./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_05-lockfuns_racefree.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_05-lockfuns_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1fe12ce8951e45860142b9cebaa325eef531c18fa917882c03ee5396afb187f5 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 00:27:15,547 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 00:27:15,549 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 00:27:15,593 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 00:27:15,594 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 00:27:15,605 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 00:27:15,607 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 00:27:15,610 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 00:27:15,612 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 00:27:15,616 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 00:27:15,617 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 00:27:15,620 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 00:27:15,620 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 00:27:15,622 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 00:27:15,623 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 00:27:15,628 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 00:27:15,629 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 00:27:15,630 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 00:27:15,632 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 00:27:15,637 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 00:27:15,638 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 00:27:15,639 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 00:27:15,639 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 00:27:15,640 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 00:27:15,643 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 00:27:15,643 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 00:27:15,643 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 00:27:15,645 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 00:27:15,645 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 00:27:15,646 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 00:27:15,646 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 00:27:15,647 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 00:27:15,649 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 00:27:15,650 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 00:27:15,650 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 00:27:15,650 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 00:27:15,651 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 00:27:15,651 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 00:27:15,651 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 00:27:15,652 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 00:27:15,652 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 00:27:15,654 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 00:27:15,685 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 00:27:15,685 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 00:27:15,686 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 00:27:15,686 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 00:27:15,687 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 00:27:15,687 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 00:27:15,688 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 00:27:15,688 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 00:27:15,688 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 00:27:15,688 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 00:27:15,689 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 00:27:15,689 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 00:27:15,689 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 00:27:15,690 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 00:27:15,690 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 00:27:15,690 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 00:27:15,690 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 00:27:15,690 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 00:27:15,690 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 00:27:15,691 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 00:27:15,691 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 00:27:15,691 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 00:27:15,691 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 00:27:15,691 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 00:27:15,691 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 00:27:15,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 00:27:15,692 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 00:27:15,692 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 00:27:15,692 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 00:27:15,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 00:27:15,693 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 00:27:15,693 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 00:27:15,693 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 00:27:15,693 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 00:27:15,693 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1fe12ce8951e45860142b9cebaa325eef531c18fa917882c03ee5396afb187f5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 00:27:15,996 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 00:27:16,015 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 00:27:16,017 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 00:27:16,018 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 00:27:16,018 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 00:27:16,019 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_05-lockfuns_racefree.i [2023-09-01 00:27:17,607 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 00:27:17,828 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 00:27:17,829 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_05-lockfuns_racefree.i [2023-09-01 00:27:17,838 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c425afbf8/a6c4176898894f00b12cae9e612896f5/FLAGf66465269 [2023-09-01 00:27:17,855 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c425afbf8/a6c4176898894f00b12cae9e612896f5 [2023-09-01 00:27:17,859 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 00:27:17,860 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 00:27:17,863 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 00:27:17,863 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 00:27:17,865 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 00:27:17,866 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:27:17" (1/1) ... [2023-09-01 00:27:17,867 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b235ecb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:27:17, skipping insertion in model container [2023-09-01 00:27:17,867 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:27:17" (1/1) ... [2023-09-01 00:27:17,872 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 00:27:17,914 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 00:27:18,148 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_05-lockfuns_racefree.i[30176,30189] [2023-09-01 00:27:18,174 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 00:27:18,185 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 00:27:18,223 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_05-lockfuns_racefree.i[30176,30189] [2023-09-01 00:27:18,244 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 00:27:18,295 INFO L208 MainTranslator]: Completed translation [2023-09-01 00:27:18,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:27:18 