113 INFO L85 PathProgramCache]: Analyzing trace with hash 269357184, now seen corresponding path program 1 times [2023-08-31 22:39:53,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:39:53,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555851258] [2023-08-31 22:39:53,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:39:53,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:39:53,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:39:53,144 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:39:53,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:39:53,182 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:39:53,183 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:39:53,183 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:39:53,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-31 22:39:53,184 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:39:53,185 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:39:53,185 WARN L233 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:39:53,185 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2023-08-31 22:39:53,489 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:39:53,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1609 places, 1707 transitions, 3666 flow [2023-08-31 22:39:54,557 INFO L130 PetriNetUnfolder]: 141/1943 cut-off events. [2023-08-31 22:39:54,557 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-08-31 22:39:54,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2091 conditions, 1943 events. 141/1943 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 11799 event pairs, 0 based on Foata normal form. 0/1196 useless extension candidates. Maximal degree in co-relation 1917. Up to 30 conditions per place. [2023-08-31 22:39:54,726 INFO L82 GeneralOperation]: Start removeDead. Operand has 1609 places, 1707 transitions, 3666 flow [2023-08-31 22:39:54,755 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1609 places, 1707 transitions, 3666 flow [2023-08-31 22:39:54,755 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:39:54,755 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1609 places, 1707 transitions, 3666 flow [2023-08-31 22:39:54,756 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1609 places, 1707 transitions, 3666 flow [2023-08-31 22:39:54,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1609 places, 1707 transitions, 3666 flow [2023-08-31 22:39:55,737 INFO L130 PetriNetUnfolder]: 141/1943 cut-off events. [2023-08-31 22:39:55,737 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-08-31 22:39:55,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2091 conditions, 1943 events. 141/1943 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 11799 event pairs, 0 based on Foata normal form. 0/1196 useless extension candidates. Maximal degree in co-relation 1917. Up to 30 conditions per place. [2023-08-31 22:39:56,346 INFO L119 LiptonReduction]: Number of co-enabled transitions 2615116 [2023-08-31 22:40:33,241 INFO L134 LiptonReduction]: Checked pairs total: 9565905 [2023-08-31 22:40:33,241 INFO L136 LiptonReduction]: Total number of compositions: 1354 [2023-08-31 22:40:33,243 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:40:33,243 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;@4d44344f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:40:33,243 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:40:33,486 INFO L130 PetriNetUnfolder]: 84/976 cut-off events. [2023-08-31 22:40:33,486 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-08-31 22:40:33,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:40:33,486 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:40:33,487 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:40:33,487 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:40:33,487 INFO L85 PathProgramCache]: Analyzing trace with hash -576661935, now seen corresponding path program 1 times [2023-08-31 22:40:33,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:40:33,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726039977] [2023-08-31 22:40:33,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:40:33,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:40:33,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:40:33,517 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:40:33,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:40:33,551 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:40:33,551 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:40:33,551 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:40:33,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-31 22:40:33,552 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:40:33,552 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:40:33,552 WARN L233 ceAbstractionStarter]: 14 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:40:33,552 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 15 thread instances. [2023-08-31 22:40:33,880 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:40:33,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1721 places, 1826 transitions, 3937 flow [2023-08-31 22:40:35,257 INFO L130 PetriNetUnfolder]: 151/2079 cut-off events. [2023-08-31 22:40:35,258 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-08-31 22:40:35,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2245 conditions, 2079 events. 151/2079 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 12698 event pairs, 0 based on Foata normal form. 0/1279 useless extension candidates. Maximal degree in co-relation 2070. Up to 32 conditions per place. [2023-08-31 22:40:35,382 INFO L82 GeneralOperation]: Start removeDead. Operand has 1721 places, 1826 transitions, 3937 flow [2023-08-31 22:40:35,406 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1721 places, 1826 transitions, 3937 flow [2023-08-31 22:40:35,406 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:40:35,406 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1721 places, 1826 transitions, 3937 flow [2023-08-31 22:40:35,406 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1721 places, 1826 transitions, 3937 flow [2023-08-31 22:40:35,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1721 places, 1826 transitions, 3937 flow [2023-08-31 22:40:36,723 INFO L130 PetriNetUnfolder]: 151/2079 cut-off events. [2023-08-31 22:40:36,723 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-08-31 22:40:36,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2245 conditions, 2079 events. 