./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-data-race.prp --file ../../../trunk/examples/svcomp/pthread-ext/41_FreeBSD_abd_kbd_sliced.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for data races 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/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread-ext/41_FreeBSD_abd_kbd_sliced.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DataRace-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 ! data-race) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a7b1b4de6077c19ce6e7b3206b7aec935b2c49ded10f81f01daddf9a689038c1 --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 12:00:15,569 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 12:00:15,571 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 12:00:15,615 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 12:00:15,617 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 12:00:15,620 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 12:00:15,622 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 12:00:15,624 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 12:00:15,626 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 12:00:15,630 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 12:00:15,631 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 12:00:15,633 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 12:00:15,633 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 12:00:15,637 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 12:00:15,638 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 12:00:15,641 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 12:00:15,642 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 12:00:15,643 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 12:00:15,645 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 12:00:15,649 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 12:00:15,651 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 12:00:15,652 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 12:00:15,652 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 12:00:15,653 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 12:00:15,660 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 12:00:15,660 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 12:00:15,661 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 12:00:15,662 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 12:00:15,663 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 12:00:15,664 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 12:00:15,664 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 12:00:15,669 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 12:00:15,671 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 12:00:15,672 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 12:00:15,673 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 12:00:15,673 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 12:00:15,674 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 12:00:15,674 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 12:00:15,674 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 12:00:15,675 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 12:00:15,675 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 12:00:15,677 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DataRace-32bit-Automizer_Default.epf [2023-08-31 12:00:15,717 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 12:00:15,717 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 12:00:15,718 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 12:00:15,718 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 12:00:15,719 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 12:00:15,719 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 12:00:15,720 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 12:00:15,720 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 12:00:15,720 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 12:00:15,720 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 12:00:15,721 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 12:00:15,721 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-31 12:00:15,721 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 12:00:15,722 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 12:00:15,722 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 12:00:15,722 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 12:00:15,722 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 12:00:15,722 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 12:00:15,722 INFO L138 SettingsManager]: * Check absence of data races in concurrent programs=true [2023-08-31 12:00:15,723 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 12:00:15,723 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 12:00:15,723 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 12:00:15,723 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 12:00:15,723 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 12:00:15,724 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 12:00:15,724 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 12:00:15,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 12:00:15,724 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 12:00:15,724 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 12:00:15,724 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 12:00:15,725 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 12:00:15,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 12:00:15,725 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 12:00:15,725 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 12:00:15,725 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 12:00:15,726 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 12:00:15,726 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 12:00:15,726 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a7b1b4de6077c19ce6e7b3206b7aec935b2c49ded10f81f01daddf9a689038c1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-08-31 12:00:16,020 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 12:00:16,040 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 12:00:16,043 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 12:00:16,044 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 12:00:16,045 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 12:00:16,047 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/41_FreeBSD_abd_kbd_sliced.i [2023-08-31 12:00:17,307 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 12:00:17,621 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 12:00:17,621 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/41_FreeBSD_abd_kbd_sliced.i [2023-08-31 12:00:17,633 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0215b2d5b/b900db2af32047c29d5c8bdcd0ae332b/FLAGcd68c8df2 [2023-08-31 12:00:17,648 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0215b2d5b/b900db2af32047c29d5c8bdcd0ae332b [2023-08-31 12:00:17,651 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 12:00:17,653 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 12:00:17,655 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 12:00:17,656 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 12:00:17,658 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 12:00:17,659 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 12:00:17" (1/1) ... [2023-08-31 12:00:17,660 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@334e4e2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:00:17, skipping insertion in model container [2023-08-31 12:00:17,660 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 12:00:17" (1/1) ... [2023-08-31 12:00:17,666 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 12:00:17,708 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 12:00:18,034 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/41_FreeBSD_abd_kbd_sliced.i[30307,30320] [2023-08-31 12:00:18,038 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/41_FreeBSD_abd_kbd_sliced.i[30489,30502] [2023-08-31 12:00:18,040 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/41_FreeBSD_abd_kbd_sliced.i[30660,30673] [2023-08-31 12:00:18,051 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/41_FreeBSD_abd_kbd_sliced.i[31038,31051] [2023-08-31 12:00:18,057 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/41_FreeBSD_abd_kbd_sliced.i[31460,31473] [2023-08-31 12:00:18,064 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 12:00:18,073 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 12:00:18,132 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/41_FreeBSD_abd_kbd_sliced.i[30307,30320] [2023-08-31 12:00:18,133 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/41_FreeBSD_abd_kbd_sliced.i[30489,30502] [2023-08-31 12:00:18,134 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/41_FreeBSD_abd_kbd_sliced.i[30660,30673] [2023-08-31 12:00:18,136 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/41_FreeBSD_abd_kbd_sliced.i[31038,31051] [2023-08-31 12:00:18,175 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/41_FreeBSD_abd_kbd_sliced.i[31460,31473] [2023-08-31 12:00:18,178 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 12:00:18,218 INFO L208 MainTranslator]: Completed translation [2023-08-31 12:00:18,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:00:18 WrapperNode [2023-08-31 12:00:18,218 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 12:00:18,220 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 12:00:18,220 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 12:00:18,221 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 12:00:18,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:00:18" (1/1) ... [2023-08-31 12:00:18,251 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:00:18" (1/1) ... [2023-08-31 12:00:18,294 INFO L138 Inliner]: procedures = 174, calls = 30, calls flagged for inlining = 22, calls inlined = 33, statements flattened = 305 [2023-08-31 12:00:18,295 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 12:00:18,296 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 12:00:18,296 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 12:00:18,296 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 12:00:18,304 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:00:18" (1/1) ... [2023-08-31 12:00:18,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:00:18" (1/1) ... [2023-08-31 12:00:18,310 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:00:18" (1/1) ... [2023-08-31 12:00:18,311 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:00:18" (1/1) ... [2023-08-31 12:00:18,317 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:00:18" (1/1) ... [2023-08-31 12:00:18,338 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:00:18" (1/1) ... [2023-08-31 12:00:18,341 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:00:18" (1/1) ... [2023-08-31 12:00:18,342 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:00:18" (1/1) ... [2023-08-31 12:00:18,345 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 12:00:18,346 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 12:00:18,347 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 12:00:18,347 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 12:00:18,347 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:00:18" (1/1) ... [2023-08-31 