./Ultimate.py --spec ../../sv-benchmarks/c/Systems_DeviceDriversLinux64_ReachSafety.prp --file ../../sv-benchmarks/c/ldv-linux-4.0-rc1-mav/linux-4.0-rc1---drivers--scsi--hpsa.ko_false-unreach-call.cil.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_773481dc-7ef8-40eb-95ed-6319ec607c4c/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_773481dc-7ef8-40eb-95ed-6319ec607c4c/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_773481dc-7ef8-40eb-95ed-6319ec607c4c/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_773481dc-7ef8-40eb-95ed-6319ec607c4c/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.0-rc1-mav/linux-4.0-rc1---drivers--scsi--hpsa.ko_false-unreach-call.cil.c -s /tmp/vcloud-vcloud-master/worker/working_dir_773481dc-7ef8-40eb-95ed-6319ec607c4c/bin-2019/utaipan/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_773481dc-7ef8-40eb-95ed-6319ec607c4c/bin-2019/utaipan --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 8edea17036d62ee9eae113ac1da10a18f1b84e45 ....................................................................................................................................................................... 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_773481dc-7ef8-40eb-95ed-6319ec607c4c/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_773481dc-7ef8-40eb-95ed-6319ec607c4c/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_773481dc-7ef8-40eb-95ed-6319ec607c4c/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_773481dc-7ef8-40eb-95ed-6319ec607c4c/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.0-rc1-mav/linux-4.0-rc1---drivers--scsi--hpsa.ko_false-unreach-call.cil.c -s /tmp/vcloud-vcloud-master/worker/working_dir_773481dc-7ef8-40eb-95ed-6319ec607c4c/bin-2019/utaipan/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_773481dc-7ef8-40eb-95ed-6319ec607c4c/bin-2019/utaipan --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 8edea17036d62ee9eae113ac1da10a18f1b84e45 .......................................................................................................................................................................................... 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 0.1.23-5842f4b [2018-11-18 15:40:29,560 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 15:40:29,561 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 15:40:29,570 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 15:40:29,570 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 15:40:29,571 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 15:40:29,571 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 15:40:29,572 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 15:40:29,574 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 15:40:29,574 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 15:40:29,575 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 15:40:29,575 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 15:40:29,576 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 15:40:29,576 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 15:40:29,577 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 15:40:29,577 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 15:40:29,579 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 15:40:29,580 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 15:40:29,581 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 15:40:29,583 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 15:40:29,583 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 15:40:29,584 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 15:40:29,585 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 15:40:29,585 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 15:40:29,586 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 15:40:29,586 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 15:40:29,587 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 15:40:29,587 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 15:40:29,588 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 15:40:29,589 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 15:40:29,589 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 15:40:29,589 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 15:40:29,589 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 15:40:29,590 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 15:40:29,591 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 15:40:29,592 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 15:40:29,592 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_773481dc-7ef8-40eb-95ed-6319ec607c4c/bin-2019/utaipan/config/svcomp-Reach-64bit-Taipan_Default.epf [2018-11-18 15:40:29,602 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 15:40:29,602 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 15:40:29,603 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 15:40:29,603 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 15:40:29,603 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 15:40:29,603 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 15:40:29,603 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 15:40:29,603 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-18 15:40:29,603 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 15:40:29,604 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 15:40:29,604 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-18 15:40:29,604 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-18 15:40:29,604 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-18 15:40:29,604 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 15:40:29,605 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 15:40:29,605 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 15:40:29,605 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 15:40:29,605 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 15:40:29,605 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 15:40:29,605 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 15:40:29,605 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 15:40:29,606 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 15:40:29,606 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 15:40:29,608 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 15:40:29,608 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 15:40:29,608 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 15:40:29,608 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 15:40:29,609 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 15:40:29,609 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 15:40:29,609 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 15:40:29,609 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 15:40:29,609 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-18 15:40:29,609 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 15:40:29,609 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 15:40:29,610 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-18 15:40:29,610 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-18 15:40:29,610 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_773481dc-7ef8-40eb-95ed-6319ec607c4c/bin-2019/utaipan 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 -> Taipan 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 -> 8edea17036d62ee9eae113ac1da10a18f1b84e45 [2018-11-18 15:40:29,634 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 15:40:29,643 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 15:40:29,645 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 15:40:29,647 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 15:40:29,647 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 15:40:29,647 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_773481dc-7ef8-40eb-95ed-6319ec607c4c/bin-2019/utaipan/../../sv-benchmarks/c/ldv-linux-4.0-rc1-mav/linux-4.0-rc1---drivers--scsi--hpsa.ko_false-unreach-call.cil.c [2018-11-18 15:40:29,685 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_773481dc-7ef8-40eb-95ed-6319ec607c4c/bin-2019/utaipan/data/63c90043b/544defb4bfc4462783f90f7c3a7699b8/FLAGabfb72605 [2018-11-18 15:40:30,378 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 15:40:30,378 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_773481dc-7ef8-40eb-95ed-6319ec607c4c/sv-benchmarks/c/ldv-linux-4.0-rc1-mav/linux-4.0-rc1---drivers--scsi--hpsa.ko_false-unreach-call.cil.c [2018-11-18 15:40:30,426 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_773481dc-7ef8-40eb-95ed-6319ec607c4c/bin-2019/utaipan/data/63c90043b/544defb4bfc4462783f90f7c3a7699b8/FLAGabfb72605 [2018-11-18 15:40:30,668 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_773481dc-7ef8-40eb-95ed-6319ec607c4c/bin-2019/utaipan/data/63c90043b/544defb4bfc4462783f90f7c3a7699b8 [2018-11-18 15:40:30,670 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 15:40:30,671 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 15:40:30,671 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 15:40:30,671 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 15:40:30,673 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 15:40:30,673 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 03:40:30" (1/1) ... [2018-11-18 15:40:30,675 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@776d2983 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:40:30, skipping insertion in model container [2018-11-18 15:40:30,675 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 03:40:30" (1/1) ... [2018-11-18 15:40:30,682 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 15:40:30,839 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 15:40:35,413 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:4015) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:998) 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:2129) 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:539) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1735) 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:959) 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:959) 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:371) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1324) 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:3277) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:2079) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:535) 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:190) 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$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2018-11-18 15:40:35,416 INFO L168 Benchmark]: Toolchain (without parser) took 4746.12 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 464.5 MB). Free memory was 929.6 MB in the beginning and 1.0 GB in the end (delta: -88.0 MB). Peak memory consumption was 467.2 MB. Max. memory is 11.5 GB. [2018-11-18 15:40:35,418 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 15:40:35,419 INFO L168 Benchmark]: CACSL2BoogieTranslator took 4744.67 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 464.5 MB). Free memory was 929.6 MB in the beginning and 1.0 GB in the end (delta: -88.0 MB). Peak memory consumption was 467.2 MB. Max. memory is 11.5 GB. [2018-11-18 15:40:35,421 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 4744.67 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 464.5 MB). Free memory was 929.6 MB in the beginning and 1.0 GB in the end (delta: -88.0 MB). Peak memory consumption was 467.2 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 0.1.23-5842f4b [2018-11-18 15:40:36,601 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 15:40:36,602 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 15:40:36,609 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 15:40:36,609 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 15:40:36,610 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 15:40:36,611 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 15:40:36,612 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 15:40:36,613 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 15:40:36,614 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 15:40:36,614 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 15:40:36,615 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 15:40:36,615 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 15:40:36,616 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 15:40:36,617 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 15:40:36,617 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 15:40:36,618 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 15:40:36,619 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 15:40:36,620 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 15:40:36,622 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 15:40:36,622 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 15:40:36,623 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 15:40:36,625 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 15:40:36,625 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 15:40:36,625 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 15:40:36,626 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 15:40:36,626 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 15:40:36,627 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 15:40:36,628 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 15:40:36,628 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 15:40:36,629 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 15:40:36,629 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 15:40:36,629 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 15:40:36,629 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 15:40:36,630 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 15:40:36,630 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 15:40:36,631 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_773481dc-7ef8-40eb-95ed-6319ec607c4c/bin-2019/utaipan/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2018-11-18 15:40:36,641 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 15:40:36,641 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 15:40:36,641 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 15:40:36,642 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 15:40:36,642 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 15:40:36,642 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 15:40:36,642 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 15:40:36,642 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 15:40:36,642 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 15:40:36,642 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 15:40:36,643 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 15:40:36,643 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 15:40:36,643 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 15:40:36,643 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 15:40:36,643 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 15:40:36,643 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-11-18 15:40:36,643 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-11-18 15:40:36,643 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 15:40:36,644 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 15:40:36,644 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 15:40:36,644 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 15:40:36,644 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 15:40:36,644 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 15:40:36,644 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 15:40:36,644 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 15:40:36,644 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 15:40:36,645 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 15:40:36,645 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 15:40:36,645 INFO L133 SettingsManager]: * Trace refinement strategy=WALRUS [2018-11-18 15:40:36,645 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 15:40:36,645 INFO L133 SettingsManager]: * Command for external solver=cvc4nyu --tear-down-incremental --rewrite-divk --print-success --lang smt [2018-11-18 15:40:36,645 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-11-18 15:40:36,645 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true 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_773481dc-7ef8-40eb-95ed-6319ec607c4c/bin-2019/utaipan 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 -> Taipan 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 -> 8edea17036d62ee9eae113ac1da10a18f1b84e45 [2018-11-18 15:40:36,672 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 15:40:36,681 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 15:40:36,683 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 15:40:36,683 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 15:40:36,684 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 15:40:36,684 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_773481dc-7ef8-40eb-95ed-6319ec607c4c/bin-2019/utaipan/../../sv-benchmarks/c/ldv-linux-4.0-rc1-mav/linux-4.0-rc1---drivers--scsi--hpsa.ko_false-unreach-call.cil.c [2018-11-18 15:40:36,719 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_773481dc-7ef8-40eb-95ed-6319ec607c4c/bin-2019/utaipan/data/8c7205d88/2cabc95efda74ddebe69f0afd4229e6c/FLAG0b98403e1 [2018-11-18 15:40:37,343 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 15:40:37,343 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_773481dc-7ef8-40eb-95ed-6319ec607c4c/sv-benchmarks/c/ldv-linux-4.0-rc1-mav/linux-4.0-rc1---drivers--scsi--hpsa.ko_false-unreach-call.cil.c [2018-11-18 15:40:37,394 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_773481dc-7ef8-40eb-95ed-6319ec607c4c/bin-2019/utaipan/data/8c7205d88/2cabc95efda74ddebe69f0afd4229e6c/FLAG0b98403e1 [2018-11-18 15:40:37,750 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_773481dc-7ef8-40eb-95ed-6319ec607c4c/bin-2019/utaipan/data/8c7205d88/2cabc95efda74ddebe69f0afd4229e6c [2018-11-18 15:40:37,753 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 15:40:37,754 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 15:40:37,755 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 15:40:37,755 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 15:40:37,758 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 15:40:37,758 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 03:40:37" (1/1) ... [2018-11-18 15:40:37,760 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bacd19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:40:37, skipping insertion in model container [2018-11-18 15:40:37,760 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 03:40:37" (1/1) ... [2018-11-18 15:40:37,768 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 15:40:37,944 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 15:40:43,618 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:498) 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:4015) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:998) 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:2129) 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:539) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1735) 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:959) 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:959) 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:371) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1324) 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:3277) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:2079) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:535) 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:190) 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$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2018-11-18 15:40:43,621 INFO L168 Benchmark]: Toolchain (without parser) took 5867.90 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 479.7 MB). Free memory was 920.9 MB in the beginning and 759.6 MB in the end (delta: 161.4 MB). Peak memory consumption was 646.6 MB. Max. memory is 11.5 GB. [2018-11-18 15:40:43,623 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 15:40:43,624 INFO L168 Benchmark]: CACSL2BoogieTranslator took 5865.84 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 479.7 MB). Free memory was 920.9 MB in the beginning and 759.6 MB in the end (delta: 161.4 MB). Peak memory consumption was 646.6 MB. Max. memory is 11.5 GB. [2018-11-18 15:40:43,626 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 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 5865.84 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 479.7 MB). Free memory was 920.9 MB in the beginning and 759.6 MB in the end (delta: 161.4 MB). Peak memory consumption was 646.6 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.BitvectorTranslation.convertIntToInt_NonBool(BitvectorTranslation.java:498) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...