./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-complex/bounded_buffer.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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 ../sv-benchmarks/c/pthread-complex/bounded_buffer.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 6780d9b269575eab8bb01b5a192a21fa771f6fcc4c495cab5abe1df10d7681d5 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 21:51:47,538 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 21:51:47,539 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 21:51:47,570 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 21:51:47,571 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 21:51:47,572 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 21:51:47,573 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 21:51:47,577 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 21:51:47,579 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 21:51:47,580 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 21:51:47,582 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 21:51:47,585 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 21:51:47,585 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 21:51:47,591 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 21:51:47,593 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 21:51:47,595 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 21:51:47,597 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 21:51:47,599 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 21:51:47,601 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 21:51:47,607 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 21:51:47,609 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 21:51:47,613 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 21:51:47,614 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 21:51:47,615 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 21:51:47,615 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 21:51:47,617 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 21:51:47,621 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 21:51:47,621 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 21:51:47,622 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 21:51:47,622 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 21:51:47,623 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 21:51:47,624 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 21:51:47,625 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 21:51:47,626 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 21:51:47,627 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 21:51:47,628 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 21:51:47,628 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 21:51:47,629 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 21:51:47,629 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 21:51:47,629 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 21:51:47,630 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 21:51:47,630 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 21:51:47,632 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 21:51:47,662 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 21:51:47,662 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 21:51:47,663 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 21:51:47,663 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 21:51:47,664 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 21:51:47,664 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 21:51:47,664 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 21:51:47,665 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 21:51:47,665 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 21:51:47,666 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 21:51:47,666 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 21:51:47,666 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 21:51:47,666 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 21:51:47,667 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 21:51:47,667 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 21:51:47,667 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 21:51:47,667 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 21:51:47,667 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 21:51:47,668 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 21:51:47,668 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 21:51:47,668 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 21:51:47,668 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 21:51:47,668 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 21:51:47,669 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 21:51:47,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:51:47,669 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 21:51:47,669 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 21:51:47,669 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 21:51:47,670 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 21:51:47,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 21:51:47,670 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 21:51:47,670 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 21:51:47,671 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 21:51:47,671 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6780d9b269575eab8bb01b5a192a21fa771f6fcc4c495cab5abe1df10d7681d5 [2022-07-13 21:51:47,906 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 21:51:47,926 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 21:51:47,928 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 21:51:47,929 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 21:51:47,930 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 21:51:47,931 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-complex/bounded_buffer.i [2022-07-13 21:51:47,992 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e7cb04a5/3b650b0ed8124c8c97d774205c948339/FLAG560c3d38a [2022-07-13 21:51:48,469 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 21:51:48,470 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/bounded_buffer.i [2022-07-13 21:51:48,485 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e7cb04a5/3b650b0ed8124c8c97d774205c948339/FLAG560c3d38a [2022-07-13 21:51:48,497 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e7cb04a5/3b650b0ed8124c8c97d774205c948339 [2022-07-13 21:51:48,499 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 21:51:48,500 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 21:51:48,501 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 