12:00:18,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 12:00:18,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 12:00:18,398 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 12:00:18,421 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 12:00:18,433 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-31 12:00:18,434 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-31 12:00:18,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 12:00:18,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 12:00:18,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 12:00:18,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 12:00:18,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 12:00:18,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 12:00:18,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 12:00:18,436 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 12:00:18,564 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 12:00:18,565 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 12:00:19,043 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 12:00:19,254 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 12:00:19,255 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-31 12:00:19,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 12:00:19 BoogieIcfgContainer [2023-08-31 12:00:19,257 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 12:00:19,260 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 12:00:19,260 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 12:00:19,263 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 12:00:19,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 12:00:17" (1/3) ... [2023-08-31 12:00:19,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ce476ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 12:00:19, skipping insertion in model container [2023-08-31 12:00:19,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:00:18" (2/3) ... [2023-08-31 12:00:19,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ce476ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 12:00:19, skipping insertion in model container [2023-08-31 12:00:19,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 12:00:19" (3/3) ... [2023-08-31 12:00:19,265 INFO L112 eAbstractionObserver]: Analyzing ICFG 41_FreeBSD_abd_kbd_sliced.i [2023-08-31 12:00:19,272 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 12:00:19,281 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 12:00:19,282 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 40 error locations. [2023-08-31 12:00:19,282 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 12:00:19,361 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:00:19,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 196 transitions, 397 flow [2023-08-31 12:00:19,482 INFO L130 PetriNetUnfolder]: 20/206 cut-off events. [2023-08-31 12:00:19,483 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 12:00:19,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 206 events. 20/206 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 616 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 181. Up to 7 conditions per place. [2023-08-31 12:00:19,490 INFO L82 GeneralOperation]: Start removeDead. Operand has 180 places, 196 transitions, 397 flow [2023-08-31 12:00:19,500 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 180 places, 196 transitions, 397 flow [2023-08-31 12:00:19,503 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:00:19,516 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 180 places, 196 transitions, 397 flow [2023-08-31 12:00:19,520 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 180 places, 196 transitions, 397 flow [2023-08-31 12:00:19,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 196 transitions, 397 flow [2023-08-31 12:00:19,559 INFO L130 PetriNetUnfolder]: 20/206 cut-off events. [2023-08-31 12:00:19,560 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 12:00:19,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 206 events. 20/206 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 616 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 181. Up to 7 conditions per place. [2023-08-31 12:00:19,566 INFO L119 LiptonReduction]: Number of co-enabled transitions 4394 [2023-08-31 12:00:25,754 INFO L134 LiptonReduction]: Checked pairs total: 4827 [2023-08-31 12:00:25,757 INFO L136 LiptonReduction]: Total number of compositions: 284 [2023-08-31 12:00:25,777 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:00:25,783 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1f3896ce, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:00:25,783 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:00:25,794 INFO L130 PetriNetUnfolder]: 5/56 cut-off events. [2023-08-31 12:00:25,794 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 12:00:25,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:00:25,795 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-31 12:00:25,796 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:00:25,800 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:00:25,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1500912448, now seen corresponding path program 1 times [2023-08-31 12:00:25,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:00:25,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492502232] [2023-08-31 12:00:25,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:00:25,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:00:25,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:00:25,916 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:00:25,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:00:25,966 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:00:25,967 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:00:25,968 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:00:25,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 12:00:25,970 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:00:25,973 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:00:25,974 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:00:25,974 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-31 12:00:26,024 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:00:26,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 334 places, 366 transitions, 744 flow [2023-08-31 12:00:26,142 INFO L130 PetriNetUnfolder]: 39/388 cut-off events. [2023-08-31 12:00:26,142 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 12:00:26,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 398 conditions, 388 events. 39/388 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1766 event pairs, 0 based on Foata normal form. 0/266 useless extension candidates. Maximal degree in co-relation 350. Up to 7 conditions per place. [2023-08-31 12:00:26,147 INFO L82 GeneralOperation]: Start removeDead. Operand has 334 places, 366 transitions, 744 flow [2023-08-31 12:00:26,151 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 334 places, 366 transitions, 744 flow [2023-08-31 12:00:26,151 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:00:26,151 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 334 places, 366 transitions, 744 flow [2023-08-31 12:00:26,152 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 334 places, 366 transitions, 744 flow [2023-08-31 12:00:26,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 334 places, 366 transitions, 744 flow [2023-08-31 12:00:26,215 INFO L130 PetriNetUnfolder]: 39/388 cut-off events. [2023-08-31 12:00:26,215 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 12:00:26,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 398 conditions, 388 events. 39/388 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1766 event pairs, 0 based on Foata normal form. 0/266 useless extension candidates. Maximal degree in co-relation 350. Up to 7 conditions per place. [2023-08-31 12:00:26,260 INFO L119 LiptonReduction]: Number of co-enabled transitions 66248 [2023-08-31 12:00:31,641 INFO L134 LiptonReduction]: Checked pairs total: 304745 [2023-08-31 12:00:31,642 INFO L136 LiptonReduction]: Total number of compositions: 285 [2023-08-31 12:00:31,644 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:00:31,645 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1f3896ce, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:00:31,645 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:00:31,657 INFO L130 PetriNetUnfolder]: 12/127 cut-off events. [2023-08-31 12:00:31,657 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 12:00:31,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:00:31,657 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-31 12:00:31,658 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:00:31,658 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:00:31,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1796691275, now seen corresponding path program 1 times [2023-08-31 12:00:31,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:00:31,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115885952] [2023-08-31 12:00:31,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:00:31,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:00:31,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:00:31,677 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:00:31,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:00:31,692 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:00:31,693 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:00:31,693 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:00:31,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 12:00:31,693 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:00:31,694 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:00:31,694 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:00:31,695 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-31 12:00:31,734 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:00:31,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 488 places, 536 transitions, 1093 flow [2023-08-31 12:00:31,857 INFO L130 PetriNetUnfolder]: 58/570 cut-off events. [2023-08-31 12:00:31,858 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 12:00:31,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 586 conditions, 570 events. 58/570 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 3065 event pairs, 0 based on Foata normal form. 0/388 useless extension candidates. Maximal degree in co-relation 519. Up to 8 conditions per place. [2023-08-31 12:00:31,874 INFO L82 GeneralOperation]: Start removeDead. Operand has 488 places, 536 transitions, 1093 flow [2023-08-31 12:00:31,881 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 488 places, 536 transitions, 1093 flow [2023-08-31 12:00:31,882 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:00:31,882 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 488 places, 536 transitions, 1093 flow [2023-08-31 12:00:31,882 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 488 places, 536 transitions, 1093 flow [2023-08-31 12:00:31,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 488 places, 536 transitions, 1093 flow [2023-08-31 12:00:32,006 INFO L130 PetriNetUnfolder]: 58/570 cut-off events. [2023-08-31 12:00:32,008 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 12:00:32,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 586 conditions, 570 events. 