./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/sigma.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b9d741-666a-4c73-9799-01bcf8345803/bin/ugemcutter-S3k5n7jwrD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b9d741-666a-4c73-9799-01bcf8345803/bin/ugemcutter-S3k5n7jwrD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b9d741-666a-4c73-9799-01bcf8345803/bin/ugemcutter-S3k5n7jwrD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b9d741-666a-4c73-9799-01bcf8345803/bin/ugemcutter-S3k5n7jwrD/config/GemCutterReach.xml -i ../../sv-benchmarks/c/pthread/sigma.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b9d741-666a-4c73-9799-01bcf8345803/bin/ugemcutter-S3k5n7jwrD/config/svcomp-Reach-32bit-GemCutter_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b9d741-666a-4c73-9799-01bcf8345803/bin/ugemcutter-S3k5n7jwrD --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 GemCutter --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 236a73c15e935747b9f2e95e881c26c921eba2f2ad7a2b23cf05552665b9f683 ...................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b9d741-666a-4c73-9799-01bcf8345803/bin/ugemcutter-S3k5n7jwrD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b9d741-666a-4c73-9799-01bcf8345803/bin/ugemcutter-S3k5n7jwrD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b9d741-666a-4c73-9799-01bcf8345803/bin/ugemcutter-S3k5n7jwrD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b9d741-666a-4c73-9799-01bcf8345803/bin/ugemcutter-S3k5n7jwrD/config/GemCutterReach.xml -i ../../sv-benchmarks/c/pthread/sigma.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b9d741-666a-4c73-9799-01bcf8345803/bin/ugemcutter-S3k5n7jwrD/config/svcomp-Reach-32bit-GemCutter_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b9d741-666a-4c73-9799-01bcf8345803/bin/ugemcutter-S3k5n7jwrD --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 GemCutter --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 236a73c15e935747b9f2e95e881c26c921eba2f2ad7a2b23cf05552665b9f683 ....................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: ERROR: TYPE ERROR --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-20 02:22:54,261 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-20 02:22:54,263 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-20 02:22:54,296 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-20 02:22:54,297 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-20 02:22:54,299 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-20 02:22:54,301 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-20 02:22:54,303 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-20 02:22:54,306 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-20 02:22:54,307 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-20 02:22:54,309 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-20 02:22:54,310 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-20 02:22:54,311 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-20 02:22:54,312 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-20 02:22:54,314 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-20 02:22:54,316 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-20 02:22:54,317 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-20 02:22:54,319 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-20 02:22:54,321 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-20 02:22:54,324 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-20 02:22:54,326 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-20 02:22:54,328 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-20 02:22:54,329 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-20 02:22:54,330 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-20 02:22:54,334 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-20 02:22:54,335 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-20 02:22:54,335 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-20 02:22:54,337 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-20 02:22:54,337 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-20 02:22:54,339 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-20 02:22:54,339 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-20 02:22:54,341 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-20 02:22:54,342 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-20 02:22:54,343 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-20 02:22:54,344 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-20 02:22:54,345 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-20 02:22:54,346 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-20 02:22:54,347 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-20 02:22:54,347 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-20 02:22:54,348 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-20 02:22:54,350 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-20 02:22:54,351 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b9d741-666a-4c73-9799-01bcf8345803/bin/ugemcutter-S3k5n7jwrD/config/svcomp-Reach-32bit-GemCutter_Default.epf [2021-10-20 02:22:54,375 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-20 02:22:54,376 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-20 02:22:54,376 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-20 02:22:54,377 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-20 02:22:54,378 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-20 02:22:54,381 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-20 02:22:54,381 INFO L138 SettingsManager]: * Use SBE=true [2021-10-20 02:22:54,382 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-20 02:22:54,382 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-20 02:22:54,382 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-20 02:22:54,382 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-20 02:22:54,383 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-20 02:22:54,383 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-20 02:22:54,385 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-20 02:22:54,385 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-20 02:22:54,385 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-20 02:22:54,385 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-20 02:22:54,386 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-20 02:22:54,386 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-20 02:22:54,386 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-20 02:22:54,386 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-20 