151/2079 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 12698 event pairs, 0 based on Foata normal form. 0/1279 useless extension candidates. Maximal degree in co-relation 2070. Up to 32 conditions per place. [2023-08-31 22:40:37,453 INFO L119 LiptonReduction]: Number of co-enabled transitions 3012540 [2023-08-31 22:41:17,128 INFO L134 LiptonReduction]: Checked pairs total: 9837000 [2023-08-31 22:41:17,128 INFO L136 LiptonReduction]: Total number of compositions: 1500 [2023-08-31 22:41:17,130 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:41:17,131 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;@4d44344f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:41:17,131 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:41:17,469 INFO L130 PetriNetUnfolder]: 91/1054 cut-off events. [2023-08-31 22:41:17,470 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-08-31 22:41:17,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:41:17,470 INFO L208 CegarLoopForPetriNet]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:41:17,470 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:41:17,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:41:17,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1987508024, now seen corresponding path program 1 times [2023-08-31 22:41:17,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:41:17,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257996221] [2023-08-31 22:41:17,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:41:17,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:41:17,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:41:17,501 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:41:17,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:41:17,536 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:41:17,536 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:41:17,536 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:41:17,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-31 22:41:17,537 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:41:17,537 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:41:17,537 WARN L233 ceAbstractionStarter]: 15 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:41:17,537 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 16 thread instances. [2023-08-31 22:41:17,806 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:41:17,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1833 places, 1945 transitions, 4210 flow [2023-08-31 22:41:19,177 INFO L130 PetriNetUnfolder]: 161/2215 cut-off events. [2023-08-31 22:41:19,177 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-08-31 22:41:19,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2400 conditions, 2215 events. 161/2215 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 13703 event pairs, 0 based on Foata normal form. 0/1362 useless extension candidates. Maximal degree in co-relation 2224. Up to 34 conditions per place. [2023-08-31 22:41:19,365 INFO L82 GeneralOperation]: Start removeDead. Operand has 1833 places, 1945 transitions, 4210 flow [2023-08-31 22:41:19,398 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1833 places, 1945 transitions, 4210 flow [2023-08-31 22:41:19,398 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:41:19,398 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1833 places, 1945 transitions, 4210 flow [2023-08-31 22:41:19,399 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1833 places, 1945 transitions, 4210 flow [2023-08-31 22:41:19,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1833 places, 1945 transitions, 4210 flow [2023-08-31 22:41:20,897 INFO L130 PetriNetUnfolder]: 161/2215 cut-off events. [2023-08-31 22:41:20,897 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-08-31 22:41:21,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2400 conditions, 2215 events. 161/2215 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 13703 event pairs, 0 based on Foata normal form. 0/1362 useless extension candidates. Maximal degree in co-relation 2224. Up to 34 conditions per place. [2023-08-31 22:41:21,658 INFO L119 LiptonReduction]: Number of co-enabled transitions 3438048 [2023-08-31 22:42:04,419 INFO L134 LiptonReduction]: Checked pairs total: 12466357 [2023-08-31 22:42:04,419 INFO L136 LiptonReduction]: Total number of compositions: 1561 [2023-08-31 22:42:04,422 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:42:04,422 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;@4d44344f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:42:04,422 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:42:04,750 INFO L130 PetriNetUnfolder]: 98/1129 cut-off events. [2023-08-31 22:42:04,751 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-08-31 22:42:04,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:42:04,834 INFO L208 CegarLoopForPetriNet]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:42:04,834 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:42:04,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:42:04,835 INFO L85 PathProgramCache]: Analyzing trace with hash 983350106, now seen corresponding path program 1 times [2023-08-31 22:42:04,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:42:04,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507031273] [2023-08-31 22:42:04,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:42:04,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:42:04,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:42:04,881 