./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/04_incdec_cas.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/04_incdec_cas.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 a025fe4ca65874bde9a09e6a2d9fa9eceda581ed1bc5b23e0ff5285795ed115b --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 09:04:43,447 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 09:04:43,449 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 09:04:43,490 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 09:04:43,492 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 09:04:43,495 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 09:04:43,497 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 09:04:43,499 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 09:04:43,501 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 09:04:43,505 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 09:04:43,506 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 09:04:43,509 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 09:04:43,509 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 09:04:43,511 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 09:04:43,512 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 09:04:43,517 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 09:04:43,517 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 09:04:43,519 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 09:04:43,520 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 09:04:43,524 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 09:04:43,525 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 09:04:43,526 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 09:04:43,527 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 09:04:43,528 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 09:04:43,534 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 09:04:43,535 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 09:04:43,535 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 09:04:43,537 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 09:04:43,537 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 09:04:43,538 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 09:04:43,538 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 09:04:43,544 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 09:04:43,546 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 09:04:43,546 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 09:04:43,547 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 09:04:43,547 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 09:04:43,548 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 09:04:43,548 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 09:04:43,548 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 09:04:43,549 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 09:04:43,550 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 09:04:43,551 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 09:04:43,586 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 09:04:43,586 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 09:04:43,587 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 09:04:43,588 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 09:04:43,588 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 09:04:43,589 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 09:04:43,589 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 09:04:43,589 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 09:04:43,589 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 09:04:43,590 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 09:04:43,590 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 09:04:43,591 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 09:04:43,591 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 09:04:43,591 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 09:04:43,591 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 09:04:43,591 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 09:04:43,592 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 09:04:43,592 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 09:04:43,592 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 09:04:43,592 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 09:04:43,592 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 09:04:43,593 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 09:04:43,593 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 09:04:43,593 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 09:04:43,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 09:04:43,593 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 09:04:43,594 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 09:04:43,594 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 09:04:43,594 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 09:04:43,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 09:04:43,594 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 09:04:43,594 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 09:04:43,595 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 09:04:43,595 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 09:04:43,595 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 09:04:43,595 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a025fe4ca65874bde9a09e6a2d9fa9eceda581ed1bc5b23e0ff5285795ed115b Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 09:04:43,892 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 09:04:43,910 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 09:04:43,912 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 09:04:43,913 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 09:04:43,913 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 09:04:43,914 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/04_incdec_cas.i [2023-09-01 09:04:44,943 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 09:04:45,223 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 09:04:45,223 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/04_incdec_cas.i [2023-09-01 09:04:45,243 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a62ef84d/81a02bfc76c64b0eb2b5aa101fab0884/FLAG806fcc66e [2023-09-01 09:04:45,256 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a62ef84d/81a02bfc76c64b0eb2b5aa101fab0884 [2023-09-01 09:04:45,258 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 09:04:45,259 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 09:04:45,260 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 09:04:45,260 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 09:04:45,263 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 09:04:45,263 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 09:04:45" (1/1) ... [2023-09-01 09:04:45,264 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@722ff422 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:04:45, skipping insertion in model container [2023-09-01 09:04:45,264 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 09:04:45" (1/1) ... [2023-09-01 09:04:45,269 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 09:04:45,306 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 09:04:45,629 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/04_incdec_cas.i[30285,30298] [2023-09-01 09:04:45,638 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/04_incdec_cas.i[30729,30742] [2023-09-01 09:04:45,647 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 09:04:45,655 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 09:04:45,692 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/04_incdec_cas.i[30285,30298] [2023-09-01 09:04:45,698 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/04_incdec_cas.i[30729,30742] [2023-09-01 09:04:45,703 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 09:04:45,764 INFO L208 MainTranslator]: Completed translation [2023-09-01 09:04:45,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:04:45 WrapperNode [2023-09-01 09:04:45,766 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 09:04:45,792 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 09:04:45,792 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 09:04:45,792 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 09:04:45,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:04:45" (1/1) ... [2023-09-01 09:04:45,833 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:04:45" (1/1) ... [2023-09-01 09:04:45,862 INFO L138 Inliner]: procedures = 172, calls = 43, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 159 [2023-09-01 09:04:45,863 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 09:04:45,863 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 09:04:45,864 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 09:04:45,864 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 09:04:45,872 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:04:45" (1/1) ... [2023-09-01 09:04:45,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:04:45" (1/1) ... [2023-09-01 09:04:45,890 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:04:45" (1/1) ... [2023-09-01 09:04:45,890 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:04:45" (1/1) ... [2023-09-01 09:04:45,895 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:04:45" (1/1) ... [2023-09-01 09:04:45,905 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:04:45" (1/1) ... [2023-09-01 09:04:45,914 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:04:45" (1/1) ... [2023-09-01 09:04:45,915 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:04:45" (1/1) ... [2023-09-01 09:04:45,917 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 09:04:45,918 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 09:04:45,918 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 09:04:45,918 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 09:04:45,919 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:04:45" (1/1) ... [2023-09-01 09:04:45,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 09:04:45,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 09:04:45,954 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 09:04:45,979 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 09:04:45,995 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 09:04:45,996 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-09-01 09:04:45,997 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-09-01 09:04:45,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 09:04:45,997 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 09:04:45,998 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 09:04:45,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 09:04:45,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 09:04:45,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 09:04:45,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 09:04:45,999 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 09:04:46,137 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 09:04:46,139 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 09:04:46,402 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 09:04:46,600 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 09:04:46,600 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-09-01 09:04:46,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 09:04:46 BoogieIcfgContainer [2023-09-01 09:04:46,602 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 09:04:46,603 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 09:04:46,603 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 09:04:46,606 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 09:04:46,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 09:04:45" (1/3) ... [2023-09-01 09:04:46,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@133e34cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 09:04:46, skipping insertion in model container [2023-09-01 09:04:46,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:04:45" (2/3) ... [2023-09-01 09:04:46,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@133e34cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 09:04:46, skipping insertion in model container [2023-09-01 09:04:46,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 09:04:46" (3/3) ... [2023-09-01 09:04:46,607 INFO L112 eAbstractionObserver]: Analyzing ICFG 04_incdec_cas.i [2023-09-01 09:04:46,616 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 09:04:46,624 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 09:04:46,625 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-09-01 09:04:46,625 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 09:04:46,706 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:04:46,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 98 transitions, 201 flow [2023-09-01 09:04:46,811 INFO L130 PetriNetUnfolder]: 9/108 cut-off events. [2023-09-01 09:04:46,811 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 09:04:46,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 108 events. 9/108 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 219 event pairs, 0 based on Foata normal form. 0/95 useless extension candidates. Maximal degree in co-relation 77. Up to 4 conditions per place. [2023-09-01 09:04:46,816 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 98 transitions, 201 flow [2023-09-01 09:04:46,819 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 98 transitions, 201 flow [2023-09-01 09:04:46,826 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:04:46,834 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 93 places, 98 transitions, 201 flow [2023-09-01 09:04:46,837 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 93 places, 98 transitions, 201 flow [2023-09-01 09:04:46,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 98 transitions, 201 flow [2023-09-01 09:04:46,857 INFO L130 PetriNetUnfolder]: 9/108 cut-off events. [2023-09-01 09:04:46,858 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 09:04:46,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 108 events. 