02:22:54,387 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-10-20 02:22:54,387 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-20 02:22:54,388 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 02:22:54,388 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-20 02:22:54,388 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-20 02:22:54,388 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-20 02:22:54,389 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-20 02:22:54,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-20 02:22:54,390 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-20 02:22:54,391 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2021-10-20 02:22:54,391 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-20 02:22:54,391 INFO L138 SettingsManager]: * CEGAR restart behaviour=ONE_CEGAR_PER_THREAD_INSTANCE [2021-10-20 02:22:54,392 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=PERSISTENT_SLEEP_NEW_STATES_FIXEDORDER [2021-10-20 02:22:54,392 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b9d741-666a-4c73-9799-01bcf8345803/bin/ugemcutter-S3k5n7jwrD/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b9d741-666a-4c73-9799-01bcf8345803/bin/ugemcutter-S3k5n7jwrD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> GemCutter Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 236a73c15e935747b9f2e95e881c26c921eba2f2ad7a2b23cf05552665b9f683 [2021-10-20 02:22:54,647 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-20 02:22:54,685 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-20 02:22:54,687 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-20 02:22:54,689 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-20 02:22:54,690 INFO L275 PluginConnector]: CDTParser initialized [2021-10-20 02:22:54,691 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b9d741-666a-4c73-9799-01bcf8345803/bin/ugemcutter-S3k5n7jwrD/../../sv-benchmarks/c/pthread/sigma.i [2021-10-20 02:22:54,791 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b9d741-666a-4c73-9799-01bcf8345803/bin/ugemcutter-S3k5n7jwrD/data/a3ce972a3/2ea925b038df4e4ab6baec7635797454/FLAG9f862fc4a [2021-10-20 02:22:55,369 INFO L306 CDTParser]: Found 1 translation units. [2021-10-20 02:22:55,369 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b9d741-666a-4c73-9799-01bcf8345803/sv-benchmarks/c/pthread/sigma.i [2021-10-20 02:22:55,399 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b9d741-666a-4c73-9799-01bcf8345803/bin/ugemcutter-S3k5n7jwrD/data/a3ce972a3/2ea925b038df4e4ab6baec7635797454/FLAG9f862fc4a [2021-10-20 02:22:55,626 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b9d741-666a-4c73-9799-01bcf8345803/bin/ugemcutter-S3k5n7jwrD/data/a3ce972a3/2ea925b038df4e4ab6baec7635797454 [2021-10-20 02:22:55,632 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-20 02:22:55,634 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-20 02:22:55,638 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-20 02:22:55,638 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-20 02:22:55,641 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-20 02:22:55,642 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 02:22:55" (1/1) ... [2021-10-20 02:22:55,643 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73c90eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:22:55, skipping insertion in model container [2021-10-20 02:22:55,644 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 02:22:55" (1/1) ... [2021-10-20 02:22:55,652 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-20 02:22:55,705 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-20 02:22:56,259 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b9d741-666a-4c73-9799-01bcf8345803/sv-benchmarks/c/pthread/sigma.i[55285,55298] [2021-10-20 02:22:56,287 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 02:22:56,298 INFO L203 MainTranslator]: Completed pre-run [2021-10-20 02:22:56,359 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b9d741-666a-4c73-9799-01bcf8345803/sv-benchmarks/c/pthread/sigma.i[55285,55298] [2021-10-20 02:22:56,366 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 02:22:56,455 INFO L208 MainTranslator]: Completed translation [2021-10-20 02:22:56,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:22:56 WrapperNode [2021-10-20 02:22:56,456 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-20 02:22:56,457 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-20 02:22:56,457 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-20 02:22:56,458 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-20 02:22:56,464 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:22:56" (1/1) ... [2021-10-20 02:22:56,485 ERROR L1131 TypeChecker]: C: t [1130]: Undeclared identifier #t~mem11 in IdentifierExpression[#t~mem11,] [2021-10-20 02:22:56,486 ERROR L1131 TypeChecker]: C: pthread_create(&t[tid], 0, thread, 0) [1130]: Wrong parameter type at index 1: CallStatement[null,false,[],write~int,[IdentifierExpression[#t~pre10,],StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[#t~mem11,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[#t~mem11,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~tid~0,]]]]],IntegerLiteral[4]]] [2021-10-20 02:22:56,487 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:22:56" (1/1) ... [2021-10-20 02:22:56,488 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-20 02:22:56,488 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.preprocessor [2021-10-20 02:22:56,490 INFO L168 Benchmark]: Toolchain (without parser) took 855.08 ms. Allocated memory was 96.5 MB in the beginning and 130.0 MB in the end (delta: 33.6 MB). Free memory was 58.2 MB in the beginning and 79.8 MB in the end (delta: -21.6 MB). Peak memory consumption was 10.3 MB. Max. memory is 16.1 GB. [2021-10-20 02:22:56,491 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 96.5 MB. Free memory was 66.3 MB in the beginning and 66.3 MB in the end (delta: 29.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 02:22:56,492 INFO L168 Benchmark]: CACSL2BoogieTranslator took 818.54 ms. Allocated memory was 96.5 MB in the beginning and 130.0 MB in the end (delta: 33.6 MB). Free memory was 58.0 MB in the beginning and 81.3 MB in the end (delta: -23.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-20 02:22:56,493 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.41 ms. Allocated memory is still 130.0 MB. Free memory was 81.3 MB in the beginning and 79.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-20 02:22:56,496 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 96.5 MB. Free memory was 66.3 MB in the beginning and 66.3 MB in the end (delta: 29.