./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-2.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 79f59481c49375d27b8409383d6d600e90e5ee29536655deda4d0ae0ca7faefc --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 09:17:16,472 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 09:17:16,474 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 09:17:16,507 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 09:17:16,508 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 09:17:16,513 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 09:17:16,513 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 09:17:16,514 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 09:17:16,515 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 09:17:16,516 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 09:17:16,516 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 09:17:16,519 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 09:17:16,519 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 09:17:16,522 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 09:17:16,523 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 09:17:16,526 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 09:17:16,527 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 09:17:16,528 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 09:17:16,530 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 09:17:16,531 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 09:17:16,534 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 09:17:16,541 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 09:17:16,542 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 09:17:16,543 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 09:17:16,545 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 09:17:16,547 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 09:17:16,547 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 09:17:16,548 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 09:17:16,549 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 09:17:16,549 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 09:17:16,550 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 09:17:16,550 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 09:17:16,551 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 09:17:16,552 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 09:17:16,552 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 09:17:16,553 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 09:17:16,554 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 09:17:16,554 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 09:17:16,554 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 09:17:16,554 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 09:17:16,555 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 09:17:16,556 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 09:17:16,582 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 09:17:16,582 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 09:17:16,583 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 09:17:16,583 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 09:17:16,584 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 09:17:16,584 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 09:17:16,584 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 09:17:16,584 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 09:17:16,584 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 09:17:16,585 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 09:17:16,585 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 09:17:16,585 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 09:17:16,585 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 09:17:16,586 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 09:17:16,586 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 09:17:16,586 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 09:17:16,586 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 09:17:16,586 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 09:17:16,586 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 09:17:16,587 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 09:17:16,587 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 09:17:16,587 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 09:17:16,587 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 09:17:16,587 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 09:17:16,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 09:17:16,588 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 09:17:16,588 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 09:17:16,588 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 09:17:16,588 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 09:17:16,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 09:17:16,588 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 09:17:16,588 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 09:17:16,589 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 09:17:16,589 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 09:17:16,589 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 09:17:16,589 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 79f59481c49375d27b8409383d6d600e90e5ee29536655deda4d0ae0ca7faefc Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 09:17:16,817 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 09:17:16,830 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 09:17:16,832 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 09:17:16,832 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 09:17:16,833 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 09:17:16,833 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-2.i [2023-09-01 09:17:17,829 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 09:17:18,039 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 09:17:18,049 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-2.i [2023-09-01 09:17:18,061 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a59a88181/837a7b62affc4fb8831c16b5fd81de89/FLAG7045a9510 [2023-09-01 09:17:18,074 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a59a88181/837a7b62affc4fb8831c16b5fd81de89 [2023-09-01 09:17:18,077 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 09:17:18,078 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 09:17:18,079 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 09:17:18,079 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 09:17:18,081 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 09:17:18,081 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 09:17:18" (1/1) ... [2023-09-01 09:17:18,082 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7defe883 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:17:18, skipping insertion in model container [2023-09-01 09:17:18,082 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 09:17:18" (1/1) ... [2023-09-01 09:17:18,087 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 09:17:18,130 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 09:17:18,392 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-2.i[31164,31177] [2023-09-01 09:17:18,398 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 09:17:18,408 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 09:17:18,449 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-2.i[31164,31177] [2023-09-01 09:17:18,457 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 09:17:18,492 INFO L208 MainTranslator]: Completed translation [2023-09-01 09:17:18,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:17:18 WrapperNode [2023-09-01 09:17:18,492 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 09:17:18,493 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 09:17:18,493 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 09:17:18,493 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 09:17:18,498 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:17:18" (1/1) ... [2023-09-01 09:17:18,522 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:17:18" (1/1) ... [2023-09-01 09:17:18,546 INFO L138 Inliner]: procedures = 177, calls = 47, calls flagged for inlining = 16, calls inlined = 19, statements flattened = 188 [2023-09-01 09:17:18,547 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 09:17:18,547 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 09:17:18,547 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 09:17:18,548 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 09:17:18,553 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:17:18" (1/1) ... [2023-09-01 09:17:18,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:17:18" (1/1) ... [2023-09-01 09:17:18,571 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:17:18" (1/1) ... [2023-09-01 09:17:18,572 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:17:18" (1/1) ... [2023-09-01 09:17:18,582 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:17:18" (1/1) ... [2023-09-01 09:17:18,589 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:17:18" (1/1) ... [2023-09-01 09:17:18,590 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:17:18" (1/1) ... [2023-09-01 09:17:18,591 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:17:18" (1/1) ... [2023-09-01 09:17:18,593 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 09:17:18,596 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 09:17:18,596 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 09:17:18,597 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 09:17:18,597 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:17:18" (1/1) ... [2023-09-01 09:17:18,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 09:17:18,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 09:17:18,617 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 09:17:18,624 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 09:17:18,640 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 09:17:18,645 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-09-01 09:17:18,646 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-09-01 09:17:18,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 09:17:18,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 09:17:18,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 09:17:18,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 09:17:18,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 09:17:18,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 09:17:18,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 09:17:18,651 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 09:17:18,777 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 09:17:18,778 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 09:17:19,060 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 09:17:19,202 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 09:17:19,203 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-09-01 09:17:19,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 09:17:19 BoogieIcfgContainer [2023-09-01 09:17:19,204 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 09:17:19,206 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 09:17:19,206 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 09:17:19,208 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 09:17:19,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 09:17:18" (1/3) ... [2023-09-01 09:17:19,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cba3dcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 09:17:19, skipping insertion in model container [2023-09-01 09:17:19,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:17:18" (2/3) ... [2023-09-01 09:17:19,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cba3dcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 09:17:19, skipping insertion in model container [2023-09-01 09:17:19,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 09:17:19" (3/3) ... [2023-09-01 09:17:19,210 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas_longest-2.i [2023-09-01 09:17:19,215 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 09:17:19,221 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 09:17:19,221 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 09:17:19,221 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 09:17:19,283 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:17:19,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 114 transitions, 233 flow [2023-09-01 09:17:19,361 INFO L130 PetriNetUnfolder]: 11/124 cut-off events. [2023-09-01 09:17:19,362 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 09:17:19,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 124 events. 11/124 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 118 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 90. Up to 4 conditions per place. [2023-09-01 09:17:19,366 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 114 transitions, 233 flow [2023-09-01 09:17:19,370 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 114 transitions, 233 flow [2023-09-01 09:17:19,372 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:17:19,381 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 114 transitions, 233 flow [2023-09-01 09:17:19,384 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 107 places, 114 transitions, 233 flow [2023-09-01 09:17:19,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 114 transitions, 233 flow [2023-09-01 09:17:19,415 INFO L130 PetriNetUnfolder]: 11/124 cut-off events. [2023-09-01 09:17:19,415 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 09:17:19,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 124 events. 11/124 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 118 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 90. Up to 4 conditions per place. [2023-09-01 09:17:19,418 INFO L119 LiptonReduction]: Number of co-enabled transitions 2028 [2023-09-01 09:17:22,772 INFO L134 LiptonReduction]: Checked pairs total: 2167 [2023-09-01 09:17:22,772 INFO L136 LiptonReduction]: Total number of compositions: 104 [2023-09-01 09:17:22,781 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:17:22,785 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@27482ae1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:17:22,785 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:17:22,788 INFO L130 PetriNetUnfolder]: 2/13 cut-off events. [2023-09-01 09:17:22,788 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 09:17:22,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:17:22,789 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-09-01 09:17:22,789 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:17:22,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:17:22,792 INFO L85 PathProgramCache]: Analyzing trace with hash 174361225, now seen corresponding path program 1 times [2023-09-01 09:17:22,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:17:22,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096500050] [2023-09-01 09:17:22,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:17:22,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:17:22,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:17:22,861 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:17:22,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:17:22,885 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:17:22,886 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:17:22,887 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:17:22,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 09:17:22,889 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:17:22,890 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:17:22,891 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:17:22,891 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-09-01 09:17:22,932 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:17:22,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 193 transitions, 398 flow [2023-09-01 09:17:22,965 INFO L130 PetriNetUnfolder]: 21/215 cut-off events. [2023-09-01 09:17:22,966 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 09:17:22,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225 conditions, 215 events. 