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:42:04,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:42:04,919 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:42:04,919 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:42:04,919 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:42:04,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-31 22:42:04,919 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:42:04,920 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:42:04,920 WARN L233 ceAbstractionStarter]: 16 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:42:04,920 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 17 thread instances. [2023-08-31 22:42:05,171 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:42:05,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1945 places, 2064 transitions, 4485 flow [2023-08-31 22:42:06,814 INFO L130 PetriNetUnfolder]: 171/2351 cut-off events. [2023-08-31 22:42:06,814 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-08-31 22:42:06,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2556 conditions, 2351 events. 171/2351 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 14546 event pairs, 0 based on Foata normal form. 0/1445 useless extension candidates. Maximal degree in co-relation 2379. Up to 36 conditions per place. [2023-08-31 22:42:06,987 INFO L82 GeneralOperation]: Start removeDead. Operand has 1945 places, 2064 transitions, 4485 flow [2023-08-31 22:42:07,017 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1945 places, 2064 transitions, 4485 flow [2023-08-31 22:42:07,017 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:42:07,017 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1945 places, 2064 transitions, 4485 flow [2023-08-31 22:42:07,018 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1945 places, 2064 transitions, 4485 flow [2023-08-31 22:42:07,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1945 places, 2064 transitions, 4485 flow [2023-08-31 22:42:08,699 INFO L130 PetriNetUnfolder]: 171/2351 cut-off events. [2023-08-31 22:42:08,700 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-08-31 22:42:08,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2556 conditions, 2351 events. 171/2351 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 14546 event pairs, 0 based on Foata normal form. 0/1445 useless extension candidates. Maximal degree in co-relation 2379. Up to 36 conditions per place. [2023-08-31 22:42:09,649 INFO L119 LiptonReduction]: Number of co-enabled transitions 3891640 [2023-08-31 22:42:54,197 INFO L134 LiptonReduction]: Checked pairs total: 12664229 [2023-08-31 22:42:54,197 INFO L136 LiptonReduction]: Total number of compositions: 1624 [2023-08-31 22:42:54,199 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:42:54,199 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;@4d44344f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:42:54,200 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:42:54,588 INFO L130 PetriNetUnfolder]: 106/1209 cut-off events. [2023-08-31 22:42:54,588 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-08-31 22:42:54,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:42:54,588 INFO L208 CegarLoopForPetriNet]: trace histogram [18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:42:54,588 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:42:54,588 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:42:54,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1990890871, now seen corresponding path program 1 times [2023-08-31 22:42:54,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:42:54,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864555649] [2023-08-31 22:42:54,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:42:54,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:42:54,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:42:54,624 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:42:54,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:42:54,663 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:42:54,663 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:42:54,663 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:42:54,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-31 22:42:54,663 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:42:54,664 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:42:54,664 WARN L233 ceAbstractionStarter]: 17 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:42:54,664 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 18 thread instances. [2023-08-31 22:42:54,990 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:42:54,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2057 places, 2183 transitions, 4762 flow [2023-08-31 22:42:57,039 INFO L130 PetriNetUnfolder]: 181/2487 cut-off events. [2023-08-31 22:42:57,039 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-08-31 22:42:57,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2713 conditions, 2487 events. 181/2487 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 15515 event pairs, 0 based on Foata normal form. 0/1528 useless extension candidates. Maximal degree in co-relation 2535. Up to 38 conditions per place. [2023-08-31 22:42:57,226 INFO L82 GeneralOperation]: Start removeDead. Operand has 2057 places, 2183 transitions, 4762 flow [2023-08-31 22:42:57,260 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2057 places, 2183 transitions, 4762 flow [2023-08-31 22:42:57,260 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:42:57,260 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2057 places, 2183 transitions, 4762 flow [2023-08-31 22:42:57,260 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2057 places, 2183 transitions, 4762 flow [2023-08-31 22:42:57,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2057 places, 2183 transitions, 4762 flow [2023-08-31 22:42:59,047 INFO L130 PetriNetUnfolder]: 181/2487 cut-off events. [2023-08-31 22:42:59,047 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-08-31 22:42:59,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2713 conditions, 2487 events. 