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 818.54 ms. Allocated memory was 96.5 MB in the beginning and 130.0 MB in the end (delta: 33.6 MB). Free memory was 58.0 MB in the beginning and 81.3 MB in the end (delta: -23.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 30.41 ms. Allocated memory is still 130.0 MB. Free memory was 81.3 MB in the beginning and 79.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - TypeErrorResult [Line: 1130]: Type Error Undeclared identifier #t~mem11 in IdentifierExpression[#t~mem11,] - TypeErrorResult [Line: 1130]: Type Error Wrong parameter type at index 1: CallStatement[null,false,[],write~int,[IdentifierExpression[#t~pre10,],StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[#t~mem11,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[#t~mem11,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~tid~0,]]]]],IntegerLiteral[4]]] RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-e943c26 [2021-10-20 02:22:58,920 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-20 02:22:58,922 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-20 02:22:58,968 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-20 02:22:58,969 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-20 02:22:58,970 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-20 02:22:58,972 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-20 02:22:58,975 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-20 02:22:58,978 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-20 02:22:58,979 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-20 02:22:58,980 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-20 02:22:58,982 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-20 02:22:58,983 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-20 02:22:58,984 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-20 02:22:58,986 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-20 02:22:58,988 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-20 02:22:58,989 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-20 02:22:58,991 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-20 02:22:58,993 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-20 02:22:58,996 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-20 02:22:59,004 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-20 02:22:59,006 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-20 02:22:59,008 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-20 02:22:59,009 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-20 02:22:59,023 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-20 02:22:59,024 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-20 02:22:59,024 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-20 02:22:59,025 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-20 02:22:59,026 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-20 02:22:59,029 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-20 02:22:59,030 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-20 02:22:59,031 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-20 02:22:59,033 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-20 02:22:59,034 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-20 02:22:59,036 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-20 02:22:59,036 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-20 02:22:59,037 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-20 02:22:59,037 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-20 02:22:59,038 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-20 02:22:59,040 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-20 02:22:59,040 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-20 02:22:59,041 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b9d741-666a-4c73-9799-01bcf8345803/bin/ugemcutter-S3k5n7jwrD/config/svcomp-Reach-32bit-GemCutter_Bitvector.epf [2021-10-20 02:22:59,094 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-20 02:22:59,094 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-20 02:22:59,095 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-20 02:22:59,095 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-20 02:22:59,097 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-20 02:22:59,097 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-20 02:22:59,097 INFO L138 SettingsManager]: * Use SBE=true [2021-10-20 02:22:59,098 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-20 02:22:59,098 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-20 02:22:59,098 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-20 02:22:59,099 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-20 02:22:59,099 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-20 02:22:59,099 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-20 02:22:59,100 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-20 02:22:59,100 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-20 02:22:59,100 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-20 02:22:59,100 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-20 02:22:59,101 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-20 02:22:59,101 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-20 02:22:59,101 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-20 02:22:59,101 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-20 02:22:59,101 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-20 02:22:59,102 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-20 02:22:59,102 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 02:22:59,102 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-20 02:22:59,102 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-20 02:22:59,102 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-20 02:22:59,103 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-20 02:22:59,103 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-20 02:22:59,103 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-20 02:22:59,103 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2021-10-20 02:22:59,104 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-20 02:22:59,104 INFO L138 SettingsManager]: * CEGAR restart behaviour=ONE_CEGAR_PER_THREAD_INSTANCE [2021-10-20 02:22:59,104 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=PERSISTENT_SLEEP_NEW_STATES_FIXEDORDER [2021-10-20 02:22:59,104 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-20 02:22:59,104 