21:51:48,502 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 21:51:48,504 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 21:51:48,505 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:51:48" (1/1) ... [2022-07-13 21:51:48,506 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2530ea63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:51:48, skipping insertion in model container [2022-07-13 21:51:48,506 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:51:48" (1/1) ... [2022-07-13 21:51:48,512 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 21:51:48,549 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 21:51:49,064 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/bounded_buffer.i[70002,70015] [2022-07-13 21:51:49,091 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:51:49,100 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 21:51:49,159 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/bounded_buffer.i[70002,70015] [2022-07-13 21:51:49,172 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:51:49,298 INFO L208 MainTranslator]: Completed translation [2022-07-13 21:51:49,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:51:49 WrapperNode [2022-07-13 21:51:49,299 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 21:51:49,300 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 21:51:49,300 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 21:51:49,301 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 21:51:49,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:51:49" (1/1) ... [2022-07-13 21:51:49,355 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:51:49" (1/1) ... [2022-07-13 21:51:49,386 INFO L137 Inliner]: procedures = 428, calls = 126, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 478 [2022-07-13 21:51:49,386 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 21:51:49,387 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 21:51:49,387 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 21:51:49,387 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 21:51:49,394 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:51:49" (1/1) ... [2022-07-13 21:51:49,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:51:49" (1/1) ... [2022-07-13 21:51:49,400 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:51:49" (1/1) ... [2022-07-13 21:51:49,409 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:51:49" (1/1) ... [2022-07-13 21:51:49,425 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:51:49" (1/1) ... [2022-07-13 21:51:49,431 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:51:49" (1/1) ... [2022-07-13 21:51:49,434 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:51:49" (1/1) ... [2022-07-13 21:51:49,438 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 21:51:49,439 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 21:51:49,439 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 21:51:49,439 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 21:51:49,440 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:51:49" (1/1) ... [2022-07-13 21:51:49,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:51:49,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:51:49,480 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) [2022-07-13 21:51:49,492 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 [2022-07-13 21:51:49,515 INFO L130 BoogieDeclarations]: Found specification of procedure producer_routine [2022-07-13 21:51:49,516 INFO L138 BoogieDeclarations]: Found implementation of procedure producer_routine [2022-07-13 21:51:49,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 21:51:49,516 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 21:51:49,516 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-13 21:51:49,516 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-13 21:51:49,516 INFO L130 BoogieDeclarations]: Found specification of procedure fflush [2022-07-13 21:51:49,516 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 21:51:49,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-13 21:51:49,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 21:51:49,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 21:51:49,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 21:51:49,517 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-13 21:51:49,517 INFO L130 BoogieDeclarations]: Found specification of procedure consumer_routine [2022-07-13 21:51:49,517 INFO L138 BoogieDeclarations]: Found implementation of procedure consumer_routine [2022-07-13 21:51:49,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 21:51:49,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 21:51:49,519 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-13 21:51:49,658 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 21:51:49,660 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 21:51:50,263 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 21:51:50,274 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 21:51:50,274 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2022-07-13 21:51:50,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:51:50 BoogieIcfgContainer [2022-07-13 21:51:50,277 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 21:51:50,279 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 21:51:50,279 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 21:51:50,283 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 21:51:50,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 09:51:48" (1/3) ... [2022-07-13 21:51:50,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bdb4f09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:51:50, skipping insertion in model container [2022-07-13 21:51:50,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:51:49" (2/3) ... [2022-07-13 21:51:50,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bdb4f09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:51:50, skipping insertion in model container [2022-07-13 21:51:50,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:51:50" (3/3) ... [2022-07-13 21:51:50,285 INFO L111 eAbstractionObserver]: Analyzing ICFG bounded_buffer.i [2022-07-13 21:51:50,289 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 21:51:50,297 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 21:51:50,298 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 21:51:50,298 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 21:51:50,441 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-13 21:51:50,497 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 455 places, 504 transitions, 1030 flow [2022-07-13 21:51:50,812 INFO L129 PetriNetUnfolder]: 122/1098 cut-off events. [2022-07-13 21:51:50,812 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-13 21:51:50,843 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1118 conditions, 1098 events. 