181/2487 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 15515 event pairs, 0 based on Foata normal form. 0/1528 useless extension candidates. Maximal degree in co-relation 2535. Up to 38 conditions per place. [2023-08-31 22:43:00,215 INFO L119 LiptonReduction]: Number of co-enabled transitions 4373316 [2023-08-31 22:43:49,600 INFO L134 LiptonReduction]: Checked pairs total: 15781083 [2023-08-31 22:43:49,600 INFO L136 LiptonReduction]: Total number of compositions: 1756 [2023-08-31 22:43:49,602 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:43:49,602 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;@4d44344f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:43:49,602 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:43:50,154 INFO L130 PetriNetUnfolder]: 113/1285 cut-off events. [2023-08-31 22:43:50,154 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-08-31 22:43:50,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:43:50,154 INFO L208 CegarLoopForPetriNet]: trace histogram [19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:43:50,154 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:43:50,155 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:43:50,155 INFO L85 PathProgramCache]: Analyzing trace with hash -528127944, now seen corresponding path program 1 times [2023-08-31 22:43:50,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:43:50,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461093481] [2023-08-31 22:43:50,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:43:50,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:43:50,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:43:50,205 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:43:50,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:43:50,248 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:43:50,250 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:43:50,250 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:43:50,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-31 22:43:50,250 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:43:50,251 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:43:50,252 WARN L233 ceAbstractionStarter]: 18 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:43:50,252 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 19 thread instances. [2023-08-31 22:43:50,543 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:43:50,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2169 places, 2302 transitions, 5041 flow [2023-08-31 22:43:52,682 INFO L130 PetriNetUnfolder]: 191/2623 cut-off events. [2023-08-31 22:43:52,682 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-08-31 22:43:52,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2871 conditions, 2623 events. 191/2623 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 16501 event pairs, 0 based on Foata normal form. 0/1611 useless extension candidates. Maximal degree in co-relation 2692. Up to 40 conditions per place. [2023-08-31 22:43:52,889 INFO L82 GeneralOperation]: Start removeDead. Operand has 2169 places, 2302 transitions, 5041 flow [2023-08-31 22:43:52,924 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2169 places, 2302 transitions, 5041 flow [2023-08-31 22:43:52,924 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:43:52,924 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2169 places, 2302 transitions, 5041 flow [2023-08-31 22:43:52,924 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2169 places, 2302 transitions, 5041 flow [2023-08-31 22:43:52,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2169 places, 2302 transitions, 5041 flow [2023-08-31 22:43:55,031 INFO L130 PetriNetUnfolder]: 191/2623 cut-off events. [2023-08-31 22:43:55,031 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-08-31 22:43:55,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2871 conditions, 2623 events. 191/2623 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 16501 event pairs, 0 based on Foata normal form. 0/1611 useless extension candidates. Maximal degree in co-relation 2692. Up to 40 conditions per place. [2023-08-31 22:43:55,885 INFO L119 LiptonReduction]: Number of co-enabled transitions 4883076 [2023-08-31 22:44:49,832 INFO L134 LiptonReduction]: Checked pairs total: 15716525 [2023-08-31 22:44:49,832 INFO L136 LiptonReduction]: Total number of compositions: 1855 [2023-08-31 22:44:49,834 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:44:49,834 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;@4d44344f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:44:49,834 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:44:50,393 INFO L130 PetriNetUnfolder]: 120/1363 cut-off events. [2023-08-31 22:44:50,393 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-08-31 22:44:50,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:44:50,393 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:44:50,393 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:44:50,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:44:50,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1617347922, now seen corresponding path program 1 times [2023-08-31 22:44:50,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:44:50,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999036490] [2023-08-31 22:44:50,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:44:50,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:44:50,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:44:50,436 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:44:50,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:44:50,480 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:44:50,481 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:44:50,481 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:44:50,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-31 22:44:50,481 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:44:50,482 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:44:50,482 WARN L233 ceAbstractionStarter]: 19 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:44:50,482 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 20 thread instances. [2023-08-31 22:44:50,828 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:44:50,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2281 places, 2421 transitions, 5322 flow [2023-08-31 22:44:53,113 INFO L130 PetriNetUnfolder]: 201/2759 cut-off events. [2023-08-31 22:44:53,114 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-08-31 22:44:53,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3030 conditions, 2759 events. 201/2759 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 17404 event pairs, 0 based on Foata normal form. 0/1694 useless extension candidates. Maximal degree in co-relation 2850. Up to 42 conditions per place. [2023-08-31 22:44:53,366 INFO L82 GeneralOperation]: Start removeDead. Operand has 2281 places, 2421 transitions, 5322 flow [2023-08-31 22:44:53,407 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2281 places, 2421 transitions, 5322 flow [2023-08-31 22:44:53,408 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:44:53,408 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2281 places, 2421 transitions, 5322 flow [2023-08-31 22:44:53,408 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2281 places, 2421 transitions, 5322 flow [2023-08-31 22:44:53,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2281 places, 2421 transitions, 5322 flow [2023-08-31 22:44:55,637 INFO L130 PetriNetUnfolder]: 201/2759 cut-off events. [2023-08-31 22:44:55,637 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-08-31 22:44:55,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3030 conditions, 2759 events. 201/2759 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 17404 event pairs, 0 based on Foata normal form. 0/1694 useless extension candidates. Maximal degree in co-relation 2850. Up to 42 conditions per place. [2023-08-31 22:44:56,763 INFO L119 LiptonReduction]: Number of co-enabled transitions 5420920 [2023-08-31 22:45:53,105 INFO L134 LiptonReduction]: Checked pairs total: 19338241 [2023-08-31 22:45:53,106 INFO L136 LiptonReduction]: Total number of compositions: 1925 [2023-08-31 22:45:53,107 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:45:53,108 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;@4d44344f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:45:53,108 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:45:53,698 INFO L130 PetriNetUnfolder]: 126/1437 cut-off events. [2023-08-31 22:45:53,698 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-08-31 22:45:53,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:45:53,698 INFO L208 CegarLoopForPetriNet]: trace histogram [21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:45:53,698 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:45:53,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:45:53,698 INFO L85 PathProgramCache]: Analyzing trace with hash -334844340, now seen corresponding path program 1 times [2023-08-31 22:45:53,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:45:53,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931508030] [2023-08-31 22:45:53,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:45:53,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:45:53,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:45:53,737 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:45:53,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:45:53,785 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:45:53,785 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:45:53,785 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:45:53,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-31 22:45:53,785 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:45:53,786 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:45:53,786 WARN L233 ceAbstractionStarter]: 20 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:45:53,786 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 21 thread instances. [2023-08-31 22:45:54,204 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:45:54,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2393 places, 2540 transitions, 5605 flow [2023-08-31 22:45:56,876 INFO L130 PetriNetUnfolder]: 211/2895 cut-off events. [2023-08-31 22:45:56,876 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-08-31 22:45:57,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3190 conditions, 2895 events. 211/2895 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 18339 event pairs, 0 based on Foata normal form. 0/1777 useless extension candidates. Maximal degree in co-relation 3009. Up to 44 conditions per place. [2023-08-31 22:45:57,146 INFO L82 GeneralOperation]: Start removeDead. Operand has 2393 places, 2540 transitions, 5605 flow [2023-08-31 22:45:57,189 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2393 places, 2540 transitions, 5605 flow [2023-08-31 22:45:57,189 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:45:57,189 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2393 places, 2540 transitions, 5605 flow [2023-08-31 22:45:57,189 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2393 places, 2540 transitions, 5605 flow [2023-08-31 22:45:57,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2393 places, 2540 transitions, 5605 flow [2023-08-31 22:45:59,760 INFO L130 PetriNetUnfolder]: 211/2895 cut-off events. [2023-08-31 22:45:59,760 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-08-31 22:46:00,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3190 conditions, 2895 events. 211/2895 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 18339 event pairs, 0 based on Foata normal form. 0/1777 useless extension candidates. Maximal degree in co-relation 3009. Up to 44 conditions per place. [2023-08-31 22:46:00,987 INFO L119 LiptonReduction]: Number of co-enabled transitions 5986848 Killed by 15