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b9d741-666a-4c73-9799-01bcf8345803/bin/ugemcutter-S3k5n7jwrD/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b9d741-666a-4c73-9799-01bcf8345803/bin/ugemcutter-S3k5n7jwrD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> GemCutter Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 236a73c15e935747b9f2e95e881c26c921eba2f2ad7a2b23cf05552665b9f683 [2021-10-20 02:22:59,506 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-20 02:22:59,535 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-20 02:22:59,538 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-20 02:22:59,540 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-20 02:22:59,541 INFO L275 PluginConnector]: CDTParser initialized [2021-10-20 02:22:59,542 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b9d741-666a-4c73-9799-01bcf8345803/bin/ugemcutter-S3k5n7jwrD/../../sv-benchmarks/c/pthread/sigma.i [2021-10-20 02:22:59,613 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b9d741-666a-4c73-9799-01bcf8345803/bin/ugemcutter-S3k5n7jwrD/data/b22310e05/68ad2431b74f474e8a4af10de37239e6/FLAG6802570d3 [2021-10-20 02:23:00,210 INFO L306 CDTParser]: Found 1 translation units. [2021-10-20 02:23:00,211 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b9d741-666a-4c73-9799-01bcf8345803/sv-benchmarks/c/pthread/sigma.i [2021-10-20 02:23:00,249 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b9d741-666a-4c73-9799-01bcf8345803/bin/ugemcutter-S3k5n7jwrD/data/b22310e05/68ad2431b74f474e8a4af10de37239e6/FLAG6802570d3 [2021-10-20 02:23:00,470 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b9d741-666a-4c73-9799-01bcf8345803/bin/ugemcutter-S3k5n7jwrD/data/b22310e05/68ad2431b74f474e8a4af10de37239e6 [2021-10-20 02:23:00,472 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-20 02:23:00,473 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-20 02:23:00,475 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-20 02:23:00,475 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-20 02:23:00,482 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-20 02:23:00,483 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 02:23:00" (1/1) ... [2021-10-20 02:23:00,484 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4457eca2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:23:00, skipping insertion in model container [2021-10-20 02:23:00,484 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 02:23:00" (1/1) ... [2021-10-20 02:23:00,493 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-20 02:23:00,576 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-20 02:23:01,217 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b9d741-666a-4c73-9799-01bcf8345803/sv-benchmarks/c/pthread/sigma.i[55285,55298] [2021-10-20 02:23:01,241 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 02:23:01,254 INFO L203 MainTranslator]: Completed pre-run [2021-10-20 02:23:01,297 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b9d741-666a-4c73-9799-01bcf8345803/sv-benchmarks/c/pthread/sigma.i[55285,55298] [2021-10-20 02:23:01,304 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 02:23:01,433 INFO L208 MainTranslator]: Completed translation [2021-10-20 02:23:01,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:23:01 WrapperNode [2021-10-20 02:23:01,434 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-20 02:23:01,436 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-20 02:23:01,436 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-20 02:23:01,437 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-20 02:23:01,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:23:01" (1/1) ... [2021-10-20 02:23:01,488 ERROR L1131 TypeChecker]: C: t [1130]: Undeclared identifier #t~mem11 in IdentifierExpression[#t~mem11,] [2021-10-20 02:23:01,491 ERROR L1131 TypeChecker]: C: pthread_create(&t[tid], 0, thread, 0) [1130]: Wrong parameter type at index 1: CallStatement[null,false,[],write~intINTTYPE4,[IdentifierExpression[#t~pre10,],StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[#t~mem11,],base],FunctionApplication[~bvadd32,[StructAccessExpression[IdentifierExpression[#t~mem11,],offset],FunctionApplication[~bvmul32,[BitvecLiteral[4,32],IdentifierExpression[~tid~0,]]]]]]],BitvecLiteral[4,32]]] [2021-10-20 02:23:01,493 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:23:01" (1/1) ... [2021-10-20 02:23:01,504 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-20 02:23:01,505 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.preprocessor [2021-10-20 02:23:01,507 INFO L168 Benchmark]: Toolchain (without parser) took 1032.24 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 30.8 MB in the beginning and 39.2 MB in the end (delta: -8.4 MB). Peak memory consumption was 829.3 kB. Max. memory is 16.1 GB. [2021-10-20 02:23:01,508 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 54.5 MB. Free memory was 36.3 MB in the beginning and 36.2 MB in the end (delta: 73.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 02:23:01,509 INFO L168 Benchmark]: CACSL2BoogieTranslator took 960.09 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 30.5 MB in the beginning and 40.7 MB in the end (delta: -10.2 MB). Peak memory consumption was 13.4 MB. Max. memory is 16.1 GB. [2021-10-20 02:23:01,510 INFO L168 Benchmark]: Boogie Procedure Inliner took 68.70 ms. Allocated memory is still 67.1 MB. Free memory was 40.7 MB in the beginning and 39.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 02:23:01,513 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 54.5 MB. Free memory was 36.3 MB in the beginning and 36.2 MB in the end (delta: 73.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 960.09 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 30.5 MB in the beginning and 40.7 MB in the end (delta: -10.2 MB). Peak memory consumption was 13.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 68.70 ms. Allocated memory is still 67.1 MB. Free memory was 40.7 MB in the beginning and 39.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - TypeErrorResult [Line: 1130]: Type Error Undeclared identifier #t~mem11 in IdentifierExpression[#t~mem11,] - TypeErrorResult [Line: 1130]: Type Error Wrong parameter type at index 1: CallStatement[null,false,[],write~intINTTYPE4,[IdentifierExpression[#t~pre10,],StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[#t~mem11,],base],FunctionApplication[~bvadd32,[StructAccessExpression[IdentifierExpression[#t~mem11,],offset],FunctionApplication[~bvmul32,[BitvecLiteral[4,32],IdentifierExpression[~tid~0,]]]]]]],BitvecLiteral[4,32]]] RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...