./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_41-trylock_racefree.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_41-trylock_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-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 ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash af00d5f4cc6a18cb9fd8a5151467217fe3ddb5ee0fa30b2cfbd9dd374105ee15 --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 06:46:45,317 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 06:46:45,319 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 06:46:45,358 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 06:46:45,359 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 06:46:45,362 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 06:46:45,365 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 06:46:45,367 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 06:46:45,370 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 06:46:45,376 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 06:46:45,377 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 06:46:45,380 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 06:46:45,380 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 06:46:45,382 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 06:46:45,384 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 06:46:45,391 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 06:46:45,392 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 06:46:45,393 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 06:46:45,395 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 06:46:45,397 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 06:46:45,401 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 06:46:45,402 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 06:46:45,403 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 06:46:45,403 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 06:46:45,407 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 06:46:45,408 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 06:46:45,408 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 06:46:45,410 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 06:46:45,411 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 06:46:45,412 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 06:46:45,412 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 06:46:45,413 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 06:46:45,415 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 06:46:45,415 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 06:46:45,416 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 06:46:45,416 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 06:46:45,417 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 06:46:45,417 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 06:46:45,417 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 06:46:45,418 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 06:46:45,419 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 06:46:45,420 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-09-01 06:46:45,455 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 06:46:45,455 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 06:46:45,456 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 06:46:45,457 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 06:46:45,457 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 06:46:45,458 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 06:46:45,458 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 06:46:45,458 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 06:46:45,459 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 06:46:45,459 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 06:46:45,460 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 06:46:45,460 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 06:46:45,460 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 06:46:45,460 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 06:46:45,461 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 06:46:45,461 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 06:46:45,461 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 06:46:45,461 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 06:46:45,461 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-09-01 06:46:45,461 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 06:46:45,462 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 06:46:45,462 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 06:46:45,462 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 06:46:45,462 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 06:46:45,462 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 06:46:45,463 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 06:46:45,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 06:46:45,463 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 06:46:45,463 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 06:46:45,463 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 06:46:45,464 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 06:46:45,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 06:46:45,464 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 06:46:45,464 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 06:46:45,464 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 06:46:45,465 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 06:46:45,465 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 06:46:45,465 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> af00d5f4cc6a18cb9fd8a5151467217fe3ddb5ee0fa30b2cfbd9dd374105ee15 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 06:46:45,757 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 06:46:45,789 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 06:46:45,792 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 06:46:45,793 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 06:46:45,793 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 06:46:45,795 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_41-trylock_racefree.i [2023-09-01 06:46:47,053 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 06:46:47,315 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 06:46:47,316 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_41-trylock_racefree.i [2023-09-01 06:46:47,328 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5da56933/50ad0d805cc54f26bd77e5666674626e/FLAG2141fbdca [2023-09-01 06:46:47,340 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5da56933/50ad0d805cc54f26bd77e5666674626e [2023-09-01 06:46:47,342 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 06:46:47,343 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 06:46:47,344 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 06:46:47,344 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 06:46:47,347 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 06:46:47,348 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 06:46:47" (1/1) ... [2023-09-01 06:46:47,349 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@556538b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:46:47, skipping insertion in model container [2023-09-01 06:46:47,349 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 06:46:47" (1/1) ... [2023-09-01 06:46:47,355 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 06:46:47,404 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 06:46:47,686 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_41-trylock_racefree.i[30176,30189] [2023-09-01 06:46:47,711 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 06:46:47,727 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 06:46:47,774 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_41-trylock_racefree.i[30176,30189] [2023-09-01 