58/570 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 3065 event pairs, 0 based on Foata normal form. 0/388 useless extension candidates. Maximal degree in co-relation 519. Up to 8 conditions per place. [2023-08-31 12:00:32,084 INFO L119 LiptonReduction]: Number of co-enabled transitions 185562 [2023-08-31 12:00:39,348 INFO L134 LiptonReduction]: Checked pairs total: 905254 [2023-08-31 12:00:39,348 INFO L136 LiptonReduction]: Total number of compositions: 405 [2023-08-31 12:00:39,350 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:00:39,351 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1f3896ce, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:00:39,351 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:00:39,372 INFO L130 PetriNetUnfolder]: 21/215 cut-off events. [2023-08-31 12:00:39,373 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 12:00:39,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:00:39,373 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-31 12:00:39,373 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:00:39,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:00:39,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1625531609, now seen corresponding path program 1 times [2023-08-31 12:00:39,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:00:39,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526836156] [2023-08-31 12:00:39,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:00:39,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:00:39,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:00:39,393 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:00:39,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:00:39,408 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:00:39,408 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:00:39,408 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:00:39,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 12:00:39,408 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:00:39,409 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:00:39,409 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:00:39,409 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-31 12:00:39,461 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:00:39,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 642 places, 706 transitions, 1444 flow [2023-08-31 12:00:39,690 INFO L130 PetriNetUnfolder]: 77/752 cut-off events. [2023-08-31 12:00:39,690 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-31 12:00:39,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 775 conditions, 752 events. 77/752 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 4401 event pairs, 0 based on Foata normal form. 0/510 useless extension candidates. Maximal degree in co-relation 688. Up to 10 conditions per place. [2023-08-31 12:00:39,710 INFO L82 GeneralOperation]: Start removeDead. Operand has 642 places, 706 transitions, 1444 flow [2023-08-31 12:00:39,718 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 642 places, 706 transitions, 1444 flow [2023-08-31 12:00:39,718 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:00:39,718 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 642 places, 706 transitions, 1444 flow [2023-08-31 12:00:39,719 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 642 places, 706 transitions, 1444 flow [2023-08-31 12:00:39,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 642 places, 706 transitions, 1444 flow [2023-08-31 12:00:39,909 INFO L130 PetriNetUnfolder]: 77/752 cut-off events. [2023-08-31 12:00:39,910 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-31 12:00:39,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 775 conditions, 752 events. 77/752 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 4401 event pairs, 0 based on Foata normal form. 0/510 useless extension candidates. Maximal degree in co-relation 688. Up to 10 conditions per place. [2023-08-31 12:00:40,038 INFO L119 LiptonReduction]: Number of co-enabled transitions 362336 [2023-08-31 12:00:49,009 INFO L134 LiptonReduction]: Checked pairs total: 1772963 [2023-08-31 12:00:49,010 INFO L136 LiptonReduction]: Total number of compositions: 539 [2023-08-31 12:00:49,012 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:00:49,013 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1f3896ce, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:00:49,013 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:00:49,050 INFO L130 PetriNetUnfolder]: 35/350 cut-off events. [2023-08-31 12:00:49,051 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-31 12:00:49,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:00:49,051 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-31 12:00:49,051 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:00:49,051 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:00:49,052 INFO L85 PathProgramCache]: Analyzing trace with hash -614265347, now seen corresponding path program 1 times [2023-08-31 12:00:49,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:00:49,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405284294] [2023-08-31 12:00:49,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:00:49,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:00:49,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:00:49,070 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:00:49,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:00:49,088 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:00:49,089 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:00:49,089 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:00:49,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 12:00:49,089 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:00:49,099 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:00:49,099 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:00:49,099 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-31 12:00:49,190 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:00:49,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 796 places, 876 transitions, 1797 flow [2023-08-31 12:00:49,555 INFO L130 PetriNetUnfolder]: 96/934 cut-off events. [2023-08-31 12:00:49,556 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-31 12:00:49,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 965 conditions, 934 events. 96/934 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5733 event pairs, 0 based on Foata normal form. 0/632 useless extension candidates. Maximal degree in co-relation 857. Up to 12 conditions per place. [2023-08-31 12:00:49,596 INFO L82 GeneralOperation]: Start removeDead. Operand has 796 places, 876 transitions, 1797 flow [2023-08-31 12:00:49,607 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 796 places, 876 transitions, 1797 flow [2023-08-31 12:00:49,607 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:00:49,607 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 796 places, 876 transitions, 1797 flow [2023-08-31 12:00:49,608 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 796 places, 876 transitions, 1797 flow [2023-08-31 12:00:49,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 796 places, 876 transitions, 1797 flow [2023-08-31 12:00:49,900 INFO L130 PetriNetUnfolder]: 96/934 cut-off events. [2023-08-31 12:00:49,900 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-31 12:00:49,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 965 conditions, 934 events. 96/934 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5733 event pairs, 0 based on Foata normal form. 0/632 useless extension candidates. Maximal degree in co-relation 857. Up to 12 conditions per place. [2023-08-31 12:00:50,016 INFO L119 LiptonReduction]: Number of co-enabled transitions 596570 [2023-08-31 12:01:01,683 INFO L134 LiptonReduction]: Checked pairs total: 2927020 [2023-08-31 12:01:01,683 INFO L136 LiptonReduction]: Total number of compositions: 673 [2023-08-31 12:01:01,686 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:01:01,686 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1f3896ce, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:01:01,687 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:01:01,755 INFO L130 PetriNetUnfolder]: 53/455 cut-off events. [2023-08-31 12:01:01,755 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-31 12:01:01,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:01:01,755 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:01:01,756 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:01:01,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:01:01,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1985275700, now seen corresponding path program 1 times [2023-08-31 12:01:01,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:01:01,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366628909] [2023-08-31 12:01:01,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:01:01,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:01:01,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:01:01,775 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:01:01,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:01:01,794 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:01:01,794 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:01:01,795 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:01:01,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 12:01:01,795 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:01:01,796 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:01:01,796 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:01:01,796 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-31 12:01:01,856 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:01:01,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 950 places, 1046 transitions, 2152 flow [2023-08-31 12:01:02,258 INFO L130 PetriNetUnfolder]: 115/1116 cut-off events. [2023-08-31 12:01:02,259 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-31 12:01:02,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1156 conditions, 1116 events. 115/1116 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 7073 event pairs, 0 based on Foata normal form. 0/754 useless extension candidates. Maximal degree in co-relation 1026. Up to 14 conditions per place. [2023-08-31 12:01:02,316 INFO L82 GeneralOperation]: Start removeDead. Operand has 950 places, 1046 transitions, 2152 flow [2023-08-31 12:01:02,337 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 950 places, 1046 transitions, 2152 flow [2023-08-31 12:01:02,337 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:01:02,337 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 950 places, 1046 transitions, 2152 flow [2023-08-31 12:01:02,338 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 950 places, 1046 transitions, 2152 flow [2023-08-31 12:01:02,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 950 places, 1046 transitions, 2152 flow [2023-08-31 12:01:02,772 INFO L130 PetriNetUnfolder]: 115/1116 cut-off events. [2023-08-31 12:01:02,772 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-31 12:01:02,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1156 conditions, 1116 events. 