122/1098 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6668 event pairs, 0 based on Foata normal form. 0/968 useless extension candidates. Maximal degree in co-relation 578. Up to 16 conditions per place. [2022-07-13 21:51:50,843 INFO L82 GeneralOperation]: Start removeDead. Operand has 455 places, 504 transitions, 1030 flow [2022-07-13 21:51:50,878 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 455 places, 504 transitions, 1030 flow [2022-07-13 21:51:50,893 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:51:50,900 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2c4c749f, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@212e5df6 [2022-07-13 21:51:50,900 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-13 21:51:50,918 INFO L129 PetriNetUnfolder]: 19/184 cut-off events. [2022-07-13 21:51:50,919 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 21:51:50,919 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:51:50,921 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:51:50,921 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [consumer_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 21:51:50,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:51:50,926 INFO L85 PathProgramCache]: Analyzing trace with hash 13293357, now seen corresponding path program 1 times [2022-07-13 21:51:50,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:51:50,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104698180] [2022-07-13 21:51:50,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:51:50,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:51:51,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:51:51,254 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-13 21:51:51,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:51:51,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104698180] [2022-07-13 21:51:51,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104698180] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:51:51,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:51:51,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 21:51:51,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161590724] [2022-07-13 21:51:51,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:51:51,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 21:51:51,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:51:51,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 21:51:51,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:51:51,315 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 461 out of 504 [2022-07-13 21:51:51,328 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 504 transitions, 1030 flow. Second operand has 5 states, 5 states have (on average 462.6) internal successors, (2313), 5 states have internal predecessors, (2313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:51:51,328 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:51:51,329 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 461 of 504 [2022-07-13 21:51:51,330 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:51:51,670 INFO L129 PetriNetUnfolder]: 87/1060 cut-off events. [2022-07-13 21:51:51,671 INFO L130 PetriNetUnfolder]: For 33/49 co-relation queries the response was YES. [2022-07-13 21:51:51,691 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1128 conditions, 1060 events. 87/1060 cut-off events. For 33/49 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 6480 event pairs, 0 based on Foata normal form. 63/1028 useless extension candidates. Maximal degree in co-relation 571. Up to 39 conditions per place. [2022-07-13 21:51:51,701 INFO L132 encePairwiseOnDemand]: 487/504 looper letters, 25 selfloop transitions, 4 changer transitions 0/489 dead transitions. [2022-07-13 21:51:51,702 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 489 transitions, 1058 flow [2022-07-13 21:51:51,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 21:51:51,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-13 21:51:51,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2352 transitions. [2022-07-13 21:51:51,726 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9333333333333333 [2022-07-13 21:51:51,727 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2352 transitions. [2022-07-13 21:51:51,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2352 transitions. [2022-07-13 21:51:51,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:51:51,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2352 transitions. [2022-07-13 21:51:51,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 470.4) internal successors, (2352), 5 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:51:51,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 504.0) internal successors, (3024), 6 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:51:51,757 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 504.0) internal successors, (3024), 6 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:51:51,759 INFO L186 Difference]: Start difference. First operand has 455 places, 504 transitions, 1030 flow. Second operand 5 states and 2352 transitions. [2022-07-13 21:51:51,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 489 transitions, 1058 flow [2022-07-13 21:51:51,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 489 transitions, 1058 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:51:51,781 INFO L242 Difference]: Finished difference. Result has 457 places, 489 transitions, 1008 flow [2022-07-13 21:51:51,784 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=504, PETRI_DIFFERENCE_MINUEND_FLOW=1000, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1008, PETRI_PLACES=457, PETRI_TRANSITIONS=489} [2022-07-13 21:51:51,789 INFO L279 CegarLoopForPetriNet]: 455 programPoint places, 2 predicate places. [2022-07-13 21:51:51,790 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 489 transitions, 1008 flow [2022-07-13 21:51:51,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 462.6) internal successors, (2313), 5 states have internal predecessors, (2313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:51:51,792 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:51:51,793 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:51:51,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 21:51:51,793 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [consumer_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 