21/215 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 410 event pairs, 0 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 168. Up to 6 conditions per place. [2023-09-01 09:17:22,968 INFO L82 GeneralOperation]: Start removeDead. Operand has 179 places, 193 transitions, 398 flow [2023-09-01 09:17:22,969 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 179 places, 193 transitions, 398 flow [2023-09-01 09:17:22,969 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:17:22,969 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 193 transitions, 398 flow [2023-09-01 09:17:22,970 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 193 transitions, 398 flow [2023-09-01 09:17:22,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 193 transitions, 398 flow [2023-09-01 09:17:23,005 INFO L130 PetriNetUnfolder]: 21/215 cut-off events. [2023-09-01 09:17:23,006 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 09:17:23,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225 conditions, 215 events. 21/215 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 410 event pairs, 0 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 168. Up to 6 conditions per place. [2023-09-01 09:17:23,012 INFO L119 LiptonReduction]: Number of co-enabled transitions 16380 [2023-09-01 09:17:26,845 INFO L134 LiptonReduction]: Checked pairs total: 33585 [2023-09-01 09:17:26,845 INFO L136 LiptonReduction]: Total number of compositions: 155 [2023-09-01 09:17:26,846 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:17:26,847 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@27482ae1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:17:26,847 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:17:26,851 INFO L130 PetriNetUnfolder]: 3/31 cut-off events. [2023-09-01 09:17:26,851 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 09:17:26,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:17:26,851 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-09-01 09:17:26,851 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:17:26,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:17:26,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1971217253, now seen corresponding path program 1 times [2023-09-01 09:17:26,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:17:26,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171834757] [2023-09-01 09:17:26,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:17:26,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:17:26,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:17:26,880 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:17:26,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:17:26,910 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:17:26,910 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:17:26,912 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:17:26,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 09:17:26,912 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:17:26,913 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:17:26,913 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:17:26,913 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-09-01 09:17:26,960 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:17:26,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 251 places, 272 transitions, 565 flow [2023-09-01 09:17:26,999 INFO L130 PetriNetUnfolder]: 31/306 cut-off events. [2023-09-01 09:17:27,000 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 09:17:27,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 306 events. 31/306 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 814 event pairs, 0 based on Foata normal form. 0/268 useless extension candidates. Maximal degree in co-relation 246. Up to 8 conditions per place. [2023-09-01 09:17:27,004 INFO L82 GeneralOperation]: Start removeDead. Operand has 251 places, 272 transitions, 565 flow [2023-09-01 09:17:27,006 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 251 places, 272 transitions, 565 flow [2023-09-01 09:17:27,006 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:17:27,009 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 251 places, 272 transitions, 565 flow [2023-09-01 09:17:27,010 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 251 places, 272 transitions, 565 flow [2023-09-01 09:17:27,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 251 places, 272 transitions, 565 flow [2023-09-01 09:17:27,041 INFO L130 PetriNetUnfolder]: 31/306 cut-off events. [2023-09-01 09:17:27,041 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 09:17:27,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 306 events. 31/306 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 814 event pairs, 0 based on Foata normal form. 0/268 useless extension candidates. Maximal degree in co-relation 246. Up to 8 conditions per place. [2023-09-01 09:17:27,058 INFO L119 LiptonReduction]: Number of co-enabled transitions 43056 [2023-09-01 09:17:32,398 INFO L134 LiptonReduction]: Checked pairs total: 78907 [2023-09-01 09:17:32,398 INFO L136 LiptonReduction]: Total number of compositions: 218 [2023-09-01 09:17:32,400 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:17:32,400 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@27482ae1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:17:32,401 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:17:32,405 INFO L130 PetriNetUnfolder]: 7/58 cut-off events. [2023-09-01 09:17:32,405 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 09:17:32,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:17:32,405 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-09-01 09:17:32,405 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:17:32,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:17:32,405 INFO L85 PathProgramCache]: Analyzing trace with hash -271960691, now seen corresponding path program 1 times [2023-09-01 09:17:32,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:17:32,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970697503] [2023-09-01 09:17:32,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:17:32,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:17:32,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:17:32,424 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:17:32,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:17:32,438 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:17:32,440 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:17:32,444 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:17:32,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 09:17:32,445 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:17:32,445 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:17:32,445 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:17:32,445 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-09-01 09:17:32,495 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:17:32,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 323 places, 351 transitions, 734 flow [2023-09-01 09:17:32,540 INFO L130 PetriNetUnfolder]: 41/397 cut-off events. [2023-09-01 09:17:32,541 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-09-01 09:17:32,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 420 conditions, 397 events. 41/397 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1280 event pairs, 0 based on Foata normal form. 0/347 useless extension candidates. Maximal degree in co-relation 324. Up to 10 conditions per place. [2023-09-01 09:17:32,546 INFO L82 GeneralOperation]: Start removeDead. Operand has 323 places, 351 transitions, 734 flow [2023-09-01 09:17:32,548 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 323 places, 351 transitions, 734 flow [2023-09-01 09:17:32,548 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:17:32,549 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 323 places, 351 transitions, 734 flow [2023-09-01 09:17:32,549 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 323 places, 351 transitions, 734 flow [2023-09-01 09:17:32,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 323 places, 351 transitions, 734 flow [2023-09-01 09:17:32,619 INFO L130 PetriNetUnfolder]: 41/397 cut-off events. [2023-09-01 09:17:32,619 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-09-01 09:17:32,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 420 conditions, 397 events. 41/397 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1280 event pairs, 0 based on Foata normal form. 0/347 useless extension candidates. Maximal degree in co-relation 324. Up to 10 conditions per place. [2023-09-01 09:17:32,635 INFO L119 LiptonReduction]: Number of co-enabled transitions 82056 [2023-09-01 09:17:39,127 INFO L134 LiptonReduction]: Checked pairs total: 163123 [2023-09-01 09:17:39,128 INFO L136 LiptonReduction]: Total number of compositions: 282 [2023-09-01 09:17:39,129 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:17:39,130 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@27482ae1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:17:39,130 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:17:39,136 INFO L130 PetriNetUnfolder]: 14/94 cut-off events. [2023-09-01 09:17:39,137 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-09-01 09:17:39,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:17:39,137 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-09-01 09:17:39,137 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:17:39,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:17:39,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1535314522, now seen corresponding path program 1 times [2023-09-01 09:17:39,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:17:39,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282955179] [2023-09-01 09:17:39,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:17:39,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:17:39,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:17:39,173 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:17:39,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:17:39,196 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:17:39,196 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:17:39,196 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:17:39,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 09:17:39,201 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:17:39,201 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:17:39,201 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:17:39,202 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-09-01 09:17:39,246 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:17:39,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 395 places, 430 transitions, 905 flow [2023-09-01 09:17:39,313 INFO L130 PetriNetUnfolder]: 51/488 cut-off events. [2023-09-01 09:17:39,313 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-09-01 09:17:39,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 519 conditions, 488 events. 51/488 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1751 event pairs, 0 based on Foata normal form. 0/426 useless extension candidates. Maximal degree in co-relation 410. Up to 12 conditions per place. [2023-09-01 09:17:39,322 INFO L82 GeneralOperation]: Start removeDead. Operand has 395 places, 430 transitions, 905 flow [2023-09-01 09:17:39,326 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 395 places, 430 transitions, 905 flow [2023-09-01 09:17:39,326 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:17:39,327 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 395 places, 430 transitions, 905 flow [2023-09-01 09:17:39,327 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 395 places, 430 transitions, 905 flow [2023-09-01 09:17:39,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 395 places, 430 transitions, 905 flow [2023-09-01 09:17:39,401 INFO L130 PetriNetUnfolder]: 51/488 cut-off events. [2023-09-01 09:17:39,401 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-09-01 09:17:39,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 519 conditions, 488 events. 51/488 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1751 event pairs, 0 based on Foata normal form. 0/426 useless extension candidates. Maximal degree in co-relation 410. Up to 12 conditions per place. [2023-09-01 09:17:39,428 INFO L119 LiptonReduction]: Number of co-enabled transitions 133380 [2023-09-01 09:17:47,386 INFO L134 LiptonReduction]: Checked pairs total: 266074 [2023-09-01 09:17:47,386 INFO L136 LiptonReduction]: Total number of compositions: 342 [2023-09-01 09:17:47,387 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:17:47,388 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@27482ae1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:17:47,388 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:17:47,397 INFO L130 PetriNetUnfolder]: 22/128 cut-off events. [2023-09-01 09:17:47,398 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-09-01 09:17:47,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:17:47,398 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:17:47,398 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:17:47,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:17:47,398 INFO L85 PathProgramCache]: Analyzing trace with hash -821437459, now seen corresponding path program 1 times [2023-09-01 09:17:47,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:17:47,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609993646] [2023-09-01 09:17:47,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:17:47,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:17:47,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:17:47,441 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:17:47,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:17:47,466 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:17:47,467 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:17:47,467 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:17:47,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 09:17:47,467 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:17:47,468 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:17:47,468 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:17:47,468 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-09-01 09:17:47,542 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:17:47,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 467 places, 509 transitions, 1078 flow [2023-09-01 09:17:47,633 INFO L130 PetriNetUnfolder]: 61/579 cut-off events. [2023-09-01 09:17:47,633 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-09-01 09:17:47,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 619 conditions, 579 events. 