06:46:47,796 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 06:46:47,836 INFO L208 MainTranslator]: Completed translation [2023-09-01 06:46:47,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:46:47 WrapperNode [2023-09-01 06:46:47,837 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 06:46:47,839 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 06:46:47,839 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 06:46:47,839 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 06:46:47,845 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:46:47" (1/1) ... [2023-09-01 06:46:47,872 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:46:47" (1/1) ... [2023-09-01 06:46:47,900 INFO L138 Inliner]: procedures = 171, calls = 30, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 81 [2023-09-01 06:46:47,901 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 06:46:47,902 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 06:46:47,902 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 06:46:47,902 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 06:46:47,910 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:46:47" (1/1) ... [2023-09-01 06:46:47,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:46:47" (1/1) ... [2023-09-01 06:46:47,924 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:46:47" (1/1) ... [2023-09-01 06:46:47,925 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:46:47" (1/1) ... [2023-09-01 06:46:47,929 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:46:47" (1/1) ... [2023-09-01 06:46:47,940 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:46:47" (1/1) ... [2023-09-01 06:46:47,941 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:46:47" (1/1) ... [2023-09-01 06:46:47,949 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:46:47" (1/1) ... [2023-09-01 06:46:47,951 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 06:46:47,955 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 06:46:47,956 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 06:46:47,956 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 06:46:47,957 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:46:47" (1/1) ... [2023-09-01 06:46:47,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 06:46:47,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 06:46:47,988 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 06:46:48,002 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 06:46:48,030 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 06:46:48,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 06:46:48,031 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 06:46:48,031 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 06:46:48,031 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 06:46:48,031 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-09-01 06:46:48,032 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-09-01 06:46:48,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 06:46:48,032 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexTryLock [2023-09-01 06:46:48,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 06:46:48,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 06:46:48,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 06:46:48,034 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 06:46:48,231 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 06:46:48,233 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 06:46:48,436 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 06:46:48,446 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 06:46:48,447 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-09-01 06:46:48,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 06:46:48 BoogieIcfgContainer [2023-09-01 06:46:48,449 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 06:46:48,451 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 06:46:48,451 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 06:46:48,454 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 06:46:48,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 06:46:47" (1/3) ... [2023-09-01 06:46:48,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39580fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 06:46:48, skipping insertion in model container [2023-09-01 06:46:48,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:46:47" (2/3) ... [2023-09-01 06:46:48,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39580fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 06:46:48, skipping insertion in model container [2023-09-01 06:46:48,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 06:46:48" (3/3) ... [2023-09-01 06:46:48,457 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_41-trylock_racefree.i [2023-09-01 06:46:48,469 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 06:46:48,476 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 06:46:48,476 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-09-01 06:46:48,476 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 06:46:48,528 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-09-01 06:46:48,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 118 transitions, 244 flow [2023-09-01 06:46:48,637 INFO L130 PetriNetUnfolder]: 21/154 cut-off events. [2023-09-01 06:46:48,637 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 06:46:48,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 154 events. 21/154 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 374 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 81. Up to 6 conditions per place. [2023-09-01 06:46:48,646 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 118 transitions, 244 flow [2023-09-01 06:46:48,649 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 109 transitions, 223 flow [2023-09-01 06:46:48,652 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:46:48,659 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 109 transitions, 223 flow [2023-09-01 06:46:48,662 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 109 transitions, 223 flow [2023-09-01 06:46:48,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 109 transitions, 223 flow [2023-09-01 06:46:48,688 INFO L130 PetriNetUnfolder]: 20/145 cut-off events. [2023-09-01 06:46:48,688 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 06:46:48,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 145 events. 20/145 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 360 event pairs, 0 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 81. Up to 6 conditions per place. [2023-09-01 06:46:48,700 INFO L119 LiptonReduction]: Number of co-enabled transitions 3312 [2023-09-01 06:46:51,161 INFO L134 LiptonReduction]: Checked pairs total: 4838 [2023-09-01 06:46:51,161 INFO L136 LiptonReduction]: Total number of compositions: 92 [2023-09-01 06:46:51,173 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:46:51,179 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@729e681e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:46:51,180 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:46:51,186 INFO L130 PetriNetUnfolder]: 5/30 cut-off events. [2023-09-01 06:46:51,186 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 06:46:51,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:46:51,187 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-09-01 06:46:51,188 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:46:51,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:46:51,193 INFO L85 PathProgramCache]: Analyzing trace with hash 566332189, now seen corresponding path program 1 times [2023-09-01 06:46:51,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:46:51,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757117686] [2023-09-01 06:46:51,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:46:51,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:46:51,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:46:51,331 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:46:51,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:46:51,376 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:46:51,378 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:46:51,379 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:46:51,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 06:46:51,381 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 06:46:51,387 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:46:51,388 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:46:51,388 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-09-01 06:46:51,423 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 06:46:51,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 156 transitions, 330 flow [2023-09-01 06:46:51,476 INFO L130 PetriNetUnfolder]: 37/264 cut-off events. [2023-09-01 06:46:51,476 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 06:46:51,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278 conditions, 264 events. 