115/1116 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 7073 event pairs, 0 based on Foata normal form. 0/754 useless extension candidates. Maximal degree in co-relation 1026. Up to 14 conditions per place. [2023-08-31 12:01:02,934 INFO L119 LiptonReduction]: Number of co-enabled transitions 888264 [2023-08-31 12:01:16,480 INFO L134 LiptonReduction]: Checked pairs total: 4423726 [2023-08-31 12:01:16,480 INFO L136 LiptonReduction]: Total number of compositions: 780 [2023-08-31 12:01:16,483 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:01:16,484 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1f3896ce, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:01:16,484 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:01:16,586 INFO L130 PetriNetUnfolder]: 62/550 cut-off events. [2023-08-31 12:01:16,587 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-31 12:01:16,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:01:16,587 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:01:16,593 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:01:16,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:01:16,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1166171811, now seen corresponding path program 1 times [2023-08-31 12:01:16,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:01:16,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637849765] [2023-08-31 12:01:16,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:01:16,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:01:16,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:01:16,640 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:01:16,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:01:16,666 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:01:16,671 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:01:16,672 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:01:16,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 12:01:16,672 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:01:16,679 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:01:16,680 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:01:16,680 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-31 12:01:16,749 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:01:16,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1104 places, 1216 transitions, 2509 flow [2023-08-31 12:01:17,296 INFO L130 PetriNetUnfolder]: 134/1298 cut-off events. [2023-08-31 12:01:17,296 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-31 12:01:17,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1348 conditions, 1298 events. 134/1298 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 8392 event pairs, 0 based on Foata normal form. 0/876 useless extension candidates. Maximal degree in co-relation 1195. Up to 16 conditions per place. [2023-08-31 12:01:17,375 INFO L82 GeneralOperation]: Start removeDead. Operand has 1104 places, 1216 transitions, 2509 flow [2023-08-31 12:01:17,402 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1104 places, 1216 transitions, 2509 flow [2023-08-31 12:01:17,402 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:01:17,402 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1104 places, 1216 transitions, 2509 flow [2023-08-31 12:01:17,402 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1104 places, 1216 transitions, 2509 flow [2023-08-31 12:01:17,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1104 places, 1216 transitions, 2509 flow [2023-08-31 12:01:17,994 INFO L130 PetriNetUnfolder]: 134/1298 cut-off events. [2023-08-31 12:01:17,995 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-31 12:01:18,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1348 conditions, 1298 events. 134/1298 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 8392 event pairs, 0 based on Foata normal form. 0/876 useless extension candidates. Maximal degree in co-relation 1195. Up to 16 conditions per place. [2023-08-31 12:01:18,239 INFO L119 LiptonReduction]: Number of co-enabled transitions 1237418 [2023-08-31 12:01:33,785 INFO L134 LiptonReduction]: Checked pairs total: 6089215 [2023-08-31 12:01:33,785 INFO L136 LiptonReduction]: Total number of compositions: 916 [2023-08-31 12:01:33,787 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:01:33,788 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1f3896ce, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:01:33,788 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:01:33,972 INFO L130 PetriNetUnfolder]: 78/660 cut-off events. [2023-08-31 12:01:33,972 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-31 12:01:33,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:01:33,972 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:01:33,973 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:01:33,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:01:33,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1325216925, now seen corresponding path program 1 times [2023-08-31 12:01:33,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:01:33,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101037087] [2023-08-31 12:01:33,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:01:33,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:01:34,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:01:34,020 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:01:34,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:01:34,052 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:01:34,055 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:01:34,055 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:01:34,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 12:01:34,055 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:01:34,056 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:01:34,056 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:01:34,056 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-08-31 12:01:34,155 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:01:34,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1258 places, 1386 transitions, 2868 flow [2023-08-31 12:01:34,827 INFO L130 PetriNetUnfolder]: 153/1480 cut-off events. [2023-08-31 12:01:34,828 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-31 12:01:34,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1541 conditions, 1480 events. 153/1480 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 9773 event pairs, 0 based on Foata normal form. 0/998 useless extension candidates. Maximal degree in co-relation 1364. Up to 18 conditions per place. [2023-08-31 12:01:34,936 INFO L82 GeneralOperation]: Start removeDead. Operand has 1258 places, 1386 transitions, 2868 flow [2023-08-31 12:01:34,962 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1258 places, 1386 transitions, 2868 flow [2023-08-31 12:01:34,963 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:01:34,963 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1258 places, 1386 transitions, 2868 flow [2023-08-31 12:01:34,963 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1258 places, 1386 transitions, 2868 flow [2023-08-31 12:01:34,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1258 places, 1386 transitions, 2868 flow [2023-08-31 12:01:35,567 INFO L130 PetriNetUnfolder]: 153/1480 cut-off events. [2023-08-31 12:01:35,567 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-31 12:01:35,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1541 conditions, 1480 events. 153/1480 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 9773 event pairs, 0 based on Foata normal form. 0/998 useless extension candidates. Maximal degree in co-relation 1364. Up to 18 conditions per place. [2023-08-31 12:01:35,889 INFO L119 LiptonReduction]: Number of co-enabled transitions 1644032 [2023-08-31 12:01:54,824 INFO L134 LiptonReduction]: Checked pairs total: 8166772 [2023-08-31 12:01:54,825 INFO L136 LiptonReduction]: Total number of compositions: 1044 [2023-08-31 12:01:54,827 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:01:54,828 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1f3896ce, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:01:54,828 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:01:54,999 INFO L130 PetriNetUnfolder]: 93/782 cut-off events. [2023-08-31 12:01:54,999 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-31 12:01:54,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:01:54,999 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:01:54,999 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:01:55,000 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:01:55,000 INFO L85 PathProgramCache]: Analyzing trace with hash -326645302, now seen corresponding path program 1 times [2023-08-31 12:01:55,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:01:55,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626663770] [2023-08-31 12:01:55,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:01:55,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:01:55,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:01:55,039 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:01:55,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:01:55,059 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:01:55,059 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:01:55,060 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:01:55,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 12:01:55,060 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:01:55,060 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:01:55,061 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:01:55,061 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-08-31 12:01:55,148 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:01:55,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1412 places, 1556 transitions, 3229 flow [2023-08-31 12:01:55,994 INFO L130 PetriNetUnfolder]: 172/1662 cut-off events. [2023-08-31 12:01:55,995 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-31 12:01:56,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1735 conditions, 1662 events. 172/1662 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 11107 event pairs, 0 based on Foata normal form. 0/1120 useless extension candidates. Maximal degree in co-relation 1533. Up to 20 conditions per place. [2023-08-31 12:01:56,078 INFO L82 GeneralOperation]: Start removeDead. Operand has 1412 places, 1556 transitions, 3229 flow [2023-08-31 12:01:56,097 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1412 places, 1556 transitions, 3229 flow [2023-08-31 12:01:56,098 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:01:56,098 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1412 places, 1556 transitions, 3229 flow [2023-08-31 12:01:56,098 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1412 places, 1556 transitions, 3229 flow [2023-08-31 12:01:56,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1412 places, 1556 transitions, 3229 flow [2023-08-31 12:01:56,761 INFO L130 PetriNetUnfolder]: 172/1662 cut-off events. [2023-08-31 12:01:56,762 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-31 12:01:56,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1735 conditions, 1662 events. 