61/579 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2262 event pairs, 0 based on Foata normal form. 0/505 useless extension candidates. Maximal degree in co-relation 507. Up to 14 conditions per place. [2023-09-01 09:17:47,647 INFO L82 GeneralOperation]: Start removeDead. Operand has 467 places, 509 transitions, 1078 flow [2023-09-01 09:17:47,654 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 467 places, 509 transitions, 1078 flow [2023-09-01 09:17:47,654 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:17:47,654 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 467 places, 509 transitions, 1078 flow [2023-09-01 09:17:47,656 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 467 places, 509 transitions, 1078 flow [2023-09-01 09:17:47,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 467 places, 509 transitions, 1078 flow [2023-09-01 09:17:47,773 INFO L130 PetriNetUnfolder]: 61/579 cut-off events. [2023-09-01 09:17:47,774 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-09-01 09:17:47,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 619 conditions, 579 events. 61/579 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2262 event pairs, 0 based on Foata normal form. 0/505 useless extension candidates. Maximal degree in co-relation 507. Up to 14 conditions per place. [2023-09-01 09:17:47,813 INFO L119 LiptonReduction]: Number of co-enabled transitions 197028 [2023-09-01 09:17:57,121 INFO L134 LiptonReduction]: Checked pairs total: 408501 [2023-09-01 09:17:57,122 INFO L136 LiptonReduction]: Total number of compositions: 409 [2023-09-01 09:17:57,123 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:17:57,123 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@27482ae1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:17:57,124 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:17:57,138 INFO L130 PetriNetUnfolder]: 28/161 cut-off events. [2023-09-01 09:17:57,139 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-09-01 09:17:57,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:17:57,139 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:17:57,140 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:17:57,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:17:57,140 INFO L85 PathProgramCache]: Analyzing trace with hash 657747243, now seen corresponding path program 1 times [2023-09-01 09:17:57,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:17:57,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741126725] [2023-09-01 09:17:57,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:17:57,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:17:57,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:17:57,190 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:17:57,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:17:57,209 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:17:57,210 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:17:57,210 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:17:57,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 09:17:57,210 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:17:57,211 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:17:57,211 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:17:57,211 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-09-01 09:17:57,305 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:17:57,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 539 places, 588 transitions, 1253 flow [2023-09-01 09:17:57,489 INFO L130 PetriNetUnfolder]: 71/670 cut-off events. [2023-09-01 09:17:57,490 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-09-01 09:17:57,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 720 conditions, 670 events. 71/670 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2752 event pairs, 0 based on Foata normal form. 0/584 useless extension candidates. Maximal degree in co-relation 605. Up to 16 conditions per place. [2023-09-01 09:17:57,513 INFO L82 GeneralOperation]: Start removeDead. Operand has 539 places, 588 transitions, 1253 flow [2023-09-01 09:17:57,519 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 539 places, 588 transitions, 1253 flow [2023-09-01 09:17:57,519 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:17:57,519 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 539 places, 588 transitions, 1253 flow [2023-09-01 09:17:57,519 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 539 places, 588 transitions, 1253 flow [2023-09-01 09:17:57,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 539 places, 588 transitions, 1253 flow [2023-09-01 09:17:57,650 INFO L130 PetriNetUnfolder]: 71/670 cut-off events. [2023-09-01 09:17:57,650 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-09-01 09:17:57,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 720 conditions, 670 events. 71/670 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2752 event pairs, 0 based on Foata normal form. 0/584 useless extension candidates. Maximal degree in co-relation 605. Up to 16 conditions per place. [2023-09-01 09:17:57,702 INFO L119 LiptonReduction]: Number of co-enabled transitions 273000 [2023-09-01 09:18:08,426 INFO L134 LiptonReduction]: Checked pairs total: 601155 [2023-09-01 09:18:08,426 INFO L136 LiptonReduction]: Total number of compositions: 471 [2023-09-01 09:18:08,428 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:18:08,430 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@27482ae1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:18:08,430 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:18:08,452 INFO L130 PetriNetUnfolder]: 36/196 cut-off events. [2023-09-01 09:18:08,452 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-09-01 09:18:08,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:18:08,452 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:18:08,453 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:18:08,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:18:08,453 INFO L85 PathProgramCache]: Analyzing trace with hash 31876957, now seen corresponding path program 1 times [2023-09-01 09:18:08,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:18:08,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860405681] [2023-09-01 09:18:08,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:18:08,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:18:08,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:18:08,488 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:18:08,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:18:08,503 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:18:08,503 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:18:08,503 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:18:08,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 09:18:08,503 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:18:08,504 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:18:08,504 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:18:08,504 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-09-01 09:18:08,593 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:18:08,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 611 places, 667 transitions, 1430 flow [2023-09-01 09:18:08,761 INFO L130 PetriNetUnfolder]: 81/761 cut-off events. [2023-09-01 09:18:08,762 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-09-01 09:18:08,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 822 conditions, 761 events. 81/761 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 3271 event pairs, 0 based on Foata normal form. 0/663 useless extension candidates. Maximal degree in co-relation 704. Up to 18 conditions per place. [2023-09-01 09:18:08,782 INFO L82 GeneralOperation]: Start removeDead. Operand has 611 places, 667 transitions, 1430 flow [2023-09-01 09:18:08,787 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 611 places, 667 transitions, 1430 flow [2023-09-01 09:18:08,788 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:18:08,788 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 611 places, 667 transitions, 1430 flow [2023-09-01 09:18:08,788 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 611 places, 667 transitions, 1430 flow [2023-09-01 09:18:08,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 611 places, 667 transitions, 1430 flow [2023-09-01 09:18:08,956 INFO L130 PetriNetUnfolder]: 81/761 cut-off events. [2023-09-01 09:18:08,956 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-09-01 09:18:08,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 822 conditions, 761 events. 81/761 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 3271 event pairs, 0 based on Foata normal form. 0/663 useless extension candidates. Maximal degree in co-relation 704. Up to 18 conditions per place. [2023-09-01 09:18:09,021 INFO L119 LiptonReduction]: Number of co-enabled transitions 361296 [2023-09-01 09:18:20,854 INFO L134 LiptonReduction]: Checked pairs total: 812240 [2023-09-01 09:18:20,854 INFO L136 LiptonReduction]: Total number of compositions: 534 [2023-09-01 09:18:20,855 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:18:20,855 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@27482ae1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:18:20,856 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:18:20,876 INFO L130 PetriNetUnfolder]: 43/232 cut-off events. [2023-09-01 09:18:20,876 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-09-01 09:18:20,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:18:20,876 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:18:20,877 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:18:20,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:18:20,877 INFO L85 PathProgramCache]: Analyzing trace with hash -277617304, now seen corresponding path program 1 times [2023-09-01 09:18:20,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:18:20,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824160217] [2023-09-01 09:18:20,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:18:20,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:18:20,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:18:20,897 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:18:20,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:18:20,911 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:18:20,911 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:18:20,912 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:18:20,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 09:18:20,912 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:18:20,912 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:18:20,912 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:18:20,912 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-09-01 09:18:21,002 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:18:21,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 683 places, 746 transitions, 1609 flow [2023-09-01 09:18:21,187 INFO L130 PetriNetUnfolder]: 91/852 cut-off events. [2023-09-01 09:18:21,188 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-09-01 09:18:21,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 925 conditions, 852 events. 91/852 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 3787 event pairs, 0 based on Foata normal form. 0/742 useless extension candidates. Maximal degree in co-relation 804. Up to 20 conditions per place. [2023-09-01 09:18:21,218 INFO L82 GeneralOperation]: Start removeDead. Operand has 683 places, 746 transitions, 1609 flow [2023-09-01 09:18:21,226 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 683 places, 746 transitions, 1609 flow [2023-09-01 09:18:21,226 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:18:21,226 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 683 places, 746 transitions, 1609 flow [2023-09-01 09:18:21,226 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 683 places, 746 transitions, 1609 flow [2023-09-01 09:18:21,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 683 places, 746 transitions, 1609 flow [2023-09-01 09:18:21,440 INFO L130 PetriNetUnfolder]: 91/852 cut-off events. [2023-09-01 09:18:21,440 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-09-01 09:18:21,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 925 conditions, 852 events. 91/852 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 3787 event pairs, 0 based on Foata normal form. 0/742 useless extension candidates. Maximal degree in co-relation 804. Up to 20 conditions per place. [2023-09-01 09:18:21,527 INFO L119 LiptonReduction]: Number of co-enabled transitions 461916 [2023-09-01 09:18:35,143 INFO L134 LiptonReduction]: Checked pairs total: 929047 [2023-09-01 09:18:35,143 INFO L136 LiptonReduction]: Total number of compositions: 598 [2023-09-01 09:18:35,145 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:18:35,145 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@27482ae1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:18:35,145 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:18:35,170 INFO L130 PetriNetUnfolder]: 50/266 cut-off events. [2023-09-01 09:18:35,170 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-09-01 09:18:35,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:18:35,170 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:18:35,171 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:18:35,171 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:18:35,171 INFO L85 PathProgramCache]: Analyzing trace with hash -392173397, now seen corresponding path program 1 times [2023-09-01 09:18:35,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:18:35,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605107122] [2023-09-01 09:18:35,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:18:35,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:18:35,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:18:35,187 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:18:35,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:18:35,202 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:18:35,202 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:18:35,203 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:18:35,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 09:18:35,203 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:18:35,203 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:18:35,203 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:18:35,203 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-09-01 09:18:35,315 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:18:35,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 755 places, 825 transitions, 1790 flow [2023-09-01 09:18:35,537 INFO L130 PetriNetUnfolder]: 101/943 cut-off events. [2023-09-01 09:18:35,537 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-09-01 09:18:35,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1029 conditions, 943 events. 