java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplTransformed.xml -s ../../../trunk/examples/settings/heapseparator/heapsep-2018-09-18.epf -i ../../../trunk/examples/programs/20181010-MemSafetyPathprograms/openbsd_cstrlcpy-alloca_true-valid-memsafety_true-termination.i_18.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-093a8c0 [2018-10-14 18:34:27,334 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-14 18:34:27,337 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-14 18:34:27,349 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-14 18:34:27,349 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-14 18:34:27,350 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-14 18:34:27,352 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-14 18:34:27,353 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-14 18:34:27,355 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-14 18:34:27,356 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-14 18:34:27,357 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-14 18:34:27,357 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-14 18:34:27,358 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-14 18:34:27,359 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-14 18:34:27,360 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-14 18:34:27,361 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-14 18:34:27,362 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-14 18:34:27,364 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-14 18:34:27,366 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-14 18:34:27,368 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-14 18:34:27,369 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-14 18:34:27,370 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-14 18:34:27,373 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-14 18:34:27,373 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-14 18:34:27,373 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-14 18:34:27,374 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-14 18:34:27,375 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-14 18:34:27,376 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-14 18:34:27,377 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-14 18:34:27,378 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-14 18:34:27,378 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-14 18:34:27,379 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-14 18:34:27,379 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-14 18:34:27,379 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-14 18:34:27,380 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-14 18:34:27,381 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-14 18:34:27,381 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/heapseparator/heapsep-2018-09-18.epf [2018-10-14 18:34:27,391 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-14 18:34:27,391 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-14 18:34:27,392 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-14 18:34:27,392 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-10-14 18:34:27,393 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-10-14 18:34:27,393 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-14 18:34:27,394 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-14 18:34:27,394 INFO L133 SettingsManager]: * Size of a code block=SingleStatement [2018-10-14 18:34:27,394 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-14 18:34:27,394 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_TreeInterpolation [2018-10-14 18:34:27,394 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-14 18:34:27,395 INFO L133 SettingsManager]: * Order in Petri net unfolding=Ken McMillan [2018-10-14 18:34:27,395 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-14 18:34:27,396 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-10-14 18:34:27,396 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-10-14 18:34:27,438 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-14 18:34:27,451 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-14 18:34:27,455 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-14 18:34:27,457 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-14 18:34:27,458 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-14 18:34:27,458 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/openbsd_cstrlcpy-alloca_true-valid-memsafety_true-termination.i_18.bpl [2018-10-14 18:34:27,459 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/openbsd_cstrlcpy-alloca_true-valid-memsafety_true-termination.i_18.bpl' [2018-10-14 18:34:27,526 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-14 18:34:27,528 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-14 18:34:27,529 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-14 18:34:27,529 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-14 18:34:27,530 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-14 18:34:27,562 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "openbsd_cstrlcpy-alloca_true-valid-memsafety_true-termination.i_18.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 06:34:27" (1/1) ... [2018-10-14 18:34:27,564 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "openbsd_cstrlcpy-alloca_true-valid-memsafety_true-termination.i_18.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 06:34:27" (1/1) ... [2018-10-14 18:34:27,580 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "openbsd_cstrlcpy-alloca_true-valid-memsafety_true-termination.i_18.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 06:34:27" (1/1) ... [2018-10-14 18:34:27,581 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "openbsd_cstrlcpy-alloca_true-valid-memsafety_true-termination.i_18.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 06:34:27" (1/1) ... [2018-10-14 18:34:27,587 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "openbsd_cstrlcpy-alloca_true-valid-memsafety_true-termination.i_18.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 06:34:27" (1/1) ... [2018-10-14 18:34:27,589 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "openbsd_cstrlcpy-alloca_true-valid-memsafety_true-termination.i_18.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 06:34:27" (1/1) ... [2018-10-14 18:34:27,591 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "openbsd_cstrlcpy-alloca_true-valid-memsafety_true-termination.i_18.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 06:34:27" (1/1) ... [2018-10-14 18:34:27,594 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-14 18:34:27,597 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-14 18:34:27,597 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-14 18:34:27,597 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-14 18:34:27,598 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "openbsd_cstrlcpy-alloca_true-valid-memsafety_true-termination.i_18.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.10 06:34:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-14 18:34:27,680 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-14 18:34:27,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-14 18:34:27,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-14 18:34:28,421 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-14 18:34:28,421 INFO L202 PluginConnector]: Adding new model openbsd_cstrlcpy-alloca_true-valid-memsafety_true-termination.i_18.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:34:28 BoogieIcfgContainer [2018-10-14 18:34:28,422 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-14 18:34:28,422 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2018-10-14 18:34:28,422 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2018-10-14 18:34:28,423 INFO L276 PluginConnector]: IcfgTransformer initialized [2018-10-14 18:34:28,427 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "openbsd_cstrlcpy-alloca_true-valid-memsafety_true-termination.i_18.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:34:28" (1/1) ... [2018-10-14 18:34:28,436 INFO L137 apSepIcfgTransformer]: HeapSepIcfgTransformer: Starting heap partitioning [2018-10-14 18:34:28,436 INFO L138 apSepIcfgTransformer]: To be partitioned heap arrays found [#memory_int] [2018-10-14 18:34:28,480 INFO L191 apSepIcfgTransformer]: Heap separator: starting loc-array-style preprocessing [2018-10-14 18:34:28,537 INFO L219 apSepIcfgTransformer]: finished MemlocArrayUpdater [2018-10-14 18:34:28,554 INFO L282 apSepIcfgTransformer]: finished preprocessing for the equality analysis [2018-10-14 18:34:28,624 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=1) [2018-10-14 18:40:34,774 FATAL L292 ToolchainWalker]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation has thrown an exception: java.util.ConcurrentModificationException at java.util.HashMap$HashIterator.nextNode(HashMap.java:1442) at java.util.HashMap$KeyIterator.next(HashMap.java:1466) at java.util.Collections$UnmodifiableCollection$1.next(Collections.java:1042) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.absint.vpdomain.WeqCongruenceClosure.registerNewElement(WeqCongruenceClosure.java:1351) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.absint.vpdomain.WeqCongruenceClosure.addElementRec(WeqCongruenceClosure.java:1771) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.absint.vpdomain.WeqCongruenceClosure.addElement(WeqCongruenceClosure.java:178) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.absint.vpdomain.WeqCcManager.addNode(WeqCcManager.java:167) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.absint.vpdomain.WeqCcManager.addAllElements(WeqCcManager.java:1056) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.absint.vpdomain.WeqCcManager.alignElements(WeqCcManager.java:583) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.absint.vpdomain.WeqCcManager.isStrongerThan(WeqCcManager.java:545) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.absint.vpdomain.EqConstraint.isStrongerThan(EqConstraint.java:317) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.vp.EqState.isSubsetOf(EqState.java:220) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.vp.EqState.isSubsetOf(EqState.java:1) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.absint.DisjunctiveAbstractState.isSubsetOf(DisjunctiveAbstractState.java:205) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.checkSubset(FixpointEngine.java:561) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.isUnnecessaryPostState(FixpointEngine.java:311) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.calculateFixpoint(FixpointEngine.java:136) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.run(FixpointEngine.java:105) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.tool.AbstractInterpreter.runFuture(AbstractInterpreter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.tool.AbstractInterpreter.runFutureEqualityDomain(AbstractInterpreter.java:210) at de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation.AbsIntEqualityProvider.preprocess(AbsIntEqualityProvider.java:105) at de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation.AbsIntEqualityProvider.preprocess(AbsIntEqualityProvider.java:1) at de.uni_freiburg.informatik.ultimate.icfgtransformer.heapseparator.HeapSepIcfgTransformer.computeResult(HeapSepIcfgTransformer.java:305) at de.uni_freiburg.informatik.ultimate.icfgtransformer.heapseparator.HeapSepIcfgTransformer.(HeapSepIcfgTransformer.java:140) at de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation.IcfgTransformationObserver.applyHeapSeparator(IcfgTransformationObserver.java:226) at de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation.IcfgTransformationObserver.createTransformer(IcfgTransformationObserver.java:163) at de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation.IcfgTransformationObserver.processIcfg(IcfgTransformationObserver.java:141) at de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation.IcfgTransformationObserver.process(IcfgTransformationObserver.java:129) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.CFGWalker.runObserver(CFGWalker.java:57) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) 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) [2018-10-14 18:40:34,779 INFO L168 Benchmark]: Toolchain (without parser) took 367251.98 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 2.0 GB). Free memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: -877.7 MB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. [2018-10-14 18:40:34,782 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-14 18:40:34,782 INFO L168 Benchmark]: Boogie Preprocessor took 65.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-14 18:40:34,783 INFO L168 Benchmark]: RCFGBuilder took 824.95 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 31.7 MB). Peak memory consumption was 31.7 MB. Max. memory is 7.1 GB. [2018-10-14 18:40:34,784 INFO L168 Benchmark]: IcfgTransformer took 366356.07 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 2.0 GB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -909.4 MB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. [2018-10-14 18:40:34,792 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 65.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 824.95 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 31.7 MB). Peak memory consumption was 31.7 MB. Max. memory is 7.1 GB. * IcfgTransformer took 366356.07 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 2.0 GB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -909.4 MB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation: - ExceptionOrErrorResult: ConcurrentModificationException: null de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation: ConcurrentModificationException: null: java.util.HashMap$HashIterator.nextNode(HashMap.java:1442) RESULT: Ultimate could not prove your program: Toolchain returned no result. Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/openbsd_cstrlcpy-alloca_true-valid-memsafety_true-termination.i_18.bpl_heapsep-2018-09-18.epf_AutomizerBplTransformed.xml/Csv-Benchmark-0-2018-10-14_18-40-34-811.csv Received shutdown request...