172/1662 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 11107 event pairs, 0 based on Foata normal form. 0/1120 useless extension candidates. Maximal degree in co-relation 1533. Up to 20 conditions per place. [2023-08-31 12:01:57,285 INFO L119 LiptonReduction]: Number of co-enabled transitions 2108106 [2023-08-31 12:02:18,170 INFO L134 LiptonReduction]: Checked pairs total: 10488351 [2023-08-31 12:02:18,170 INFO L136 LiptonReduction]: Total number of compositions: 1180 [2023-08-31 12:02:18,173 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:02:18,174 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1f3896ce, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:02:18,174 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:02:18,354 INFO L130 PetriNetUnfolder]: 108/898 cut-off events. [2023-08-31 12:02:18,354 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-31 12:02:18,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:02:18,354 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:02:18,354 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:02:18,354 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:02:18,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1214844178, now seen corresponding path program 1 times [2023-08-31 12:02:18,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:02:18,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444429632] [2023-08-31 12:02:18,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:02:18,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:02:18,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:02:18,376 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:02:18,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:02:18,398 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:02:18,398 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:02:18,398 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:02:18,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 12:02:18,399 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:02:18,399 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:02:18,399 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:02:18,400 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-08-31 12:02:18,540 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:02:18,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1566 places, 1726 transitions, 3592 flow [2023-08-31 12:02:19,386 INFO L130 PetriNetUnfolder]: 191/1844 cut-off events. [2023-08-31 12:02:19,386 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-31 12:02:19,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1930 conditions, 1844 events. 191/1844 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 12448 event pairs, 0 based on Foata normal form. 0/1242 useless extension candidates. Maximal degree in co-relation 1724. Up to 22 conditions per place. [2023-08-31 12:02:19,561 INFO L82 GeneralOperation]: Start removeDead. Operand has 1566 places, 1726 transitions, 3592 flow [2023-08-31 12:02:19,607 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1566 places, 1726 transitions, 3592 flow [2023-08-31 12:02:19,607 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:02:19,607 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1566 places, 1726 transitions, 3592 flow [2023-08-31 12:02:19,608 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1566 places, 1726 transitions, 3592 flow [2023-08-31 12:02:19,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1566 places, 1726 transitions, 3592 flow [2023-08-31 12:02:20,479 INFO L130 PetriNetUnfolder]: 191/1844 cut-off events. [2023-08-31 12:02:20,480 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-31 12:02:20,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1930 conditions, 1844 events. 191/1844 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 12448 event pairs, 0 based on Foata normal form. 0/1242 useless extension candidates. Maximal degree in co-relation 1724. Up to 22 conditions per place. [2023-08-31 12:02:21,042 INFO L119 LiptonReduction]: Number of co-enabled transitions 2629640 [2023-08-31 12:02:45,617 INFO L134 LiptonReduction]: Checked pairs total: 13150332 [2023-08-31 12:02:45,617 INFO L136 LiptonReduction]: Total number of compositions: 1323 [2023-08-31 12:02:45,620 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:02:45,621 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1f3896ce, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:02:45,621 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:02:45,882 INFO L130 PetriNetUnfolder]: 122/1020 cut-off events. [2023-08-31 12:02:45,882 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-31 12:02:45,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:02:45,882 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:02:45,882 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:02:45,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:02:45,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1732544502, now seen corresponding path program 1 times [2023-08-31 12:02:45,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:02:45,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687636982] [2023-08-31 12:02:45,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:02:45,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:02:45,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:02:45,901 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:02:45,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:02:45,931 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:02:45,931 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:02:45,931 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:02:45,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-31 12:02:45,931 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:02:45,932 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:02:45,932 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:02:45,932 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-08-31 12:02:46,028 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:02:46,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1720 places, 1896 transitions, 3957 flow [2023-08-31 12:02:47,127 INFO L130 PetriNetUnfolder]: 210/2026 cut-off events. [2023-08-31 12:02:47,127 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-08-31 12:02:47,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2126 conditions, 2026 events. 210/2026 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 13789 event pairs, 0 based on Foata normal form. 0/1364 useless extension candidates. Maximal degree in co-relation 1919. Up to 24 conditions per place. [2023-08-31 12:02:47,299 INFO L82 GeneralOperation]: Start removeDead. Operand has 1720 places, 1896 transitions, 3957 flow [2023-08-31 12:02:47,342 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1720 places, 1896 transitions, 3957 flow [2023-08-31 12:02:47,343 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:02:47,343 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1720 places, 1896 transitions, 3957 flow [2023-08-31 12:02:47,343 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1720 places, 1896 transitions, 3957 flow [2023-08-31 12:02:47,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1720 places, 1896 transitions, 3957 flow [2023-08-31 12:02:48,409 INFO L130 PetriNetUnfolder]: 210/2026 cut-off events. [2023-08-31 12:02:48,409 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-08-31 12:02:48,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2126 conditions, 2026 events. 210/2026 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 13789 event pairs, 0 based on Foata normal form. 0/1364 useless extension candidates. Maximal degree in co-relation 1919. Up to 24 conditions per place. [2023-08-31 12:02:49,496 INFO L119 LiptonReduction]: Number of co-enabled transitions 3208634 [2023-08-31 12:03:17,149 INFO L134 LiptonReduction]: Checked pairs total: 16037983 [2023-08-31 12:03:17,149 INFO L136 LiptonReduction]: Total number of compositions: 1434 [2023-08-31 12:03:17,151 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:03:17,151 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1f3896ce, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:03:17,151 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:03:17,592 INFO L130 PetriNetUnfolder]: 129/1118 cut-off events. [2023-08-31 12:03:17,593 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-08-31 12:03:17,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:03:17,593 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:03:17,593 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:03:17,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:03:17,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1333659841, now seen corresponding path program 1 times [2023-08-31 12:03:17,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:03:17,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232511465] [2023-08-31 12:03:17,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:03:17,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:03:17,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:03:17,619 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:03:17,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:03:17,638 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:03:17,638 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:03:17,638 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:03:17,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-31 12:03:17,639 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:03:17,639 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:03:17,639 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:03:17,639 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-08-31 12:03:17,730 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:03:17,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1874 places, 2066 transitions, 4324 flow [2023-08-31 12:03:19,192 INFO L130 PetriNetUnfolder]: 229/2208 cut-off events. [2023-08-31 12:03:19,193 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-08-31 12:03:19,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2323 conditions, 2208 events. 229/2208 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 15182 event pairs, 0 based on Foata normal form. 0/1486 useless extension candidates. Maximal degree in co-relation 2115. Up to 26 conditions per place. [2023-08-31 12:03:19,333 INFO L82 GeneralOperation]: Start removeDead. Operand has 1874 places, 2066 transitions, 4324 flow [2023-08-31 12:03:19,367 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1874 places, 2066 transitions, 4324 flow [2023-08-31 12:03:19,367 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:03:19,367 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1874 places, 2066 transitions, 4324 flow [2023-08-31 12:03:19,368 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1874 places, 2066 transitions, 4324 flow [2023-08-31 12:03:19,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1874 places, 2066 transitions, 4324 flow [2023-08-31 12:03:20,996 INFO L130 PetriNetUnfolder]: 229/2208 cut-off events. [2023-08-31 12:03:20,996 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-08-31 12:03:21,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2323 conditions, 2208 events. 