21:51:51,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:51:51,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1703216025, now seen corresponding path program 1 times [2022-07-13 21:51:51,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:51:51,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907317805] [2022-07-13 21:51:51,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:51:51,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:51:51,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:51:51,906 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-13 21:51:51,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:51:51,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907317805] [2022-07-13 21:51:51,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907317805] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:51:51,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:51:51,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:51:51,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797112507] [2022-07-13 21:51:51,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:51:51,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:51:51,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:51:51,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:51:51,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:51:51,916 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 471 out of 504 [2022-07-13 21:51:51,923 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 489 transitions, 1008 flow. Second operand has 3 states, 3 states have (on average 473.0) internal successors, (1419), 3 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:51:51,923 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:51:51,924 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 471 of 504 [2022-07-13 21:51:51,924 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:51:52,186 INFO L129 PetriNetUnfolder]: 84/1054 cut-off events. [2022-07-13 21:51:52,186 INFO L130 PetriNetUnfolder]: For 33/37 co-relation queries the response was YES. [2022-07-13 21:51:52,204 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1102 conditions, 1054 events. 84/1054 cut-off events. For 33/37 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 6385 event pairs, 0 based on Foata normal form. 0/962 useless extension candidates. Maximal degree in co-relation 1052. Up to 18 conditions per place. [2022-07-13 21:51:52,211 INFO L132 encePairwiseOnDemand]: 500/504 looper letters, 13 selfloop transitions, 1 changer transitions 0/483 dead transitions. [2022-07-13 21:51:52,212 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 483 transitions, 1024 flow [2022-07-13 21:51:52,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:51:52,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:51:52,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1430 transitions. [2022-07-13 21:51:52,215 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9457671957671958 [2022-07-13 21:51:52,216 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1430 transitions. [2022-07-13 21:51:52,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1430 transitions. [2022-07-13 21:51:52,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:51:52,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1430 transitions. [2022-07-13 21:51:52,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 476.6666666666667) internal successors, (1430), 3 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:51:52,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 504.0) internal successors, (2016), 4 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:51:52,224 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 504.0) internal successors, (2016), 4 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:51:52,224 INFO L186 Difference]: Start difference. First operand has 457 places, 489 transitions, 1008 flow. Second operand 3 states and 1430 transitions. [2022-07-13 21:51:52,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 483 transitions, 1024 flow [2022-07-13 21:51:52,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 483 transitions, 1016 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-13 21:51:52,234 INFO L242 Difference]: Finished difference. Result has 452 places, 483 transitions, 990 flow [2022-07-13 21:51:52,235 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=504, PETRI_DIFFERENCE_MINUEND_FLOW=988, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=990, PETRI_PLACES=452, PETRI_TRANSITIONS=483} [2022-07-13 21:51:52,236 INFO L279 CegarLoopForPetriNet]: 455 programPoint places, -3 predicate places. [2022-07-13 21:51:52,236 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 483 transitions, 990 flow [2022-07-13 21:51:52,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 473.0) internal successors, (1419), 3 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:51:52,237 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:51:52,237 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2022-07-13 21:51:52,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 21:51:52,238 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [consumer_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 21:51:52,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:51:52,239 INFO L85 PathProgramCache]: Analyzing trace with hash 688471773, now seen corresponding path program 1 times [2022-07-13 21:51:52,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:51:52,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962443341] [2022-07-13 21:51:52,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:51:52,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:51:52,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:51:52,357 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-13 21:51:52,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:51:52,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962443341] [2022-07-13 21:51:52,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962443341] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:51:52,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:51:52,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 21:51:52,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598190620] [2022-07-13 21:51:52,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:51:52,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 21:51:52,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:51:52,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 21:51:52,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:51:52,364 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 435 out of 504 [2022-07-13 21:51:52,366 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 483 transitions, 990 flow. Second operand has 5 states, 5 states have (on average 438.8) internal successors, (2194), 5 states have internal predecessors, (2194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:51:52,366 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:51:52,366 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 435 of 504 [2022-07-13 21:51:52,367 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:51:55,303 INFO L129 PetriNetUnfolder]: 2919/15709 cut-off events. [2022-07-13 21:51:55,303 INFO L130 PetriNetUnfolder]: For 140/228 co-relation queries the response was YES. [2022-07-13 21:51:55,428 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18791 conditions, 15709 events. 