9/108 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 219 event pairs, 0 based on Foata normal form. 0/95 useless extension candidates. Maximal degree in co-relation 77. Up to 4 conditions per place. [2023-09-01 09:04:46,860 INFO L119 LiptonReduction]: Number of co-enabled transitions 1690 [2023-09-01 09:04:49,921 INFO L134 LiptonReduction]: Checked pairs total: 2354 [2023-09-01 09:04:49,921 INFO L136 LiptonReduction]: Total number of compositions: 84 [2023-09-01 09:04:49,931 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:04:49,936 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;@13624364, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:04:49,937 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:04:49,941 INFO L130 PetriNetUnfolder]: 1/15 cut-off events. [2023-09-01 09:04:49,941 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 09:04:49,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:04:49,942 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-09-01 09:04:49,942 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:04:49,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:04:49,946 INFO L85 PathProgramCache]: Analyzing trace with hash 147020590, now seen corresponding path program 1 times [2023-09-01 09:04:49,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:04:49,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898168840] [2023-09-01 09:04:49,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:04:49,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:04:50,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:04:50,041 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:04:50,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:04:50,071 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:04:50,072 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:04:50,073 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:04:50,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 09:04:50,075 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:04:50,077 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:04:50,078 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:04:50,078 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-09-01 09:04:50,132 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:04:50,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 164 transitions, 340 flow [2023-09-01 09:04:50,165 INFO L130 PetriNetUnfolder]: 17/186 cut-off events. [2023-09-01 09:04:50,166 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 09:04:50,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 186 events. 17/186 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 590 event pairs, 0 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 142. Up to 6 conditions per place. [2023-09-01 09:04:50,168 INFO L82 GeneralOperation]: Start removeDead. Operand has 154 places, 164 transitions, 340 flow [2023-09-01 09:04:50,170 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 164 transitions, 340 flow [2023-09-01 09:04:50,170 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:04:50,170 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 154 places, 164 transitions, 340 flow [2023-09-01 09:04:50,170 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 154 places, 164 transitions, 340 flow [2023-09-01 09:04:50,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 164 transitions, 340 flow [2023-09-01 09:04:50,203 INFO L130 PetriNetUnfolder]: 17/186 cut-off events. [2023-09-01 09:04:50,203 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 09:04:50,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 186 events. 17/186 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 590 event pairs, 0 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 142. Up to 6 conditions per place. [2023-09-01 09:04:50,210 INFO L119 LiptonReduction]: Number of co-enabled transitions 11960 [2023-09-01 09:04:54,351 INFO L134 LiptonReduction]: Checked pairs total: 17804 [2023-09-01 09:04:54,351 INFO L136 LiptonReduction]: Total number of compositions: 142 [2023-09-01 09:04:54,353 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:04:54,354 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;@13624364, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:04:54,354 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:04:54,361 INFO L130 PetriNetUnfolder]: 14/57 cut-off events. [2023-09-01 09:04:54,361 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 09:04:54,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:04:54,362 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-09-01 09:04:54,362 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:04:54,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:04:54,363 INFO L85 PathProgramCache]: Analyzing trace with hash -411397135, now seen corresponding path program 1 times [2023-09-01 09:04:54,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:04:54,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061722414] [2023-09-01 09:04:54,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:04:54,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:04:54,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:04:54,393 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:04:54,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:04:54,418 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:04:54,419 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:04:54,419 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:04:54,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 09:04:54,419 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:04:54,420 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:04:54,420 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:04:54,420 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-09-01 09:04:54,508 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:04:54,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 215 places, 230 transitions, 481 flow [2023-09-01 09:04:54,575 INFO L130 PetriNetUnfolder]: 25/264 cut-off events. [2023-09-01 09:04:54,575 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 09:04:54,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280 conditions, 264 events. 25/264 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1004 event pairs, 0 based on Foata normal form. 0/229 useless extension candidates. Maximal degree in co-relation 207. Up to 8 conditions per place. [2023-09-01 09:04:54,578 INFO L82 GeneralOperation]: Start removeDead. Operand has 215 places, 230 transitions, 481 flow [2023-09-01 09:04:54,583 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 215 places, 230 transitions, 481 flow [2023-09-01 09:04:54,583 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:04:54,583 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 215 places, 230 transitions, 481 flow [2023-09-01 09:04:54,584 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 215 places, 230 transitions, 481 flow [2023-09-01 09:04:54,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 215 places, 230 transitions, 481 flow [2023-09-01 09:04:54,614 INFO L130 PetriNetUnfolder]: 25/264 cut-off events. [2023-09-01 09:04:54,614 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 09:04:54,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280 conditions, 264 events. 25/264 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1004 event pairs, 0 based on Foata normal form. 0/229 useless extension candidates. Maximal degree in co-relation 207. Up to 8 conditions per place. [2023-09-01 09:04:54,629 INFO L119 LiptonReduction]: Number of co-enabled transitions 30810 [2023-09-01 09:05:00,276 INFO L134 LiptonReduction]: Checked pairs total: 46397 [2023-09-01 09:05:00,276 INFO L136 LiptonReduction]: Total number of compositions: 198 [2023-09-01 09:05:00,278 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:05:00,279 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;@13624364, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:05:00,279 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:05:00,287 INFO L130 PetriNetUnfolder]: 21/84 cut-off events. [2023-09-01 09:05:00,288 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 09:05:00,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:05:00,288 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-09-01 09:05:00,288 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:05:00,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:05:00,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1335470231, now seen corresponding path program 1 times [2023-09-01 09:05:00,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:05:00,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871178916] [2023-09-01 09:05:00,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:05:00,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:05:00,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:05:00,311 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:05:00,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:05:00,331 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:05:00,332 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:05:00,332 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:05:00,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 09:05:00,332 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:05:00,333 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:05:00,333 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:05:00,333 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-09-01 09:05:00,419 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:05:00,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 276 places, 296 transitions, 624 flow [2023-09-01 09:05:00,472 INFO L130 PetriNetUnfolder]: 33/342 cut-off events. [2023-09-01 09:05:00,473 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-09-01 09:05:00,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 365 conditions, 342 events. 33/342 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1412 event pairs, 0 based on Foata normal form. 0/296 useless extension candidates. Maximal degree in co-relation 272. Up to 10 conditions per place. [2023-09-01 09:05:00,477 INFO L82 GeneralOperation]: Start removeDead. Operand has 276 places, 296 transitions, 624 flow [2023-09-01 09:05:00,481 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 276 places, 296 transitions, 624 flow [2023-09-01 09:05:00,481 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:05:00,481 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 276 places, 296 transitions, 624 flow [2023-09-01 09:05:00,482 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 276 places, 296 transitions, 624 flow [2023-09-01 09:05:00,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 276 places, 296 transitions, 624 flow [2023-09-01 09:05:00,529 INFO L130 PetriNetUnfolder]: 33/342 cut-off events. [2023-09-01 09:05:00,529 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-09-01 09:05:00,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 365 conditions, 342 events. 33/342 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1412 event pairs, 0 based on Foata normal form. 0/296 useless extension candidates. Maximal degree in co-relation 272. Up to 10 conditions per place. [2023-09-01 09:05:00,550 INFO L119 LiptonReduction]: Number of co-enabled transitions 58240 [2023-09-01 09:05:07,465 INFO L134 LiptonReduction]: Checked pairs total: 90591 [2023-09-01 09:05:07,465 INFO L136 LiptonReduction]: Total number of compositions: 251 [2023-09-01 09:05:07,470 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:05:07,471 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;@13624364, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:05:07,471 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:05:07,485 INFO L130 PetriNetUnfolder]: 28/107 cut-off events. [2023-09-01 09:05:07,486 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-09-01 09:05:07,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:05:07,486 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-09-01 09:05:07,487 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:05:07,487 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:05:07,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1293479595, now seen corresponding path program 1 times [2023-09-01 09:05:07,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:05:07,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21263096] [2023-09-01 09:05:07,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:05:07,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:05:07,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:05:07,550 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:05:07,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:05:07,585 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:05:07,588 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:05:07,589 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:05:07,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 09:05:07,589 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:05:07,590 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:05:07,590 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:05:07,590 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-09-01 09:05:07,675 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:05:07,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 337 places, 362 transitions, 769 flow [2023-09-01 09:05:07,743 INFO L130 PetriNetUnfolder]: 41/420 cut-off events. [2023-09-01 09:05:07,743 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-09-01 09:05:07,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 451 conditions, 420 events. 41/420 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1829 event pairs, 0 based on Foata normal form. 0/363 useless extension candidates. Maximal degree in co-relation 355. Up to 12 conditions per place. [2023-09-01 09:05:07,750 INFO L82 GeneralOperation]: Start removeDead. Operand has 337 places, 362 transitions, 769 flow [2023-09-01 09:05:07,754 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 337 places, 362 transitions, 769 flow [2023-09-01 09:05:07,754 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:05:07,754 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 337 places, 362 transitions, 769 flow [2023-09-01 09:05:07,755 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 337 places, 362 transitions, 769 flow [2023-09-01 09:05:07,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 337 places, 362 transitions, 769 flow [2023-09-01 09:05:07,818 INFO L130 PetriNetUnfolder]: 41/420 cut-off events. [2023-09-01 09:05:07,818 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-09-01 09:05:07,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 451 conditions, 420 events. 