./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_61-invariant_racing.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_61-invariant_racing.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3465c34fa1c26a5c7a3494350123ab41e5828c33cb08ac3f67b81737d460e559 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 00:47:01,433 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 00:47:01,435 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 00:47:01,478 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 00:47:01,480 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 00:47:01,483 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 00:47:01,485 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 00:47:01,487 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 00:47:01,489 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 00:47:01,493 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 00:47:01,494 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 00:47:01,497 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 00:47:01,497 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 00:47:01,499 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 00:47:01,500 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 00:47:01,505 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 00:47:01,506 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 00:47:01,507 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 00:47:01,521 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 00:47:01,525 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 00:47:01,527 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 00:47:01,528 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 00:47:01,529 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 00:47:01,530 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 00:47:01,536 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 00:47:01,536 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 00:47:01,537 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 00:47:01,538 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 00:47:01,539 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 00:47:01,540 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 00:47:01,540 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 00:47:01,545 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 00:47:01,546 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 00:47:01,547 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 00:47:01,548 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 00:47:01,549 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 00:47:01,549 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 00:47:01,549 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 00:47:01,550 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 00:47:01,550 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 00:47:01,551 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 00:47:01,553 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 00:47:01,585 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 00:47:01,586 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 00:47:01,587 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 00:47:01,587 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 00:47:01,588 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 00:47:01,588 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 00:47:01,588 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 00:47:01,589 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 00:47:01,589 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 00:47:01,589 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 00:47:01,590 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 00:47:01,590 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 00:47:01,590 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 00:47:01,590 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 00:47:01,591 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 00:47:01,591 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 00:47:01,591 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 00:47:01,591 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 00:47:01,591 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 00:47:01,591 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 00:47:01,592 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 00:47:01,592 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 00:47:01,592 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 00:47:01,592 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 00:47:01,592 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 00:47:01,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 00:47:01,593 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 00:47:01,593 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 00:47:01,593 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 00:47:01,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 00:47:01,594 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 00:47:01,594 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 00:47:01,594 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 00:47:01,594 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 00:47:01,595 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3465c34fa1c26a5c7a3494350123ab41e5828c33cb08ac3f67b81737d460e559 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 00:47:01,904 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 00:47:01,925 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 00:47:01,928 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 00:47:01,928 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 00:47:01,930 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 00:47:01,931 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_61-invariant_racing.i [2023-09-01 00:47:03,064 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 00:47:03,322 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 00:47:03,326 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_61-invariant_racing.i [2023-09-01 00:47:03,337 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d863ad26/4df4ab166a4b4f9d8cdeb696f50b26f4/FLAG12817a7ac [2023-09-01 00:47:03,347 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d863ad26/4df4ab166a4b4f9d8cdeb696f50b26f4 [2023-09-01 00:47:03,349 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 00:47:03,350 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 00:47:03,351 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 00:47:03,352 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 00:47:03,358 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 00:47:03,359 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:47:03" (1/1) ... [2023-09-01 00:47:03,360 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16536edb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:47:03, skipping insertion in model container [2023-09-01 00:47:03,360 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:47:03" (1/1) ... [2023-09-01 00:47:03,366 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 00:47:03,411 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 00:47:03,663 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_61-invariant_racing.i[30176,30189] [2023-09-01 00:47:03,686 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 00:47:03,700 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 00:47:03,734 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_61-invariant_racing.i[30176,30189] [2023-09-01 00:47:03,750 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 00:47:03,796 INFO L208 MainTranslator]: Completed translation [2023-09-01 00:47:03,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:47:03 WrapperNode [2023-09-01 00:47:03,797 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 00:47:03,798 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 00:47:03,798 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 00:47:03,798 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 00:47:03,803 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:47:03" (1/1) ... [2023-09-01 00:47:03,832 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:47:03" (1/1) ... [2023-09-01 00:47:03,858 INFO L138 Inliner]: procedures = 170, calls = 32, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 96 [2023-09-01 00:47:03,858 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 00:47:03,859 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 00:47:03,859 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 00:47:03,859 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 00:47:03,867 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:47:03" (1/1) ... [2023-09-01 00:47:03,867 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:47:03" (1/1) ... [2023-09-01 00:47:03,884 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:47:03" (1/1) ... [2023-09-01 00:47:03,885 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:47:03" (1/1) ... [2023-09-01 00:47:03,889 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:47:03" (1/1) ... [2023-09-01 00:47:03,892 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:47:03" (1/1) ... [2023-09-01 00:47:03,893 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:47:03" (1/1) ... [2023-09-01 00:47:03,894 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:47:03" (1/1) ... [2023-09-01 00:47:03,896 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 00:47:03,909 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 00:47:03,909 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 00:47:03,909 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 00:47:03,910 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:47:03" (1/1) ... [2023-09-01 00:47:03,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 00:47:03,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:47:03,936 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 00:47:03,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 00:47:03,975 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 00:47:03,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 00:47:03,976 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 00:47:03,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 00:47:03,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 00:47:03,976 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-09-01 00:47:03,976 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-09-01 00:47:03,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 00:47:03,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 00:47:03,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 00:47:03,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 00:47:03,978 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 00:47:04,167 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 00:47:04,168 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 00:47:04,406 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 00:47:04,416 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 00:47:04,418 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-09-01 00:47:04,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:47:04 BoogieIcfgContainer [2023-09-01 00:47:04,421 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 00:47:04,422 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 00:47:04,423 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 00:47:04,426 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 00:47:04,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 12:47:03" (1/3) ... [2023-09-01 00:47:04,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cbfa47c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:47:04, skipping insertion in model container [2023-09-01 00:47:04,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:47:03" (2/3) ... [2023-09-01 00:47:04,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cbfa47c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:47:04, skipping insertion in model container [2023-09-01 00:47:04,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:47:04" (3/3) ... [2023-09-01 00:47:04,428 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_61-invariant_racing.i [2023-09-01 00:47:04,443 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 00:47:04,444 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-09-01 00:47:04,444 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 00:47:04,536 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-09-01 00:47:04,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 116 places, 132 transitions, 272 flow [2023-09-01 00:47:04,643 INFO L130 PetriNetUnfolder]: 30/194 cut-off events. [2023-09-01 00:47:04,645 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 00:47:04,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 194 events. 30/194 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 608 event pairs, 0 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 98. Up to 6 conditions per place. [2023-09-01 00:47:04,652 INFO L82 GeneralOperation]: Start removeDead. Operand has 116 places, 132 transitions, 272 flow [2023-09-01 00:47:04,661 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 112 places, 127 transitions, 259 flow [2023-09-01 00:47:04,664 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:47:04,682 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 112 places, 127 transitions, 259 flow [2023-09-01 00:47:04,687 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 112 places, 127 transitions, 259 flow [2023-09-01 00:47:04,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 127 transitions, 259 flow [2023-09-01 00:47:04,717 INFO L130 PetriNetUnfolder]: 29/189 cut-off events. [2023-09-01 00:47:04,724 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:47:04,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194 conditions, 189 events. 29/189 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 588 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 98. Up to 6 conditions per place. [2023-09-01 00:47:04,727 INFO L119 LiptonReduction]: Number of co-enabled transitions 4216 [2023-09-01 00:47:07,164 INFO L134 LiptonReduction]: Checked pairs total: 11832 [2023-09-01 00:47:07,170 INFO L136 LiptonReduction]: Total number of compositions: 96 [2023-09-01 00:47:07,184 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:47:07,189 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@433828a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:47:07,189 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:47:07,201 INFO L130 PetriNetUnfolder]: 7/44 cut-off events. [2023-09-01 00:47:07,201 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:47:07,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:47:07,202 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-09-01 00:47:07,202 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:47:07,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:47:07,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1823519992, now seen corresponding path program 1 times [2023-09-01 00:47:07,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:47:07,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753800808] [2023-09-01 00:47:07,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:47:07,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:47:07,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:47:07,311 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:47:07,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:47:07,349 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:47:07,353 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:47:07,354 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:47:07,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 00:47:07,356 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:47:07,361 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:47:07,361 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:47:07,361 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-09-01 00:47:07,387 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 00:47:07,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 165 transitions, 348 flow [2023-09-01 00:47:07,439 INFO L130 PetriNetUnfolder]: 51/318 cut-off events. [2023-09-01 00:47:07,439 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 00:47:07,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332 conditions, 318 events. 