2919/15709 cut-off events. For 140/228 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 182904 event pairs, 1464 based on Foata normal form. 0/14009 useless extension candidates. Maximal degree in co-relation 18760. Up to 2942 conditions per place. [2022-07-13 21:51:55,573 INFO L132 encePairwiseOnDemand]: 496/504 looper letters, 49 selfloop transitions, 6 changer transitions 1/483 dead transitions. [2022-07-13 21:51:55,573 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 483 transitions, 1102 flow [2022-07-13 21:51:55,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 21:51:55,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-13 21:51:55,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2232 transitions. [2022-07-13 21:51:55,580 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8857142857142857 [2022-07-13 21:51:55,580 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2232 transitions. [2022-07-13 21:51:55,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2232 transitions. [2022-07-13 21:51:55,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:51:55,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2232 transitions. [2022-07-13 21:51:55,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 446.4) internal successors, (2232), 5 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:51:55,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 504.0) internal successors, (3024), 6 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:51:55,592 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 504.0) internal successors, (3024), 6 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:51:55,593 INFO L186 Difference]: Start difference. First operand has 452 places, 483 transitions, 990 flow. Second operand 5 states and 2232 transitions. [2022-07-13 21:51:55,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 483 transitions, 1102 flow [2022-07-13 21:51:55,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 483 transitions, 1101 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:51:55,602 INFO L242 Difference]: Finished difference. Result has 454 places, 482 transitions, 1010 flow [2022-07-13 21:51:55,603 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=504, PETRI_DIFFERENCE_MINUEND_FLOW=983, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1010, PETRI_PLACES=454, PETRI_TRANSITIONS=482} [2022-07-13 21:51:55,605 INFO L279 CegarLoopForPetriNet]: 455 programPoint places, -1 predicate places. [2022-07-13 21:51:55,606 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 482 transitions, 1010 flow [2022-07-13 21:51:55,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 438.8) internal successors, (2194), 5 states have internal predecessors, (2194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:51:55,607 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:51:55,608 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:51:55,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 21:51:55,608 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [consumer_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 21:51:55,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:51:55,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1704620567, now seen corresponding path program 1 times [2022-07-13 21:51:55,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:51:55,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55518153] [2022-07-13 21:51:55,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:51:55,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:51:55,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:51:55,712 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:51:55,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:51:55,808 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:51:55,809 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:51:55,810 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-13 21:51:55,811 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location consumer_routineErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-13 21:51:55,812 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-07-13 21:51:55,812 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location consumer_routineErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-13 21:51:55,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 21:51:55,812 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-13 21:51:55,816 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:51:55,816 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-13 21:51:55,926 INFO L135 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2022-07-13 21:51:55,931 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 697 places, 774 transitions, 1596 flow [2022-07-13 21:51:56,998 INFO L129 PetriNetUnfolder]: 430/3582 cut-off events. [2022-07-13 21:51:56,998 INFO L130 PetriNetUnfolder]: For 72/84 co-relation queries the response was YES. [2022-07-13 21:51:57,180 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3679 conditions, 3582 events. 