229/2208 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 15182 event pairs, 0 based on Foata normal form. 0/1486 useless extension candidates. Maximal degree in co-relation 2115. Up to 26 conditions per place. [2023-08-31 12:03:21,841 INFO L119 LiptonReduction]: Number of co-enabled transitions 3845088 [2023-08-31 12:03:50,865 INFO L134 LiptonReduction]: Checked pairs total: 19111694 [2023-08-31 12:03:50,865 INFO L136 LiptonReduction]: Total number of compositions: 1512 [2023-08-31 12:03:50,867 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:03:50,868 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1f3896ce, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:03:50,868 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:03:51,241 INFO L130 PetriNetUnfolder]: 145/1239 cut-off events. [2023-08-31 12:03:51,242 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-08-31 12:03:51,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:03:51,242 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 12:03:51,242 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:03:51,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:03:51,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1242867444, now seen corresponding path program 1 times [2023-08-31 12:03:51,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:03:51,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412886886] [2023-08-31 12:03:51,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:03:51,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:03:51,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:03:51,270 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:03:51,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:03:51,293 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:03:51,294 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:03:51,294 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:03:51,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-31 12:03:51,294 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:03:51,295 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:03:51,295 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:03:51,295 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-08-31 12:03:51,404 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:03:51,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2028 places, 2236 transitions, 4693 flow [2023-08-31 12:03:53,233 INFO L130 PetriNetUnfolder]: 248/2390 cut-off events. [2023-08-31 12:03:53,233 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-08-31 12:03:53,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2521 conditions, 2390 events. 248/2390 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 16520 event pairs, 0 based on Foata normal form. 0/1608 useless extension candidates. Maximal degree in co-relation 2312. Up to 28 conditions per place. [2023-08-31 12:03:53,412 INFO L82 GeneralOperation]: Start removeDead. Operand has 2028 places, 2236 transitions, 4693 flow [2023-08-31 12:03:53,454 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2028 places, 2236 transitions, 4693 flow [2023-08-31 12:03:53,454 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:03:53,454 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2028 places, 2236 transitions, 4693 flow [2023-08-31 12:03:53,454 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2028 places, 2236 transitions, 4693 flow [2023-08-31 12:03:53,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2028 places, 2236 transitions, 4693 flow [2023-08-31 12:03:55,183 INFO L130 PetriNetUnfolder]: 248/2390 cut-off events. [2023-08-31 12:03:55,183 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-08-31 12:03:55,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2521 conditions, 2390 events. 248/2390 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 16520 event pairs, 0 based on Foata normal form. 0/1608 useless extension candidates. Maximal degree in co-relation 2312. Up to 28 conditions per place. [2023-08-31 12:03:56,051 INFO L119 LiptonReduction]: Number of co-enabled transitions 4539002 [2023-08-31 12:04:28,684 INFO L134 LiptonReduction]: Checked pairs total: 22673088 [2023-08-31 12:04:28,684 INFO L136 LiptonReduction]: Total number of compositions: 1649 [2023-08-31 12:04:28,686 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:04:28,687 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1f3896ce, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:04:28,687 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:04:29,206 INFO L130 PetriNetUnfolder]: 160/1368 cut-off events. [2023-08-31 12:04:29,207 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-08-31 12:04:29,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:04:29,207 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 12:04:29,207 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:04:29,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:04:29,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1748423122, now seen corresponding path program 1 times [2023-08-31 12:04:29,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:04:29,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450937698] [2023-08-31 12:04:29,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:04:29,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:04:29,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:04:29,234 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:04:29,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:04:29,258 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:04:29,258 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:04:29,258 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:04:29,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-31 12:04:29,259 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:04:29,259 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:04:29,259 WARN L233 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:04:29,259 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2023-08-31 12:04:29,391 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:04:29,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2182 places, 2406 transitions, 5064 flow [2023-08-31 12:04:31,526 INFO L130 PetriNetUnfolder]: 267/2572 cut-off events. [2023-08-31 12:04:31,527 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-08-31 12:04:31,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2720 conditions, 2572 events. 267/2572 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 17835 event pairs, 0 based on Foata normal form. 0/1730 useless extension candidates. Maximal degree in co-relation 2510. Up to 30 conditions per place. [2023-08-31 12:04:31,779 INFO L82 GeneralOperation]: Start removeDead. Operand has 2182 places, 2406 transitions, 5064 flow [2023-08-31 12:04:31,837 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2182 places, 2406 transitions, 5064 flow [2023-08-31 12:04:31,837 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:04:31,837 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2182 places, 2406 transitions, 5064 flow [2023-08-31 12:04:31,837 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2182 places, 2406 transitions, 5064 flow [2023-08-31 12:04:31,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2182 places, 2406 transitions, 5064 flow [2023-08-31 12:04:34,190 INFO L130 PetriNetUnfolder]: 267/2572 cut-off events. [2023-08-31 12:04:34,190 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-08-31 12:04:34,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2720 conditions, 2572 events. 267/2572 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 17835 event pairs, 0 based on Foata normal form. 0/1730 useless extension candidates. Maximal degree in co-relation 2510. Up to 30 conditions per place. [2023-08-31 12:04:35,324 INFO L119 LiptonReduction]: Number of co-enabled transitions 5290376 [2023-08-31 12:05:11,406 INFO L134 LiptonReduction]: Checked pairs total: 26417836 [2023-08-31 12:05:11,406 INFO L136 LiptonReduction]: Total number of compositions: 1763 [2023-08-31 12:05:11,408 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:05:11,408 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1f3896ce, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:05:11,409 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:05:11,963 INFO L130 PetriNetUnfolder]: 176/1465 cut-off events. [2023-08-31 12:05:11,963 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-08-31 12:05:11,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:05:11,963 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 12:05:11,963 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:05:11,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:05:11,964 INFO L85 PathProgramCache]: Analyzing trace with hash -79886048, now seen corresponding path program 1 times [2023-08-31 12:05:11,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:05:11,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302305783] [2023-08-31 12:05:11,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:05:11,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:05:12,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:05:12,030 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:05:12,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:05:12,068 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:05:12,069 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:05:12,069 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:05:12,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-31 12:05:12,069 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:05:12,071 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:05:12,071 WARN L233 ceAbstractionStarter]: 14 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:05:12,071 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 15 thread instances. [2023-08-31 12:05:12,173 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:05:12,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2336 places, 2576 transitions, 5437 flow [2023-08-31 12:05:14,740 INFO L130 PetriNetUnfolder]: 286/2754 cut-off events. [2023-08-31 12:05:14,740 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-08-31 12:05:14,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2920 conditions, 2754 events. 286/2754 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 19187 event pairs, 0 based on Foata normal form. 0/1852 useless extension candidates. Maximal degree in co-relation 2709. Up to 32 conditions per place. [2023-08-31 12:05:14,984 INFO L82 GeneralOperation]: Start removeDead. Operand has 2336 places, 2576 transitions, 5437 flow [2023-08-31 12:05:15,041 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2336 places, 2576 transitions, 5437 flow [2023-08-31 12:05:15,041 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:05:15,041 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2336 places, 2576 transitions, 5437 flow [2023-08-31 12:05:15,042 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2336 places, 2576 transitions, 5437 flow [2023-08-31 12:05:15,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2336 places, 2576 transitions, 5437 flow [2023-08-31 12:05:18,109 INFO L130 PetriNetUnfolder]: 286/2754 cut-off events. [2023-08-31 12:05:18,109 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-08-31 12:05:18,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2920 conditions, 2754 events. 