37/264 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 784 event pairs, 0 based on Foata normal form. 0/205 useless extension candidates. Maximal degree in co-relation 156. Up to 9 conditions per place. [2023-09-01 06:46:51,480 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 156 transitions, 330 flow [2023-09-01 06:46:51,481 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 140 places, 156 transitions, 330 flow [2023-09-01 06:46:51,482 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:46:51,482 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 140 places, 156 transitions, 330 flow [2023-09-01 06:46:51,482 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 140 places, 156 transitions, 330 flow [2023-09-01 06:46:51,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 156 transitions, 330 flow [2023-09-01 06:46:51,516 INFO L130 PetriNetUnfolder]: 37/264 cut-off events. [2023-09-01 06:46:51,517 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 06:46:51,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278 conditions, 264 events. 37/264 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 784 event pairs, 0 based on Foata normal form. 0/205 useless extension candidates. Maximal degree in co-relation 156. Up to 9 conditions per place. [2023-09-01 06:46:51,525 INFO L119 LiptonReduction]: Number of co-enabled transitions 10584 [2023-09-01 06:46:53,859 INFO L134 LiptonReduction]: Checked pairs total: 25192 [2023-09-01 06:46:53,859 INFO L136 LiptonReduction]: Total number of compositions: 119 [2023-09-01 06:46:53,861 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:46:53,862 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@729e681e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:46:53,863 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:46:53,868 INFO L130 PetriNetUnfolder]: 13/65 cut-off events. [2023-09-01 06:46:53,869 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 06:46:53,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:46:53,869 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-09-01 06:46:53,869 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:46:53,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:46:53,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1142571554, now seen corresponding path program 1 times [2023-09-01 06:46:53,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:46:53,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82804072] [2023-09-01 06:46:53,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:46:53,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:46:53,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:46:53,895 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:46:53,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:46:53,917 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:46:53,917 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:46:53,918 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:46:53,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 06:46:53,918 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 06:46:53,919 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:46:53,919 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:46:53,919 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-09-01 06:46:53,946 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 06:46:53,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 194 transitions, 418 flow [2023-09-01 06:46:53,991 INFO L130 PetriNetUnfolder]: 58/413 cut-off events. [2023-09-01 06:46:53,992 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-09-01 06:46:53,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 441 conditions, 413 events. 58/413 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1385 event pairs, 1 based on Foata normal form. 0/319 useless extension candidates. Maximal degree in co-relation 272. Up to 16 conditions per place. [2023-09-01 06:46:53,997 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 194 transitions, 418 flow [2023-09-01 06:46:54,000 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 173 places, 194 transitions, 418 flow [2023-09-01 06:46:54,000 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:46:54,001 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 173 places, 194 transitions, 418 flow [2023-09-01 06:46:54,001 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 173 places, 194 transitions, 418 flow [2023-09-01 06:46:54,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 194 transitions, 418 flow [2023-09-01 06:46:54,041 INFO L130 PetriNetUnfolder]: 58/413 cut-off events. [2023-09-01 06:46:54,042 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-09-01 06:46:54,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 441 conditions, 413 events. 58/413 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1385 event pairs, 1 based on Foata normal form. 0/319 useless extension candidates. Maximal degree in co-relation 272. Up to 16 conditions per place. [2023-09-01 06:46:54,062 INFO L119 LiptonReduction]: Number of co-enabled transitions 20088 [2023-09-01 06:46:56,405 INFO L134 LiptonReduction]: Checked pairs total: 50460 [2023-09-01 06:46:56,405 INFO L136 LiptonReduction]: Total number of compositions: 143 [2023-09-01 06:46:56,407 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:46:56,408 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@729e681e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:46:56,408 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:46:56,416 INFO L130 PetriNetUnfolder]: 26/114 cut-off events. [2023-09-01 06:46:56,417 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-09-01 06:46:56,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:46:56,417 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-09-01 06:46:56,417 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:46:56,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:46:56,418 INFO L85 PathProgramCache]: Analyzing trace with hash 2113417511, now seen corresponding path program 1 times [2023-09-01 06:46:56,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:46:56,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416844896] [2023-09-01 06:46:56,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:46:56,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:46:56,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:46:56,442 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:46:56,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:46:56,464 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:46:56,464 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:46:56,464 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:46:56,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 06:46:56,465 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 06:46:56,465 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:46:56,466 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:46:56,466 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-09-01 06:46:56,485 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-09-01 06:46:56,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 206 places, 232 transitions, 508 flow [2023-09-01 06:46:56,561 INFO L130 PetriNetUnfolder]: 91/642 cut-off events. [2023-09-01 06:46:56,562 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-09-01 06:46:56,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 697 conditions, 642 events. 