./Ultimate.py --spec ../../sv-benchmarks/c/Systems_DeviceDriversLinux64_ReachSafety.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_bitvector_linux-3.16-rc1.tar.xz-43_2a-net--atm--lec.ko-entry_point_false-unreach-call.cil.out.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_2d8d9e2b-508b-471b-9c7e-88ded1e22a2e/bin-2019/ukojak/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_2d8d9e2b-508b-471b-9c7e-88ded1e22a2e/bin-2019/ukojak/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_2d8d9e2b-508b-471b-9c7e-88ded1e22a2e/bin-2019/ukojak/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_2d8d9e2b-508b-471b-9c7e-88ded1e22a2e/bin-2019/ukojak/config/KojakReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_bitvector_linux-3.16-rc1.tar.xz-43_2a-net--atm--lec.ko-entry_point_false-unreach-call.cil.out.c -s /tmp/vcloud-vcloud-master/worker/working_dir_2d8d9e2b-508b-471b-9c7e-88ded1e22a2e/bin-2019/ukojak/config/svcomp-Reach-64bit-Kojak_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_2d8d9e2b-508b-471b-9c7e-88ded1e22a2e/bin-2019/ukojak --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Kojak --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 9b86cf05538087e5ba57515a88c875520d7bbb97 .......................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_2d8d9e2b-508b-471b-9c7e-88ded1e22a2e/bin-2019/ukojak/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_2d8d9e2b-508b-471b-9c7e-88ded1e22a2e/bin-2019/ukojak/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_2d8d9e2b-508b-471b-9c7e-88ded1e22a2e/bin-2019/ukojak/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_2d8d9e2b-508b-471b-9c7e-88ded1e22a2e/bin-2019/ukojak/config/KojakReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_bitvector_linux-3.16-rc1.tar.xz-43_2a-net--atm--lec.ko-entry_point_false-unreach-call.cil.out.c -s /tmp/vcloud-vcloud-master/worker/working_dir_2d8d9e2b-508b-471b-9c7e-88ded1e22a2e/bin-2019/ukojak/config/svcomp-Reach-64bit-Kojak_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_2d8d9e2b-508b-471b-9c7e-88ded1e22a2e/bin-2019/ukojak --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Kojak --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 9b86cf05538087e5ba57515a88c875520d7bbb97 ............................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: ClassCastException: de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.container.c.CPointer cannot be cast to de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.container.c.CPrimitive --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-10-26 20:20:03,498 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 20:20:03,500 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 20:20:03,511 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 20:20:03,512 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 20:20:03,513 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 20:20:03,515 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 20:20:03,517 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 20:20:03,519 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 20:20:03,521 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 20:20:03,524 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 20:20:03,524 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 20:20:03,525 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 20:20:03,526 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 20:20:03,527 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 20:20:03,528 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 20:20:03,528 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 20:20:03,529 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 20:20:03,531 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 20:20:03,532 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 20:20:03,533 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 20:20:03,534 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 20:20:03,536 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 20:20:03,536 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 20:20:03,536 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 20:20:03,537 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 20:20:03,537 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 20:20:03,539 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 20:20:03,540 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 20:20:03,540 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 20:20:03,541 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 20:20:03,541 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-26 20:20:03,541 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-26 20:20:03,541 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-26 20:20:03,543 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-26 20:20:03,544 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-26 20:20:03,544 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_2d8d9e2b-508b-471b-9c7e-88ded1e22a2e/bin-2019/ukojak/config/svcomp-Reach-64bit-Kojak_Default.epf [2018-10-26 20:20:03,554 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 20:20:03,554 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 20:20:03,555 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 20:20:03,555 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-26 20:20:03,556 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-26 20:20:03,556 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-26 20:20:03,556 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 20:20:03,556 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 20:20:03,556 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 20:20:03,556 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 20:20:03,557 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 20:20:03,557 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 20:20:03,557 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 20:20:03,557 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 20:20:03,557 INFO L131 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2018-10-26 20:20:03,557 INFO L133 SettingsManager]: * Timeout in seconds=1000000 [2018-10-26 20:20:03,557 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 20:20:03,557 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 20:20:03,558 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2018-10-26 20:20:03,558 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 20:20:03,558 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 20:20:03,558 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 20:20:03,560 INFO L133 SettingsManager]: * Trace refinement strategy=PENGUIN [2018-10-26 20:20:03,560 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 20:20:03,560 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 20:20:03,561 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-26 20:20:03,561 INFO L133 SettingsManager]: * To the following directory=dump/ 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-vcloud-master/worker/working_dir_2d8d9e2b-508b-471b-9c7e-88ded1e22a2e/bin-2019/ukojak 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(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Kojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9b86cf05538087e5ba57515a88c875520d7bbb97 [2018-10-26 20:20:03,586 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 20:20:03,595 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 20:20:03,598 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 20:20:03,599 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 20:20:03,600 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 20:20:03,600 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_2d8d9e2b-508b-471b-9c7e-88ded1e22a2e/bin-2019/ukojak/../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_bitvector_linux-3.16-rc1.tar.xz-43_2a-net--atm--lec.ko-entry_point_false-unreach-call.cil.out.c [2018-10-26 20:20:03,647 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_2d8d9e2b-508b-471b-9c7e-88ded1e22a2e/bin-2019/ukojak/data/e95c5747e/5a04c8fd193c4ff98125e5d413d477fa/FLAGf44b0c0d3 [2018-10-26 20:20:04,448 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 20:20:04,448 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_2d8d9e2b-508b-471b-9c7e-88ded1e22a2e/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_bitvector_linux-3.16-rc1.tar.xz-43_2a-net--atm--lec.ko-entry_point_false-unreach-call.cil.out.c [2018-10-26 20:20:04,490 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_2d8d9e2b-508b-471b-9c7e-88ded1e22a2e/bin-2019/ukojak/data/e95c5747e/5a04c8fd193c4ff98125e5d413d477fa/FLAGf44b0c0d3 [2018-10-26 20:20:04,502 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_2d8d9e2b-508b-471b-9c7e-88ded1e22a2e/bin-2019/ukojak/data/e95c5747e/5a04c8fd193c4ff98125e5d413d477fa [2018-10-26 20:20:04,505 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 20:20:04,508 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-26 20:20:04,509 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 20:20:04,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 20:20:04,516 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 20:20:04,516 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:20:04" (1/1) ... [2018-10-26 20:20:04,519 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32ed6b60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:20:04, skipping insertion in model container [2018-10-26 20:20:04,520 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:20:04" (1/1) ... [2018-10-26 20:20:04,532 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 20:20:04,678 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 20:20:05,111 WARN L1126 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [6092] [2018-10-26 20:20:05,111 WARN L1126 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [6093-6094] [2018-10-26 20:20:07,103 FATAL L292 ToolchainWalker]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator has thrown an exception: java.lang.ClassCastException: de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.container.c.CPointer cannot be cast to de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.container.c.CPrimitive at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.expressiontranslation.IntegerTranslation.convertToIntegerType(IntegerTranslation.java:474) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.expressiontranslation.IntegerTranslation.convertIntToInt_NonBool(IntegerTranslation.java:466) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.expressiontranslation.ExpressionTranslation.convertIntToInt(ExpressionTranslation.java:360) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.expressiontranslation.NonBijectiveMapping.convertIntToPointer(NonBijectiveMapping.java:78) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.expressiontranslation.ExpressionTranslation.convertIntToPointer(ExpressionTranslation.java:468) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.handleConditionalOperator(CHandler.java:4054) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:999) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:276) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:2169) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:303) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.FunctionHandler.handleReturnStatement(FunctionHandler.java:519) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1776) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:193) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:960) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:232) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:960) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:232) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.FunctionHandler.handleFunctionDefinition(FunctionHandler.java:364) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1371) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:155) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.processTUchild(CHandler.java:3316) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:2119) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:537) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:134) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.translate(MainTranslator.java:188) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.run(MainTranslator.java:117) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.(MainTranslator.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver.finish(CACSL2BoogieTranslatorObserver.java:129) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2018-10-26 20:20:07,107 INFO L168 Benchmark]: Toolchain (without parser) took 2599.75 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 230.7 MB). Free memory was 944.9 MB in the beginning and 1.1 GB in the end (delta: -107.9 MB). Peak memory consumption was 297.7 MB. Max. memory is 11.5 GB. [2018-10-26 20:20:07,108 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 985.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 20:20:07,109 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2597.32 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 230.7 MB). Free memory was 944.9 MB in the beginning and 1.1 GB in the end (delta: -107.9 MB). Peak memory consumption was 297.7 MB. Max. memory is 11.5 GB. [2018-10-26 20:20:07,115 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 985.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 2597.32 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 230.7 MB). Free memory was 944.9 MB in the beginning and 1.1 GB in the end (delta: -107.9 MB). Peak memory consumption was 297.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - ExceptionOrErrorResult: ClassCastException: de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.container.c.CPointer cannot be cast to de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.container.c.CPrimitive de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: ClassCastException: de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.container.c.CPointer cannot be cast to de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.container.c.CPrimitive: de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.expressiontranslation.IntegerTranslation.convertToIntegerType(IntegerTranslation.java:474) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.23-1dbac8b [2018-10-26 20:20:08,873 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 20:20:08,874 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 20:20:08,884 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 20:20:08,884 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 20:20:08,885 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 20:20:08,886 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 20:20:08,888 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 20:20:08,889 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 20:20:08,890 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 20:20:08,891 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 20:20:08,891 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 20:20:08,892 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 20:20:08,892 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 20:20:08,893 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 20:20:08,894 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 20:20:08,895 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 20:20:08,896 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 20:20:08,898 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 20:20:08,899 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 20:20:08,900 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 20:20:08,901 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 20:20:08,903 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 20:20:08,903 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 20:20:08,904 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 20:20:08,904 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 20:20:08,905 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 20:20:08,906 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 20:20:08,907 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 20:20:08,908 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 20:20:08,908 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 20:20:08,908 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-26 20:20:08,909 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-26 20:20:08,909 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-26 20:20:08,910 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-26 20:20:08,910 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-26 20:20:08,910 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_2d8d9e2b-508b-471b-9c7e-88ded1e22a2e/bin-2019/ukojak/config/svcomp-Reach-64bit-Kojak_Bitvector.epf [2018-10-26 20:20:08,922 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 20:20:08,922 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 20:20:08,923 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 20:20:08,923 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-26 20:20:08,923 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-26 20:20:08,924 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-26 20:20:08,924 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 20:20:08,924 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 20:20:08,924 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 20:20:08,924 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 20:20:08,924 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 20:20:08,924 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-10-26 20:20:08,925 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-10-26 20:20:08,925 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 20:20:08,925 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 20:20:08,925 INFO L131 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2018-10-26 20:20:08,925 INFO L133 SettingsManager]: * Timeout in seconds=1000000 [2018-10-26 20:20:08,925 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 20:20:08,925 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 20:20:08,926 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2018-10-26 20:20:08,926 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 20:20:08,926 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 20:20:08,928 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 20:20:08,928 INFO L133 SettingsManager]: * Use separate solver for trace checks=false [2018-10-26 20:20:08,928 INFO L133 SettingsManager]: * Trace refinement strategy=WALRUS [2018-10-26 20:20:08,928 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 20:20:08,929 INFO L133 SettingsManager]: * Command for external solver=cvc4nyu --tear-down-incremental --rewrite-divk --print-success --lang smt [2018-10-26 20:20:08,929 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-10-26 20:20:08,929 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-26 20:20:08,929 INFO L133 SettingsManager]: * To the following directory=dump/ 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-vcloud-master/worker/working_dir_2d8d9e2b-508b-471b-9c7e-88ded1e22a2e/bin-2019/ukojak 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(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Kojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9b86cf05538087e5ba57515a88c875520d7bbb97 [2018-10-26 20:20:08,962 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 20:20:08,971 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 20:20:08,974 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 20:20:08,975 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 20:20:08,976 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 20:20:08,976 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_2d8d9e2b-508b-471b-9c7e-88ded1e22a2e/bin-2019/ukojak/../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_bitvector_linux-3.16-rc1.tar.xz-43_2a-net--atm--lec.ko-entry_point_false-unreach-call.cil.out.c [2018-10-26 20:20:09,019 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_2d8d9e2b-508b-471b-9c7e-88ded1e22a2e/bin-2019/ukojak/data/9816cf687/5c0cf077b23142fcba916b1264146cf1/FLAG5311f811e [2018-10-26 20:20:09,740 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 20:20:09,741 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_2d8d9e2b-508b-471b-9c7e-88ded1e22a2e/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_bitvector_linux-3.16-rc1.tar.xz-43_2a-net--atm--lec.ko-entry_point_false-unreach-call.cil.out.c [2018-10-26 20:20:09,793 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_2d8d9e2b-508b-471b-9c7e-88ded1e22a2e/bin-2019/ukojak/data/9816cf687/5c0cf077b23142fcba916b1264146cf1/FLAG5311f811e [2018-10-26 20:20:09,807 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_2d8d9e2b-508b-471b-9c7e-88ded1e22a2e/bin-2019/ukojak/data/9816cf687/5c0cf077b23142fcba916b1264146cf1 [2018-10-26 20:20:09,809 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 20:20:09,810 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-26 20:20:09,811 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 20:20:09,811 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 20:20:09,815 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 20:20:09,815 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:20:09" (1/1) ... [2018-10-26 20:20:09,818 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59a76cfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:20:09, skipping insertion in model container [2018-10-26 20:20:09,818 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:20:09" (1/1) ... [2018-10-26 20:20:09,827 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 20:20:09,973 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 20:20:10,508 WARN L1126 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [6092] [2018-10-26 20:20:10,508 WARN L1126 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [6093-6094] [2018-10-26 20:20:27,607 FATAL L292 ToolchainWalker]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator has thrown an exception: java.lang.ClassCastException: de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.container.c.CPointer cannot be cast to de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.container.c.CPrimitive at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.expressiontranslation.BitvectorTranslation.convertIntToInt_NonBool(BitvectorTranslation.java:428) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.expressiontranslation.ExpressionTranslation.convertIntToInt(ExpressionTranslation.java:360) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.expressiontranslation.NonBijectiveMapping.convertIntToPointer(NonBijectiveMapping.java:78) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.expressiontranslation.ExpressionTranslation.convertIntToPointer(ExpressionTranslation.java:468) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.handleConditionalOperator(CHandler.java:4054) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:999) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:276) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:2169) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:303) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.FunctionHandler.handleReturnStatement(FunctionHandler.java:519) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1776) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:193) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:960) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:232) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:960) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:232) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.FunctionHandler.handleFunctionDefinition(FunctionHandler.java:364) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1371) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:155) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.processTUchild(CHandler.java:3316) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:2119) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:537) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:134) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.translate(MainTranslator.java:188) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.run(MainTranslator.java:117) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.(MainTranslator.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver.finish(CACSL2BoogieTranslatorObserver.java:129) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2018-10-26 20:20:27,611 INFO L168 Benchmark]: Toolchain (without parser) took 17800.91 ms. Allocated memory was 1.0 GB in the beginning and 3.1 GB in the end (delta: 2.1 GB). Free memory was 937.0 MB in the beginning and 2.7 GB in the end (delta: -1.8 GB). Peak memory consumption was 2.3 GB. Max. memory is 11.5 GB. [2018-10-26 20:20:27,612 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 20:20:27,617 INFO L168 Benchmark]: CACSL2BoogieTranslator took 17798.92 ms. Allocated memory was 1.0 GB in the beginning and 3.1 GB in the end (delta: 2.1 GB). Free memory was 937.0 MB in the beginning and 2.7 GB in the end (delta: -1.8 GB). Peak memory consumption was 2.3 GB. Max. memory is 11.5 GB. [2018-10-26 20:20:27,619 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 17798.92 ms. Allocated memory was 1.0 GB in the beginning and 3.1 GB in the end (delta: 2.1 GB). Free memory was 937.0 MB in the beginning and 2.7 GB in the end (delta: -1.8 GB). Peak memory consumption was 2.3 GB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - ExceptionOrErrorResult: ClassCastException: de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.container.c.CPointer cannot be cast to de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.container.c.CPrimitive de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: ClassCastException: de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.container.c.CPointer cannot be cast to de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.container.c.CPrimitive: de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.expressiontranslation.BitvectorTranslation.convertIntToInt_NonBool(BitvectorTranslation.java:428) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...