286/2754 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 19187 event pairs, 0 based on Foata normal form. 0/1852 useless extension candidates. Maximal degree in co-relation 2709. Up to 32 conditions per place. [2023-08-31 12:05:19,462 INFO L119 LiptonReduction]: Number of co-enabled transitions 6099210 [2023-08-31 12:05:58,170 INFO L134 LiptonReduction]: Checked pairs total: 30316062 [2023-08-31 12:05:58,170 INFO L136 LiptonReduction]: Total number of compositions: 1961 [2023-08-31 12:05:58,172 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:05:58,173 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1f3896ce, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:05:58,173 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:05:58,899 INFO L130 PetriNetUnfolder]: 193/1604 cut-off events. [2023-08-31 12:05:58,899 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-08-31 12:05:58,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:05:58,899 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 12:05:58,900 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:05:58,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:05:58,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1193725195, now seen corresponding path program 1 times [2023-08-31 12:05:58,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:05:58,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158712378] [2023-08-31 12:05:58,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:05:58,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:05:58,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:05:58,930 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:05:58,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:05:58,957 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:05:58,957 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:05:58,957 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:05:58,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-31 12:05:58,958 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:05:58,958 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:05:58,958 WARN L233 ceAbstractionStarter]: 15 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:05:58,958 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 16 thread instances. [2023-08-31 12:05:59,084 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:05:59,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2490 places, 2746 transitions, 5812 flow [2023-08-31 12:06:01,901 INFO L130 PetriNetUnfolder]: 305/2936 cut-off events. [2023-08-31 12:06:01,901 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-08-31 12:06:02,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3121 conditions, 2936 events. 305/2936 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 20540 event pairs, 0 based on Foata normal form. 0/1974 useless extension candidates. Maximal degree in co-relation 2909. Up to 34 conditions per place. [2023-08-31 12:06:02,199 INFO L82 GeneralOperation]: Start removeDead. Operand has 2490 places, 2746 transitions, 5812 flow [2023-08-31 12:06:02,266 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2490 places, 2746 transitions, 5812 flow [2023-08-31 12:06:02,266 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:06:02,266 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2490 places, 2746 transitions, 5812 flow [2023-08-31 12:06:02,266 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2490 places, 2746 transitions, 5812 flow [2023-08-31 12:06:02,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2490 places, 2746 transitions, 5812 flow [2023-08-31 12:06:05,172 INFO L130 PetriNetUnfolder]: 305/2936 cut-off events. [2023-08-31 12:06:05,173 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-08-31 12:06:05,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3121 conditions, 2936 events. 305/2936 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 20540 event pairs, 0 based on Foata normal form. 0/1974 useless extension candidates. Maximal degree in co-relation 2909. Up to 34 conditions per place. [2023-08-31 12:06:06,703 INFO L119 LiptonReduction]: Number of co-enabled transitions 6965504 [2023-08-31 12:06:51,040 INFO L134 LiptonReduction]: Checked pairs total: 38889576 [2023-08-31 12:06:51,040 INFO L136 LiptonReduction]: Total number of compositions: 2095 [2023-08-31 12:06:51,042 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:06:51,042 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1f3896ce, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:06:51,043 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:06:51,876 INFO L130 PetriNetUnfolder]: 208/1717 cut-off events. [2023-08-31 12:06:51,876 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-08-31 12:06:51,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:06:51,876 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 12:06:51,876 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:06:51,876 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:06:51,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1617658814, now seen corresponding path program 1 times [2023-08-31 12:06:51,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:06:51,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477593056] [2023-08-31 12:06:51,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:06:51,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:06:51,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:06:51,903 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:06:51,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:06:51,928 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:06:51,928 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:06:51,928 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:06:51,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-31 12:06:51,928 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:06:51,929 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:06:51,929 WARN L233 ceAbstractionStarter]: 16 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:06:51,929 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 17 thread instances. [2023-08-31 12:06:52,038 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:06:52,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2644 places, 2916 transitions, 6189 flow [2023-08-31 12:06:54,962 INFO L130 PetriNetUnfolder]: 324/3118 cut-off events. [2023-08-31 12:06:54,962 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-08-31 12:06:55,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3323 conditions, 3118 events. 324/3118 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 21901 event pairs, 0 based on Foata normal form. 0/2096 useless extension candidates. Maximal degree in co-relation 3110. Up to 36 conditions per place. [2023-08-31 12:06:55,295 INFO L82 GeneralOperation]: Start removeDead. Operand has 2644 places, 2916 transitions, 6189 flow [2023-08-31 12:06:55,508 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2644 places, 2916 transitions, 6189 flow [2023-08-31 12:06:55,508 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:06:55,508 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2644 places, 2916 transitions, 6189 flow [2023-08-31 12:06:55,508 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2644 places, 2916 transitions, 6189 flow [2023-08-31 12:06:55,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2644 places, 2916 transitions, 6189 flow [2023-08-31 12:06:58,362 INFO L130 PetriNetUnfolder]: 324/3118 cut-off events. [2023-08-31 12:06:58,362 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-08-31 12:06:58,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3323 conditions, 3118 events. 324/3118 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 21901 event pairs, 0 based on Foata normal form. 0/2096 useless extension candidates. Maximal degree in co-relation 3110. Up to 36 conditions per place. [2023-08-31 12:07:00,030 INFO L119 LiptonReduction]: Number of co-enabled transitions 7889258 [2023-08-31 12:07:48,114 INFO L134 LiptonReduction]: Checked pairs total: 39337175 [2023-08-31 12:07:48,115 INFO L136 LiptonReduction]: Total number of compositions: 2218 [2023-08-31 12:07:48,117 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:07:48,118 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1f3896ce, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:07:48,118 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:07:49,077 INFO L130 PetriNetUnfolder]: 216/1818 cut-off events. [2023-08-31 12:07:49,077 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-08-31 12:07:49,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:07:49,077 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 12:07:49,077 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:07:49,077 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:07:49,077 INFO L85 PathProgramCache]: Analyzing trace with hash 2112075692, now seen corresponding path program 1 times [2023-08-31 12:07:49,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:07:49,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990168842] [2023-08-31 12:07:49,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:07:49,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:07:49,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:07:49,113 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:07:49,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:07:49,141 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:07:49,142 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:07:49,142 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:07:49,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-31 12:07:49,142 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:07:49,143 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:07:49,143 WARN L233 ceAbstractionStarter]: 17 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:07:49,143 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 18 thread instances. [2023-08-31 12:07:49,374 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:07:49,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2798 places, 3086 transitions, 6568 flow [2023-08-31 12:07:52,944 INFO L130 PetriNetUnfolder]: 343/3300 cut-off events. [2023-08-31 12:07:52,944 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-08-31 12:07:53,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3526 conditions, 3300 events. 343/3300 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 23206 event pairs, 0 based on Foata normal form. 0/2218 useless extension candidates. Maximal degree in co-relation 3312. Up to 38 conditions per place. [2023-08-31 12:07:53,317 INFO L82 GeneralOperation]: Start removeDead. Operand has 2798 places, 3086 transitions, 6568 flow [2023-08-31 12:07:53,396 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2798 places, 3086 transitions, 6568 flow [2023-08-31 12:07:53,397 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:07:53,397 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2798 places, 3086 transitions, 6568 flow [2023-08-31 12:07:53,397 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2798 places, 3086 transitions, 6568 flow [2023-08-31 12:07:53,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2798 places, 3086 transitions, 6568 flow [2023-08-31 12:07:57,485 INFO L130 PetriNetUnfolder]: 343/3300 cut-off events. [2023-08-31 12:07:57,485 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-08-31 12:07:58,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3526 conditions, 3300 events. 