51/318 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1127 event pairs, 0 based on Foata normal form. 0/242 useless extension candidates. Maximal degree in co-relation 196. Up to 9 conditions per place. [2023-09-01 00:47:07,445 INFO L82 GeneralOperation]: Start removeDead. Operand has 143 places, 165 transitions, 348 flow [2023-09-01 00:47:07,447 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 165 transitions, 348 flow [2023-09-01 00:47:07,447 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:47:07,448 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 143 places, 165 transitions, 348 flow [2023-09-01 00:47:07,448 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 143 places, 165 transitions, 348 flow [2023-09-01 00:47:07,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 165 transitions, 348 flow [2023-09-01 00:47:07,490 INFO L130 PetriNetUnfolder]: 51/318 cut-off events. [2023-09-01 00:47:07,491 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 00:47:07,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332 conditions, 318 events. 51/318 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1127 event pairs, 0 based on Foata normal form. 0/242 useless extension candidates. Maximal degree in co-relation 196. Up to 9 conditions per place. [2023-09-01 00:47:07,499 INFO L119 LiptonReduction]: Number of co-enabled transitions 11036 [2023-09-01 00:47:09,738 INFO L134 LiptonReduction]: Checked pairs total: 34019 [2023-09-01 00:47:09,739 INFO L136 LiptonReduction]: Total number of compositions: 111 [2023-09-01 00:47:09,741 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:47:09,742 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@433828a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:47:09,742 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:47:09,749 INFO L130 PetriNetUnfolder]: 24/105 cut-off events. [2023-09-01 00:47:09,750 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 00:47:09,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:47:09,750 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-09-01 00:47:09,750 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:47:09,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:47:09,751 INFO L85 PathProgramCache]: Analyzing trace with hash 47940055, now seen corresponding path program 1 times [2023-09-01 00:47:09,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:47:09,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428783431] [2023-09-01 00:47:09,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:47:09,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:47:09,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:47:09,776 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:47:09,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:47:09,802 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:47:09,802 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:47:09,802 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:47:09,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 00:47:09,803 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:47:09,803 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:47:09,804 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:47:09,804 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-09-01 00:47:09,821 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 00:47:09,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 198 transitions, 426 flow [2023-09-01 00:47:09,875 INFO L130 PetriNetUnfolder]: 77/483 cut-off events. [2023-09-01 00:47:09,875 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-09-01 00:47:09,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 511 conditions, 483 events. 77/483 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1880 event pairs, 1 based on Foata normal form. 0/366 useless extension candidates. Maximal degree in co-relation 326. Up to 16 conditions per place. [2023-09-01 00:47:09,878 INFO L82 GeneralOperation]: Start removeDead. Operand has 170 places, 198 transitions, 426 flow [2023-09-01 00:47:09,882 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 170 places, 198 transitions, 426 flow [2023-09-01 00:47:09,882 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:47:09,883 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 170 places, 198 transitions, 426 flow [2023-09-01 00:47:09,887 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 170 places, 198 transitions, 426 flow [2023-09-01 00:47:09,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 198 transitions, 426 flow [2023-09-01 00:47:09,930 INFO L130 PetriNetUnfolder]: 77/483 cut-off events. [2023-09-01 00:47:09,931 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-09-01 00:47:09,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 511 conditions, 483 events. 77/483 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1880 event pairs, 1 based on Foata normal form. 0/366 useless extension candidates. Maximal degree in co-relation 326. Up to 16 conditions per place. [2023-09-01 00:47:09,949 INFO L119 LiptonReduction]: Number of co-enabled transitions 19716 [2023-09-01 00:47:12,420 INFO L134 LiptonReduction]: Checked pairs total: 65708 [2023-09-01 00:47:12,420 INFO L136 LiptonReduction]: Total number of compositions: 129 [2023-09-01 00:47:12,422 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:47:12,423 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@433828a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:47:12,423 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:47:12,433 INFO L130 PetriNetUnfolder]: 38/160 cut-off events. [2023-09-01 00:47:12,433 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-09-01 00:47:12,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:47:12,434 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-09-01 00:47:12,434 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:47:12,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:47:12,435 INFO L85 PathProgramCache]: Analyzing trace with hash 161102020, now seen corresponding path program 1 times [2023-09-01 00:47:12,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:47:12,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894572773] [2023-09-01 00:47:12,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:47:12,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:47:12,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:47:12,468 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:47:12,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:47:12,491 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:47:12,492 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:47:12,492 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:47:12,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 00:47:12,492 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:47:12,493 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:47:12,493 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:47:12,493 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-09-01 00:47:12,514 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-09-01 00:47:12,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 231 transitions, 506 flow [2023-09-01 00:47:12,586 INFO L130 PetriNetUnfolder]: 115/732 cut-off events. [2023-09-01 00:47:12,587 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-09-01 00:47:12,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 787 conditions, 732 events. 