WrapperNode [2023-09-01 00:27:18,298 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 00:27:18,299 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 00:27:18,299 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 00:27:18,299 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 00:27:18,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:27:18" (1/1) ... [2023-09-01 00:27:18,330 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:27:18" (1/1) ... [2023-09-01 00:27:18,358 INFO L138 Inliner]: procedures = 172, calls = 33, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 106 [2023-09-01 00:27:18,358 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 00:27:18,360 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 00:27:18,360 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 00:27:18,360 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 00:27:18,367 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:27:18" (1/1) ... [2023-09-01 00:27:18,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:27:18" (1/1) ... [2023-09-01 00:27:18,370 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:27:18" (1/1) ... [2023-09-01 00:27:18,371 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:27:18" (1/1) ... [2023-09-01 00:27:18,375 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:27:18" (1/1) ... [2023-09-01 00:27:18,378 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:27:18" (1/1) ... [2023-09-01 00:27:18,379 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:27:18" (1/1) ... [2023-09-01 00:27:18,380 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:27:18" (1/1) ... [2023-09-01 00:27:18,383 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 00:27:18,391 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 00:27:18,391 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 00:27:18,391 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 00:27:18,392 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:27:18" (1/1) ... [2023-09-01 00:27:18,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 00:27:18,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:27:18,422 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 00:27:18,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 00:27:18,468 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 00:27:18,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 00:27:18,469 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 00:27:18,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 00:27:18,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 00:27:18,469 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-09-01 00:27:18,469 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-09-01 00:27:18,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 00:27:18,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 00:27:18,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 00:27:18,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 00:27:18,471 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 00:27:18,615 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 00:27:18,624 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 00:27:18,786 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 00:27:18,792 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 00:27:18,792 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-09-01 00:27:18,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:27:18 BoogieIcfgContainer [2023-09-01 00:27:18,794 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 00:27:18,795 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 00:27:18,796 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 00:27:18,798 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 00:27:18,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 12:27:17" (1/3) ... [2023-09-01 00:27:18,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@280259f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:27:18, skipping insertion in model container [2023-09-01 00:27:18,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:27:18" (2/3) ... [2023-09-01 00:27:18,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@280259f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:27:18, skipping insertion in model container [2023-09-01 00:27:18,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:27:18" (3/3) ... [2023-09-01 00:27:18,801 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_05-lockfuns_racefree.i [2023-09-01 00:27:18,825 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 00:27:18,825 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-09-01 00:27:18,825 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 00:27:18,875 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-09-01 00:27:18,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 111 transitions, 230 flow [2023-09-01 00:27:18,953 INFO L130 PetriNetUnfolder]: 17/153 cut-off events. [2023-09-01 00:27:18,953 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 00:27:18,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 153 events. 17/153 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 390 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 77. Up to 4 conditions per place. [2023-09-01 00:27:18,958 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 111 transitions, 230 flow [2023-09-01 00:27:18,961 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 98 places, 106 transitions, 217 flow [2023-09-01 00:27:18,964 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:27:18,981 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 98 places, 106 transitions, 217 flow [2023-09-01 00:27:18,983 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 98 places, 106 transitions, 217 flow [2023-09-01 00:27:18,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 106 transitions, 217 flow [2023-09-01 00:27:19,027 INFO L130 PetriNetUnfolder]: 16/148 cut-off events. [2023-09-01 00:27:19,027 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:27:19,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153 conditions, 148 events. 16/148 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 375 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 77. Up to 4 conditions per place. [2023-09-01 00:27:19,030 INFO L119 LiptonReduction]: Number of co-enabled transitions 2880 [2023-09-01 00:27:21,466 INFO L134 LiptonReduction]: Checked pairs total: 4629 [2023-09-01 00:27:21,466 INFO L136 LiptonReduction]: Total number of compositions: 90 [2023-09-01 00:27:21,488 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:27:21,493 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3c3619d4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:27:21,493 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:27:21,498 INFO L130 PetriNetUnfolder]: 3/30 cut-off events. [2023-09-01 00:27:21,498 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:27:21,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:27:21,499 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-09-01 00:27:21,499 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:27:21,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:27:21,504 INFO L85 PathProgramCache]: Analyzing trace with hash -191675277, now seen corresponding path program 1 times [2023-09-01 00:27:21,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:27:21,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205983352] [2023-09-01 00:27:21,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:27:21,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:27:21,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:27:21,603 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:27:21,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:27:21,641 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:27:21,642 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:27:21,643 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:27:21,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 00:27:21,645 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:27:21,647 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:27:21,648 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:27:21,648 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-09-01 00:27:21,665 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 00:27:21,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 143 transitions, 304 flow [2023-09-01 00:27:21,701 INFO L130 PetriNetUnfolder]: 31/256 cut-off events. [2023-09-01 00:27:21,701 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 00:27:21,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270 conditions, 256 events. 31/256 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 797 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 155. Up to 8 conditions per place. [2023-09-01 00:27:21,704 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 143 transitions, 304 flow [2023-09-01 00:27:21,705 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 143 transitions, 304 flow [2023-09-01 00:27:21,706 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:27:21,706 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 129 places, 143 transitions, 304 flow [2023-09-01 00:27:21,706 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 129 places, 143 transitions, 304 flow [2023-09-01 00:27:21,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 143 transitions, 304 flow [2023-09-01 00:27:21,738 INFO L130 PetriNetUnfolder]: 31/256 cut-off events. [2023-09-01 00:27:21,739 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 00:27:21,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270 conditions, 256 events. 31/256 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 797 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 155. Up to 8 conditions per place. [2023-09-01 00:27:21,746 INFO L119 LiptonReduction]: Number of co-enabled transitions 8220 [2023-09-01 00:27:23,980 INFO L134 LiptonReduction]: Checked pairs total: 18857 [2023-09-01 00:27:23,980 INFO L136 LiptonReduction]: Total number of compositions: 108 [2023-09-01 00:27:23,983 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:27:23,984 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3c3619d4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:27:23,984 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:27:23,989 INFO L130 PetriNetUnfolder]: 10/66 cut-off events. [2023-09-01 00:27:23,990 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 00:27:23,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:27:23,990 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-09-01 00:27:23,990 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:27:23,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:27:23,991 INFO L85 PathProgramCache]: Analyzing trace with hash 207991020, now seen corresponding path program 1 times [2023-09-01 00:27:23,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:27:23,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73375270] [2023-09-01 00:27:23,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:27:23,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:27:24,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:27:24,035 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:27:24,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:27:24,072 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:27:24,072 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:27:24,073 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:27:24,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 00:27:24,073 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:27:24,077 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:27:24,077 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:27:24,077 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-09-01 00:27:24,106 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 00:27:24,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 156 places, 175 transitions, 380 flow [2023-09-01 00:27:24,160 INFO L130 PetriNetUnfolder]: 50/400 cut-off events. [2023-09-01 00:27:24,160 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-09-01 00:27:24,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 428 conditions, 400 events. 50/400 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1445 event pairs, 1 based on Foata normal form. 0/310 useless extension candidates. Maximal degree in co-relation 264. Up to 16 conditions per place. [2023-09-01 00:27:24,166 INFO L82 GeneralOperation]: Start removeDead. Operand has 156 places, 175 transitions, 380 flow [2023-09-01 00:27:24,169 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 156 places, 175 transitions, 380 flow [2023-09-01 00:27:24,169 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:27:24,169 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 156 places, 175 transitions, 380 flow [2023-09-01 00:27:24,174 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 156 places, 175 transitions, 380 flow [2023-09-01 00:27:24,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 156 places, 175 transitions, 380 flow [2023-09-01 00:27:24,213 INFO L130 PetriNetUnfolder]: 50/400 cut-off events. [2023-09-01 00:27:24,214 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-09-01 00:27:24,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 428 conditions, 400 events. 50/400 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1445 event pairs, 1 based on Foata normal form. 0/310 useless extension candidates. Maximal degree in co-relation 264. Up to 16 conditions per place. [2023-09-01 00:27:24,228 INFO L119 LiptonReduction]: Number of co-enabled transitions 15300 [2023-09-01 00:27:26,521 INFO L134 LiptonReduction]: Checked pairs total: 35976 [2023-09-01 00:27:26,521 INFO L136 LiptonReduction]: Total number of compositions: 124 [2023-09-01 00:27:26,523 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:27:26,524 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3c3619d4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:27:26,524 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:27:26,532 INFO L130 PetriNetUnfolder]: 22/112 cut-off events. [2023-09-01 00:27:26,532 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-09-01 00:27:26,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:27:26,532 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-09-01 00:27:26,532 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:27:26,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:27:26,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1987449295, now seen corresponding path program 1 times [2023-09-01 00:27:26,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:27:26,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311609363] [2023-09-01 00:27:26,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:27:26,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:27:26,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:27:26,581 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:27:26,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:27:26,611 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:27:26,611 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:27:26,612 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:27:26,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 00:27:26,612 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:27:26,612 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:27:26,613 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:27:26,613 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-09-01 00:27:26,637 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-09-01 00:27:26,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 207 transitions, 458 flow [2023-09-01 00:27:26,727 INFO L130 PetriNetUnfolder]: 81/628 cut-off events. [2023-09-01 00:27:26,727 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-09-01 00:27:26,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 683 conditions, 628 events. 81/628 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2620 event pairs, 6 based on Foata normal form. 0/484 useless extension candidates. Maximal degree in co-relation 420. Up to 32 conditions per place. [2023-09-01 00:27:26,733 INFO L82 GeneralOperation]: Start removeDead. Operand has 183 places, 207 transitions, 458 flow [2023-09-01 00:27:26,737 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 183 places, 207 transitions, 458 flow [2023-09-01 00:27:26,738 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:27:26,738 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 183 places, 207 transitions, 458 flow [2023-09-01 00:27:26,738 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 183 places, 207 transitions, 458 flow [2023-09-01 00:27:26,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 207 transitions, 458 flow [2023-09-01 00:27:26,811 INFO L130 PetriNetUnfolder]: 81/628 cut-off events. [2023-09-01 00:27:26,812 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-09-01 00:27:26,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 683 conditions, 628 events. 81/628 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2620 event pairs, 6 based on Foata normal form. 0/484 useless extension candidates. Maximal degree in co-relation 420. Up to 32 conditions per place. [2023-09-01 00:27:26,837 INFO L119 LiptonReduction]: Number of co-enabled transitions 24360 [2023-09-01 00:27:29,307 INFO L134 LiptonReduction]: Checked pairs total: 60533 [2023-09-01 00:27:29,308 INFO L136 LiptonReduction]: Total number of compositions: 142 [2023-09-01 00:27:29,309 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:27:29,310 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3c3619d4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:27:29,310 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:27:29,328 INFO L130 PetriNetUnfolder]: 29/155 cut-off events. [2023-09-01 00:27:29,328 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-09-01 00:27:29,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:27:29,328 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-09-01 00:27:29,329 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:27:29,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:27:29,329 INFO L85 PathProgramCache]: Analyzing trace with hash 882887531, now seen corresponding path program 1 times [2023-09-01 00:27:29,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:27:29,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583207188] [2023-09-01 00:27:29,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:27:29,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:27:29,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:27:29,380 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:27:29,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:27:29,414 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:27:29,418 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:27:29,418 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:27:29,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 00:27:29,418 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:27:29,419 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:27:29,419 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:27:29,419 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-09-01 00:27:29,451 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-09-01 00:27:29,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 239 transitions, 538 flow [2023-09-01 00:27:29,629 INFO L130 PetriNetUnfolder]: 140/1028 cut-off events. [2023-09-01 00:27:29,629 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-09-01 00:27:29,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1139 conditions, 1028 events. 140/1028 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5125 event pairs, 23 based on Foata normal form. 0/790 useless extension candidates. Maximal degree in co-relation 673. Up to 80 conditions per place. [2023-09-01 00:27:29,641 INFO L82 GeneralOperation]: Start removeDead. Operand has 210 places, 239 transitions, 538 flow [2023-09-01 00:27:29,649 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 210 places, 239 transitions, 538 flow [2023-09-01 00:27:29,649 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:27:29,649 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 210 places, 239 transitions, 538 flow [2023-09-01 00:27:29,650 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 210 places, 239 transitions, 538 flow [2023-09-01 00:27:29,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 239 transitions, 538 flow [2023-09-01 00:27:29,800 INFO L130 PetriNetUnfolder]: 140/1028 cut-off events. [2023-09-01 00:27:29,800 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-09-01 00:27:29,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1139 conditions, 1028 events. 140/1028 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5125 event pairs, 23 based on Foata normal form. 0/790 useless extension candidates. Maximal degree in co-relation 673. Up to 80 conditions per place. [2023-09-01 00:27:29,838 INFO L119 LiptonReduction]: Number of co-enabled transitions 35400 [2023-09-01 00:27:32,349 INFO L134 LiptonReduction]: Checked pairs total: 91054 [2023-09-01 00:27:32,349 INFO L136 LiptonReduction]: Total number of compositions: 155 [2023-09-01 00:27:32,351 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:27:32,351 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3c3619d4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:27:32,351 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:27:32,373 INFO L130 PetriNetUnfolder]: 46/227 cut-off events. [2023-09-01 00:27:32,374 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2023-09-01 00:27:32,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:27:32,374 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:27:32,375 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:27:32,375 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:27:32,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1565174249, now seen corresponding path program 1 times [2023-09-01 00:27:32,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:27:32,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948566083] [2023-09-01 00:27:32,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:27:32,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:27:32,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:27:32,421 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:27:32,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:27:32,457 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:27:32,460 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:27:32,460 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:27:32,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 00:27:32,461 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:27:32,461 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:27:32,462 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:27:32,462 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-09-01 00:27:32,488 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2023-09-01 00:27:32,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 271 transitions, 620 flow [2023-09-01 00:27:32,769 INFO L130 PetriNetUnfolder]: 263/1780 cut-off events. [2023-09-01 00:27:32,770 INFO L131 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2023-09-01 00:27:32,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2012 conditions, 1780 events. 263/1780 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 10916 event pairs, 72 based on Foata normal form. 0/1368 useless extension candidates. Maximal degree in co-relation 1127. Up to 192 conditions per place. [2023-09-01 00:27:32,796 INFO L82 GeneralOperation]: Start removeDead. Operand has 237 places, 271 transitions, 620 flow [2023-09-01 00:27:32,812 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 237 places, 271 transitions, 620 flow [2023-09-01 00:27:32,812 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:27:32,812 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 237 places, 271 transitions, 620 flow [2023-09-01 00:27:32,813 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 237 places, 271 transitions, 620 flow [2023-09-01 00:27:32,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 271 transitions, 620 flow [2023-09-01 00:27:33,124 INFO L130 PetriNetUnfolder]: 263/1780 cut-off events. [2023-09-01 00:27:33,126 INFO L131 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2023-09-01 00:27:33,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2012 conditions, 1780 events. 263/1780 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 10916 event pairs, 72 based on Foata normal form. 0/1368 useless extension candidates. Maximal degree in co-relation 1127. Up to 192 conditions per place. [2023-09-01 00:27:33,196 INFO L119 LiptonReduction]: Number of co-enabled transitions 48420 [2023-09-01 00:27:35,765 INFO L134 LiptonReduction]: Checked pairs total: 126696 [2023-09-01 00:27:35,765 INFO L136 LiptonReduction]: Total number of compositions: 174 [2023-09-01 00:27:35,766 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:27:35,767 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3c3619d4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:27:35,767 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:27:35,794 INFO L130 PetriNetUnfolder]: 62/299 cut-off events. [2023-09-01 00:27:35,794 INFO L131 PetriNetUnfolder]: For 79/79 co-relation queries the response was YES. [2023-09-01 00:27:35,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:27:35,795 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:27:35,795 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:27:35,795 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:27:35,796 INFO L85 PathProgramCache]: Analyzing trace with hash -2108014524, now seen corresponding path program 1 times [2023-09-01 00:27:35,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:27:35,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737595565] [2023-09-01 00:27:35,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:27:35,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:27:35,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:27:35,839 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:27:35,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:27:35,866 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:27:35,866 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:27:35,866 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:27:35,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 00:27:35,867 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:27:35,870 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:27:35,870 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:27:35,871 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-09-01 00:27:35,899 INFO L144 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2023-09-01 00:27:35,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 264 places, 303 transitions, 704 flow [2023-09-01 00:27:36,489 INFO L130 PetriNetUnfolder]: 530/3252 cut-off events. [2023-09-01 00:27:36,489 INFO L131 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2023-09-01 00:27:36,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3750 conditions, 3252 events. 530/3252 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 24058 event pairs, 201 based on Foata normal form. 0/2506 useless extension candidates. Maximal degree in co-relation 1998. Up to 448 conditions per place. [2023-09-01 00:27:36,551 INFO L82 GeneralOperation]: Start removeDead. Operand has 264 places, 303 transitions, 704 flow [2023-09-01 00:27:36,609 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 264 places, 303 transitions, 704 flow [2023-09-01 00:27:36,609 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:27:36,609 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 264 places, 303 transitions, 704 flow [2023-09-01 00:27:36,610 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 264 places, 303 transitions, 704 flow [2023-09-01 00:27:36,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 264 places, 303 transitions, 704 flow [2023-09-01 00:27:37,219 INFO L130 PetriNetUnfolder]: 530/3252 cut-off events. [2023-09-01 00:27:37,219 INFO L131 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2023-09-01 00:27:37,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3750 conditions, 3252 events. 530/3252 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 24058 event pairs, 201 based on Foata normal form. 0/2506 useless extension candidates. Maximal degree in co-relation 1998. Up to 448 conditions per place. [2023-09-01 00:27:37,385 INFO L119 LiptonReduction]: Number of co-enabled transitions 63420 [2023-09-01 00:27:40,079 INFO L134 LiptonReduction]: Checked pairs total: 173258 [2023-09-01 00:27:40,079 INFO L136 LiptonReduction]: Total number of compositions: 191 [2023-09-01 00:27:40,081 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:27:40,081 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3c3619d4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:27:40,081 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:27:40,121 INFO L130 PetriNetUnfolder]: 83/401 cut-off events. [2023-09-01 00:27:40,122 INFO L131 PetriNetUnfolder]: For 129/129 co-relation queries the response was YES. [2023-09-01 00:27:40,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:27:40,122 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:27:40,122 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:27:40,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:27:40,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1767414772, now seen corresponding path program 1 times [2023-09-01 00:27:40,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:27:40,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262296604] [2023-09-01 00:27:40,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:27:40,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:27:40,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:27:40,165 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:27:40,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:27:40,181 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:27:40,182 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:27:40,182 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:27:40,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 00:27:40,182 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:27:40,183 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:27:40,183 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:27:40,183 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-09-01 00:27:40,207 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-09-01 00:27:40,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 291 places, 335 transitions, 790 flow [2023-09-01 00:27:41,365 INFO L130 PetriNetUnfolder]: 1117/6196 cut-off events. [2023-09-01 00:27:41,365 INFO L131 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2023-09-01 00:27:41,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7281 conditions, 6196 events. 1117/6196 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 54567 event pairs, 522 based on Foata normal form. 0/4796 useless extension candidates. Maximal degree in co-relation 3734. Up to 1024 conditions per place. [2023-09-01 00:27:41,474 INFO L82 GeneralOperation]: Start removeDead. Operand has 291 places, 335 transitions, 790 flow [2023-09-01 00:27:41,531 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 291 places, 335 transitions, 790 flow [2023-09-01 00:27:41,531 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:27:41,531 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 291 places, 335 transitions, 790 flow [2023-09-01 00:27:41,532 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 291 places, 335 transitions, 790 flow [2023-09-01 00:27:41,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 291 places, 335 transitions, 790 flow [2023-09-01 00:27:42,852 INFO L130 PetriNetUnfolder]: 1117/6196 cut-off events. [2023-09-01 00:27:42,860 INFO L131 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2023-09-01 00:27:42,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7281 conditions, 6196 events. 1117/6196 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 54567 event pairs, 522 based on Foata normal form. 0/4796 useless extension candidates. Maximal degree in co-relation 3734. Up to 1024 conditions per place. [2023-09-01 00:27:43,145 INFO L119 LiptonReduction]: Number of co-enabled transitions 80400 [2023-09-01 00:27:45,953 INFO L134 LiptonReduction]: Checked pairs total: 245799 [2023-09-01 00:27:45,953 INFO L136 LiptonReduction]: Total number of compositions: 208 [2023-09-01 00:27:45,954 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:27:45,955 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3c3619d4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:27:45,955 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:27:45,997 INFO L130 PetriNetUnfolder]: 113/534 cut-off events. [2023-09-01 00:27:45,997 INFO L131 PetriNetUnfolder]: For 202/202 co-relation queries the response was YES. [2023-09-01 00:27:45,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:27:45,998 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:27:45,998 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:27:45,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:27:45,999 INFO L85 PathProgramCache]: Analyzing trace with hash -127511684, now seen corresponding path program 1 times [2023-09-01 00:27:45,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:27:45,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804990211] [2023-09-01 00:27:45,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:27:45,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:27:46,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:27:46,020 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:27:46,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:27:46,039 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:27:46,039 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:27:46,039 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:27:46,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 00:27:46,040 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:27:46,040 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:27:46,040 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:27:46,040 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-09-01 00:27:46,068 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-09-01 00:27:46,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 318 places, 367 transitions, 878 flow [2023-09-01 00:27:48,169 INFO L130 PetriNetUnfolder]: 2408/12148 cut-off events. [2023-09-01 00:27:48,169 INFO L131 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2023-09-01 00:27:48,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14525 conditions, 12148 events. 2408/12148 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 124130 event pairs, 1291 based on Foata normal form. 0/9454 useless extension candidates. Maximal degree in co-relation 7263. Up to 2304 conditions per place. [2023-09-01 00:27:48,330 INFO L82 GeneralOperation]: Start removeDead. Operand has 318 places, 367 transitions, 878 flow [2023-09-01 00:27:48,415 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 318 places, 367 transitions, 878 flow [2023-09-01 00:27:48,415 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:27:48,416 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 318 places, 367 transitions, 878 flow [2023-09-01 00:27:48,416 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 318 places, 367 transitions, 878 flow [2023-09-01 00:27:48,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 318 places, 367 transitions, 878 flow [2023-09-01 00:27:50,467 INFO L130 PetriNetUnfolder]: 2408/12148 cut-off events. [2023-09-01 00:27:50,467 INFO L131 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2023-09-01 00:27:50,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14525 conditions, 12148 events. 2408/12148 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 124130 event pairs, 1291 based on Foata normal form. 0/9454 useless extension candidates. Maximal degree in co-relation 7263. Up to 2304 conditions per place. [2023-09-01 00:27:51,227 INFO L119 LiptonReduction]: Number of co-enabled transitions 99360 [2023-09-01 00:27:54,271 INFO L134 LiptonReduction]: Checked pairs total: 273858 [2023-09-01 00:27:54,271 INFO L136 LiptonReduction]: Total number of compositions: 225 [2023-09-01 00:27:54,273 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:27:54,275 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3c3619d4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:27:54,275 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:27:54,328 INFO L130 PetriNetUnfolder]: 159/731 cut-off events. [2023-09-01 00:27:54,328 INFO L131 PetriNetUnfolder]: For 309/309 co-relation queries the response was YES. [2023-09-01 00:27:54,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:27:54,328 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:27:54,328 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:27:54,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:27:54,329 INFO L85 PathProgramCache]: Analyzing trace with hash 100261241, now seen corresponding path program 1 times [2023-09-01 00:27:54,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:27:54,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660747688] [2023-09-01 00:27:54,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:27:54,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:27:54,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:27:54,348 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:27:54,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:27:54,366 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:27:54,366 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:27:54,366 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:27:54,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 00:27:54,367 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:27:54,367 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:27:54,367 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:27:54,368 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-09-01 00:27:54,394 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2023-09-01 00:27:54,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 345 places, 399 transitions, 968 flow [2023-09-01 00:27:59,158 INFO L130 PetriNetUnfolder]: 5235/24244 cut-off events. [2023-09-01 00:27:59,158 INFO L131 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2023-09-01 00:27:59,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29450 conditions, 24244 events. 5235/24244 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 277922 event pairs, 3084 based on Foata normal form. 0/18976 useless extension candidates. Maximal degree in co-relation 14505. Up to 5120 conditions per place. [2023-09-01 00:27:59,698 INFO L82 GeneralOperation]: Start removeDead. Operand has 345 places, 399 transitions, 968 flow [2023-09-01 00:27:59,881 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 345 places, 399 transitions, 968 flow [2023-09-01 00:27:59,881 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:27:59,882 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 345 places, 399 transitions, 968 flow [2023-09-01 00:27:59,882 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 345 places, 399 transitions, 968 flow [2023-09-01 00:27:59,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 345 places, 399 transitions, 968 flow [2023-09-01 00:28:04,544 INFO L130 PetriNetUnfolder]: 5235/24244 cut-off events. [2023-09-01 00:28:04,544 INFO L131 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2023-09-01 00:28:04,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29450 conditions, 24244 events. 5235/24244 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 277922 event pairs, 3084 based on Foata normal form. 0/18976 useless extension candidates. Maximal degree in co-relation 14505. Up to 5120 conditions per place. [2023-09-01 00:28:05,955 INFO L119 LiptonReduction]: Number of co-enabled transitions 120300 [2023-09-01 00:28:08,862 INFO L134 LiptonReduction]: Checked pairs total: 339473 [2023-09-01 00:28:08,862 INFO L136 LiptonReduction]: Total number of compositions: 240 [2023-09-01 00:28:08,863 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:28:08,864 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3c3619d4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:28:08,864 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:28:08,977 INFO L130 PetriNetUnfolder]: 234/1030 cut-off events. [2023-09-01 00:28:08,977 INFO L131 PetriNetUnfolder]: For 469/469 co-relation queries the response was YES. [2023-09-01 00:28:08,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:28:08,978 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:28:08,978 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:28:08,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:28:08,978 INFO L85 PathProgramCache]: Analyzing trace with hash 778859605, now seen corresponding path program 1 times [2023-09-01 00:28:08,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:28:08,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695244795] [2023-09-01 00:28:08,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:28:08,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:28:09,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:28:09,000 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:28:09,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:28:09,019 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:28:09,020 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:28:09,020 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:28:09,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 00:28:09,020 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:28:09,021 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:28:09,021 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:28:09,021 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-09-01 00:28:09,051 INFO L144 ThreadInstanceAdder]: Constructed 11 joinOtherThreadTransitions. [2023-09-01 00:28:09,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 372 places, 431 transitions, 1060 flow [2023-09-01 00:28:19,570 INFO L130 PetriNetUnfolder]: 11390/48884 cut-off events. [2023-09-01 00:28:19,571 INFO L131 PetriNetUnfolder]: For 11539/11539 co-relation queries the response was YES. [2023-09-01 00:28:20,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60248 conditions, 48884 events. 11390/48884 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 1135. Compared 622890 event pairs, 7181 based on Foata normal form. 0/38482 useless extension candidates. Maximal degree in co-relation 29428. Up to 11264 conditions per place. [2023-09-01 00:28:20,694 INFO L82 GeneralOperation]: Start removeDead. Operand has 372 places, 431 transitions, 1060 flow [2023-09-01 00:28:21,437 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 372 places, 431 transitions, 1060 flow [2023-09-01 00:28:21,437 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:28:21,437 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 372 places, 431 transitions, 1060 flow [2023-09-01 00:28:21,437 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 372 places, 431 transitions, 1060 flow [2023-09-01 00:28:21,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 372 places, 431 transitions, 1060 flow [2023-09-01 00:28:31,694 INFO L130 PetriNetUnfolder]: 11390/48884 cut-off events. [2023-09-01 00:28:31,695 INFO L131 PetriNetUnfolder]: For 11539/11539 co-relation queries the response was YES. [2023-09-01 00:28:32,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60248 conditions, 48884 events. 11390/48884 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 1135. Compared 622890 event pairs, 7181 based on Foata normal form. 0/38482 useless extension candidates. Maximal degree in co-relation 29428. Up to 11264 conditions per place. [2023-09-01 00:28:35,339 INFO L119 LiptonReduction]: Number of co-enabled transitions 143220 [2023-09-01 00:28:38,460 INFO L134 LiptonReduction]: Checked pairs total: 406673 [2023-09-01 00:28:38,460 INFO L136 LiptonReduction]: Total number of compositions: 259 [2023-09-01 00:28:38,461 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:28:38,461 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3c3619d4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:28:38,462 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:28:38,600 INFO L130 PetriNetUnfolder]: 360/1480 cut-off events. [2023-09-01 00:28:38,601 INFO L131 PetriNetUnfolder]: For 713/713 co-relation queries the response was YES. [2023-09-01 00:28:38,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:28:38,601 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:28:38,601 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:28:38,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:28:38,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1160238273, now seen corresponding path program 1 times [2023-09-01 00:28:38,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:28:38,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427998181] [2023-09-01 00:28:38,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:28:38,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:28:38,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:28:38,624 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:28:38,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:28:38,642 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:28:38,643 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:28:38,643 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:28:38,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-09-01 00:28:38,643 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:28:38,644 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:28:38,644 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:28:38,644 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-09-01 00:28:38,678 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2023-09-01 00:28:38,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 399 places, 463 transitions, 1154 flow [2023-09-01 00:29:01,778 INFO L130 PetriNetUnfolder]: 24713/99124 cut-off events. [2023-09-01 00:29:01,779 INFO L131 PetriNetUnfolder]: For 24928/24928 co-relation queries the response was YES. [2023-09-01 00:29:06,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123815 conditions, 99124 events. 