41/420 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1829 event pairs, 0 based on Foata normal form. 0/363 useless extension candidates. Maximal degree in co-relation 355. Up to 12 conditions per place. [2023-09-01 09:05:07,855 INFO L119 LiptonReduction]: Number of co-enabled transitions 94250 [2023-09-01 09:05:16,168 INFO L134 LiptonReduction]: Checked pairs total: 149970 [2023-09-01 09:05:16,169 INFO L136 LiptonReduction]: Total number of compositions: 311 [2023-09-01 09:05:16,170 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:05:16,171 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;@13624364, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:05:16,171 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:05:16,185 INFO L130 PetriNetUnfolder]: 35/135 cut-off events. [2023-09-01 09:05:16,185 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-09-01 09:05:16,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:05:16,186 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:05:16,186 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:05:16,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:05:16,187 INFO L85 PathProgramCache]: Analyzing trace with hash 225335959, now seen corresponding path program 1 times [2023-09-01 09:05:16,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:05:16,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809592889] [2023-09-01 09:05:16,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:05:16,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:05:16,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:05:16,244 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:05:16,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:05:16,272 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:05:16,280 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:05:16,281 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:05:16,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 09:05:16,281 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:05:16,282 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:05:16,282 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:05:16,282 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-09-01 09:05:16,372 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:05:16,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 398 places, 428 transitions, 916 flow [2023-09-01 09:05:16,457 INFO L130 PetriNetUnfolder]: 49/498 cut-off events. [2023-09-01 09:05:16,458 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-09-01 09:05:16,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 538 conditions, 498 events. 49/498 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2243 event pairs, 0 based on Foata normal form. 0/430 useless extension candidates. Maximal degree in co-relation 439. Up to 14 conditions per place. [2023-09-01 09:05:16,468 INFO L82 GeneralOperation]: Start removeDead. Operand has 398 places, 428 transitions, 916 flow [2023-09-01 09:05:16,473 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 398 places, 428 transitions, 916 flow [2023-09-01 09:05:16,473 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:05:16,477 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 398 places, 428 transitions, 916 flow [2023-09-01 09:05:16,478 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 398 places, 428 transitions, 916 flow [2023-09-01 09:05:16,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 398 places, 428 transitions, 916 flow [2023-09-01 09:05:16,586 INFO L130 PetriNetUnfolder]: 49/498 cut-off events. [2023-09-01 09:05:16,587 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-09-01 09:05:16,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 538 conditions, 498 events. 49/498 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2243 event pairs, 0 based on Foata normal form. 0/430 useless extension candidates. Maximal degree in co-relation 439. Up to 14 conditions per place. [2023-09-01 09:05:16,622 INFO L119 LiptonReduction]: Number of co-enabled transitions 138840 [2023-09-01 09:05:28,023 INFO L134 LiptonReduction]: Checked pairs total: 204167 [2023-09-01 09:05:28,023 INFO L136 LiptonReduction]: Total number of compositions: 363 [2023-09-01 09:05:28,026 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:05:28,026 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;@13624364, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:05:28,026 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:05:28,044 INFO L130 PetriNetUnfolder]: 42/159 cut-off events. [2023-09-01 09:05:28,044 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-09-01 09:05:28,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:05:28,045 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:05:28,045 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:05:28,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:05:28,045 INFO L85 PathProgramCache]: Analyzing trace with hash 808485537, now seen corresponding path program 1 times [2023-09-01 09:05:28,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:05:28,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989620709] [2023-09-01 09:05:28,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:05:28,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:05:28,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:05:28,090 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:05:28,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:05:28,115 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:05:28,115 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:05:28,116 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:05:28,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 09:05:28,116 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:05:28,116 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:05:28,117 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:05:28,117 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-09-01 09:05:28,223 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:05:28,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 459 places, 494 transitions, 1065 flow [2023-09-01 09:05:28,328 INFO L130 PetriNetUnfolder]: 57/576 cut-off events. [2023-09-01 09:05:28,329 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-09-01 09:05:28,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 626 conditions, 576 events. 57/576 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2654 event pairs, 0 based on Foata normal form. 0/497 useless extension candidates. Maximal degree in co-relation 524. Up to 16 conditions per place. [2023-09-01 09:05:28,342 INFO L82 GeneralOperation]: Start removeDead. Operand has 459 places, 494 transitions, 1065 flow [2023-09-01 09:05:28,350 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 459 places, 494 transitions, 1065 flow [2023-09-01 09:05:28,351 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:05:28,351 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 459 places, 494 transitions, 1065 flow [2023-09-01 09:05:28,351 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 459 places, 494 transitions, 1065 flow [2023-09-01 09:05:28,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 459 places, 494 transitions, 1065 flow [2023-09-01 09:05:28,490 INFO L130 PetriNetUnfolder]: 57/576 cut-off events. [2023-09-01 09:05:28,491 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-09-01 09:05:28,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 626 conditions, 576 events. 57/576 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2654 event pairs, 0 based on Foata normal form. 0/497 useless extension candidates. Maximal degree in co-relation 524. Up to 16 conditions per place. [2023-09-01 09:05:28,540 INFO L119 LiptonReduction]: Number of co-enabled transitions 192010 [2023-09-01 09:05:39,412 INFO L134 LiptonReduction]: Checked pairs total: 275673 [2023-09-01 09:05:39,412 INFO L136 LiptonReduction]: Total number of compositions: 420 [2023-09-01 09:05:39,414 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:05:39,414 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;@13624364, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:05:39,414 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:05:39,435 INFO L130 PetriNetUnfolder]: 49/185 cut-off events. [2023-09-01 09:05:39,435 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-09-01 09:05:39,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:05:39,435 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:05:39,436 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:05:39,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:05:39,436 INFO L85 PathProgramCache]: Analyzing trace with hash -922688473, now seen corresponding path program 1 times [2023-09-01 09:05:39,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:05:39,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423225516] [2023-09-01 09:05:39,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:05:39,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:05:39,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:05:39,457 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:05:39,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:05:39,477 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:05:39,477 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:05:39,477 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:05:39,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 09:05:39,478 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:05:39,478 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:05:39,478 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:05:39,479 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-09-01 09:05:39,591 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:05:39,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 520 places, 560 transitions, 1216 flow [2023-09-01 09:05:39,750 INFO L130 PetriNetUnfolder]: 65/654 cut-off events. [2023-09-01 09:05:39,750 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-09-01 09:05:39,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 715 conditions, 654 events. 65/654 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 3058 event pairs, 0 based on Foata normal form. 0/564 useless extension candidates. Maximal degree in co-relation 610. Up to 18 conditions per place. [2023-09-01 09:05:39,770 INFO L82 GeneralOperation]: Start removeDead. Operand has 520 places, 560 transitions, 1216 flow [2023-09-01 09:05:39,775 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 520 places, 560 transitions, 1216 flow [2023-09-01 09:05:39,775 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:05:39,776 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 520 places, 560 transitions, 1216 flow [2023-09-01 09:05:39,776 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 520 places, 560 transitions, 1216 flow [2023-09-01 09:05:39,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 520 places, 560 transitions, 1216 flow [2023-09-01 09:05:39,950 INFO L130 PetriNetUnfolder]: 65/654 cut-off events. [2023-09-01 09:05:39,951 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-09-01 09:05:39,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 715 conditions, 654 events. 65/654 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 3058 event pairs, 0 based on Foata normal form. 0/564 useless extension candidates. Maximal degree in co-relation 610. Up to 18 conditions per place. [2023-09-01 09:05:40,011 INFO L119 LiptonReduction]: Number of co-enabled transitions 253760 [2023-09-01 09:05:54,649 INFO L134 LiptonReduction]: Checked pairs total: 372709 [2023-09-01 09:05:54,650 INFO L136 LiptonReduction]: Total number of compositions: 481 [2023-09-01 09:05:54,651 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:05:54,651 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;@13624364, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:05:54,652 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:05:54,677 INFO L130 PetriNetUnfolder]: 56/213 cut-off events. [2023-09-01 09:05:54,677 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-09-01 09:05:54,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:05:54,677 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:05:54,678 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:05:54,678 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:05:54,678 INFO L85 PathProgramCache]: Analyzing trace with hash -138790727, now seen corresponding path program 1 times [2023-09-01 09:05:54,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:05:54,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088814718] [2023-09-01 09:05:54,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:05:54,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:05:54,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:05:54,703 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:05:54,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:05:54,722 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:05:54,723 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:05:54,723 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:05:54,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 09:05:54,723 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:05:54,724 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:05:54,724 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:05:54,724 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-09-01 09:05:54,834 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:05:54,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 581 places, 626 transitions, 1369 flow [2023-09-01 09:05:55,021 INFO L130 PetriNetUnfolder]: 73/732 cut-off events. [2023-09-01 09:05:55,021 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-09-01 09:05:55,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 805 conditions, 732 events. 73/732 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 3458 event pairs, 0 based on Foata normal form. 0/631 useless extension candidates. Maximal degree in co-relation 698. Up to 20 conditions per place. [2023-09-01 09:05:55,042 INFO L82 GeneralOperation]: Start removeDead. Operand has 581 places, 626 transitions, 1369 flow [2023-09-01 09:05:55,049 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 581 places, 626 transitions, 1369 flow [2023-09-01 09:05:55,049 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:05:55,049 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 581 places, 626 transitions, 1369 flow [2023-09-01 09:05:55,049 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 581 places, 626 transitions, 1369 flow [2023-09-01 09:05:55,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 581 places, 626 transitions, 1369 flow [2023-09-01 09:05:55,213 INFO L130 PetriNetUnfolder]: 73/732 cut-off events. [2023-09-01 09:05:55,214 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-09-01 09:05:55,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 805 conditions, 732 events. 73/732 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 3458 event pairs, 0 based on Foata normal form. 0/631 useless extension candidates. Maximal degree in co-relation 698. Up to 20 conditions per place. [2023-09-01 09:05:55,342 INFO L119 LiptonReduction]: Number of co-enabled transitions 324090 [2023-09-01 09:06:10,503 INFO L134 LiptonReduction]: Checked pairs total: 489183 [2023-09-01 09:06:10,503 INFO L136 LiptonReduction]: Total number of compositions: 538 [2023-09-01 09:06:10,505 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:06:10,505 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;@13624364, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:06:10,505 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:06:10,530 INFO L130 PetriNetUnfolder]: 63/241 cut-off events. [2023-09-01 09:06:10,530 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-09-01 09:06:10,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:06:10,530 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:06:10,530 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:06:10,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:06:10,530 INFO L85 PathProgramCache]: Analyzing trace with hash -190864054, now seen corresponding path program 1 times [2023-09-01 09:06:10,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:06:10,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008443137] [2023-09-01 09:06:10,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:06:10,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:06:10,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:06:10,563 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:06:10,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:06:10,595 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:06:10,595 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:06:10,596 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:06:10,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 09:06:10,596 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:06:10,599 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:06:10,599 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:06:10,599 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-09-01 09:06:10,720 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:06:10,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 642 places, 692 transitions, 1524 flow [2023-09-01 09:06:10,997 INFO L130 PetriNetUnfolder]: 81/810 cut-off events. [2023-09-01 09:06:10,997 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-09-01 09:06:11,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 896 conditions, 810 events. 81/810 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3904 event pairs, 0 based on Foata normal form. 0/698 useless extension candidates. Maximal degree in co-relation 788. Up to 22 conditions per place. [2023-09-01 09:06:11,018 INFO L82 GeneralOperation]: Start removeDead. Operand has 642 places, 692 transitions, 1524 flow [2023-09-01 09:06:11,026 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 642 places, 692 transitions, 1524 flow [2023-09-01 09:06:11,026 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:06:11,026 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 642 places, 692 transitions, 1524 flow [2023-09-01 09:06:11,026 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 642 places, 692 transitions, 1524 flow [2023-09-01 09:06:11,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 642 places, 692 transitions, 1524 flow [2023-09-01 09:06:11,296 INFO L130 PetriNetUnfolder]: 81/810 cut-off events. [2023-09-01 09:06:11,296 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-09-01 09:06:11,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 896 conditions, 810 events. 81/810 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3904 event pairs, 0 based on Foata normal form. 0/698 useless extension candidates. Maximal degree in co-relation 788. Up to 22 conditions per place. [2023-09-01 09:06:11,398 INFO L119 LiptonReduction]: Number of co-enabled transitions 403000 [2023-09-01 09:06:27,297 INFO L134 LiptonReduction]: Checked pairs total: 592134 [2023-09-01 09:06:27,297 INFO L136 LiptonReduction]: Total number of compositions: 591 [2023-09-01 09:06:27,298 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:06:27,299 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;@13624364, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:06:27,299 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:06:27,338 INFO L130 PetriNetUnfolder]: 70/265 cut-off events. [2023-09-01 09:06:27,338 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-09-01 09:06:27,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:06:27,338 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:06:27,339 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:06:27,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:06:27,339 INFO L85 PathProgramCache]: Analyzing trace with hash 399007510, now seen corresponding path program 1 times [2023-09-01 09:06:27,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:06:27,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852831345] [2023-09-01 09:06:27,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:06:27,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:06:27,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:06:27,364 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:06:27,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:06:27,387 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:06:27,388 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:06:27,388 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:06:27,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 09:06:27,388 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:06:27,389 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:06:27,389 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:06:27,389 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-09-01 09:06:27,529 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:06:27,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 703 places, 758 transitions, 1681 flow [2023-09-01 09:06:27,831 INFO L130 PetriNetUnfolder]: 89/888 cut-off events. [2023-09-01 09:06:27,832 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-09-01 09:06:27,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 988 conditions, 888 events. 89/888 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 4311 event pairs, 0 based on Foata normal form. 0/765 useless extension candidates. Maximal degree in co-relation 879. Up to 24 conditions per place. [2023-09-01 09:06:27,860 INFO L82 GeneralOperation]: Start removeDead. Operand has 703 places, 758 transitions, 1681 flow [2023-09-01 09:06:27,869 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 703 places, 758 transitions, 1681 flow [2023-09-01 09:06:27,869 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:06:27,869 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 703 places, 758 transitions, 1681 flow [2023-09-01 09:06:27,870 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 703 places, 758 transitions, 1681 flow [2023-09-01 09:06:27,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 703 places, 758 transitions, 1681 flow [2023-09-01 09:06:28,120 INFO L130 PetriNetUnfolder]: 89/888 cut-off events. [2023-09-01 09:06:28,120 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-09-01 09:06:28,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 988 conditions, 888 events. 89/888 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 4311 event pairs, 0 based on Foata normal form. 0/765 useless extension candidates. Maximal degree in co-relation 879. Up to 24 conditions per place. [2023-09-01 09:06:28,211 INFO L119 LiptonReduction]: Number of co-enabled transitions 490490 [2023-09-01 09:06:46,713 INFO L134 LiptonReduction]: Checked pairs total: 715948 [2023-09-01 09:06:46,713 INFO L136 LiptonReduction]: Total number of compositions: 643 [2023-09-01 09:06:46,714 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:06:46,714 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;@13624364, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:06:46,714 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:06:46,741 INFO L130 PetriNetUnfolder]: 77/287 cut-off events. [2023-09-01 09:06:46,741 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-09-01 09:06:46,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:06:46,742 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:06:46,742 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:06:46,742 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:06:46,742 INFO L85 PathProgramCache]: Analyzing trace with hash -146675204, now seen corresponding path program 1 times [2023-09-01 09:06:46,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:06:46,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127788724] [2023-09-01 09:06:46,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:06:46,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:06:46,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:06:46,769 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:06:46,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:06:46,798 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:06:46,799 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:06:46,799 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:06:46,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-09-01 09:06:46,799 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:06:46,799 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:06:46,800 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:06:46,800 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-09-01 09:06:46,947 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:06:46,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 764 places, 824 transitions, 1840 flow [2023-09-01 09:06:47,262 INFO L130 PetriNetUnfolder]: 97/966 cut-off events. [2023-09-01 09:06:47,263 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-09-01 09:06:47,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1081 conditions, 966 events. 97/966 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 4707 event pairs, 0 based on Foata normal form. 0/832 useless extension candidates. Maximal degree in co-relation 971. Up to 26 conditions per place. [2023-09-01 09:06:47,296 INFO L82 GeneralOperation]: Start removeDead. Operand has 764 places, 824 transitions, 1840 flow [2023-09-01 09:06:47,305 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 764 places, 824 transitions, 1840 flow [2023-09-01 09:06:47,306 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:06:47,306 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 764 places, 824 transitions, 1840 flow [2023-09-01 09:06:47,306 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 764 places, 824 transitions, 1840 flow [2023-09-01 09:06:47,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 764 places, 824 transitions, 1840 flow [2023-09-01 09:06:47,554 INFO L130 PetriNetUnfolder]: 97/966 cut-off events. [2023-09-01 09:06:47,554 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-09-01 09:06:47,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1081 conditions, 966 events. 97/966 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 4707 event pairs, 0 based on Foata normal form. 0/832 useless extension candidates. Maximal degree in co-relation 971. Up to 26 conditions per place. [2023-09-01 09:06:47,826 INFO L119 LiptonReduction]: Number of co-enabled transitions 586560 [2023-09-01 09:07:06,881 INFO L134 LiptonReduction]: Checked pairs total: 870402 [2023-09-01 09:07:06,881 INFO L136 LiptonReduction]: Total number of compositions: 706 [2023-09-01 09:07:06,883 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:07:06,884 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;@13624364, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:07:06,884 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:07:06,917 INFO L130 PetriNetUnfolder]: 84/316 cut-off events. [2023-09-01 09:07:06,917 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-09-01 09:07:06,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:07:06,917 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 09:07:06,918 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:07:06,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:07:06,918 INFO L85 PathProgramCache]: Analyzing trace with hash 658467665, now seen corresponding path program 1 times [2023-09-01 09:07:06,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:07:06,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363352250] [2023-09-01 09:07:06,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:07:06,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:07:06,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:07:06,953 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:07:06,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:07:06,989 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:07:06,990 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:07:06,990 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:07:06,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 09:07:06,990 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:07:06,993 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:07:06,993 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:07:06,994 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-09-01 09:07:07,156 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:07:07,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 825 places, 890 transitions, 2001 flow [2023-09-01 09:07:07,488 INFO L130 PetriNetUnfolder]: 105/1044 cut-off events. [2023-09-01 09:07:07,489 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-09-01 09:07:07,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1175 conditions, 1044 events. 105/1044 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 5129 event pairs, 0 based on Foata normal form. 0/899 useless extension candidates. Maximal degree in co-relation 1064. Up to 28 conditions per place. [2023-09-01 09:07:07,517 INFO L82 GeneralOperation]: Start removeDead. Operand has 825 places, 890 transitions, 2001 flow [2023-09-01 09:07:07,526 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 825 places, 890 transitions, 2001 flow [2023-09-01 09:07:07,526 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:07:07,526 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 825 places, 890 transitions, 2001 flow [2023-09-01 09:07:07,526 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 825 places, 890 transitions, 2001 flow [2023-09-01 09:07:07,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 825 places, 890 transitions, 2001 flow [2023-09-01 09:07:07,765 INFO L130 PetriNetUnfolder]: 105/1044 cut-off events. [2023-09-01 09:07:07,765 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-09-01 09:07:07,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1175 conditions, 1044 events. 105/1044 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 5129 event pairs, 0 based on Foata normal form. 0/899 useless extension candidates. Maximal degree in co-relation 1064. Up to 28 conditions per place. [2023-09-01 09:07:07,904 INFO L119 LiptonReduction]: Number of co-enabled transitions 691210 [2023-09-01 09:07:30,817 INFO L134 LiptonReduction]: Checked pairs total: 1032011 [2023-09-01 09:07:30,817 INFO L136 LiptonReduction]: Total number of compositions: 766 [2023-09-01 09:07:30,820 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:07:30,820 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;@13624364, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:07:30,820 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:07:30,862 INFO L130 PetriNetUnfolder]: 91/345 cut-off events. [2023-09-01 09:07:30,862 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-09-01 09:07:30,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:07:30,862 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 09:07:30,862 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:07:30,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:07:30,863 INFO L85 PathProgramCache]: Analyzing trace with hash -935426987, now seen corresponding path program 1 times [2023-09-01 09:07:30,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:07:30,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793312341] [2023-09-01 09:07:30,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:07:30,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:07:30,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:07:30,893 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:07:30,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:07:30,920 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:07:30,921 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:07:30,921 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:07:30,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-09-01 09:07:30,921 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:07:30,922 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:07:30,922 WARN L233 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:07:30,922 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2023-09-01 09:07:31,095 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:07:31,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 886 places, 956 transitions, 2164 flow [2023-09-01 09:07:31,466 INFO L130 PetriNetUnfolder]: 113/1122 cut-off events. [2023-09-01 09:07:31,466 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-09-01 09:07:31,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1270 conditions, 1122 events. 113/1122 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 5512 event pairs, 0 based on Foata normal form. 0/966 useless extension candidates. Maximal degree in co-relation 1158. Up to 30 conditions per place. [2023-09-01 09:07:31,505 INFO L82 GeneralOperation]: Start removeDead. Operand has 886 places, 956 transitions, 2164 flow [2023-09-01 09:07:31,516 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 886 places, 956 transitions, 2164 flow [2023-09-01 09:07:31,516 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:07:31,516 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 886 places, 956 transitions, 2164 flow [2023-09-01 09:07:31,516 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 886 places, 956 transitions, 2164 flow [2023-09-01 09:07:31,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 886 places, 956 transitions, 2164 flow [2023-09-01 09:07:31,819 INFO L130 PetriNetUnfolder]: 113/1122 cut-off events. [2023-09-01 09:07:31,819 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-09-01 09:07:31,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1270 conditions, 1122 events. 113/1122 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 5512 event pairs, 0 based on Foata normal form. 0/966 useless extension candidates. Maximal degree in co-relation 1158. Up to 30 conditions per place. [2023-09-01 09:07:31,957 INFO L119 LiptonReduction]: Number of co-enabled transitions 804440 [2023-09-01 09:07:54,372 INFO L134 LiptonReduction]: Checked pairs total: 1184303 [2023-09-01 09:07:54,372 INFO L136 LiptonReduction]: Total number of compositions: 813 [2023-09-01 09:07:54,373 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:07:54,374 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;@13624364, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:07:54,374 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:07:54,419 INFO L130 PetriNetUnfolder]: 98/367 cut-off events. [2023-09-01 09:07:54,420 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-09-01 09:07:54,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:07:54,420 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 09:07:54,420 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:07:54,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:07:54,420 INFO L85 PathProgramCache]: Analyzing trace with hash -746510732, now seen corresponding path program 1 times [2023-09-01 09:07:54,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:07:54,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560451286] [2023-09-01 09:07:54,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:07:54,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:07:54,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:07:54,450 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:07:54,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:07:54,482 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:07:54,483 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:07:54,483 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:07:54,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-09-01 09:07:54,483 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:07:54,484 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:07:54,484 WARN L233 ceAbstractionStarter]: 14 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:07:54,484 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 15 thread instances. [2023-09-01 09:07:54,691 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:07:54,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 947 places, 1022 transitions, 2329 flow [2023-09-01 09:07:55,209 INFO L130 PetriNetUnfolder]: 121/1200 cut-off events. [2023-09-01 09:07:55,209 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-09-01 09:07:55,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1366 conditions, 1200 events. 121/1200 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 5960 event pairs, 0 based on Foata normal form. 0/1033 useless extension candidates. Maximal degree in co-relation 1253. Up to 32 conditions per place. [2023-09-01 09:07:55,246 INFO L82 GeneralOperation]: Start removeDead. Operand has 947 places, 1022 transitions, 2329 flow [2023-09-01 09:07:55,255 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 947 places, 1022 transitions, 2329 flow [2023-09-01 09:07:55,255 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:07:55,256 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 947 places, 1022 transitions, 2329 flow [2023-09-01 09:07:55,256 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 947 places, 1022 transitions, 2329 flow [2023-09-01 09:07:55,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 947 places, 1022 transitions, 2329 flow [2023-09-01 09:07:55,583 INFO L130 PetriNetUnfolder]: 121/1200 cut-off events. [2023-09-01 09:07:55,583 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-09-01 09:07:55,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1366 conditions, 1200 events. 121/1200 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 5960 event pairs, 0 based on Foata normal form. 0/1033 useless extension candidates. Maximal degree in co-relation 1253. Up to 32 conditions per place. [2023-09-01 09:07:55,776 INFO L119 LiptonReduction]: Number of co-enabled transitions 926250 [2023-09-01 09:08:20,500 INFO L134 LiptonReduction]: Checked pairs total: 1383913 [2023-09-01 09:08:20,500 INFO L136 LiptonReduction]: Total number of compositions: 867 [2023-09-01 09:08:20,501 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:08:20,502 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;@13624364, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:08:20,502 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:08:20,553 INFO L130 PetriNetUnfolder]: 105/391 cut-off events. [2023-09-01 09:08:20,554 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-09-01 09:08:20,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:08:20,554 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 09:08:20,554 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:08:20,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:08:20,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1563340026, now seen corresponding path program 1 times [2023-09-01 09:08:20,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:08:20,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990029899] [2023-09-01 09:08:20,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:08:20,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:08:20,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:08:20,588 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:08:20,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:08:20,622 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:08:20,623 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:08:20,623 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:08:20,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-09-01 09:08:20,623 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:08:20,624 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:08:20,624 WARN L233 ceAbstractionStarter]: 15 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:08:20,624 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 16 thread instances. [2023-09-01 09:08:20,938 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:08:20,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1008 places, 1088 transitions, 2496 flow [2023-09-01 09:08:21,320 INFO L130 PetriNetUnfolder]: 129/1278 cut-off events. [2023-09-01 09:08:21,320 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-09-01 09:08:21,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1463 conditions, 1278 events. 129/1278 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 6374 event pairs, 0 based on Foata normal form. 0/1100 useless extension candidates. Maximal degree in co-relation 1349. Up to 34 conditions per place. [2023-09-01 09:08:21,373 INFO L82 GeneralOperation]: Start removeDead. Operand has 1008 places, 1088 transitions, 2496 flow [2023-09-01 09:08:21,387 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1008 places, 1088 transitions, 2496 flow [2023-09-01 09:08:21,387 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:08:21,387 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1008 places, 1088 transitions, 2496 flow [2023-09-01 09:08:21,387 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1008 places, 1088 transitions, 2496 flow [2023-09-01 09:08:21,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1008 places, 1088 transitions, 2496 flow [2023-09-01 09:08:21,772 INFO L130 PetriNetUnfolder]: 129/1278 cut-off events. [2023-09-01 09:08:21,772 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-09-01 09:08:21,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1463 conditions, 1278 events. 129/1278 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 6374 event pairs, 0 based on Foata normal form. 0/1100 useless extension candidates. Maximal degree in co-relation 1349. Up to 34 conditions per place. [2023-09-01 09:08:22,096 INFO L119 LiptonReduction]: Number of co-enabled transitions 1056640 [2023-09-01 09:08:50,122 INFO L134 LiptonReduction]: Checked pairs total: 1532347 [2023-09-01 09:08:50,123 INFO L136 LiptonReduction]: Total number of compositions: 925 [2023-09-01 09:08:50,127 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:08:50,127 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;@13624364, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:08:50,127 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:08:50,186 INFO L130 PetriNetUnfolder]: 112/418 cut-off events. [2023-09-01 09:08:50,186 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-09-01 09:08:50,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:08:50,187 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 09:08:50,187 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:08:50,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:08:50,187 INFO L85 PathProgramCache]: Analyzing trace with hash -809813236, now seen corresponding path program 1 times [2023-09-01 09:08:50,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:08:50,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026010502] [2023-09-01 09:08:50,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:08:50,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:08:50,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:08:50,226 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:08:50,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:08:50,259 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:08:50,260 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:08:50,260 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:08:50,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-09-01 09:08:50,260 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:08:50,261 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:08:50,261 WARN L233 ceAbstractionStarter]: 16 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:08:50,261 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 17 thread instances. [2023-09-01 09:08:50,479 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:08:50,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1069 places, 1154 transitions, 2665 flow [2023-09-01 09:08:50,985 INFO L130 PetriNetUnfolder]: 137/1356 cut-off events. [2023-09-01 09:08:50,985 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-09-01 09:08:51,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1561 conditions, 1356 events. 137/1356 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 6747 event pairs, 0 based on Foata normal form. 0/1167 useless extension candidates. Maximal degree in co-relation 1446. Up to 36 conditions per place. [2023-09-01 09:08:51,036 INFO L82 GeneralOperation]: Start removeDead. Operand has 1069 places, 1154 transitions, 2665 flow [2023-09-01 09:08:51,053 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1069 places, 1154 transitions, 2665 flow [2023-09-01 09:08:51,054 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:08:51,054 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1069 places, 1154 transitions, 2665 flow [2023-09-01 09:08:51,054 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1069 places, 1154 transitions, 2665 flow [2023-09-01 09:08:51,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1069 places, 1154 transitions, 2665 flow [2023-09-01 09:08:51,470 INFO L130 PetriNetUnfolder]: 137/1356 cut-off events. [2023-09-01 09:08:51,470 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-09-01 09:08:51,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1561 conditions, 1356 events. 137/1356 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 6747 event pairs, 0 based on Foata normal form. 0/1167 useless extension candidates. Maximal degree in co-relation 1446. Up to 36 conditions per place. [2023-09-01 09:08:51,722 INFO L119 LiptonReduction]: Number of co-enabled transitions 1195610 [2023-09-01 09:09:19,243 INFO L134 LiptonReduction]: Checked pairs total: 1897904 [2023-09-01 09:09:19,244 INFO L136 LiptonReduction]: Total number of compositions: 992 [2023-09-01 09:09:19,245 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:09:19,245 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;@13624364, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:09:19,245 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:09:19,337 INFO L130 PetriNetUnfolder]: 119/448 cut-off events. [2023-09-01 09:09:19,337 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-09-01 09:09:19,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:09:19,337 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 09:09:19,337 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:09:19,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:09:19,337 INFO L85 PathProgramCache]: Analyzing trace with hash 275508508, now seen corresponding path program 1 times [2023-09-01 09:09:19,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:09:19,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411756146] [2023-09-01 09:09:19,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:09:19,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:09:19,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:09:19,377 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:09:19,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:09:19,483 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:09:19,485 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:09:19,485 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:09:19,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-09-01 09:09:19,486 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:09:19,486 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:09:19,486 WARN L233 ceAbstractionStarter]: 17 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:09:19,486 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 18 thread instances. [2023-09-01 09:09:19,705 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:09:19,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1130 places, 1220 transitions, 2836 flow [2023-09-01 09:09:20,259 INFO L130 PetriNetUnfolder]: 145/1434 cut-off events. [2023-09-01 09:09:20,259 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-09-01 09:09:20,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1660 conditions, 1434 events. 145/1434 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 7185 event pairs, 0 based on Foata normal form. 0/1234 useless extension candidates. Maximal degree in co-relation 1544. Up to 38 conditions per place. [2023-09-01 09:09:20,338 INFO L82 GeneralOperation]: Start removeDead. Operand has 1130 places, 1220 transitions, 2836 flow [2023-09-01 09:09:20,355 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1130 places, 1220 transitions, 2836 flow [2023-09-01 09:09:20,355 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:09:20,355 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1130 places, 1220 transitions, 2836 flow [2023-09-01 09:09:20,355 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1130 places, 1220 transitions, 2836 flow [2023-09-01 09:09:20,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1130 places, 1220 transitions, 2836 flow [2023-09-01 09:09:20,897 INFO L130 PetriNetUnfolder]: 145/1434 cut-off events. [2023-09-01 09:09:20,898 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-09-01 09:09:20,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1660 conditions, 1434 events. 145/1434 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 7185 event pairs, 0 based on Foata normal form. 0/1234 useless extension candidates. Maximal degree in co-relation 1544. Up to 38 conditions per place. [2023-09-01 09:09:21,163 INFO L119 LiptonReduction]: Number of co-enabled transitions 1343160 [2023-09-01 09:09:52,763 INFO L134 LiptonReduction]: Checked pairs total: 2129375 [2023-09-01 09:09:52,763 INFO L136 LiptonReduction]: Total number of compositions: 1034 [2023-09-01 09:09:52,764 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:09:52,764 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;@13624364, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:09:52,764 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:09:52,823 INFO L130 PetriNetUnfolder]: 126/473 cut-off events. [2023-09-01 09:09:52,824 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-09-01 09:09:52,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:09:52,824 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 09:09:52,824 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:09:52,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:09:52,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1770135120, now seen corresponding path program 1 times [2023-09-01 09:09:52,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:09:52,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923866187] [2023-09-01 09:09:52,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:09:52,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:09:52,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:09:52,864 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:09:52,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:09:52,901 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:09:52,903 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:09:52,903 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:09:52,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-09-01 09:09:52,904 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:09:52,904 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:09:52,904 WARN L233 ceAbstractionStarter]: 18 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:09:52,904 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 19 thread instances. [2023-09-01 09:09:53,124 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:09:53,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1191 places, 1286 transitions, 3009 flow [2023-09-01 09:09:53,691 INFO L130 PetriNetUnfolder]: 153/1512 cut-off events. [2023-09-01 09:09:53,691 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-09-01 09:09:53,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1760 conditions, 1512 events. 153/1512 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 7581 event pairs, 0 based on Foata normal form. 0/1301 useless extension candidates. Maximal degree in co-relation 1643. Up to 40 conditions per place. [2023-09-01 09:09:53,770 INFO L82 GeneralOperation]: Start removeDead. Operand has 1191 places, 1286 transitions, 3009 flow [2023-09-01 09:09:53,792 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1191 places, 1286 transitions, 3009 flow [2023-09-01 09:09:53,792 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:09:53,792 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1191 places, 1286 transitions, 3009 flow [2023-09-01 09:09:53,793 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1191 places, 1286 transitions, 3009 flow [2023-09-01 09:09:53,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1191 places, 1286 transitions, 3009 flow [2023-09-01 09:09:54,355 INFO L130 PetriNetUnfolder]: 153/1512 cut-off events. [2023-09-01 09:09:54,355 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-09-01 09:09:54,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1760 conditions, 1512 events. 153/1512 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 7581 event pairs, 0 based on Foata normal form. 0/1301 useless extension candidates. Maximal degree in co-relation 1643. Up to 40 conditions per place. [2023-09-01 09:09:54,671 INFO L119 LiptonReduction]: Number of co-enabled transitions 1499290 [2023-09-01 09:10:25,908 INFO L134 LiptonReduction]: Checked pairs total: 2246949 [2023-09-01 09:10:25,908 INFO L136 LiptonReduction]: Total number of compositions: 1088 [2023-09-01 09:10:25,909 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:10:25,910 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;@13624364, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:10:25,910 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:10:25,981 INFO L130 PetriNetUnfolder]: 133/498 cut-off events. [2023-09-01 09:10:25,981 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-09-01 09:10:25,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:10:25,981 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 09:10:25,981 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:10:25,981 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:10:25,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1305009854, now seen corresponding path program 1 times [2023-09-01 09:10:25,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:10:25,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992157606] [2023-09-01 09:10:25,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:10:25,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:10:26,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:10:26,021 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:10:26,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:10:26,066 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:10:26,067 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:10:26,067 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:10:26,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-09-01 09:10:26,067 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:10:26,068 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:10:26,068 WARN L233 ceAbstractionStarter]: 19 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:10:26,068 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 20 thread instances. [2023-09-01 09:10:26,275 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:10:26,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1252 places, 1352 transitions, 3184 flow [2023-09-01 09:10:26,912 INFO L130 PetriNetUnfolder]: 161/1590 cut-off events. [2023-09-01 09:10:26,912 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-09-01 09:10:26,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1861 conditions, 1590 events. 161/1590 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 8037 event pairs, 0 based on Foata normal form. 0/1368 useless extension candidates. Maximal degree in co-relation 1743. Up to 42 conditions per place. [2023-09-01 09:10:26,986 INFO L82 GeneralOperation]: Start removeDead. Operand has 1252 places, 1352 transitions, 3184 flow [2023-09-01 09:10:27,003 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1252 places, 1352 transitions, 3184 flow [2023-09-01 09:10:27,004 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:10:27,004 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1252 places, 1352 transitions, 3184 flow [2023-09-01 09:10:27,004 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1252 places, 1352 transitions, 3184 flow [2023-09-01 09:10:27,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1252 places, 1352 transitions, 3184 flow [2023-09-01 09:10:27,640 INFO L130 PetriNetUnfolder]: 161/1590 cut-off events. [2023-09-01 09:10:27,640 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-09-01 09:10:27,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1861 conditions, 1590 events. 161/1590 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 8037 event pairs, 0 based on Foata normal form. 0/1368 useless extension candidates. Maximal degree in co-relation 1743. Up to 42 conditions per place. [2023-09-01 09:10:27,936 INFO L119 LiptonReduction]: Number of co-enabled transitions 1664000 [2023-09-01 09:11:05,653 INFO L134 LiptonReduction]: Checked pairs total: 2472688 [2023-09-01 09:11:05,654 INFO L136 LiptonReduction]: Total number of compositions: 1153 [2023-09-01 09:11:05,655 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:11:05,656 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;@13624364, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:11:05,656 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:11:05,761 INFO L130 PetriNetUnfolder]: 140/527 cut-off events. [2023-09-01 09:11:05,762 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-09-01 09:11:05,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:11:05,762 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 09:11:05,762 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:11:05,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:11:05,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1901634264, now seen corresponding path program 1 times [2023-09-01 09:11:05,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:11:05,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448458643] [2023-09-01 09:11:05,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:11:05,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:11:05,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:11:05,817 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:11:05,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:11:05,892 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:11:05,893 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:11:05,893 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:11:05,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-09-01 09:11:05,893 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:11:05,894 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:11:05,894 WARN L233 ceAbstractionStarter]: 20 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:11:05,895 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 21 thread instances. [2023-09-01 09:11:06,195 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:11:06,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1313 places, 1418 transitions, 3361 flow [2023-09-01 09:11:07,025 INFO L130 PetriNetUnfolder]: 169/1668 cut-off events. [2023-09-01 09:11:07,025 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-09-01 09:11:07,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1963 conditions, 1668 events. 169/1668 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 8384 event pairs, 0 based on Foata normal form. 0/1435 useless extension candidates. Maximal degree in co-relation 1844. Up to 44 conditions per place. [2023-09-01 09:11:07,144 INFO L82 GeneralOperation]: Start removeDead. Operand has 1313 places, 1418 transitions, 3361 flow [2023-09-01 09:11:07,175 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1313 places, 1418 transitions, 3361 flow [2023-09-01 09:11:07,175 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:11:07,175 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1313 places, 1418 transitions, 3361 flow [2023-09-01 09:11:07,176 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1313 places, 1418 transitions, 3361 flow [2023-09-01 09:11:07,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1313 places, 1418 transitions, 3361 flow [2023-09-01 09:11:07,892 INFO L130 PetriNetUnfolder]: 169/1668 cut-off events. [2023-09-01 09:11:07,892 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-09-01 09:11:07,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1963 conditions, 1668 events. 169/1668 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 8384 event pairs, 0 based on Foata normal form. 0/1435 useless extension candidates. Maximal degree in co-relation 1844. Up to 44 conditions per place. [2023-09-01 09:11:08,254 INFO L119 LiptonReduction]: Number of co-enabled transitions 1837290 [2023-09-01 09:11:43,552 INFO L134 LiptonReduction]: Checked pairs total: 2739074 [2023-09-01 09:11:43,553 INFO L136 LiptonReduction]: Total number of compositions: 1212 [2023-09-01 09:11:43,554 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:11:43,554 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;@13624364, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:11:43,555 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:11:43,641 INFO L130 PetriNetUnfolder]: 147/552 cut-off events. [2023-09-01 09:11:43,641 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-09-01 09:11:43,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:11:43,641 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 09:11:43,641 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:11:43,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:11:43,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1858346417, now seen corresponding path program 1 times [2023-09-01 09:11:43,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:11:43,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577350366] [2023-09-01 09:11:43,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:11:43,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:11:43,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:11:43,691 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:11:43,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:11:43,736 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:11:43,736 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:11:43,736 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:11:43,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-09-01 09:11:43,737 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:11:43,737 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:11:43,737 WARN L233 ceAbstractionStarter]: 21 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:11:43,737 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 22 thread instances. [2023-09-01 09:11:44,059 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:11:44,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1374 places, 1484 transitions, 3540 flow [2023-09-01 09:11:44,764 INFO L130 PetriNetUnfolder]: 177/1746 cut-off events. [2023-09-01 09:11:44,765 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-09-01 09:11:44,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2066 conditions, 1746 events. 177/1746 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 8831 event pairs, 0 based on Foata normal form. 0/1502 useless extension candidates. Maximal degree in co-relation 1946. Up to 46 conditions per place. [2023-09-01 09:11:44,947 INFO L82 GeneralOperation]: Start removeDead. Operand has 1374 places, 1484 transitions, 3540 flow [2023-09-01 09:11:44,989 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1374 places, 1484 transitions, 3540 flow [2023-09-01 09:11:44,989 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:11:44,989 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1374 places, 1484 transitions, 3540 flow [2023-09-01 09:11:44,990 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1374 places, 1484 transitions, 3540 flow [2023-09-01 09:11:44,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1374 places, 1484 transitions, 3540 flow [2023-09-01 09:11:45,780 INFO L130 PetriNetUnfolder]: 177/1746 cut-off events. [2023-09-01 09:11:45,780 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-09-01 09:11:45,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2066 conditions, 1746 events. 177/1746 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 8831 event pairs, 0 based on Foata normal form. 0/1502 useless extension candidates. Maximal degree in co-relation 1946. Up to 46 conditions per place. [2023-09-01 09:11:46,176 INFO L119 LiptonReduction]: Number of co-enabled transitions 2019160 [2023-09-01 09:12:23,281 INFO L134 LiptonReduction]: Checked pairs total: 2965305 [2023-09-01 09:12:23,281 INFO L136 LiptonReduction]: Total number of compositions: 1269 [2023-09-01 09:12:23,283 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:12:23,283 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;@13624364, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:12:23,283 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:12:23,373 INFO L130 PetriNetUnfolder]: 154/581 cut-off events. [2023-09-01 09:12:23,373 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-09-01 09:12:23,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:12:23,373 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 09:12:23,373 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:12:23,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:12:23,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1961496874, now seen corresponding path program 1 times [2023-09-01 09:12:23,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:12:23,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113408693] [2023-09-01 09:12:23,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:12:23,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:12:23,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:12:23,423 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:12:23,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:12:23,468 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:12:23,469 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:12:23,469 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:12:23,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-09-01 09:12:23,469 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:12:23,470 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:12:23,470 WARN L233 ceAbstractionStarter]: 22 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:12:23,470 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 23 thread instances. [2023-09-01 09:12:23,708 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:12:23,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1435 places, 1550 transitions, 3721 flow [2023-09-01 09:12:24,513 INFO L130 PetriNetUnfolder]: 185/1824 cut-off events. [2023-09-01 09:12:24,513 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-09-01 09:12:24,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2170 conditions, 1824 events. 185/1824 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 9235 event pairs, 0 based on Foata normal form. 0/1569 useless extension candidates. Maximal degree in co-relation 2049. Up to 48 conditions per place. [2023-09-01 09:12:24,613 INFO L82 GeneralOperation]: Start removeDead. Operand has 1435 places, 1550 transitions, 3721 flow [2023-09-01 09:12:24,638 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1435 places, 1550 transitions, 3721 flow [2023-09-01 09:12:24,638 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:12:24,638 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1435 places, 1550 transitions, 3721 flow [2023-09-01 09:12:24,639 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1435 places, 1550 transitions, 3721 flow [2023-09-01 09:12:24,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1435 places, 1550 transitions, 3721 flow [2023-09-01 09:12:25,451 INFO L130 PetriNetUnfolder]: 185/1824 cut-off events. [2023-09-01 09:12:25,451 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-09-01 09:12:25,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2170 conditions, 1824 events. 185/1824 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 9235 event pairs, 0 based on Foata normal form. 0/1569 useless extension candidates. Maximal degree in co-relation 2049. Up to 48 conditions per place. [2023-09-01 09:12:25,845 INFO L119 LiptonReduction]: Number of co-enabled transitions 2209610 [2023-09-01 09:13:04,489 INFO L134 LiptonReduction]: Checked pairs total: 3259428 [2023-09-01 09:13:04,490 INFO L136 LiptonReduction]: Total number of compositions: 1328 [2023-09-01 09:13:04,491 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:13:04,491 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;@13624364, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:13:04,491 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:13:04,587 INFO L130 PetriNetUnfolder]: 161/605 cut-off events. [2023-09-01 09:13:04,588 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-09-01 09:13:04,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:13:04,588 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 09:13:04,588 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:13:04,588 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:13:04,588 INFO L85 PathProgramCache]: Analyzing trace with hash -618057235, now seen corresponding path program 1 times [2023-09-01 09:13:04,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:13:04,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558226009] [2023-09-01 09:13:04,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:13:04,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:13:04,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:13:04,698 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:13:04,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:13:04,752 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:13:04,752 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:13:04,753 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:13:04,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-09-01 09:13:04,753 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:13:04,753 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:13:04,753 WARN L233 ceAbstractionStarter]: 23 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:13:04,754 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 24 thread instances. [2023-09-01 09:13:05,235 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:13:05,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1496 places, 1616 transitions, 3904 flow [2023-09-01 09:13:06,813 INFO L130 PetriNetUnfolder]: 193/1902 cut-off events. [2023-09-01 09:13:06,813 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-09-01 09:13:06,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2275 conditions, 1902 events. 193/1902 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 9697 event pairs, 0 based on Foata normal form. 0/1636 useless extension candidates. Maximal degree in co-relation 2153. Up to 50 conditions per place. [2023-09-01 09:13:06,921 INFO L82 GeneralOperation]: Start removeDead. Operand has 1496 places, 1616 transitions, 3904 flow [2023-09-01 09:13:06,948 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1496 places, 1616 transitions, 3904 flow [2023-09-01 09:13:06,948 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:13:06,948 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1496 places, 1616 transitions, 3904 flow [2023-09-01 09:13:06,948 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1496 places, 1616 transitions, 3904 flow [2023-09-01 09:13:06,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1496 places, 1616 transitions, 3904 flow [2023-09-01 09:13:07,989 INFO L130 PetriNetUnfolder]: 193/1902 cut-off events. [2023-09-01 09:13:07,989 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-09-01 09:13:08,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2275 conditions, 1902 events. 193/1902 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 9697 event pairs, 0 based on Foata normal form. 0/1636 useless extension candidates. Maximal degree in co-relation 2153. Up to 50 conditions per place. [2023-09-01 09:13:08,595 INFO L119 LiptonReduction]: Number of co-enabled transitions 2408640 [2023-09-01 09:13:49,437 INFO L134 LiptonReduction]: Checked pairs total: 3583040 [2023-09-01 09:13:49,438 INFO L136 LiptonReduction]: Total number of compositions: 1376 [2023-09-01 09:13:49,439 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:13:49,439 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;@13624364, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:13:49,439 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:13:49,542 INFO L130 PetriNetUnfolder]: 168/629 cut-off events. [2023-09-01 09:13:49,543 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-09-01 09:13:49,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:13:49,543 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 09:13:49,543 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:13:49,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:13:49,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1098200406, now seen corresponding path program 1 times [2023-09-01 09:13:49,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:13:49,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242027783] [2023-09-01 09:13:49,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:13:49,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:13:49,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:13:49,606 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:13:49,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:13:49,659 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:13:49,659 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:13:49,659 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:13:49,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-09-01 09:13:49,660 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:13:49,660 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:13:49,660 WARN L233 ceAbstractionStarter]: 24 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:13:49,660 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 25 thread instances. [2023-09-01 09:13:49,909 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:13:49,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1557 places, 1682 transitions, 4089 flow [2023-09-01 09:13:50,870 INFO L130 PetriNetUnfolder]: 201/1980 cut-off events. [2023-09-01 09:13:50,871 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-09-01 09:13:51,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2381 conditions, 1980 events. 201/1980 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 10030 event pairs, 0 based on Foata normal form. 0/1703 useless extension candidates. Maximal degree in co-relation 2258. Up to 52 conditions per place. [2023-09-01 09:13:51,007 INFO L82 GeneralOperation]: Start removeDead. Operand has 1557 places, 1682 transitions, 4089 flow [2023-09-01 09:13:51,041 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1557 places, 1682 transitions, 4089 flow [2023-09-01 09:13:51,041 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:13:51,041 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1557 places, 1682 transitions, 4089 flow [2023-09-01 09:13:51,042 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1557 places, 1682 transitions, 4089 flow [2023-09-01 09:13:51,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1557 places, 1682 transitions, 4089 flow [2023-09-01 09:13:51,964 INFO L130 PetriNetUnfolder]: 201/1980 cut-off events. [2023-09-01 09:13:51,964 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-09-01 09:13:52,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2381 conditions, 1980 events. 201/1980 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 10030 event pairs, 0 based on Foata normal form. 0/1703 useless extension candidates. Maximal degree in co-relation 2258. Up to 52 conditions per place. [2023-09-01 09:13:52,946 INFO L119 LiptonReduction]: Number of co-enabled transitions 2616250 [2023-09-01 09:14:36,474 INFO L134 LiptonReduction]: Checked pairs total: 3852792 [2023-09-01 09:14:36,474 INFO L136 LiptonReduction]: Total number of compositions: 1440 [2023-09-01 09:14:36,476 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:14:36,476 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;@13624364, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:14:36,476 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:14:36,590 INFO L130 PetriNetUnfolder]: 175/654 cut-off events. [2023-09-01 09:14:36,590 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-09-01 09:14:36,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:14:36,590 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 09:14:36,590 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:14:36,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:14:36,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1168465692, now seen corresponding path program 1 times [2023-09-01 09:14:36,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:14:36,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678411297] [2023-09-01 09:14:36,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:14:36,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:14:36,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:14:36,651 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:14:36,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:14:36,707 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:14:36,707 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:14:36,707 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:14:36,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-09-01 09:14:36,707 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:14:36,708 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:14:36,708 WARN L233 ceAbstractionStarter]: 25 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:14:36,708 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 26 thread instances. [2023-09-01 09:14:36,968 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:14:36,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1618 places, 1748 transitions, 4276 flow [2023-09-01 09:14:38,362 INFO L130 PetriNetUnfolder]: 209/2058 cut-off events. [2023-09-01 09:14:38,362 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-09-01 09:14:38,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2488 conditions, 2058 events. 209/2058 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 10517 event pairs, 0 based on Foata normal form. 0/1770 useless extension candidates. Maximal degree in co-relation 2364. Up to 54 conditions per place. [2023-09-01 09:14:38,481 INFO L82 GeneralOperation]: Start removeDead. Operand has 1618 places, 1748 transitions, 4276 flow [2023-09-01 09:14:38,509 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1618 places, 1748 transitions, 4276 flow [2023-09-01 09:14:38,509 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:14:38,509 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1618 places, 1748 transitions, 4276 flow [2023-09-01 09:14:38,509 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1618 places, 1748 transitions, 4276 flow [2023-09-01 09:14:38,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1618 places, 1748 transitions, 4276 flow [2023-09-01 09:14:39,651 INFO L130 PetriNetUnfolder]: 209/2058 cut-off events. [2023-09-01 09:14:39,651 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-09-01 09:14:39,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2488 conditions, 2058 events. 209/2058 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 10517 event pairs, 0 based on Foata normal form. 0/1770 useless extension candidates. Maximal degree in co-relation 2364. Up to 54 conditions per place. [2023-09-01 09:14:40,334 INFO L119 LiptonReduction]: Number of co-enabled transitions 2832440 [2023-09-01 09:15:25,823 INFO L134 LiptonReduction]: Checked pairs total: 4627973 [2023-09-01 09:15:25,824 INFO L136 LiptonReduction]: Total number of compositions: 1502 [2023-09-01 09:15:25,825 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:15:25,826 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;@13624364, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:15:25,826 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:15:26,010 INFO L130 PetriNetUnfolder]: 182/687 cut-off events. [2023-09-01 09:15:26,010 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-09-01 09:15:26,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:15:26,010 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 09:15:26,010 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:15:26,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:15:26,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1341760593, now seen corresponding path program 1 times [2023-09-01 09:15:26,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:15:26,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023784981] [2023-09-01 09:15:26,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:15:26,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:15:26,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:15:26,086 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:15:26,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:15:26,150 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:15:26,152 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:15:26,152 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:15:26,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-09-01 09:15:26,152 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:15:26,153 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:15:26,153 WARN L233 ceAbstractionStarter]: 26 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:15:26,153 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 27 thread instances. [2023-09-01 09:15:26,449 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:15:26,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1679 places, 1814 transitions, 4465 flow [2023-09-01 09:15:27,808 INFO L130 PetriNetUnfolder]: 217/2136 cut-off events. [2023-09-01 09:15:27,808 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-09-01 09:15:27,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2596 conditions, 2136 events. 217/2136 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 10930 event pairs, 0 based on Foata normal form. 0/1837 useless extension candidates. Maximal degree in co-relation 2471. Up to 56 conditions per place. [2023-09-01 09:15:27,937 INFO L82 GeneralOperation]: Start removeDead. Operand has 1679 places, 1814 transitions, 4465 flow [2023-09-01 09:15:27,966 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1679 places, 1814 transitions, 4465 flow [2023-09-01 09:15:27,966 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:15:27,967 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1679 places, 1814 transitions, 4465 flow [2023-09-01 09:15:27,967 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1679 places, 1814 transitions, 4465 flow [2023-09-01 09:15:27,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1679 places, 1814 transitions, 4465 flow [2023-09-01 09:15:29,153 INFO L130 PetriNetUnfolder]: 217/2136 cut-off events. [2023-09-01 09:15:29,154 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-09-01 09:15:29,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2596 conditions, 2136 events. 217/2136 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 10930 event pairs, 0 based on Foata normal form. 0/1837 useless extension candidates. Maximal degree in co-relation 2471. Up to 56 conditions per place. [2023-09-01 09:15:29,960 INFO L119 LiptonReduction]: Number of co-enabled transitions 3057210 [2023-09-01 09:16:16,916 INFO L134 LiptonReduction]: Checked pairs total: 4578662 [2023-09-01 09:16:16,916 INFO L136 LiptonReduction]: Total number of compositions: 1551 [2023-09-01 09:16:16,917 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 09:16:16,918 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;@13624364, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:16:16,918 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 09:16:17,045 INFO L130 PetriNetUnfolder]: 189/707 cut-off events. [2023-09-01 09:16:17,046 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-09-01 09:16:17,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:16:17,046 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 09:16:17,046 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:16:17,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:16:17,046 INFO L85 PathProgramCache]: Analyzing trace with hash -938830795, now seen corresponding path program 1 times [2023-09-01 09:16:17,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:16:17,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455057896] [2023-09-01 09:16:17,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:16:17,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:16:17,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:16:17,110 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:16:17,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:16:17,172 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:16:17,172 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:16:17,172 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 09:16:17,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-09-01 09:16:17,172 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 09:16:17,173 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 09:16:17,173 WARN L233 ceAbstractionStarter]: 27 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 09:16:17,173 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 28 thread instances. [2023-09-01 09:16:17,464 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:16:17,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1740 places, 1880 transitions, 4656 flow [2023-09-01 09:16:18,693 INFO L130 PetriNetUnfolder]: 225/2214 cut-off events. [2023-09-01 09:16:18,693 INFO L131 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2023-09-01 09:16:18,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2705 conditions, 2214 events. 225/2214 cut-off events. For 4032/4032 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 11331 event pairs, 0 based on Foata normal form. 0/1904 useless extension candidates. Maximal degree in co-relation 2579. Up to 58 conditions per place. [2023-09-01 09:16:18,855 INFO L82 GeneralOperation]: Start removeDead. Operand has 1740 places, 1880 transitions, 4656 flow [2023-09-01 09:16:18,891 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1740 places, 1880 transitions, 4656 flow [2023-09-01 09:16:18,891 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:16:18,892 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1740 places, 1880 transitions, 4656 flow [2023-09-01 09:16:18,892 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1740 places, 1880 transitions, 4656 flow [2023-09-01 09:16:18,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1740 places, 1880 transitions, 4656 flow [2023-09-01 09:16:20,069 INFO L130 PetriNetUnfolder]: 225/2214 cut-off events. [2023-09-01 09:16:20,070 INFO L131 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2023-09-01 09:16:20,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2705 conditions, 2214 events. 225/2214 cut-off events. For 4032/4032 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 11331 event pairs, 0 based on Foata normal form. 0/1904 useless extension candidates. Maximal degree in co-relation 2579. Up to 58 conditions per place. [2023-09-01 09:16:21,283 INFO L119 LiptonReduction]: Number of co-enabled transitions 3290560 Killed by 15