101/943 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 4319 event pairs, 0 based on Foata normal form. 0/821 useless extension candidates. Maximal degree in co-relation 905. Up to 22 conditions per place. [2023-09-01 09:18:35,574 INFO L82 GeneralOperation]: Start removeDead. Operand has 755 places, 825 transitions, 1790 flow [2023-09-01 09:18:35,584 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 755 places, 825 transitions, 1790 flow [2023-09-01 09:18:35,584 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:18:35,585 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 755 places, 825 transitions, 1790 flow [2023-09-01 09:18:35,585 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 755 places, 825 transitions, 1790 flow [2023-09-01 09:18:35,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 755 places, 825 transitions, 1790 flow [2023-09-01 09:18:35,844 INFO L130 PetriNetUnfolder]: 101/943 cut-off events. [2023-09-01 09:18:35,844 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-09-01 09:18:35,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1029 conditions, 943 events. 101/943 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 4319 event pairs, 0 based on Foata normal form. 0/821 useless extension candidates. Maximal degree in co-relation 905. Up to 22 conditions per place. [2023-09-01 09:18:35,962 INFO L119 LiptonReduction]: Number of co-enabled transitions 574860 [2023-09-01 09:18:50,558 INFO L134 LiptonReduction]: Checked pairs total: 1167442 [2023-09-01 09:18:50,558 INFO L136 LiptonReduction]: Total number of compositions: 663 [2023-09-01 09:18:50,560 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:18:50,560 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@27482ae1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:18:50,560 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:18:50,596 INFO L130 PetriNetUnfolder]: 57/300 cut-off events. [2023-09-01 09:18:50,596 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-09-01 09:18:50,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:18:50,596 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:18:50,596 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:18:50,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:18:50,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1279378807, now seen corresponding path program 1 times [2023-09-01 09:18:50,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:18:50,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865105133] [2023-09-01 09:18:50,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:18:50,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:18:50,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:18:50,629 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:18:50,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:18:50,645 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:18:50,646 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:18:50,646 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:18:50,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 09:18:50,646 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:18:50,646 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:18:50,647 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:18:50,647 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-09-01 09:18:50,756 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:18:50,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 827 places, 904 transitions, 1973 flow [2023-09-01 09:18:51,076 INFO L130 PetriNetUnfolder]: 111/1034 cut-off events. [2023-09-01 09:18:51,077 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-09-01 09:18:51,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1134 conditions, 1034 events. 111/1034 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 4832 event pairs, 0 based on Foata normal form. 0/900 useless extension candidates. Maximal degree in co-relation 1009. Up to 24 conditions per place. [2023-09-01 09:18:51,118 INFO L82 GeneralOperation]: Start removeDead. Operand has 827 places, 904 transitions, 1973 flow [2023-09-01 09:18:51,129 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 827 places, 904 transitions, 1973 flow [2023-09-01 09:18:51,129 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:18:51,129 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 827 places, 904 transitions, 1973 flow [2023-09-01 09:18:51,129 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 827 places, 904 transitions, 1973 flow [2023-09-01 09:18:51,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 827 places, 904 transitions, 1973 flow [2023-09-01 09:18:51,460 INFO L130 PetriNetUnfolder]: 111/1034 cut-off events. [2023-09-01 09:18:51,460 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-09-01 09:18:51,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1134 conditions, 1034 events. 111/1034 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 4832 event pairs, 0 based on Foata normal form. 0/900 useless extension candidates. Maximal degree in co-relation 1009. Up to 24 conditions per place. [2023-09-01 09:18:51,612 INFO L119 LiptonReduction]: Number of co-enabled transitions 700128 [2023-09-01 09:19:08,636 INFO L134 LiptonReduction]: Checked pairs total: 1457710 [2023-09-01 09:19:08,636 INFO L136 LiptonReduction]: Total number of compositions: 726 [2023-09-01 09:19:08,638 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:19:08,638 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@27482ae1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:19:08,638 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:19:08,676 INFO L130 PetriNetUnfolder]: 64/332 cut-off events. [2023-09-01 09:19:08,676 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-09-01 09:19:08,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:19:08,677 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:19:08,677 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:19:08,678 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:19:08,678 INFO L85 PathProgramCache]: Analyzing trace with hash -2091456884, now seen corresponding path program 1 times [2023-09-01 09:19:08,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:19:08,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609198802] [2023-09-01 09:19:08,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:19:08,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:19:08,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:19:08,720 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:19:08,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:19:08,742 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:19:08,743 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:19:08,743 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:19:08,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-09-01 09:19:08,743 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:19:08,743 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:19:08,743 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:19:08,743 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-09-01 09:19:08,940 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:19:08,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 899 places, 983 transitions, 2158 flow [2023-09-01 09:19:09,290 INFO L130 PetriNetUnfolder]: 121/1125 cut-off events. [2023-09-01 09:19:09,290 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-09-01 09:19:09,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1240 conditions, 1125 events. 121/1125 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 5341 event pairs, 0 based on Foata normal form. 0/979 useless extension candidates. Maximal degree in co-relation 1114. Up to 26 conditions per place. [2023-09-01 09:19:09,345 INFO L82 GeneralOperation]: Start removeDead. Operand has 899 places, 983 transitions, 2158 flow [2023-09-01 09:19:09,359 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 899 places, 983 transitions, 2158 flow [2023-09-01 09:19:09,360 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:19:09,360 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 899 places, 983 transitions, 2158 flow [2023-09-01 09:19:09,360 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 899 places, 983 transitions, 2158 flow [2023-09-01 09:19:09,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 899 places, 983 transitions, 2158 flow [2023-09-01 09:19:09,734 INFO L130 PetriNetUnfolder]: 121/1125 cut-off events. [2023-09-01 09:19:09,734 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-09-01 09:19:09,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1240 conditions, 1125 events. 121/1125 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 5341 event pairs, 0 based on Foata normal form. 0/979 useless extension candidates. Maximal degree in co-relation 1114. Up to 26 conditions per place. [2023-09-01 09:19:09,888 INFO L119 LiptonReduction]: Number of co-enabled transitions 837720 [2023-09-01 09:19:27,919 INFO L134 LiptonReduction]: Checked pairs total: 1744929 [2023-09-01 09:19:27,920 INFO L136 LiptonReduction]: Total number of compositions: 788 [2023-09-01 09:19:27,921 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:19:27,922 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@27482ae1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:19:27,922 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:19:27,968 INFO L130 PetriNetUnfolder]: 70/366 cut-off events. [2023-09-01 09:19:27,969 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-09-01 09:19:27,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:19:27,969 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 09:19:27,969 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:19:27,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:19:27,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1844041229, now seen corresponding path program 1 times [2023-09-01 09:19:27,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:19:27,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352250886] [2023-09-01 09:19:27,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:19:27,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:19:28,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:19:28,010 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:19:28,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:19:28,041 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:19:28,041 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:19:28,041 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:19:28,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 09:19:28,041 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:19:28,044 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:19:28,044 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:19:28,044 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-09-01 09:19:28,169 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:19:28,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 971 places, 1062 transitions, 2345 flow [2023-09-01 09:19:28,583 INFO L130 PetriNetUnfolder]: 131/1216 cut-off events. [2023-09-01 09:19:28,584 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-09-01 09:19:28,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1347 conditions, 1216 events. 131/1216 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 5848 event pairs, 0 based on Foata normal form. 0/1058 useless extension candidates. Maximal degree in co-relation 1220. Up to 28 conditions per place. [2023-09-01 09:19:28,636 INFO L82 GeneralOperation]: Start removeDead. Operand has 971 places, 1062 transitions, 2345 flow [2023-09-01 09:19:28,650 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 971 places, 1062 transitions, 2345 flow [2023-09-01 09:19:28,650 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:19:28,650 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 971 places, 1062 transitions, 2345 flow [2023-09-01 09:19:28,650 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 971 places, 1062 transitions, 2345 flow [2023-09-01 09:19:28,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 971 places, 1062 transitions, 2345 flow [2023-09-01 09:19:29,031 INFO L130 PetriNetUnfolder]: 131/1216 cut-off events. [2023-09-01 09:19:29,031 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-09-01 09:19:29,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1347 conditions, 1216 events. 131/1216 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 5848 event pairs, 0 based on Foata normal form. 0/1058 useless extension candidates. Maximal degree in co-relation 1220. Up to 28 conditions per place. [2023-09-01 09:19:29,337 INFO L119 LiptonReduction]: Number of co-enabled transitions 987636 [2023-09-01 09:19:48,616 INFO L134 LiptonReduction]: Checked pairs total: 2255991 [2023-09-01 09:19:48,616 INFO L136 LiptonReduction]: Total number of compositions: 848 [2023-09-01 09:19:48,618 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:19:48,618 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@27482ae1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:19:48,618 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:19:48,671 INFO L130 PetriNetUnfolder]: 78/404 cut-off events. [2023-09-01 09:19:48,672 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-09-01 09:19:48,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:19:48,672 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 09:19:48,672 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:19:48,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:19:48,672 INFO L85 PathProgramCache]: Analyzing trace with hash -268375454, now seen corresponding path program 1 times [2023-09-01 09:19:48,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:19:48,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121500304] [2023-09-01 09:19:48,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:19:48,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:19:48,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:19:48,695 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:19:48,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:19:48,715 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:19:48,715 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:19:48,715 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:19:48,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-09-01 09:19:48,715 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:19:48,716 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:19:48,716 WARN L233 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:19:48,716 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2023-09-01 09:19:48,849 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:19:48,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1043 places, 1141 transitions, 2534 flow [2023-09-01 09:19:49,294 INFO L130 PetriNetUnfolder]: 141/1307 cut-off events. [2023-09-01 09:19:49,294 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-09-01 09:19:49,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1455 conditions, 1307 events. 