91/642 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2485 event pairs, 6 based on Foata normal form. 0/497 useless extension candidates. Maximal degree in co-relation 433. Up to 32 conditions per place. [2023-09-01 06:46:56,579 INFO L82 GeneralOperation]: Start removeDead. Operand has 206 places, 232 transitions, 508 flow [2023-09-01 06:46:56,584 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 206 places, 232 transitions, 508 flow [2023-09-01 06:46:56,584 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:46:56,584 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 206 places, 232 transitions, 508 flow [2023-09-01 06:46:56,584 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 206 places, 232 transitions, 508 flow [2023-09-01 06:46:56,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 206 places, 232 transitions, 508 flow [2023-09-01 06:46:56,668 INFO L130 PetriNetUnfolder]: 91/642 cut-off events. [2023-09-01 06:46:56,669 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-09-01 06:46:56,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 697 conditions, 642 events. 91/642 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2485 event pairs, 6 based on Foata normal form. 0/497 useless extension candidates. Maximal degree in co-relation 433. Up to 32 conditions per place. [2023-09-01 06:46:56,697 INFO L119 LiptonReduction]: Number of co-enabled transitions 32400 [2023-09-01 06:46:59,236 INFO L134 LiptonReduction]: Checked pairs total: 87502 [2023-09-01 06:46:59,237 INFO L136 LiptonReduction]: Total number of compositions: 168 [2023-09-01 06:46:59,238 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:46:59,239 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@729e681e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:46:59,239 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:46:59,252 INFO L130 PetriNetUnfolder]: 34/159 cut-off events. [2023-09-01 06:46:59,252 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-09-01 06:46:59,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:46:59,253 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-09-01 06:46:59,254 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:46:59,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:46:59,255 INFO L85 PathProgramCache]: Analyzing trace with hash -2081710992, now seen corresponding path program 1 times [2023-09-01 06:46:59,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:46:59,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102189051] [2023-09-01 06:46:59,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:46:59,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:46:59,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:46:59,301 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:46:59,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:46:59,340 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:46:59,342 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:46:59,343 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:46:59,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 06:46:59,343 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 06:46:59,344 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:46:59,344 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:46:59,344 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-09-01 06:46:59,376 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-09-01 06:46:59,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 239 places, 270 transitions, 600 flow [2023-09-01 06:46:59,522 INFO L130 PetriNetUnfolder]: 152/1035 cut-off events. [2023-09-01 06:46:59,523 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-09-01 06:46:59,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1146 conditions, 1035 events. 152/1035 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 4785 event pairs, 23 based on Foata normal form. 0/807 useless extension candidates. Maximal degree in co-relation 687. Up to 80 conditions per place. [2023-09-01 06:46:59,536 INFO L82 GeneralOperation]: Start removeDead. Operand has 239 places, 270 transitions, 600 flow [2023-09-01 06:46:59,546 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 239 places, 270 transitions, 600 flow [2023-09-01 06:46:59,546 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:46:59,546 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 239 places, 270 transitions, 600 flow [2023-09-01 06:46:59,547 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 239 places, 270 transitions, 600 flow [2023-09-01 06:46:59,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 239 places, 270 transitions, 600 flow [2023-09-01 06:46:59,684 INFO L130 PetriNetUnfolder]: 152/1035 cut-off events. [2023-09-01 06:46:59,684 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-09-01 06:46:59,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1146 conditions, 1035 events. 152/1035 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 4785 event pairs, 23 based on Foata normal form. 0/807 useless extension candidates. Maximal degree in co-relation 687. Up to 80 conditions per place. [2023-09-01 06:46:59,732 INFO L119 LiptonReduction]: Number of co-enabled transitions 47520 [2023-09-01 06:47:02,386 INFO L134 LiptonReduction]: Checked pairs total: 134747 [2023-09-01 06:47:02,387 INFO L136 LiptonReduction]: Total number of compositions: 190 [2023-09-01 06:47:02,388 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:47:02,389 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@729e681e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:47:02,389 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:47:02,405 INFO L130 PetriNetUnfolder]: 47/219 cut-off events. [2023-09-01 06:47:02,405 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2023-09-01 06:47:02,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:47:02,405 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 06:47:02,406 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:47:02,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:47:02,406 INFO L85 PathProgramCache]: Analyzing trace with hash -101798680, now seen corresponding path program 1 times [2023-09-01 06:47:02,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:47:02,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814881377] [2023-09-01 06:47:02,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:47:02,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:47:02,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:47:02,428 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:47:02,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:47:02,446 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:47:02,447 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:47:02,447 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:47:02,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 06:47:02,447 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 06:47:02,448 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:47:02,448 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:47:02,448 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-09-01 06:47:02,488 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2023-09-01 06:47:02,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 272 places, 308 transitions, 694 flow [2023-09-01 06:47:02,805 INFO L130 PetriNetUnfolder]: 277/1764 cut-off events. [2023-09-01 06:47:02,806 INFO L131 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2023-09-01 06:47:02,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1996 conditions, 1764 events. 277/1764 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 10105 event pairs, 72 based on Foata normal form. 0/1389 useless extension candidates. Maximal degree in co-relation 1134. Up to 192 conditions per place. [2023-09-01 06:47:02,828 INFO L82 GeneralOperation]: Start removeDead. Operand has 272 places, 308 transitions, 694 flow [2023-09-01 06:47:02,848 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 272 places, 308 transitions, 694 flow [2023-09-01 06:47:02,849 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:47:02,849 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 272 places, 308 transitions, 694 flow [2023-09-01 06:47:02,849 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 272 places, 308 transitions, 694 flow [2023-09-01 06:47:02,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 272 places, 308 transitions, 694 flow [2023-09-01 06:47:03,161 INFO L130 PetriNetUnfolder]: 277/1764 cut-off events. [2023-09-01 06:47:03,162 INFO L131 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2023-09-01 06:47:03,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1996 conditions, 1764 events. 277/1764 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 10105 event pairs, 72 based on Foata normal form. 0/1389 useless extension candidates. Maximal degree in co-relation 1134. Up to 192 conditions per place. [2023-09-01 06:47:03,244 INFO L119 LiptonReduction]: Number of co-enabled transitions 65448 [2023-09-01 06:47:06,229 INFO L134 LiptonReduction]: Checked pairs total: 187325 [2023-09-01 06:47:06,229 INFO L136 LiptonReduction]: Total number of compositions: 218 [2023-09-01 06:47:06,230 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:47:06,231 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@729e681e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:47:06,231 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:47:06,251 INFO L130 PetriNetUnfolder]: 63/291 cut-off events. [2023-09-01 06:47:06,252 INFO L131 PetriNetUnfolder]: For 79/79 co-relation queries the response was YES. [2023-09-01 06:47:06,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:47:06,252 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 06:47:06,252 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:47:06,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:47:06,253 INFO L85 PathProgramCache]: Analyzing trace with hash -226341221, now seen corresponding path program 1 times [2023-09-01 06:47:06,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:47:06,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130134244] [2023-09-01 06:47:06,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:47:06,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:47:06,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:47:06,301 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:47:06,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:47:06,338 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:47:06,338 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:47:06,338 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:47:06,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 06:47:06,339 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 06:47:06,339 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:47:06,339 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:47:06,340 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-09-01 06:47:06,372 INFO L144 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2023-09-01 06:47:06,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 305 places, 346 transitions, 790 flow [2023-09-01 06:47:06,972 INFO L130 PetriNetUnfolder]: 546/3181 cut-off events. [2023-09-01 06:47:06,972 INFO L131 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2023-09-01 06:47:07,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3679 conditions, 3181 events. 546/3181 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 22158 event pairs, 201 based on Foata normal form. 0/2531 useless extension candidates. Maximal degree in co-relation 1982. Up to 448 conditions per place. [2023-09-01 06:47:07,003 INFO L82 GeneralOperation]: Start removeDead. Operand has 305 places, 346 transitions, 790 flow [2023-09-01 06:47:07,029 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 305 places, 346 transitions, 790 flow [2023-09-01 06:47:07,030 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:47:07,030 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 305 places, 346 transitions, 790 flow [2023-09-01 06:47:07,030 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 305 places, 346 transitions, 790 flow [2023-09-01 06:47:07,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 305 places, 346 transitions, 790 flow [2023-09-01 06:47:07,656 INFO L130 PetriNetUnfolder]: 546/3181 cut-off events. [2023-09-01 06:47:07,656 INFO L131 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2023-09-01 06:47:07,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3679 conditions, 3181 events. 546/3181 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 22158 event pairs, 201 based on Foata normal form. 0/2531 useless extension candidates. Maximal degree in co-relation 1982. Up to 448 conditions per place. [2023-09-01 06:47:07,916 INFO L119 LiptonReduction]: Number of co-enabled transitions 86184 [2023-09-01 06:47:11,041 INFO L134 LiptonReduction]: Checked pairs total: 287294 [2023-09-01 06:47:11,041 INFO L136 LiptonReduction]: Total number of compositions: 238 [2023-09-01 06:47:11,049 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:47:11,051 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@729e681e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:47:11,051 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:47:11,095 INFO L130 PetriNetUnfolder]: 91/398 cut-off events. [2023-09-01 06:47:11,096 INFO L131 PetriNetUnfolder]: For 129/129 co-relation queries the response was YES. [2023-09-01 06:47:11,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:47:11,096 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 06:47:11,096 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:47:11,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:47:11,097 INFO L85 PathProgramCache]: Analyzing trace with hash -239548243, now seen corresponding path program 1 times [2023-09-01 06:47:11,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:47:11,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145707020] [2023-09-01 06:47:11,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:47:11,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:47:11,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:47:11,128 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:47:11,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:47:11,150 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:47:11,150 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:47:11,150 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:47:11,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 06:47:11,151 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 06:47:11,151 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:47:11,151 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:47:11,152 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-09-01 06:47:11,185 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-09-01 06:47:11,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 338 places, 384 transitions, 888 flow [2023-09-01 06:47:12,407 INFO L130 PetriNetUnfolder]: 1135/6006 cut-off events. [2023-09-01 06:47:12,408 INFO L131 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2023-09-01 06:47:12,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7091 conditions, 6006 events. 1135/6006 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 49679 event pairs, 522 based on Foata normal form. 0/4825 useless extension candidates. Maximal degree in co-relation 3663. Up to 1024 conditions per place. [2023-09-01 06:47:12,469 INFO L82 GeneralOperation]: Start removeDead. Operand has 338 places, 384 transitions, 888 flow [2023-09-01 06:47:12,519 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 338 places, 384 transitions, 888 flow [2023-09-01 06:47:12,520 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:47:12,520 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 338 places, 384 transitions, 888 flow [2023-09-01 06:47:12,520 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 338 places, 384 transitions, 888 flow [2023-09-01 06:47:12,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 338 places, 384 transitions, 888 flow [2023-09-01 06:47:13,725 INFO L130 PetriNetUnfolder]: 1135/6006 cut-off events. [2023-09-01 06:47:13,726 INFO L131 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2023-09-01 06:47:13,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7091 conditions, 6006 events. 1135/6006 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 49679 event pairs, 522 based on Foata normal form. 0/4825 useless extension candidates. Maximal degree in co-relation 3663. Up to 1024 conditions per place. [2023-09-01 06:47:14,009 INFO L119 LiptonReduction]: Number of co-enabled transitions 109728 [2023-09-01 06:47:17,334 INFO L134 LiptonReduction]: Checked pairs total: 327017 [2023-09-01 06:47:17,335 INFO L136 LiptonReduction]: Total number of compositions: 265 [2023-09-01 06:47:17,337 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:47:17,339 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@729e681e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:47:17,339 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:47:17,378 INFO L130 PetriNetUnfolder]: 114/509 cut-off events. [2023-09-01 06:47:17,379 INFO L131 PetriNetUnfolder]: For 202/202 co-relation queries the response was YES. [2023-09-01 06:47:17,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:47:17,379 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 06:47:17,379 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:47:17,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:47:17,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1530420182, now seen corresponding path program 1 times [2023-09-01 06:47:17,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:47:17,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901339128] [2023-09-01 06:47:17,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:47:17,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:47:17,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:47:17,401 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:47:17,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:47:17,419 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:47:17,419 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:47:17,420 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:47:17,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 06:47:17,420 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 06:47:17,420 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:47:17,421 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:47:17,421 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-09-01 06:47:17,449 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-09-01 06:47:17,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 371 places, 422 transitions, 988 flow [2023-09-01 06:47:19,967 INFO L130 PetriNetUnfolder]: 2428/11711 cut-off events. [2023-09-01 06:47:19,967 INFO L131 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2023-09-01 06:47:20,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14088 conditions, 11711 events. 2428/11711 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 114355 event pairs, 1291 based on Foata normal form. 0/9487 useless extension candidates. Maximal degree in co-relation 7074. Up to 2304 conditions per place. [2023-09-01 06:47:20,097 INFO L82 GeneralOperation]: Start removeDead. Operand has 371 places, 422 transitions, 988 flow [2023-09-01 06:47:20,189 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 371 places, 422 transitions, 988 flow [2023-09-01 06:47:20,189 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:47:20,189 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 371 places, 422 transitions, 988 flow [2023-09-01 06:47:20,190 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 371 places, 422 transitions, 988 flow [2023-09-01 06:47:20,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 371 places, 422 transitions, 988 flow [2023-09-01 06:47:22,629 INFO L130 PetriNetUnfolder]: 2428/11711 cut-off events. [2023-09-01 06:47:22,629 INFO L131 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2023-09-01 06:47:22,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14088 conditions, 11711 events. 2428/11711 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 114355 event pairs, 1291 based on Foata normal form. 0/9487 useless extension candidates. Maximal degree in co-relation 7074. Up to 2304 conditions per place. [2023-09-01 06:47:23,342 INFO L119 LiptonReduction]: Number of co-enabled transitions 136080 [2023-09-01 06:47:27,002 INFO L134 LiptonReduction]: Checked pairs total: 462866 [2023-09-01 06:47:27,002 INFO L136 LiptonReduction]: Total number of compositions: 296 [2023-09-01 06:47:27,004 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:47:27,005 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@729e681e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:47:27,005 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:47:27,075 INFO L130 PetriNetUnfolder]: 160/687 cut-off events. [2023-09-01 06:47:27,075 INFO L131 PetriNetUnfolder]: For 309/309 co-relation queries the response was YES. [2023-09-01 06:47:27,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:47:27,076 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 06:47:27,076 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:47:27,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:47:27,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1729037204, now seen corresponding path program 1 times [2023-09-01 06:47:27,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:47:27,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557617845] [2023-09-01 06:47:27,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:47:27,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:47:27,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:47:27,098 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:47:27,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:47:27,117 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:47:27,118 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:47:27,118 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:47:27,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 06:47:27,118 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 06:47:27,119 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:47:27,119 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:47:27,119 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-09-01 06:47:27,158 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2023-09-01 06:47:27,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 404 places, 460 transitions, 1090 flow [2023-09-01 06:47:32,767 INFO L130 PetriNetUnfolder]: 5257/23304 cut-off events. [2023-09-01 06:47:32,767 INFO L131 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2023-09-01 06:47:33,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28510 conditions, 23304 events. 5257/23304 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 255712 event pairs, 3084 based on Foata normal form. 0/19013 useless extension candidates. Maximal degree in co-relation 14071. Up to 5120 conditions per place. [2023-09-01 06:47:33,120 INFO L82 GeneralOperation]: Start removeDead. Operand has 404 places, 460 transitions, 1090 flow [2023-09-01 06:47:33,339 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 404 places, 460 transitions, 1090 flow [2023-09-01 06:47:33,339 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:47:33,339 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 404 places, 460 transitions, 1090 flow [2023-09-01 06:47:33,339 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 404 places, 460 transitions, 1090 flow [2023-09-01 06:47:33,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 404 places, 460 transitions, 1090 flow [2023-09-01 06:47:38,996 INFO L130 PetriNetUnfolder]: 5257/23304 cut-off events. [2023-09-01 06:47:38,996 INFO L131 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2023-09-01 06:47:39,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28510 conditions, 23304 events. 5257/23304 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 255712 event pairs, 3084 based on Foata normal form. 0/19013 useless extension candidates. Maximal degree in co-relation 14071. Up to 5120 conditions per place. [2023-09-01 06:47:40,464 INFO L119 LiptonReduction]: Number of co-enabled transitions 165240 [2023-09-01 06:47:44,373 INFO L134 LiptonReduction]: Checked pairs total: 512512 [2023-09-01 06:47:44,373 INFO L136 LiptonReduction]: Total number of compositions: 312 [2023-09-01 06:47:44,375 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:47:44,376 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@729e681e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:47:44,376 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:47:44,485 INFO L130 PetriNetUnfolder]: 245/972 cut-off events. [2023-09-01 06:47:44,486 INFO L131 PetriNetUnfolder]: For 469/469 co-relation queries the response was YES. [2023-09-01 06:47:44,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:47:44,486 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 06:47:44,486 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:47:44,486 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:47:44,486 INFO L85 PathProgramCache]: Analyzing trace with hash 692893308, now seen corresponding path program 1 times [2023-09-01 06:47:44,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:47:44,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445642112] [2023-09-01 06:47:44,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:47:44,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:47:44,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:47:44,509 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:47:44,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:47:44,530 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:47:44,530 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:47:44,531 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:47:44,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 06:47:44,531 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 06:47:44,531 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:47:44,532 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:47:44,532 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-09-01 06:47:44,567 INFO L144 ThreadInstanceAdder]: Constructed 11 joinOtherThreadTransitions. [2023-09-01 06:47:44,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 437 places, 498 transitions, 1194 flow [2023-09-01 06:47:57,173 INFO L130 PetriNetUnfolder]: 11414/46929 cut-off events. [2023-09-01 06:47:57,173 INFO L131 PetriNetUnfolder]: For 11539/11539 co-relation queries the response was YES. [2023-09-01 06:47:58,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58293 conditions, 46929 events. 11414/46929 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 771. Compared 576400 event pairs, 7181 based on Foata normal form. 0/38523 useless extension candidates. Maximal degree in co-relation 28493. Up to 11264 conditions per place. [2023-09-01 06:47:58,546 INFO L82 GeneralOperation]: Start removeDead. Operand has 437 places, 498 transitions, 1194 flow [2023-09-01 06:47:59,375 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 437 places, 498 transitions, 1194 flow [2023-09-01 06:47:59,375 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:47:59,375 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 437 places, 498 transitions, 1194 flow [2023-09-01 06:47:59,375 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 437 places, 498 transitions, 1194 flow [2023-09-01 06:47:59,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 437 places, 498 transitions, 1194 flow [2023-09-01 06:48:11,993 INFO L130 PetriNetUnfolder]: 11414/46929 cut-off events. [2023-09-01 06:48:11,993 INFO L131 PetriNetUnfolder]: For 11539/11539 co-relation queries the response was YES. [2023-09-01 06:48:13,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58293 conditions, 46929 events. 11414/46929 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 771. Compared 576400 event pairs, 7181 based on Foata normal form. 0/38523 useless extension candidates. Maximal degree in co-relation 28493. Up to 11264 conditions per place. [2023-09-01 06:48:16,093 INFO L119 LiptonReduction]: Number of co-enabled transitions 197208 [2023-09-01 06:48:20,000 INFO L134 LiptonReduction]: Checked pairs total: 531893 [2023-09-01 06:48:20,000 INFO L136 LiptonReduction]: Total number of compositions: 341 [2023-09-01 06:48:20,001 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:48:20,001 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@729e681e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:48:20,001 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:48:20,123 INFO L130 PetriNetUnfolder]: 361/1356 cut-off events. [2023-09-01 06:48:20,124 INFO L131 PetriNetUnfolder]: For 713/713 co-relation queries the response was YES. [2023-09-01 06:48:20,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:48:20,124 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 06:48:20,124 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:48:20,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:48:20,125 INFO L85 PathProgramCache]: Analyzing trace with hash 2143899484, now seen corresponding path program 1 times [2023-09-01 06:48:20,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:48:20,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816008726] [2023-09-01 06:48:20,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:48:20,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:48:20,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:48:20,147 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:48:20,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:48:20,168 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:48:20,169 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:48:20,169 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:48:20,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-09-01 06:48:20,169 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 06:48:20,170 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:48:20,170 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:48:20,170 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-09-01 06:48:20,202 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2023-09-01 06:48:20,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 470 places, 536 transitions, 1300 flow [2023-09-01 06:48:48,944 INFO L130 PetriNetUnfolder]: 24739/95130 cut-off events. [2023-09-01 06:48:48,944 INFO L131 PetriNetUnfolder]: For 24928/24928 co-relation queries the response was YES. [2023-09-01 06:48:55,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119821 conditions, 95130 events. 24739/95130 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 1473. Compared 1277805 event pairs, 16398 based on Foata normal form. 0/78513 useless extension candidates. Maximal degree in co-relation 58276. Up to 24576 conditions per place. [2023-09-01 06:48:55,126 INFO L82 GeneralOperation]: Start removeDead. Operand has 470 places, 536 transitions, 1300 flow [2023-09-01 06:48:57,677 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 470 places, 536 transitions, 1300 flow [2023-09-01 06:48:57,677 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:48:57,677 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 470 places, 536 transitions, 1300 flow [2023-09-01 06:48:57,677 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 470 places, 536 transitions, 1300 flow [2023-09-01 06:48:57,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 470 places, 536 transitions, 1300 flow [2023-09-01 06:49:25,663 INFO L130 PetriNetUnfolder]: 24739/95130 cut-off events. [2023-09-01 06:49:25,663 INFO L131 PetriNetUnfolder]: For 24928/24928 co-relation queries the response was YES. [2023-09-01 06:49:30,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119821 conditions, 95130 events. 24739/95130 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 1473. Compared 1277805 event pairs, 16398 based on Foata normal form. 0/78513 useless extension candidates. Maximal degree in co-relation 58276. Up to 24576 conditions per place. [2023-09-01 06:49:42,120 INFO L119 LiptonReduction]: Number of co-enabled transitions 231984 [2023-09-01 06:49:46,294 INFO L134 LiptonReduction]: Checked pairs total: 725209 [2023-09-01 06:49:46,294 INFO L136 LiptonReduction]: Total number of compositions: 366 [2023-09-01 06:49:46,296 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:49:46,296 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@729e681e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:49:46,296 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:49:46,501 INFO L130 PetriNetUnfolder]: 573/1980 cut-off events. [2023-09-01 06:49:46,501 INFO L131 PetriNetUnfolder]: For 1089/1089 co-relation queries the response was YES. [2023-09-01 06:49:46,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:49:46,501 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 06:49:46,501 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:49:46,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:49:46,502 INFO L85 PathProgramCache]: Analyzing trace with hash -161244286, now seen corresponding path program 1 times [2023-09-01 06:49:46,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:49:46,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023015003] [2023-09-01 06:49:46,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:49:46,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:49:46,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:49:46,542 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:49:46,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:49:46,579 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:49:46,579 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:49:46,579 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:49:46,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 06:49:46,580 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 06:49:46,583 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:49:46,583 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:49:46,583 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-09-01 06:49:46,619 INFO L144 ThreadInstanceAdder]: Constructed 13 joinOtherThreadTransitions. [2023-09-01 06:49:46,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 503 places, 574 transitions, 1408 flow [2023-09-01 06:50:52,759 INFO L130 PetriNetUnfolder]: 53424/193507 cut-off events. [2023-09-01 06:50:52,760 INFO L131 PetriNetUnfolder]: For 53690/53690 co-relation queries the response was YES. [2023-09-01 06:51:02,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246886 conditions, 193507 events. 53424/193507 cut-off events. For 53690/53690 co-relation queries the response was YES. Maximal size of possible extension queue 2894. Compared 2837471 event pairs, 36879 based on Foata normal form. 0/160487 useless extension candidates. Maximal degree in co-relation 119804. Up to 53248 conditions per place. [2023-09-01 06:51:02,565 INFO L82 GeneralOperation]: Start removeDead. Operand has 503 places, 574 transitions, 1408 flow [2023-09-01 06:51:07,391 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 503 places, 574 transitions, 1408 flow [2023-09-01 06:51:07,391 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:51:07,392 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 503 places, 574 transitions, 1408 flow [2023-09-01 06:51:07,392 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 503 places, 574 transitions, 1408 flow [2023-09-01 06:51:07,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 503 places, 574 transitions, 1408 flow [2023-09-01 06:52:12,883 INFO L130 PetriNetUnfolder]: 53424/193507 cut-off events. [2023-09-01 06:52:12,884 INFO L131 PetriNetUnfolder]: For 53690/53690 co-relation queries the response was YES. [2023-09-01 06:52:22,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246886 conditions, 193507 events. 53424/193507 cut-off events. For 53690/53690 co-relation queries the response was YES. Maximal size of possible extension queue 2894. Compared 2837471 event pairs, 36879 based on Foata normal form. 0/160487 useless extension candidates. Maximal degree in co-relation 119804. Up to 53248 conditions per place. [2023-09-01 06:52:48,119 INFO L119 LiptonReduction]: Number of co-enabled transitions 269568 [2023-09-01 06:52:52,586 INFO L134 LiptonReduction]: Checked pairs total: 845933 [2023-09-01 06:52:52,586 INFO L136 LiptonReduction]: Total number of compositions: 389 [2023-09-01 06:52:52,587 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:52:52,588 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@729e681e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:52:52,588 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:52:52,903 INFO L130 PetriNetUnfolder]: 940/2975 cut-off events. [2023-09-01 06:52:52,903 INFO L131 PetriNetUnfolder]: For 1672/1672 co-relation queries the response was YES. [2023-09-01 06:52:52,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:52:52,903 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 06:52:52,903 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:52:52,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:52:52,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1723094777, now seen corresponding path program 1 times [2023-09-01 06:52:52,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:52:52,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317553241] [2023-09-01 06:52:52,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:52:52,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:52:52,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:52:52,935 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:52:52,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:52:52,959 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:52:52,960 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:52:52,960 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:52:52,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-09-01 06:52:52,960 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 06:52:52,961 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:52:52,961 WARN L233 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:52:52,961 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2023-09-01 06:52:52,999 INFO L144 ThreadInstanceAdder]: Constructed 14 joinOtherThreadTransitions. [2023-09-01 06:52:53,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 536 places, 612 transitions, 1518 flow