343/3300 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 23206 event pairs, 0 based on Foata normal form. 0/2218 useless extension candidates. Maximal degree in co-relation 3312. Up to 38 conditions per place. [2023-08-31 12:08:00,018 INFO L119 LiptonReduction]: Number of co-enabled transitions 8870472 [2023-08-31 12:08:51,412 INFO L134 LiptonReduction]: Checked pairs total: 44425765 [2023-08-31 12:08:51,412 INFO L136 LiptonReduction]: Total number of compositions: 2323 [2023-08-31 12:08:51,414 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:08:51,415 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1f3896ce, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:08:51,415 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:08:52,699 INFO L130 PetriNetUnfolder]: 228/1933 cut-off events. [2023-08-31 12:08:52,700 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-08-31 12:08:52,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:08:52,700 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 12:08:52,700 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:08:52,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:08:52,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1542767160, now seen corresponding path program 1 times [2023-08-31 12:08:52,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:08:52,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352084040] [2023-08-31 12:08:52,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:08:52,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:08:52,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:08:52,736 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:08:52,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:08:52,766 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:08:52,767 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:08:52,767 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:08:52,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-31 12:08:52,767 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:08:52,768 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:08:52,768 WARN L233 ceAbstractionStarter]: 18 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:08:52,768 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 19 thread instances. [2023-08-31 12:08:52,932 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:08:52,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2952 places, 3256 transitions, 6949 flow [2023-08-31 12:08:56,861 INFO L130 PetriNetUnfolder]: 362/3482 cut-off events. [2023-08-31 12:08:56,861 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-08-31 12:08:57,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3730 conditions, 3482 events. 362/3482 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 24557 event pairs, 0 based on Foata normal form. 0/2340 useless extension candidates. Maximal degree in co-relation 3515. Up to 40 conditions per place. [2023-08-31 12:08:57,283 INFO L82 GeneralOperation]: Start removeDead. Operand has 2952 places, 3256 transitions, 6949 flow [2023-08-31 12:08:57,398 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2952 places, 3256 transitions, 6949 flow [2023-08-31 12:08:57,398 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:08:57,398 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2952 places, 3256 transitions, 6949 flow [2023-08-31 12:08:57,398 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2952 places, 3256 transitions, 6949 flow [2023-08-31 12:08:57,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2952 places, 3256 transitions, 6949 flow [2023-08-31 12:09:01,275 INFO L130 PetriNetUnfolder]: 362/3482 cut-off events. [2023-08-31 12:09:01,275 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-08-31 12:09:01,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3730 conditions, 3482 events. 362/3482 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 24557 event pairs, 0 based on Foata normal form. 0/2340 useless extension candidates. Maximal degree in co-relation 3515. Up to 40 conditions per place. [2023-08-31 12:09:03,480 INFO L119 LiptonReduction]: Number of co-enabled transitions 9909146 [2023-08-31 12:09:59,267 INFO L134 LiptonReduction]: Checked pairs total: 49513505 [2023-08-31 12:09:59,268 INFO L136 LiptonReduction]: Total number of compositions: 2449 [2023-08-31 12:09:59,270 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:09:59,270 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1f3896ce, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:09:59,270 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:10:00,575 INFO L130 PetriNetUnfolder]: 237/2037 cut-off events. [2023-08-31 12:10:00,575 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-08-31 12:10:00,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:10:00,575 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 12:10:00,575 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:10:00,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:10:00,576 INFO L85 PathProgramCache]: Analyzing trace with hash -2094486495, now seen corresponding path program 1 times [2023-08-31 12:10:00,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:10:00,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285992009] [2023-08-31 12:10:00,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:10:00,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:10:00,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:10:00,609 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:10:00,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:10:00,640 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:10:00,640 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:10:00,641 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:10:00,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-31 12:10:00,641 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:10:00,641 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:10:00,642 WARN L233 ceAbstractionStarter]: 19 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:10:00,642 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 20 thread instances. [2023-08-31 12:10:00,816 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:10:00,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 3106 places, 3426 transitions, 7332 flow [2023-08-31 12:10:05,161 INFO L130 PetriNetUnfolder]: 381/3664 cut-off events. [2023-08-31 12:10:05,162 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-08-31 12:10:05,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3935 conditions, 3664 events. 381/3664 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 25928 event pairs, 0 based on Foata normal form. 0/2462 useless extension candidates. Maximal degree in co-relation 3719. Up to 42 conditions per place. [2023-08-31 12:10:05,631 INFO L82 GeneralOperation]: Start removeDead. Operand has 3106 places, 3426 transitions, 7332 flow [2023-08-31 12:10:05,994 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 3106 places, 3426 transitions, 7332 flow [2023-08-31 12:10:05,994 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:10:05,995 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 3106 places, 3426 transitions, 7332 flow [2023-08-31 12:10:05,995 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 3106 places, 3426 transitions, 7332 flow [2023-08-31 12:10:05,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 3106 places, 3426 transitions, 7332 flow [2023-08-31 12:10:10,381 INFO L130 PetriNetUnfolder]: 381/3664 cut-off events. [2023-08-31 12:10:10,381 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-08-31 12:10:10,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3935 conditions, 3664 events. 381/3664 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 25928 event pairs, 0 based on Foata normal form. 0/2462 useless extension candidates. Maximal degree in co-relation 3719. Up to 42 conditions per place. [2023-08-31 12:10:12,881 INFO L119 LiptonReduction]: Number of co-enabled transitions 11005280 [2023-08-31 12:11:11,495 INFO L134 LiptonReduction]: Checked pairs total: 68493027 [2023-08-31 12:11:11,495 INFO L136 LiptonReduction]: Total number of compositions: 2542 [2023-08-31 12:11:11,497 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:11:11,498 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1f3896ce, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:11:11,498 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:11:13,014 INFO L130 PetriNetUnfolder]: 258/2160 cut-off events. [2023-08-31 12:11:13,014 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-08-31 12:11:13,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:11:13,014 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 12:11:13,014 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:11:13,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:11:13,014 INFO L85 PathProgramCache]: Analyzing trace with hash -456241059, now seen corresponding path program 1 times [2023-08-31 12:11:13,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:11:13,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132162809] [2023-08-31 12:11:13,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:11:13,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:11:13,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:11:13,055 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:11:13,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:11:13,090 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:11:13,090 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:11:13,090 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:11:13,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-31 12:11:13,091 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:11:13,091 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:11:13,091 WARN L233 ceAbstractionStarter]: 20 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:11:13,091 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 21 thread instances. [2023-08-31 12:11:13,270 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:11:13,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 3260 places, 3596 transitions, 7717 flow [2023-08-31 12:11:18,108 INFO L130 PetriNetUnfolder]: 400/3846 cut-off events. [2023-08-31 12:11:18,109 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-08-31 12:11:18,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4141 conditions, 3846 events. 400/3846 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 27277 event pairs, 0 based on Foata normal form. 0/2584 useless extension candidates. Maximal degree in co-relation 3924. Up to 44 conditions per place. [2023-08-31 12:11:18,842 INFO L82 GeneralOperation]: Start removeDead. Operand has 3260 places, 3596 transitions, 7717 flow [2023-08-31 12:11:18,993 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 3260 places, 3596 transitions, 7717 flow [2023-08-31 12:11:18,993 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:11:18,994 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 3260 places, 3596 transitions, 7717 flow [2023-08-31 12:11:18,994 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 3260 places, 3596 transitions, 7717 flow [2023-08-31 12:11:18,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 3260 places, 3596 transitions, 7717 flow [2023-08-31 12:11:23,902 INFO L130 PetriNetUnfolder]: 400/3846 cut-off events. [2023-08-31 12:11:23,903 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-08-31 12:11:24,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4141 conditions, 3846 events. 400/3846 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 27277 event pairs, 0 based on Foata normal form. 0/2584 useless extension candidates. Maximal degree in co-relation 3924. Up to 44 conditions per place. [2023-08-31 12:11:26,771 INFO L119 LiptonReduction]: Number of co-enabled transitions 12158874 Killed by 15