141/1307 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 6367 event pairs, 0 based on Foata normal form. 0/1137 useless extension candidates. Maximal degree in co-relation 1327. Up to 30 conditions per place. [2023-09-01 09:19:49,370 INFO L82 GeneralOperation]: Start removeDead. Operand has 1043 places, 1141 transitions, 2534 flow [2023-09-01 09:19:49,388 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1043 places, 1141 transitions, 2534 flow [2023-09-01 09:19:49,388 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:19:49,388 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1043 places, 1141 transitions, 2534 flow [2023-09-01 09:19:49,388 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1043 places, 1141 transitions, 2534 flow [2023-09-01 09:19:49,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1043 places, 1141 transitions, 2534 flow [2023-09-01 09:19:49,837 INFO L130 PetriNetUnfolder]: 141/1307 cut-off events. [2023-09-01 09:19:49,837 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-09-01 09:19:49,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1455 conditions, 1307 events. 141/1307 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 6367 event pairs, 0 based on Foata normal form. 0/1137 useless extension candidates. Maximal degree in co-relation 1327. Up to 30 conditions per place. [2023-09-01 09:19:50,074 INFO L119 LiptonReduction]: Number of co-enabled transitions 1149876 [2023-09-01 09:20:12,061 INFO L134 LiptonReduction]: Checked pairs total: 2617201 [2023-09-01 09:20:12,061 INFO L136 LiptonReduction]: Total number of compositions: 914 [2023-09-01 09:20:12,062 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:20:12,062 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@27482ae1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:20:12,062 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:20:12,120 INFO L130 PetriNetUnfolder]: 84/437 cut-off events. [2023-09-01 09:20:12,120 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-09-01 09:20:12,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:20:12,120 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:20:12,120 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:20:12,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:20:12,120 INFO L85 PathProgramCache]: Analyzing trace with hash 72312746, now seen corresponding path program 1 times [2023-09-01 09:20:12,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:20:12,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157799154] [2023-09-01 09:20:12,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:20:12,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:20:12,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:20:12,149 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:20:12,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:20:12,172 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:20:12,172 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:20:12,172 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:20:12,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-09-01 09:20:12,173 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:20:12,173 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:20:12,173 WARN L233 ceAbstractionStarter]: 14 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:20:12,173 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 15 thread instances. [2023-09-01 09:20:12,325 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:20:12,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1115 places, 1220 transitions, 2725 flow [2023-09-01 09:20:12,923 INFO L130 PetriNetUnfolder]: 151/1398 cut-off events. [2023-09-01 09:20:12,923 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-09-01 09:20:12,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1564 conditions, 1398 events. 151/1398 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 6913 event pairs, 0 based on Foata normal form. 0/1216 useless extension candidates. Maximal degree in co-relation 1435. Up to 32 conditions per place. [2023-09-01 09:20:12,982 INFO L82 GeneralOperation]: Start removeDead. Operand has 1115 places, 1220 transitions, 2725 flow [2023-09-01 09:20:12,997 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1115 places, 1220 transitions, 2725 flow [2023-09-01 09:20:12,998 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:20:12,998 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1115 places, 1220 transitions, 2725 flow [2023-09-01 09:20:12,998 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1115 places, 1220 transitions, 2725 flow [2023-09-01 09:20:12,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1115 places, 1220 transitions, 2725 flow [2023-09-01 09:20:13,497 INFO L130 PetriNetUnfolder]: 151/1398 cut-off events. [2023-09-01 09:20:13,497 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-09-01 09:20:13,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1564 conditions, 1398 events. 151/1398 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 6913 event pairs, 0 based on Foata normal form. 0/1216 useless extension candidates. Maximal degree in co-relation 1435. Up to 32 conditions per place. [2023-09-01 09:20:13,926 INFO L119 LiptonReduction]: Number of co-enabled transitions 1324440 [2023-09-01 09:20:37,038 INFO L134 LiptonReduction]: Checked pairs total: 2975786 [2023-09-01 09:20:37,038 INFO L136 LiptonReduction]: Total number of compositions: 974 [2023-09-01 09:20:37,040 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:20:37,040 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@27482ae1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:20:37,040 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:20:37,134 INFO L130 PetriNetUnfolder]: 91/468 cut-off events. [2023-09-01 09:20:37,134 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-09-01 09:20:37,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:20:37,134 INFO L208 CegarLoopForPetriNet]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:20:37,134 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:20:37,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:20:37,134 INFO L85 PathProgramCache]: Analyzing trace with hash 459114490, now seen corresponding path program 1 times [2023-09-01 09:20:37,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:20:37,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547391410] [2023-09-01 09:20:37,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:20:37,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:20:37,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:20:37,166 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:20:37,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:20:37,193 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:20:37,193 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:20:37,194 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:20:37,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-09-01 09:20:37,195 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:20:37,196 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:20:37,196 WARN L233 ceAbstractionStarter]: 15 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:20:37,196 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 16 thread instances. [2023-09-01 09:20:37,359 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:20:37,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1187 places, 1299 transitions, 2918 flow [2023-09-01 09:20:37,946 INFO L130 PetriNetUnfolder]: 161/1489 cut-off events. [2023-09-01 09:20:37,946 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-09-01 09:20:38,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1674 conditions, 1489 events. 161/1489 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 7400 event pairs, 0 based on Foata normal form. 0/1295 useless extension candidates. Maximal degree in co-relation 1544. Up to 34 conditions per place. [2023-09-01 09:20:38,049 INFO L82 GeneralOperation]: Start removeDead. Operand has 1187 places, 1299 transitions, 2918 flow [2023-09-01 09:20:38,073 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1187 places, 1299 transitions, 2918 flow [2023-09-01 09:20:38,073 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:20:38,073 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1187 places, 1299 transitions, 2918 flow [2023-09-01 09:20:38,073 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1187 places, 1299 transitions, 2918 flow [2023-09-01 09:20:38,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1187 places, 1299 transitions, 2918 flow [2023-09-01 09:20:38,645 INFO L130 PetriNetUnfolder]: 161/1489 cut-off events. [2023-09-01 09:20:38,645 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-09-01 09:20:38,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1674 conditions, 1489 events. 161/1489 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 7400 event pairs, 0 based on Foata normal form. 0/1295 useless extension candidates. Maximal degree in co-relation 1544. Up to 34 conditions per place. [2023-09-01 09:20:38,997 INFO L119 LiptonReduction]: Number of co-enabled transitions 1511328 [2023-09-01 09:21:03,480 INFO L134 LiptonReduction]: Checked pairs total: 3418394 [2023-09-01 09:21:03,480 INFO L136 LiptonReduction]: Total number of compositions: 1043 [2023-09-01 09:21:03,482 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:21:03,482 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@27482ae1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:21:03,482 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:21:03,554 INFO L130 PetriNetUnfolder]: 98/504 cut-off events. [2023-09-01 09:21:03,555 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-09-01 09:21:03,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:21:03,555 INFO L208 CegarLoopForPetriNet]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:21:03,555 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:21:03,555 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:21:03,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1151175113, now seen corresponding path program 1 times [2023-09-01 09:21:03,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:21:03,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932659421] [2023-09-01 09:21:03,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:21:03,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:21:03,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:21:03,581 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:21:03,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:21:03,604 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:21:03,604 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:21:03,605 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:21:03,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-09-01 09:21:03,605 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:21:03,605 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:21:03,605 WARN L233 ceAbstractionStarter]: 16 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:21:03,605 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 17 thread instances. [2023-09-01 09:21:03,747 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:21:03,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1259 places, 1378 transitions, 3113 flow [2023-09-01 09:21:04,566 INFO L130 PetriNetUnfolder]: 171/1580 cut-off events. [2023-09-01 09:21:04,566 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-09-01 09:21:04,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1785 conditions, 1580 events. 171/1580 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 7910 event pairs, 0 based on Foata normal form. 0/1374 useless extension candidates. Maximal degree in co-relation 1654. Up to 36 conditions per place. [2023-09-01 09:21:04,637 INFO L82 GeneralOperation]: Start removeDead. Operand has 1259 places, 1378 transitions, 3113 flow [2023-09-01 09:21:04,655 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1259 places, 1378 transitions, 3113 flow [2023-09-01 09:21:04,655 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:21:04,655 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1259 places, 1378 transitions, 3113 flow [2023-09-01 09:21:04,655 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1259 places, 1378 transitions, 3113 flow [2023-09-01 09:21:04,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1259 places, 1378 transitions, 3113 flow [2023-09-01 09:21:05,284 INFO L130 PetriNetUnfolder]: 171/1580 cut-off events. [2023-09-01 09:21:05,284 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-09-01 09:21:05,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1785 conditions, 1580 events. 171/1580 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 7910 event pairs, 0 based on Foata normal form. 0/1374 useless extension candidates. Maximal degree in co-relation 1654. Up to 36 conditions per place. [2023-09-01 09:21:05,719 INFO L119 LiptonReduction]: Number of co-enabled transitions 1710540 [2023-09-01 09:21:31,490 INFO L134 LiptonReduction]: Checked pairs total: 3860000 [2023-09-01 09:21:31,490 INFO L136 LiptonReduction]: Total number of compositions: 1094 [2023-09-01 09:21:31,492 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:21:31,493 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@27482ae1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:21:31,493 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:21:31,581 INFO L130 PetriNetUnfolder]: 106/539 cut-off events. [2023-09-01 09:21:31,581 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-09-01 09:21:31,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:21:31,581 INFO L208 CegarLoopForPetriNet]: trace histogram [18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:21:31,581 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:21:31,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:21:31,582 INFO L85 PathProgramCache]: Analyzing trace with hash 2044922245, now seen corresponding path program 1 times [2023-09-01 09:21:31,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:21:31,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015525593] [2023-09-01 09:21:31,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:21:31,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:21:31,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:21:31,611 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:21:31,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:21:31,653 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:21:31,653 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:21:31,653 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:21:31,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-09-01 09:21:31,653 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:21:31,654 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:21:31,654 WARN L233 ceAbstractionStarter]: 17 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:21:31,654 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 18 thread instances. [2023-09-01 09:21:31,822 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:21:31,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1331 places, 1457 transitions, 3310 flow [2023-09-01 09:21:32,555 INFO L130 PetriNetUnfolder]: 181/1671 cut-off events. [2023-09-01 09:21:32,555 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-09-01 09:21:32,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1897 conditions, 1671 events. 181/1671 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 8434 event pairs, 0 based on Foata normal form. 0/1453 useless extension candidates. Maximal degree in co-relation 1765. Up to 38 conditions per place. [2023-09-01 09:21:32,676 INFO L82 GeneralOperation]: Start removeDead. Operand has 1331 places, 1457 transitions, 3310 flow [2023-09-01 09:21:32,704 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1331 places, 1457 transitions, 3310 flow [2023-09-01 09:21:32,704 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:21:32,704 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1331 places, 1457 transitions, 3310 flow [2023-09-01 09:21:32,704 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1331 places, 1457 transitions, 3310 flow [2023-09-01 09:21:32,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1331 places, 1457 transitions, 3310 flow [2023-09-01 09:21:33,456 INFO L130 PetriNetUnfolder]: 181/1671 cut-off events. [2023-09-01 09:21:33,457 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-09-01 09:21:33,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1897 conditions, 1671 events. 181/1671 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 8434 event pairs, 0 based on Foata normal form. 0/1453 useless extension candidates. Maximal degree in co-relation 1765. Up to 38 conditions per place. [2023-09-01 09:21:33,827 INFO L119 LiptonReduction]: Number of co-enabled transitions 1922076 [2023-09-01 09:22:01,726 INFO L134 LiptonReduction]: Checked pairs total: 4368552 [2023-09-01 09:22:01,727 INFO L136 LiptonReduction]: Total number of compositions: 1165 [2023-09-01 09:22:01,728 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:22:01,728 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@27482ae1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:22:01,728 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:22:01,830 INFO L130 PetriNetUnfolder]: 113/573 cut-off events. [2023-09-01 09:22:01,830 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-09-01 09:22:01,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:22:01,830 INFO L208 CegarLoopForPetriNet]: trace histogram [19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:22:01,830 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:22:01,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:22:01,830 INFO L85 PathProgramCache]: Analyzing trace with hash -28340825, now seen corresponding path program 1 times [2023-09-01 09:22:01,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:22:01,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957265988] [2023-09-01 09:22:01,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:22:01,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:22:01,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:22:01,866 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:22:01,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:22:01,904 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:22:01,905 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:22:01,905 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:22:01,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-09-01 09:22:01,905 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:22:01,906 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:22:01,906 WARN L233 ceAbstractionStarter]: 18 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:22:01,906 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 19 thread instances. [2023-09-01 09:22:02,084 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:22:02,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1403 places, 1536 transitions, 3509 flow [2023-09-01 09:22:02,998 INFO L130 PetriNetUnfolder]: 191/1762 cut-off events. [2023-09-01 09:22:02,999 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-09-01 09:22:03,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2010 conditions, 1762 events. 191/1762 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 8943 event pairs, 0 based on Foata normal form. 0/1532 useless extension candidates. Maximal degree in co-relation 1877. Up to 40 conditions per place. [2023-09-01 09:22:03,091 INFO L82 GeneralOperation]: Start removeDead. Operand has 1403 places, 1536 transitions, 3509 flow [2023-09-01 09:22:03,114 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1403 places, 1536 transitions, 3509 flow [2023-09-01 09:22:03,114 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:22:03,114 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1403 places, 1536 transitions, 3509 flow [2023-09-01 09:22:03,114 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1403 places, 1536 transitions, 3509 flow [2023-09-01 09:22:03,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1403 places, 1536 transitions, 3509 flow [2023-09-01 09:22:03,890 INFO L130 PetriNetUnfolder]: 191/1762 cut-off events. [2023-09-01 09:22:03,890 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-09-01 09:22:04,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2010 conditions, 1762 events. 191/1762 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 8943 event pairs, 0 based on Foata normal form. 0/1532 useless extension candidates. Maximal degree in co-relation 1877. Up to 40 conditions per place. [2023-09-01 09:22:04,552 INFO L119 LiptonReduction]: Number of co-enabled transitions 2145936 [2023-09-01 09:22:33,830 INFO L134 LiptonReduction]: Checked pairs total: 4909396 [2023-09-01 09:22:33,830 INFO L136 LiptonReduction]: Total number of compositions: 1227 [2023-09-01 09:22:33,831 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:22:33,832 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@27482ae1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:22:33,832 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:22:33,977 INFO L130 PetriNetUnfolder]: 120/608 cut-off events. [2023-09-01 09:22:33,977 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-09-01 09:22:33,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:22:33,977 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:22:33,977 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:22:33,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:22:33,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1576653855, now seen corresponding path program 1 times [2023-09-01 09:22:33,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:22:33,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204819752] [2023-09-01 09:22:33,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:22:33,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:22:34,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:22:34,017 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:22:34,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:22:34,048 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:22:34,048 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:22:34,048 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:22:34,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-09-01 09:22:34,049 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:22:34,050 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:22:34,050 WARN L233 ceAbstractionStarter]: 19 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:22:34,050 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 20 thread instances. [2023-09-01 09:22:34,209 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:22:34,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1475 places, 1615 transitions, 3710 flow [2023-09-01 09:22:35,210 INFO L130 PetriNetUnfolder]: 201/1853 cut-off events. [2023-09-01 09:22:35,210 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-09-01 09:22:35,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2124 conditions, 1853 events. 201/1853 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 9439 event pairs, 0 based on Foata normal form. 0/1611 useless extension candidates. Maximal degree in co-relation 1990. Up to 42 conditions per place. [2023-09-01 09:22:35,311 INFO L82 GeneralOperation]: Start removeDead. Operand has 1475 places, 1615 transitions, 3710 flow [2023-09-01 09:22:35,337 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1475 places, 1615 transitions, 3710 flow [2023-09-01 09:22:35,337 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:22:35,337 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1475 places, 1615 transitions, 3710 flow [2023-09-01 09:22:35,337 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1475 places, 1615 transitions, 3710 flow [2023-09-01 09:22:35,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1475 places, 1615 transitions, 3710 flow [2023-09-01 09:22:36,251 INFO L130 PetriNetUnfolder]: 201/1853 cut-off events. [2023-09-01 09:22:36,251 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-09-01 09:22:36,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2124 conditions, 1853 events. 201/1853 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 9439 event pairs, 0 based on Foata normal form. 0/1611 useless extension candidates. Maximal degree in co-relation 1990. Up to 42 conditions per place. [2023-09-01 09:22:37,045 INFO L119 LiptonReduction]: Number of co-enabled transitions 2382120 [2023-09-01 09:23:07,948 INFO L134 LiptonReduction]: Checked pairs total: 5438150 [2023-09-01 09:23:07,948 INFO L136 LiptonReduction]: Total number of compositions: 1292 [2023-09-01 09:23:07,949 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:23:07,950 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@27482ae1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:23:07,950 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:23:08,076 INFO L130 PetriNetUnfolder]: 126/641 cut-off events. [2023-09-01 09:23:08,076 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-09-01 09:23:08,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:23:08,076 INFO L208 CegarLoopForPetriNet]: trace histogram [21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:23:08,076 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:23:08,077 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:23:08,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1517417906, now seen corresponding path program 1 times [2023-09-01 09:23:08,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:23:08,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399384012] [2023-09-01 09:23:08,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:23:08,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:23:08,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:23:08,115 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:23:08,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:23:08,158 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:23:08,158 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:23:08,159 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:23:08,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-09-01 09:23:08,159 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:23:08,160 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:23:08,160 WARN L233 ceAbstractionStarter]: 20 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:23:08,160 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 21 thread instances. [2023-09-01 09:23:08,381 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:23:08,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1547 places, 1694 transitions, 3913 flow [2023-09-01 09:23:09,472 INFO L130 PetriNetUnfolder]: 211/1944 cut-off events. [2023-09-01 09:23:09,472 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-09-01 09:23:09,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2239 conditions, 1944 events. 211/1944 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 9979 event pairs, 0 based on Foata normal form. 0/1690 useless extension candidates. Maximal degree in co-relation 2104. Up to 44 conditions per place. [2023-09-01 09:23:09,600 INFO L82 GeneralOperation]: Start removeDead. Operand has 1547 places, 1694 transitions, 3913 flow [2023-09-01 09:23:09,631 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1547 places, 1694 transitions, 3913 flow [2023-09-01 09:23:09,631 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:23:09,632 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1547 places, 1694 transitions, 3913 flow [2023-09-01 09:23:09,632 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1547 places, 1694 transitions, 3913 flow [2023-09-01 09:23:09,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1547 places, 1694 transitions, 3913 flow [2023-09-01 09:23:10,673 INFO L130 PetriNetUnfolder]: 211/1944 cut-off events. [2023-09-01 09:23:10,673 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-09-01 09:23:10,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2239 conditions, 1944 events. 211/1944 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 9979 event pairs, 0 based on Foata normal form. 0/1690 useless extension candidates. Maximal degree in co-relation 2104. Up to 44 conditions per place. [2023-09-01 09:23:11,250 INFO L119 LiptonReduction]: Number of co-enabled transitions 2630628 [2023-09-01 09:23:43,396 INFO L134 LiptonReduction]: Checked pairs total: 6023620 [2023-09-01 09:23:43,396 INFO L136 LiptonReduction]: Total number of compositions: 1352 [2023-09-01 09:23:43,397 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:23:43,398 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@27482ae1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:23:43,398 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:23:43,535 INFO L130 PetriNetUnfolder]: 133/677 cut-off events. [2023-09-01 09:23:43,535 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-09-01 09:23:43,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:23:43,535 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:23:43,536 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:23:43,536 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:23:43,536 INFO L85 PathProgramCache]: Analyzing trace with hash 487342399, now seen corresponding path program 1 times [2023-09-01 09:23:43,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:23:43,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770721768] [2023-09-01 09:23:43,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:23:43,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:23:43,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:23:43,573 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:23:43,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:23:43,607 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:23:43,607 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:23:43,608 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:23:43,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-09-01 09:23:43,608 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:23:43,608 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:23:43,608 WARN L233 ceAbstractionStarter]: 21 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:23:43,608 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 22 thread instances. [2023-09-01 09:23:43,790 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:23:43,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1619 places, 1773 transitions, 4118 flow [2023-09-01 09:23:44,980 INFO L130 PetriNetUnfolder]: 221/2035 cut-off events. [2023-09-01 09:23:44,980 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-09-01 09:23:45,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2355 conditions, 2035 events. 221/2035 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 10464 event pairs, 0 based on Foata normal form. 0/1769 useless extension candidates. Maximal degree in co-relation 2219. Up to 46 conditions per place. [2023-09-01 09:23:45,197 INFO L82 GeneralOperation]: Start removeDead. Operand has 1619 places, 1773 transitions, 4118 flow [2023-09-01 09:23:45,248 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1619 places, 1773 transitions, 4118 flow [2023-09-01 09:23:45,249 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:23:45,249 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1619 places, 1773 transitions, 4118 flow [2023-09-01 09:23:45,249 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1619 places, 1773 transitions, 4118 flow [2023-09-01 09:23:45,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1619 places, 1773 transitions, 4118 flow [2023-09-01 09:23:46,496 INFO L130 PetriNetUnfolder]: 221/2035 cut-off events. [2023-09-01 09:23:46,497 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-09-01 09:23:46,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2355 conditions, 2035 events. 221/2035 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 10464 event pairs, 0 based on Foata normal form. 0/1769 useless extension candidates. Maximal degree in co-relation 2219. Up to 46 conditions per place. [2023-09-01 09:23:47,274 INFO L119 LiptonReduction]: Number of co-enabled transitions 2891460 [2023-09-01 09:24:21,589 INFO L134 LiptonReduction]: Checked pairs total: 5961511 [2023-09-01 09:24:21,589 INFO L136 LiptonReduction]: Total number of compositions: 1418 [2023-09-01 09:24:21,590 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:24:21,590 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@27482ae1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:24:21,590 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:24:21,737 INFO L130 PetriNetUnfolder]: 141/711 cut-off events. [2023-09-01 09:24:21,737 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-09-01 09:24:21,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:24:21,738 INFO L208 CegarLoopForPetriNet]: trace histogram [23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:24:21,738 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:24:21,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:24:21,738 INFO L85 PathProgramCache]: Analyzing trace with hash -232205019, now seen corresponding path program 1 times [2023-09-01 09:24:21,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:24:21,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494512457] [2023-09-01 09:24:21,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:24:21,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:24:21,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:24:21,780 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:24:21,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:24:21,815 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:24:21,816 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:24:21,816 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:24:21,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-09-01 09:24:21,816 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:24:21,816 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:24:21,816 WARN L233 ceAbstractionStarter]: 22 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:24:21,816 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 23 thread instances. [2023-09-01 09:24:22,021 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:24:22,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1691 places, 1852 transitions, 4325 flow [2023-09-01 09:24:23,380 INFO L130 PetriNetUnfolder]: 231/2126 cut-off events. [2023-09-01 09:24:23,380 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-09-01 09:24:23,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2472 conditions, 2126 events. 231/2126 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 10988 event pairs, 0 based on Foata normal form. 0/1848 useless extension candidates. Maximal degree in co-relation 2335. Up to 48 conditions per place. [2023-09-01 09:24:23,522 INFO L82 GeneralOperation]: Start removeDead. Operand has 1691 places, 1852 transitions, 4325 flow [2023-09-01 09:24:23,556 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1691 places, 1852 transitions, 4325 flow [2023-09-01 09:24:23,556 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:24:23,556 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1691 places, 1852 transitions, 4325 flow [2023-09-01 09:24:23,556 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1691 places, 1852 transitions, 4325 flow [2023-09-01 09:24:23,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1691 places, 1852 transitions, 4325 flow [2023-09-01 09:24:24,988 INFO L130 PetriNetUnfolder]: 231/2126 cut-off events. [2023-09-01 09:24:24,988 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-09-01 09:24:25,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2472 conditions, 2126 events. 231/2126 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 10988 event pairs, 0 based on Foata normal form. 0/1848 useless extension candidates. Maximal degree in co-relation 2335. Up to 48 conditions per place. [2023-09-01 09:24:25,610 INFO L119 LiptonReduction]: Number of co-enabled transitions 3164616 [2023-09-01 09:25:02,065 INFO L134 LiptonReduction]: Checked pairs total: 6441936 [2023-09-01 09:25:02,065 INFO L136 LiptonReduction]: Total number of compositions: 1478 [2023-09-01 09:25:02,067 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:25:02,067 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@27482ae1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:25:02,067 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:25:02,224 INFO L130 PetriNetUnfolder]: 147/741 cut-off events. [2023-09-01 09:25:02,224 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-09-01 09:25:02,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:25:02,224 INFO L208 CegarLoopForPetriNet]: trace histogram [24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:25:02,224 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:25:02,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:25:02,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1237637143, now seen corresponding path program 1 times [2023-09-01 09:25:02,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:25:02,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118326145] [2023-09-01 09:25:02,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:25:02,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:25:02,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:25:02,267 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:25:02,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:25:02,308 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:25:02,309 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:25:02,309 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:25:02,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-09-01 09:25:02,309 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:25:02,309 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:25:02,309 WARN L233 ceAbstractionStarter]: 23 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:25:02,309 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 24 thread instances. [2023-09-01 09:25:02,501 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:25:02,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1763 places, 1931 transitions, 4534 flow [2023-09-01 09:25:04,069 INFO L130 PetriNetUnfolder]: 241/2217 cut-off events. [2023-09-01 09:25:04,070 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-09-01 09:25:04,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2590 conditions, 2217 events. 241/2217 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 11496 event pairs, 0 based on Foata normal form. 0/1927 useless extension candidates. Maximal degree in co-relation 2452. Up to 50 conditions per place. [2023-09-01 09:25:04,258 INFO L82 GeneralOperation]: Start removeDead. Operand has 1763 places, 1931 transitions, 4534 flow [2023-09-01 09:25:04,303 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1763 places, 1931 transitions, 4534 flow [2023-09-01 09:25:04,303 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:25:04,303 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1763 places, 1931 transitions, 4534 flow [2023-09-01 09:25:04,304 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1763 places, 1931 transitions, 4534 flow [2023-09-01 09:25:04,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1763 places, 1931 transitions, 4534 flow [2023-09-01 09:25:05,869 INFO L130 PetriNetUnfolder]: 241/2217 cut-off events. [2023-09-01 09:25:05,870 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-09-01 09:25:06,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2590 conditions, 2217 events. 241/2217 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 11496 event pairs, 0 based on Foata normal form. 0/1927 useless extension candidates. Maximal degree in co-relation 2452. Up to 50 conditions per place. [2023-09-01 09:25:06,623 INFO L119 LiptonReduction]: Number of co-enabled transitions 3450096 [2023-09-01 09:25:44,341 INFO L134 LiptonReduction]: Checked pairs total: 7116348 [2023-09-01 09:25:44,341 INFO L136 LiptonReduction]: Total number of compositions: 1545 [2023-09-01 09:25:44,342 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:25:44,343 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@27482ae1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:25:44,343 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:25:44,514 INFO L130 PetriNetUnfolder]: 155/777 cut-off events. [2023-09-01 09:25:44,514 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-09-01 09:25:44,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:25:44,515 INFO L208 CegarLoopForPetriNet]: trace histogram [25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:25:44,515 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:25:44,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:25:44,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1713990933, now seen corresponding path program 1 times [2023-09-01 09:25:44,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:25:44,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343363916] [2023-09-01 09:25:44,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:25:44,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:25:44,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:25:44,559 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:25:44,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:25:44,598 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:25:44,598 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:25:44,598 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:25:44,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-09-01 09:25:44,598 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:25:44,599 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:25:44,599 WARN L233 ceAbstractionStarter]: 24 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:25:44,599 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 25 thread instances. [2023-09-01 09:25:44,833 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:25:44,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1835 places, 2010 transitions, 4745 flow [2023-09-01 09:25:46,486 INFO L130 PetriNetUnfolder]: 251/2308 cut-off events. [2023-09-01 09:25:46,486 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-09-01 09:25:46,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2709 conditions, 2308 events. 251/2308 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 11993 event pairs, 0 based on Foata normal form. 0/2006 useless extension candidates. Maximal degree in co-relation 2570. Up to 52 conditions per place. [2023-09-01 09:25:46,656 INFO L82 GeneralOperation]: Start removeDead. Operand has 1835 places, 2010 transitions, 4745 flow [2023-09-01 09:25:46,694 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1835 places, 2010 transitions, 4745 flow [2023-09-01 09:25:46,694 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:25:46,695 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1835 places, 2010 transitions, 4745 flow [2023-09-01 09:25:46,695 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1835 places, 2010 transitions, 4745 flow [2023-09-01 09:25:46,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1835 places, 2010 transitions, 4745 flow [2023-09-01 09:25:48,177 INFO L130 PetriNetUnfolder]: 251/2308 cut-off events. [2023-09-01 09:25:48,177 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-09-01 09:25:48,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2709 conditions, 2308 events. 251/2308 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 11993 event pairs, 0 based on Foata normal form. 0/2006 useless extension candidates. Maximal degree in co-relation 2570. Up to 52 conditions per place. [2023-09-01 09:25:49,055 INFO L119 LiptonReduction]: Number of co-enabled transitions 3747900 [2023-09-01 09:26:29,122 INFO L134 LiptonReduction]: Checked pairs total: 7669208 [2023-09-01 09:26:29,122 INFO L136 LiptonReduction]: Total number of compositions: 1604 [2023-09-01 09:26:29,123 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:26:29,124 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@27482ae1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:26:29,124 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:26:29,310 INFO L130 PetriNetUnfolder]: 161/811 cut-off events. [2023-09-01 09:26:29,311 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-09-01 09:26:29,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:26:29,311 INFO L208 CegarLoopForPetriNet]: trace histogram [26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:26:29,311 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:26:29,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:26:29,311 INFO L85 PathProgramCache]: Analyzing trace with hash 782955840, now seen corresponding path program 1 times [2023-09-01 09:26:29,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:26:29,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164561289] [2023-09-01 09:26:29,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:26:29,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:26:29,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:26:29,367 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:26:29,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:26:29,412 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:26:29,412 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:26:29,412 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:26:29,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-09-01 09:26:29,413 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:26:29,413 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:26:29,413 WARN L233 ceAbstractionStarter]: 25 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:26:29,413 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 26 thread instances. [2023-09-01 09:26:29,620 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:26:29,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1907 places, 2089 transitions, 4958 flow [2023-09-01 09:26:31,333 INFO L130 PetriNetUnfolder]: 261/2399 cut-off events. [2023-09-01 09:26:31,333 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-09-01 09:26:31,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2829 conditions, 2399 events. 261/2399 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 12492 event pairs, 0 based on Foata normal form. 0/2085 useless extension candidates. Maximal degree in co-relation 2689. Up to 54 conditions per place. [2023-09-01 09:26:31,518 INFO L82 GeneralOperation]: Start removeDead. Operand has 1907 places, 2089 transitions, 4958 flow [2023-09-01 09:26:31,560 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1907 places, 2089 transitions, 4958 flow [2023-09-01 09:26:31,560 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:26:31,561 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1907 places, 2089 transitions, 4958 flow [2023-09-01 09:26:31,561 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1907 places, 2089 transitions, 4958 flow [2023-09-01 09:26:31,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1907 places, 2089 transitions, 4958 flow [2023-09-01 09:26:33,314 INFO L130 PetriNetUnfolder]: 261/2399 cut-off events. [2023-09-01 09:26:33,314 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-09-01 09:26:33,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2829 conditions, 2399 events. 261/2399 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 12492 event pairs, 0 based on Foata normal form. 0/2085 useless extension candidates. Maximal degree in co-relation 2689. Up to 54 conditions per place. [2023-09-01 09:26:34,135 INFO L119 LiptonReduction]: Number of co-enabled transitions 4058028 [2023-09-01 09:27:16,763 INFO L134 LiptonReduction]: Checked pairs total: 9032144 [2023-09-01 09:27:16,763 INFO L136 LiptonReduction]: Total number of compositions: 1674 [2023-09-01 09:27:16,765 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:27:16,765 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@27482ae1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:27:16,765 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:27:16,966 INFO L130 PetriNetUnfolder]: 168/844 cut-off events. [2023-09-01 09:27:16,967 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-09-01 09:27:16,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:27:16,967 INFO L208 CegarLoopForPetriNet]: trace histogram [27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:27:16,967 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:27:16,967 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:27:16,967 INFO L85 PathProgramCache]: Analyzing trace with hash -376605358, now seen corresponding path program 1 times [2023-09-01 09:27:16,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:27:16,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875179237] [2023-09-01 09:27:16,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:27:16,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:27:17,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:27:17,021 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:27:17,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:27:17,065 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:27:17,066 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:27:17,066 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:27:17,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-09-01 09:27:17,066 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:27:17,066 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:27:17,066 WARN L233 ceAbstractionStarter]: 26 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:27:17,067 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 27 thread instances. [2023-09-01 09:27:17,286 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:27:17,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1979 places, 2168 transitions, 5173 flow [2023-09-01 09:27:19,181 INFO L130 PetriNetUnfolder]: 271/2490 cut-off events. [2023-09-01 09:27:19,181 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-09-01 09:27:19,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2950 conditions, 2490 events. 271/2490 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 13032 event pairs, 0 based on Foata normal form. 0/2164 useless extension candidates. Maximal degree in co-relation 2809. Up to 56 conditions per place. [2023-09-01 09:27:19,374 INFO L82 GeneralOperation]: Start removeDead. Operand has 1979 places, 2168 transitions, 5173 flow [2023-09-01 09:27:19,418 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1979 places, 2168 transitions, 5173 flow [2023-09-01 09:27:19,418 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:27:19,418 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1979 places, 2168 transitions, 5173 flow [2023-09-01 09:27:19,418 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1979 places, 2168 transitions, 5173 flow [2023-09-01 09:27:19,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1979 places, 2168 transitions, 5173 flow [2023-09-01 09:27:21,147 INFO L130 PetriNetUnfolder]: 271/2490 cut-off events. [2023-09-01 09:27:21,147 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-09-01 09:27:21,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2950 conditions, 2490 events. 271/2490 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 13032 event pairs, 0 based on Foata normal form. 0/2164 useless extension candidates. Maximal degree in co-relation 2809. Up to 56 conditions per place. [2023-09-01 09:27:22,281 INFO L119 LiptonReduction]: Number of co-enabled transitions 4380480 [2023-09-01 09:28:06,148 INFO L134 LiptonReduction]: Checked pairs total: 9078722 [2023-09-01 09:28:06,148 INFO L136 LiptonReduction]: Total number of compositions: 1730 [2023-09-01 09:28:06,149 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:28:06,150 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@27482ae1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:28:06,150 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:28:06,403 INFO L130 PetriNetUnfolder]: 176/878 cut-off events. [2023-09-01 09:28:06,403 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-09-01 09:28:06,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:28:06,404 INFO L208 CegarLoopForPetriNet]: trace histogram [28, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:28:06,404 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:28:06,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:28:06,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1268315341, now seen corresponding path program 1 times [2023-09-01 09:28:06,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:28:06,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348262738] [2023-09-01 09:28:06,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:28:06,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:28:06,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:06,461 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:28:06,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:06,511 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:28:06,512 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:28:06,512 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:28:06,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-09-01 09:28:06,512 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:28:06,512 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:28:06,512 WARN L233 ceAbstractionStarter]: 27 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:28:06,512 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 28 thread instances. [2023-09-01 09:28:06,824 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:28:06,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2051 places, 2247 transitions, 5390 flow [2023-09-01 09:28:08,790 INFO L130 PetriNetUnfolder]: 281/2581 cut-off events. [2023-09-01 09:28:08,790 INFO L131 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2023-09-01 09:28:09,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3072 conditions, 2581 events. 281/2581 cut-off events. For 4032/4032 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 13541 event pairs, 0 based on Foata normal form. 0/2243 useless extension candidates. Maximal degree in co-relation 2930. Up to 58 conditions per place. [2023-09-01 09:28:09,026 INFO L82 GeneralOperation]: Start removeDead. Operand has 2051 places, 2247 transitions, 5390 flow [2023-09-01 09:28:09,081 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2051 places, 2247 transitions, 5390 flow [2023-09-01 09:28:09,082 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:28:09,082 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2051 places, 2247 transitions, 5390 flow [2023-09-01 09:28:09,082 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2051 places, 2247 transitions, 5390 flow [2023-09-01 09:28:09,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2051 places, 2247 transitions, 5390 flow [2023-09-01 09:28:11,061 INFO L130 PetriNetUnfolder]: 281/2581 cut-off events. [2023-09-01 09:28:11,061 INFO L131 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2023-09-01 09:28:11,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3072 conditions, 2581 events. 281/2581 cut-off events. For 4032/4032 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 13541 event pairs, 0 based on Foata normal form. 0/2243 useless extension candidates. Maximal degree in co-relation 2930. Up to 58 conditions per place. [2023-09-01 09:28:12,183 INFO L119 LiptonReduction]: Number of co-enabled transitions 4715256 [2023-09-01 09:28:59,152 INFO L134 LiptonReduction]: Checked pairs total: 9716157 [2023-09-01 09:28:59,152 INFO L136 LiptonReduction]: Total number of compositions: 1797 [2023-09-01 09:28:59,154 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:28:59,154 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@27482ae1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:28:59,154 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:28:59,457 INFO L130 PetriNetUnfolder]: 182/911 cut-off events. [2023-09-01 09:28:59,458 INFO L131 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2023-09-01 09:28:59,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:28:59,458 INFO L208 CegarLoopForPetriNet]: trace histogram [29, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:28:59,458 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:28:59,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:28:59,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1730777906, now seen corresponding path program 1 times [2023-09-01 09:28:59,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:28:59,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872064008] [2023-09-01 09:28:59,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:28:59,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:28:59,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:59,530 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:28:59,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:28:59,600 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:28:59,600 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:28:59,600 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:28:59,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-09-01 09:28:59,601 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:28:59,601 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:28:59,601 WARN L233 ceAbstractionStarter]: 28 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:28:59,601 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 29 thread instances. [2023-09-01 09:28:59,869 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:28:59,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2123 places, 2326 transitions, 5609 flow [2023-09-01 09:29:02,109 INFO L130 PetriNetUnfolder]: 291/2672 cut-off events. [2023-09-01 09:29:02,109 INFO L131 PetriNetUnfolder]: For 4466/4466 co-relation queries the response was YES. [2023-09-01 09:29:02,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3195 conditions, 2672 events. 291/2672 cut-off events. For 4466/4466 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 14050 event pairs, 0 based on Foata normal form. 0/2322 useless extension candidates. Maximal degree in co-relation 3052. Up to 60 conditions per place. [2023-09-01 09:29:02,354 INFO L82 GeneralOperation]: Start removeDead. Operand has 2123 places, 2326 transitions, 5609 flow [2023-09-01 09:29:02,493 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2123 places, 2326 transitions, 5609 flow [2023-09-01 09:29:02,494 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:29:02,494 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2123 places, 2326 transitions, 5609 flow [2023-09-01 09:29:02,494 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2123 places, 2326 transitions, 5609 flow [2023-09-01 09:29:02,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2123 places, 2326 transitions, 5609 flow [2023-09-01 09:29:04,619 INFO L130 PetriNetUnfolder]: 291/2672 cut-off events. [2023-09-01 09:29:04,620 INFO L131 PetriNetUnfolder]: For 4466/4466 co-relation queries the response was YES. [2023-09-01 09:29:04,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3195 conditions, 2672 events. 291/2672 cut-off events. For 4466/4466 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 14050 event pairs, 0 based on Foata normal form. 0/2322 useless extension candidates. Maximal degree in co-relation 3052. Up to 60 conditions per place. Killed by 15