115/732 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3205 event pairs, 6 based on Foata normal form. 0/554 useless extension candidates. Maximal degree in co-relation 503. Up to 32 conditions per place. [2023-09-01 00:47:12,594 INFO L82 GeneralOperation]: Start removeDead. Operand has 197 places, 231 transitions, 506 flow [2023-09-01 00:47:12,599 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 197 places, 231 transitions, 506 flow [2023-09-01 00:47:12,599 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:47:12,599 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 197 places, 231 transitions, 506 flow [2023-09-01 00:47:12,600 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 197 places, 231 transitions, 506 flow [2023-09-01 00:47:12,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 231 transitions, 506 flow [2023-09-01 00:47:12,679 INFO L130 PetriNetUnfolder]: 115/732 cut-off events. [2023-09-01 00:47:12,680 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-09-01 00:47:12,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 787 conditions, 732 events. 115/732 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3205 event pairs, 6 based on Foata normal form. 0/554 useless extension candidates. Maximal degree in co-relation 503. Up to 32 conditions per place. [2023-09-01 00:47:12,699 INFO L119 LiptonReduction]: Number of co-enabled transitions 30504 [2023-09-01 00:47:15,263 INFO L134 LiptonReduction]: Checked pairs total: 107912 [2023-09-01 00:47:15,264 INFO L136 LiptonReduction]: Total number of compositions: 144 [2023-09-01 00:47:15,265 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:47:15,266 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@433828a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:47:15,266 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:47:15,281 INFO L130 PetriNetUnfolder]: 58/230 cut-off events. [2023-09-01 00:47:15,281 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2023-09-01 00:47:15,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:47:15,282 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-09-01 00:47:15,282 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:47:15,282 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:47:15,282 INFO L85 PathProgramCache]: Analyzing trace with hash -518118980, now seen corresponding path program 1 times [2023-09-01 00:47:15,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:47:15,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524434348] [2023-09-01 00:47:15,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:47:15,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:47:15,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:47:15,308 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:47:15,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:47:15,330 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:47:15,331 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:47:15,331 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:47:15,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 00:47:15,331 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:47:15,332 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:47:15,332 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:47:15,332 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-09-01 00:47:15,354 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-09-01 00:47:15,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 224 places, 264 transitions, 588 flow [2023-09-01 00:47:15,503 INFO L130 PetriNetUnfolder]: 181/1153 cut-off events. [2023-09-01 00:47:15,503 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-09-01 00:47:15,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1264 conditions, 1153 events. 181/1153 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5900 event pairs, 23 based on Foata normal form. 0/874 useless extension candidates. Maximal degree in co-relation 777. Up to 80 conditions per place. [2023-09-01 00:47:15,512 INFO L82 GeneralOperation]: Start removeDead. Operand has 224 places, 264 transitions, 588 flow [2023-09-01 00:47:15,521 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 224 places, 264 transitions, 588 flow [2023-09-01 00:47:15,521 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:47:15,521 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 224 places, 264 transitions, 588 flow [2023-09-01 00:47:15,522 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 224 places, 264 transitions, 588 flow [2023-09-01 00:47:15,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 224 places, 264 transitions, 588 flow [2023-09-01 00:47:15,648 INFO L130 PetriNetUnfolder]: 181/1153 cut-off events. [2023-09-01 00:47:15,649 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-09-01 00:47:15,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1264 conditions, 1153 events. 181/1153 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5900 event pairs, 23 based on Foata normal form. 0/874 useless extension candidates. Maximal degree in co-relation 777. Up to 80 conditions per place. [2023-09-01 00:47:15,710 INFO L119 LiptonReduction]: Number of co-enabled transitions 43400 [2023-09-01 00:47:18,112 INFO L134 LiptonReduction]: Checked pairs total: 154976 [2023-09-01 00:47:18,112 INFO L136 LiptonReduction]: Total number of compositions: 164 [2023-09-01 00:47:18,114 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:47:18,115 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@433828a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:47:18,115 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:47:18,135 INFO L130 PetriNetUnfolder]: 71/293 cut-off events. [2023-09-01 00:47:18,135 INFO L131 PetriNetUnfolder]: For 41/41 co-relation queries the response was YES. [2023-09-01 00:47:18,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:47:18,136 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:47:18,136 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:47:18,136 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:47:18,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1121128378, now seen corresponding path program 1 times [2023-09-01 00:47:18,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:47:18,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693288234] [2023-09-01 00:47:18,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:47:18,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:47:18,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:47:18,196 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:47:18,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:47:18,231 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:47:18,235 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:47:18,235 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:47:18,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 00:47:18,235 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:47:18,236 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:47:18,236 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:47:18,237 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-09-01 00:47:18,289 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2023-09-01 00:47:18,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 251 places, 297 transitions, 672 flow [2023-09-01 00:47:18,599 INFO L130 PetriNetUnfolder]: 311/1926 cut-off events. [2023-09-01 00:47:18,599 INFO L131 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2023-09-01 00:47:18,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2158 conditions, 1926 events. 311/1926 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 11842 event pairs, 72 based on Foata normal form. 0/1466 useless extension candidates. Maximal degree in co-relation 1252. Up to 192 conditions per place. [2023-09-01 00:47:18,616 INFO L82 GeneralOperation]: Start removeDead. Operand has 251 places, 297 transitions, 672 flow [2023-09-01 00:47:18,631 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 251 places, 297 transitions, 672 flow [2023-09-01 00:47:18,631 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:47:18,631 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 251 places, 297 transitions, 672 flow [2023-09-01 00:47:18,632 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 251 places, 297 transitions, 672 flow [2023-09-01 00:47:18,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 251 places, 297 transitions, 672 flow [2023-09-01 00:47:18,897 INFO L130 PetriNetUnfolder]: 311/1926 cut-off events. [2023-09-01 00:47:18,897 INFO L131 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2023-09-01 00:47:18,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2158 conditions, 1926 events. 311/1926 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 11842 event pairs, 72 based on Foata normal form. 0/1466 useless extension candidates. Maximal degree in co-relation 1252. Up to 192 conditions per place. [2023-09-01 00:47:19,029 INFO L119 LiptonReduction]: Number of co-enabled transitions 58404 [2023-09-01 00:47:21,780 INFO L134 LiptonReduction]: Checked pairs total: 239426 [2023-09-01 00:47:21,780 INFO L136 LiptonReduction]: Total number of compositions: 183 [2023-09-01 00:47:21,782 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:47:21,782 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@433828a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:47:21,783 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:47:21,815 INFO L130 PetriNetUnfolder]: 90/374 cut-off events. [2023-09-01 00:47:21,815 INFO L131 PetriNetUnfolder]: For 70/70 co-relation queries the response was YES. [2023-09-01 00:47:21,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:47:21,816 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:47:21,816 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:47:21,816 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:47:21,817 INFO L85 PathProgramCache]: Analyzing trace with hash -97928367, now seen corresponding path program 1 times [2023-09-01 00:47:21,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:47:21,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026483345] [2023-09-01 00:47:21,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:47:21,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:47:21,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:47:21,853 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:47:21,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:47:21,900 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:47:21,901 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:47:21,901 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:47:21,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 00:47:21,901 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:47:21,902 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:47:21,902 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:47:21,902 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-09-01 00:47:21,934 INFO L144 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2023-09-01 00:47:21,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 278 places, 330 transitions, 758 flow [2023-09-01 00:47:22,522 INFO L130 PetriNetUnfolder]: 585/3419 cut-off events. [2023-09-01 00:47:22,522 INFO L131 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2023-09-01 00:47:22,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3917 conditions, 3419 events. 585/3419 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 25233 event pairs, 201 based on Foata normal form. 0/2618 useless extension candidates. Maximal degree in co-relation 2144. Up to 448 conditions per place. [2023-09-01 00:47:22,562 INFO L82 GeneralOperation]: Start removeDead. Operand has 278 places, 330 transitions, 758 flow [2023-09-01 00:47:22,588 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 278 places, 330 transitions, 758 flow [2023-09-01 00:47:22,588 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:47:22,589 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 278 places, 330 transitions, 758 flow [2023-09-01 00:47:22,589 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 278 places, 330 transitions, 758 flow [2023-09-01 00:47:22,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 278 places, 330 transitions, 758 flow [2023-09-01 00:47:23,172 INFO L130 PetriNetUnfolder]: 585/3419 cut-off events. [2023-09-01 00:47:23,172 INFO L131 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2023-09-01 00:47:23,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3917 conditions, 3419 events. 585/3419 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 25233 event pairs, 201 based on Foata normal form. 0/2618 useless extension candidates. Maximal degree in co-relation 2144. Up to 448 conditions per place. [2023-09-01 00:47:23,315 INFO L119 LiptonReduction]: Number of co-enabled transitions 75516 [2023-09-01 00:47:26,006 INFO L134 LiptonReduction]: Checked pairs total: 282775 [2023-09-01 00:47:26,007 INFO L136 LiptonReduction]: Total number of compositions: 196 [2023-09-01 00:47:26,008 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:47:26,008 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@433828a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:47:26,009 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:47:26,047 INFO L130 PetriNetUnfolder]: 120/489 cut-off events. [2023-09-01 00:47:26,047 INFO L131 PetriNetUnfolder]: For 113/113 co-relation queries the response was YES. [2023-09-01 00:47:26,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:47:26,047 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:47:26,047 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:47:26,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:47:26,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1429794739, now seen corresponding path program 1 times [2023-09-01 00:47:26,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:47:26,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770086961] [2023-09-01 00:47:26,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:47:26,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:47:26,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:47:26,091 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:47:26,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:47:26,127 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:47:26,132 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:47:26,132 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:47:26,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 00:47:26,133 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:47:26,134 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:47:26,134 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:47:26,134 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-09-01 00:47:26,174 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-09-01 00:47:26,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 305 places, 363 transitions, 846 flow [2023-09-01 00:47:27,267 INFO L130 PetriNetUnfolder]: 1179/6384 cut-off events. [2023-09-01 00:47:27,267 INFO L131 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2023-09-01 00:47:27,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7469 conditions, 6384 events. 1179/6384 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 55550 event pairs, 522 based on Foata normal form. 0/4922 useless extension candidates. Maximal degree in co-relation 3901. Up to 1024 conditions per place. [2023-09-01 00:47:27,331 INFO L82 GeneralOperation]: Start removeDead. Operand has 305 places, 363 transitions, 846 flow [2023-09-01 00:47:27,387 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 305 places, 363 transitions, 846 flow [2023-09-01 00:47:27,387 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:47:27,387 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 305 places, 363 transitions, 846 flow [2023-09-01 00:47:27,388 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 305 places, 363 transitions, 846 flow [2023-09-01 00:47:27,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 305 places, 363 transitions, 846 flow [2023-09-01 00:47:28,402 INFO L130 PetriNetUnfolder]: 1179/6384 cut-off events. [2023-09-01 00:47:28,403 INFO L131 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2023-09-01 00:47:28,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7469 conditions, 6384 events. 1179/6384 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 55550 event pairs, 522 based on Foata normal form. 0/4922 useless extension candidates. Maximal degree in co-relation 3901. Up to 1024 conditions per place. [2023-09-01 00:47:28,663 INFO L119 LiptonReduction]: Number of co-enabled transitions 94736 [2023-09-01 00:47:31,588 INFO L134 LiptonReduction]: Checked pairs total: 356732 [2023-09-01 00:47:31,589 INFO L136 LiptonReduction]: Total number of compositions: 211 [2023-09-01 00:47:31,590 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:47:31,590 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@433828a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:47:31,591 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:47:31,643 INFO L130 PetriNetUnfolder]: 152/624 cut-off events. [2023-09-01 00:47:31,643 INFO L131 PetriNetUnfolder]: For 177/177 co-relation queries the response was YES. [2023-09-01 00:47:31,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:47:31,644 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:47:31,644 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:47:31,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:47:31,644 INFO L85 PathProgramCache]: Analyzing trace with hash 664098121, now seen corresponding path program 1 times [2023-09-01 00:47:31,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:47:31,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215013970] [2023-09-01 00:47:31,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:47:31,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:47:31,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:47:31,664 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:47:31,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:47:31,688 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:47:31,689 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:47:31,689 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:47:31,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 00:47:31,689 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:47:31,690 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:47:31,690 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:47:31,690 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-09-01 00:47:31,717 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-09-01 00:47:31,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 332 places, 396 transitions, 936 flow [2023-09-01 00:47:33,773 INFO L130 PetriNetUnfolder]: 2477/12357 cut-off events. [2023-09-01 00:47:33,773 INFO L131 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2023-09-01 00:47:33,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14734 conditions, 12357 events. 2477/12357 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 125981 event pairs, 1291 based on Foata normal form. 0/9594 useless extension candidates. Maximal degree in co-relation 7451. Up to 2304 conditions per place. [2023-09-01 00:47:33,921 INFO L82 GeneralOperation]: Start removeDead. Operand has 332 places, 396 transitions, 936 flow [2023-09-01 00:47:34,014 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 332 places, 396 transitions, 936 flow [2023-09-01 00:47:34,015 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:47:34,015 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 332 places, 396 transitions, 936 flow [2023-09-01 00:47:34,015 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 332 places, 396 transitions, 936 flow [2023-09-01 00:47:34,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 332 places, 396 transitions, 936 flow [2023-09-01 00:47:36,453 INFO L130 PetriNetUnfolder]: 2477/12357 cut-off events. [2023-09-01 00:47:36,454 INFO L131 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2023-09-01 00:47:36,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14734 conditions, 12357 events. 2477/12357 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 125981 event pairs, 1291 based on Foata normal form. 0/9594 useless extension candidates. Maximal degree in co-relation 7451. Up to 2304 conditions per place. [2023-09-01 00:47:36,967 INFO L119 LiptonReduction]: Number of co-enabled transitions 116064 [2023-09-01 00:47:39,923 INFO L134 LiptonReduction]: Checked pairs total: 446945 [2023-09-01 00:47:39,923 INFO L136 LiptonReduction]: Total number of compositions: 232 [2023-09-01 00:47:39,925 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:47:39,925 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@433828a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:47:39,925 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:47:40,010 INFO L130 PetriNetUnfolder]: 189/788 cut-off events. [2023-09-01 00:47:40,011 INFO L131 PetriNetUnfolder]: For 272/272 co-relation queries the response was YES. [2023-09-01 00:47:40,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:47:40,011 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:47:40,011 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:47:40,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:47:40,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1446219898, now seen corresponding path program 1 times [2023-09-01 00:47:40,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:47:40,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648535201] [2023-09-01 00:47:40,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:47:40,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:47:40,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:47:40,034 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:47:40,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:47:40,055 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:47:40,055 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:47:40,055 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:47:40,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 00:47:40,056 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:47:40,056 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:47:40,056 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:47:40,057 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-09-01 00:47:40,089 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2023-09-01 00:47:40,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 359 places, 429 transitions, 1028 flow [2023-09-01 00:47:44,959 INFO L130 PetriNetUnfolder]: 5311/24474 cut-off events. [2023-09-01 00:47:44,959 INFO L131 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2023-09-01 00:47:45,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29680 conditions, 24474 events. 5311/24474 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 281574 event pairs, 3084 based on Foata normal form. 0/19130 useless extension candidates. Maximal degree in co-relation 14714. Up to 5120 conditions per place. [2023-09-01 00:47:45,266 INFO L82 GeneralOperation]: Start removeDead. Operand has 359 places, 429 transitions, 1028 flow [2023-09-01 00:47:45,466 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 359 places, 429 transitions, 1028 flow [2023-09-01 00:47:45,467 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:47:45,467 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 359 places, 429 transitions, 1028 flow [2023-09-01 00:47:45,467 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 359 places, 429 transitions, 1028 flow [2023-09-01 00:47:45,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 359 places, 429 transitions, 1028 flow [2023-09-01 00:47:50,339 INFO L130 PetriNetUnfolder]: 5311/24474 cut-off events. [2023-09-01 00:47:50,339 INFO L131 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2023-09-01 00:47:50,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29680 conditions, 24474 events. 5311/24474 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 281574 event pairs, 3084 based on Foata normal form. 0/19130 useless extension candidates. Maximal degree in co-relation 14714. Up to 5120 conditions per place. [2023-09-01 00:47:51,641 INFO L119 LiptonReduction]: Number of co-enabled transitions 139500 [2023-09-01 00:47:54,609 INFO L134 LiptonReduction]: Checked pairs total: 542690 [2023-09-01 00:47:54,609 INFO L136 LiptonReduction]: Total number of compositions: 246 [2023-09-01 00:47:54,611 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:47:54,611 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@433828a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:47:54,611 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:47:54,712 INFO L130 PetriNetUnfolder]: 267/1061 cut-off events. [2023-09-01 00:47:54,724 INFO L131 PetriNetUnfolder]: For 412/412 co-relation queries the response was YES. [2023-09-01 00:47:54,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:47:54,725 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:47:54,725 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:47:54,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:47:54,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1257084704, now seen corresponding path program 1 times [2023-09-01 00:47:54,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:47:54,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761904064] [2023-09-01 00:47:54,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:47:54,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:47:54,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:47:54,747 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:47:54,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:47:54,772 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:47:54,772 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:47:54,772 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:47:54,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 00:47:54,773 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:47:54,773 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:47:54,773 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:47:54,773 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-09-01 00:47:54,802 INFO L144 ThreadInstanceAdder]: Constructed 11 joinOtherThreadTransitions. [2023-09-01 00:47:54,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 386 places, 462 transitions, 1122 flow [2023-09-01 00:48:05,633 INFO L130 PetriNetUnfolder]: 11473/49135 cut-off events. [2023-09-01 00:48:05,633 INFO L131 PetriNetUnfolder]: For 11539/11539 co-relation queries the response was YES. [2023-09-01 00:48:06,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60499 conditions, 49135 events. 11473/49135 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 1134. Compared 626435 event pairs, 7181 based on Foata normal form. 0/38650 useless extension candidates. Maximal degree in co-relation 29658. Up to 11264 conditions per place. [2023-09-01 00:48:06,498 INFO L82 GeneralOperation]: Start removeDead. Operand has 386 places, 462 transitions, 1122 flow [2023-09-01 00:48:07,261 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 386 places, 462 transitions, 1122 flow [2023-09-01 00:48:07,261 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:48:07,262 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 386 places, 462 transitions, 1122 flow [2023-09-01 00:48:07,262 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 386 places, 462 transitions, 1122 flow [2023-09-01 00:48:07,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 386 places, 462 transitions, 1122 flow [2023-09-01 00:48:17,808 INFO L130 PetriNetUnfolder]: 11473/49135 cut-off events. [2023-09-01 00:48:17,809 INFO L131 PetriNetUnfolder]: For 11539/11539 co-relation queries the response was YES. [2023-09-01 00:48:18,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60499 conditions, 49135 events. 11473/49135 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 1134. Compared 626435 event pairs, 7181 based on Foata normal form. 0/38650 useless extension candidates. Maximal degree in co-relation 29658. Up to 11264 conditions per place. [2023-09-01 00:48:21,023 INFO L119 LiptonReduction]: Number of co-enabled transitions 165044 [2023-09-01 00:48:24,270 INFO L134 LiptonReduction]: Checked pairs total: 654531 [2023-09-01 00:48:24,270 INFO L136 LiptonReduction]: Total number of compositions: 262 [2023-09-01 00:48:24,271 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:48:24,272 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@433828a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:48:24,272 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:48:24,392 INFO L130 PetriNetUnfolder]: 374/1429 cut-off events. [2023-09-01 00:48:24,392 INFO L131 PetriNetUnfolder]: For 619/619 co-relation queries the response was YES. [2023-09-01 00:48:24,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:48:24,393 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:48:24,393 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:48:24,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:48:24,393 INFO L85 PathProgramCache]: Analyzing trace with hash -935680067, now seen corresponding path program 1 times [2023-09-01 00:48:24,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:48:24,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792096103] [2023-09-01 00:48:24,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:48:24,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:48:24,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:48:24,422 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:48:24,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:48:24,449 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:48:24,449 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:48:24,449 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:48:24,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-09-01 00:48:24,450 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:48:24,451 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:48:24,451 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:48:24,451 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-09-01 00:48:24,484 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2023-09-01 00:48:24,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 413 places, 495 transitions, 1218 flow [2023-09-01 00:48:47,605 INFO L130 PetriNetUnfolder]: 24803/99396 cut-off events. [2023-09-01 00:48:47,605 INFO L131 PetriNetUnfolder]: For 24928/24928 co-relation queries the response was YES. [2023-09-01 00:48:50,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124087 conditions, 99396 events. 