430/3582 cut-off events. For 72/84 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 29170 event pairs, 2 based on Foata normal form. 0/3159 useless extension candidates. Maximal degree in co-relation 2004. Up to 64 conditions per place. [2022-07-13 21:51:57,180 INFO L82 GeneralOperation]: Start removeDead. Operand has 697 places, 774 transitions, 1596 flow [2022-07-13 21:51:57,238 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 697 places, 774 transitions, 1596 flow [2022-07-13 21:51:57,239 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:51:57,241 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2c4c749f, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@212e5df6 [2022-07-13 21:51:57,241 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-13 21:51:57,272 INFO L129 PetriNetUnfolder]: 39/412 cut-off events. [2022-07-13 21:51:57,272 INFO L130 PetriNetUnfolder]: For 11/13 co-relation queries the response was YES. [2022-07-13 21:51:57,273 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:51:57,273 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:51:57,276 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [consumer_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 21:51:57,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:51:57,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1094861806, now seen corresponding path program 1 times [2022-07-13 21:51:57,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:51:57,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952574473] [2022-07-13 21:51:57,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:51:57,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:51:57,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:51:57,353 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-13 21:51:57,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:51:57,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952574473] [2022-07-13 21:51:57,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952574473] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:51:57,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:51:57,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 21:51:57,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538659164] [2022-07-13 21:51:57,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:51:57,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 21:51:57,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:51:57,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 21:51:57,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:51:57,364 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 719 out of 774 [2022-07-13 21:51:57,367 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 697 places, 774 transitions, 1596 flow. Second operand has 5 states, 5 states have (on average 720.8) internal successors, (3604), 5 states have internal predecessors, (3604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:51:57,368 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:51:57,368 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 719 of 774 [2022-07-13 21:51:57,368 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:51:58,575 INFO L129 PetriNetUnfolder]: 315/3460 cut-off events. [2022-07-13 21:51:58,576 INFO L130 PetriNetUnfolder]: For 230/287 co-relation queries the response was YES. [2022-07-13 21:51:58,683 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3708 conditions, 3460 events. 315/3460 cut-off events. For 230/287 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 28761 event pairs, 1 based on Foata normal form. 411/3563 useless extension candidates. Maximal degree in co-relation 2017. Up to 130 conditions per place. [2022-07-13 21:51:58,719 INFO L132 encePairwiseOnDemand]: 752/774 looper letters, 31 selfloop transitions, 4 changer transitions 0/753 dead transitions. [2022-07-13 21:51:58,719 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 698 places, 753 transitions, 1624 flow [2022-07-13 21:51:58,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 21:51:58,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-13 21:51:58,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3658 transitions. [2022-07-13 21:51:58,726 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.945219638242894 [2022-07-13 21:51:58,727 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3658 transitions. [2022-07-13 21:51:58,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3658 transitions. [2022-07-13 21:51:58,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:51:58,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3658 transitions. [2022-07-13 21:51:58,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 731.6) internal successors, (3658), 5 states have internal predecessors, (3658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:51:58,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 774.0) internal successors, (4644), 6 states have internal predecessors, (4644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:51:58,745 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 774.0) internal successors, (4644), 6 states have internal predecessors, (4644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:51:58,745 INFO L186 Difference]: Start difference. First operand has 697 places, 774 transitions, 1596 flow. Second operand 5 states and 3658 transitions. [2022-07-13 21:51:58,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 698 places, 753 transitions, 1624 flow [2022-07-13 21:51:58,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 698 places, 753 transitions, 1624 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:51:58,758 INFO L242 Difference]: Finished difference. Result has 698 places, 753 transitions, 1562 flow [2022-07-13 21:51:58,760 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=774, PETRI_DIFFERENCE_MINUEND_FLOW=1554, PETRI_DIFFERENCE_MINUEND_PLACES=694, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=753, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=749, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1562, PETRI_PLACES=698, PETRI_TRANSITIONS=753} [2022-07-13 21:51:58,761 INFO L279 CegarLoopForPetriNet]: 697 programPoint places, 1 predicate places. [2022-07-13 21:51:58,762 INFO L495 AbstractCegarLoop]: Abstraction has has 698 places, 753 transitions, 1562 flow [2022-07-13 21:51:58,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 720.8) internal successors, (3604), 5 states have internal predecessors, (3604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:51:58,764 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:51:58,764 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:51:58,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 21:51:58,765 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [consumer_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 21:51:58,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:51:58,765 INFO L85 PathProgramCache]: Analyzing trace with hash -409247448, now seen corresponding path program 1 times [2022-07-13 21:51:58,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:51:58,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703205391] [2022-07-13 21:51:58,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:51:58,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:51:58,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:51:58,817 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-13 21:51:58,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:51:58,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703205391] [2022-07-13 