24713/99124 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 2202. Compared 1383068 event pairs, 16398 based on Foata normal form. 0/78468 useless extension candidates. Maximal degree in co-relation 60226. Up to 24576 conditions per place. [2023-09-01 00:29:06,082 INFO L82 GeneralOperation]: Start removeDead. Operand has 399 places, 463 transitions, 1154 flow [2023-09-01 00:29:07,189 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 399 places, 463 transitions, 1154 flow [2023-09-01 00:29:07,190 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:29:07,190 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 399 places, 463 transitions, 1154 flow [2023-09-01 00:29:07,190 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 399 places, 463 transitions, 1154 flow [2023-09-01 00:29:07,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 399 places, 463 transitions, 1154 flow [2023-09-01 00:29:30,740 INFO L130 PetriNetUnfolder]: 24713/99124 cut-off events. [2023-09-01 00:29:30,740 INFO L131 PetriNetUnfolder]: For 24928/24928 co-relation queries the response was YES. [2023-09-01 00:29:34,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123815 conditions, 99124 events. 24713/99124 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 2202. Compared 1383068 event pairs, 16398 based on Foata normal form. 0/78468 useless extension candidates. Maximal degree in co-relation 60226. Up to 24576 conditions per place. [2023-09-01 00:29:39,409 INFO L119 LiptonReduction]: Number of co-enabled transitions 168120 [2023-09-01 00:29:42,597 INFO L134 LiptonReduction]: Checked pairs total: 476026 [2023-09-01 00:29:42,597 INFO L136 LiptonReduction]: Total number of compositions: 276 [2023-09-01 00:29:42,599 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:29:42,599 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3c3619d4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:29:42,599 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:29:42,764 INFO L130 PetriNetUnfolder]: 572/2183 cut-off events. [2023-09-01 00:29:42,764 INFO L131 PetriNetUnfolder]: For 1089/1089 co-relation queries the response was YES. [2023-09-01 00:29:42,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:29:42,765 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:29:42,765 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:29:42,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:29:42,765 INFO L85 PathProgramCache]: Analyzing trace with hash -358557089, now seen corresponding path program 1 times [2023-09-01 00:29:42,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:29:42,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334312839] [2023-09-01 00:29:42,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:29:42,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:29:42,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:29:42,788 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:29:42,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:29:42,822 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:29:42,822 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:29:42,822 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:29:42,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 00:29:42,823 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:29:42,823 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:29:42,823 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:29:42,823 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-09-01 00:29:42,854 INFO L144 ThreadInstanceAdder]: Constructed 13 joinOtherThreadTransitions. [2023-09-01 00:29:42,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 426 places, 495 transitions, 1250 flow [2023-09-01 00:30:41,216 INFO L130 PetriNetUnfolder]: 53396/201588 cut-off events. [2023-09-01 00:30:41,228 INFO L131 PetriNetUnfolder]: For 53690/53690 co-relation queries the response was YES. [2023-09-01 00:30:52,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254967 conditions, 201588 events. 53396/201588 cut-off events. For 53690/53690 co-relation queries the response was YES. Maximal size of possible extension queue 4208. Compared 3066756 event pairs, 36879 based on Foata normal form. 0/160438 useless extension candidates. Maximal degree in co-relation 123793. Up to 53248 conditions per place. [2023-09-01 00:30:52,157 INFO L82 GeneralOperation]: Start removeDead. Operand has 426 places, 495 transitions, 1250 flow [2023-09-01 00:30:56,014 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 426 places, 495 transitions, 1250 flow [2023-09-01 00:30:56,014 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:30:56,014 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 426 places, 495 transitions, 1250 flow [2023-09-01 00:30:56,014 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 426 places, 495 transitions, 1250 flow [2023-09-01 00:30:56,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 426 places, 495 transitions, 1250 flow [2023-09-01 00:31:48,407 INFO L130 PetriNetUnfolder]: 53396/201588 cut-off events. [2023-09-01 00:31:48,407 INFO L131 PetriNetUnfolder]: For 53690/53690 co-relation queries the response was YES. [2023-09-01 00:31:59,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254967 conditions, 201588 events. 53396/201588 cut-off events. For 53690/53690 co-relation queries the response was YES. Maximal size of possible extension queue 4208. Compared 3066756 event pairs, 36879 based on Foata normal form. 0/160438 useless extension candidates. Maximal degree in co-relation 123793. Up to 53248 conditions per place. [2023-09-01 00:32:23,896 INFO L119 LiptonReduction]: Number of co-enabled transitions 195000 [2023-09-01 00:32:27,799 INFO L134 LiptonReduction]: Checked pairs total: 557597 [2023-09-01 00:32:27,799 INFO L136 LiptonReduction]: Total number of compositions: 290 [2023-09-01 00:32:27,808 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:32:27,809 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3c3619d4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:32:27,811 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:32:28,194 INFO L130 PetriNetUnfolder]: 926/3266 cut-off events. [2023-09-01 00:32:28,195 INFO L131 PetriNetUnfolder]: For 1672/1672 co-relation queries the response was YES. [2023-09-01 00:32:28,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:32:28,195 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:32:28,201 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:32:28,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:32:28,217 INFO L85 PathProgramCache]: Analyzing trace with hash 536007765, now seen corresponding path program 1 times [2023-09-01 00:32:28,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:32:28,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430229353] [2023-09-01 00:32:28,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:32:28,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:32:28,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:32:28,256 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:32:28,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:32:28,312 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:32:28,312 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:32:28,312 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:32:28,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-09-01 00:32:28,313 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:32:28,313 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:32:28,313 WARN L233 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:32:28,313 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2023-09-01 00:32:28,358 INFO L144 ThreadInstanceAdder]: Constructed 14 joinOtherThreadTransitions. [2023-09-01 00:32:28,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 453 places, 527 transitions, 1348 flow