24803/99396 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 2188. Compared 1391908 event pairs, 16398 based on Foata normal form. 0/78650 useless extension candidates. Maximal degree in co-relation 60477. Up to 24576 conditions per place. [2023-09-01 00:48:50,475 INFO L82 GeneralOperation]: Start removeDead. Operand has 413 places, 495 transitions, 1218 flow [2023-09-01 00:48:52,188 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 413 places, 495 transitions, 1218 flow [2023-09-01 00:48:52,188 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:48:52,188 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 413 places, 495 transitions, 1218 flow [2023-09-01 00:48:52,188 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 413 places, 495 transitions, 1218 flow [2023-09-01 00:48:52,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 413 places, 495 transitions, 1218 flow [2023-09-01 00:49:16,215 INFO L130 PetriNetUnfolder]: 24803/99396 cut-off events. [2023-09-01 00:49:16,215 INFO L131 PetriNetUnfolder]: For 24928/24928 co-relation queries the response was YES. [2023-09-01 00:49:18,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124087 conditions, 99396 events. 24803/99396 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 2188. Compared 1391908 event pairs, 16398 based on Foata normal form. 0/78650 useless extension candidates. Maximal degree in co-relation 60477. Up to 24576 conditions per place. [2023-09-01 00:49:24,428 INFO L119 LiptonReduction]: Number of co-enabled transitions 192696 [2023-09-01 00:49:27,620 INFO L134 LiptonReduction]: Checked pairs total: 755463 [2023-09-01 00:49:27,620 INFO L136 LiptonReduction]: Total number of compositions: 277 [2023-09-01 00:49:27,622 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:49:27,623 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@433828a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:49:27,623 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:49:27,789 INFO L130 PetriNetUnfolder]: 543/1969 cut-off events. [2023-09-01 00:49:27,789 INFO L131 PetriNetUnfolder]: For 927/927 co-relation queries the response was YES. [2023-09-01 00:49:27,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:49:27,790 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:49:27,790 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:49:27,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:49:27,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1843903591, now seen corresponding path program 1 times [2023-09-01 00:49:27,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:49:27,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714225089] [2023-09-01 00:49:27,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:49:27,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:49:27,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:49:27,813 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:49:27,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:49:27,839 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:49:27,839 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:49:27,840 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:49:27,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 00:49:27,840 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:49:27,842 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:49:27,843 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:49:27,843 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-09-01 00:49:27,876 INFO L144 ThreadInstanceAdder]: Constructed 13 joinOtherThreadTransitions. [2023-09-01 00:49:27,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 440 places, 528 transitions, 1316 flow [2023-09-01 00:50:27,069 INFO L130 PetriNetUnfolder]: 53493/201881 cut-off events. [2023-09-01 00:50:27,069 INFO L131 PetriNetUnfolder]: For 53690/53690 co-relation queries the response was YES. [2023-09-01 00:50:35,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255260 conditions, 201881 events. 53493/201881 cut-off events. For 53690/53690 co-relation queries the response was YES. Maximal size of possible extension queue 4201. Compared 3082737 event pairs, 36879 based on Foata normal form. 0/160634 useless extension candidates. Maximal degree in co-relation 124065. Up to 53248 conditions per place. [2023-09-01 00:50:35,295 INFO L82 GeneralOperation]: Start removeDead. Operand has 440 places, 528 transitions, 1316 flow [2023-09-01 00:50:40,343 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 440 places, 528 transitions, 1316 flow [2023-09-01 00:50:40,344 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:50:40,344 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 440 places, 528 transitions, 1316 flow [2023-09-01 00:50:40,344 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 440 places, 528 transitions, 1316 flow [2023-09-01 00:50:40,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 440 places, 528 transitions, 1316 flow [2023-09-01 00:51:34,654 INFO L130 PetriNetUnfolder]: 53493/201881 cut-off events. [2023-09-01 00:51:34,654 INFO L131 PetriNetUnfolder]: For 53690/53690 co-relation queries the response was YES. [2023-09-01 00:51:42,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255260 conditions, 201881 events. 53493/201881 cut-off events. For 53690/53690 co-relation queries the response was YES. Maximal size of possible extension queue 4201. Compared 3082737 event pairs, 36879 based on Foata normal form. 0/160634 useless extension candidates. Maximal degree in co-relation 124065. Up to 53248 conditions per place. [2023-09-01 00:52:09,346 INFO L119 LiptonReduction]: Number of co-enabled transitions 222456 [2023-09-01 00:52:13,245 INFO L134 LiptonReduction]: Checked pairs total: 882302 [2023-09-01 00:52:13,246 INFO L136 LiptonReduction]: Total number of compositions: 294 [2023-09-01 00:52:13,247 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:52:13,247 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@433828a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:52:13,248 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:52:13,601 INFO L130 PetriNetUnfolder]: 811/2771 cut-off events. [2023-09-01 00:52:13,602 INFO L131 PetriNetUnfolder]: For 1387/1387 co-relation queries the response was YES. [2023-09-01 00:52:13,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:52:13,602 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:52:13,602 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:52:13,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:52:13,603 INFO L85 PathProgramCache]: Analyzing trace with hash -774645491, now seen corresponding path program 1 times [2023-09-01 00:52:13,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:52:13,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356290268] [2023-09-01 00:52:13,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:52:13,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:52:13,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:52:13,672 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:52:13,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:52:13,744 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:52:13,747 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:52:13,747 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:52:13,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-09-01 00:52:13,747 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 00:52:13,749 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:52:13,749 WARN L233 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:52:13,749 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2023-09-01 00:52:13,801 INFO L144 ThreadInstanceAdder]: Constructed 14 joinOtherThreadTransitions. [2023-09-01 00:52:13,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 467 places, 561 transitions, 1416 flow