21:51:58,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703205391] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:51:58,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:51:58,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:51:58,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991867767] [2022-07-13 21:51:58,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:51:58,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:51:58,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:51:58,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:51:58,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:51:58,823 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 729 out of 774 [2022-07-13 21:51:58,826 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 698 places, 753 transitions, 1562 flow. Second operand has 3 states, 3 states have (on average 731.3333333333334) internal successors, (2194), 3 states have internal predecessors, (2194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:51:58,826 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:51:58,826 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 729 of 774 [2022-07-13 21:51:58,826 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:51:59,758 INFO L129 PetriNetUnfolder]: 312/3454 cut-off events. [2022-07-13 21:51:59,758 INFO L130 PetriNetUnfolder]: For 224/245 co-relation queries the response was YES. [2022-07-13 21:51:59,869 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3652 conditions, 3454 events. 312/3454 cut-off events. For 224/245 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 28734 event pairs, 1 based on Foata normal form. 0/3149 useless extension candidates. Maximal degree in co-relation 3540. Up to 79 conditions per place. [2022-07-13 21:51:59,898 INFO L132 encePairwiseOnDemand]: 770/774 looper letters, 19 selfloop transitions, 1 changer transitions 0/747 dead transitions. [2022-07-13 21:51:59,898 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 697 places, 747 transitions, 1590 flow [2022-07-13 21:51:59,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:51:59,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:51:59,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2210 transitions. [2022-07-13 21:51:59,904 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9517657192075797 [2022-07-13 21:51:59,905 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2210 transitions. [2022-07-13 21:51:59,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2210 transitions. [2022-07-13 21:51:59,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:51:59,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2210 transitions. [2022-07-13 21:51:59,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 736.6666666666666) internal successors, (2210), 3 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:51:59,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 774.0) internal successors, (3096), 4 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:51:59,915 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 774.0) internal successors, (3096), 4 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:51:59,915 INFO L186 Difference]: Start difference. First operand has 698 places, 753 transitions, 1562 flow. Second operand 3 states and 2210 transitions. [2022-07-13 21:51:59,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 697 places, 747 transitions, 1590 flow [2022-07-13 21:51:59,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 693 places, 747 transitions, 1582 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-13 21:51:59,926 INFO L242 Difference]: Finished difference. Result has 693 places, 747 transitions, 1544 flow [2022-07-13 21:51:59,928 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=774, PETRI_DIFFERENCE_MINUEND_FLOW=1542, PETRI_DIFFERENCE_MINUEND_PLACES=691, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=747, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=746, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1544, PETRI_PLACES=693, PETRI_TRANSITIONS=747} [2022-07-13 21:51:59,928 INFO L279 CegarLoopForPetriNet]: 697 programPoint places, -4 predicate places. [2022-07-13 21:51:59,929 INFO L495 AbstractCegarLoop]: Abstraction has has 693 places, 747 transitions, 1544 flow [2022-07-13 21:51:59,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 731.3333333333334) internal successors, (2194), 3 states have internal predecessors, (2194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:51:59,930 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:51:59,930 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:51:59,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 21:51:59,931 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [consumer_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 21:51:59,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:51:59,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1207477274, now seen corresponding path program 1 times [2022-07-13 21:51:59,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:51:59,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715505525] [2022-07-13 21:51:59,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:51:59,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:51:59,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:52:00,009 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-13 21:52:00,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:52:00,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715505525] [2022-07-13 21:52:00,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715505525] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:52:00,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:52:00,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 21:52:00,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788278619] [2022-07-13 21:52:00,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:52:00,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 21:52:00,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:52:00,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 21:52:00,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:52:00,016 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 679 out of 774 [2022-07-13 21:52:00,024 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 693 places, 747 transitions, 1544 flow. Second operand has 5 states, 5 states have (on average 683.0) internal successors, (3415), 5 states have internal predecessors, (3415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:52:00,025 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:52:00,025 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 679 of 774 [2022-07-13 21:52:00,025 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand