java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/SifaC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem04_label27.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-2989841 [2019-08-09 16:54:21,677 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-08-09 16:54:21,680 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-08-09 16:54:21,692 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-08-09 16:54:21,692 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-08-09 16:54:21,693 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-08-09 16:54:21,695 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-08-09 16:54:21,697 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-08-09 16:54:21,699 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-08-09 16:54:21,700 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-08-09 16:54:21,702 INFO L181 SettingsManager]: Resetting Symbolic Interpretation preferences to default values [2019-08-09 16:54:21,712 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-08-09 16:54:21,713 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-08-09 16:54:21,714 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-08-09 16:54:21,715 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-08-09 16:54:21,718 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-08-09 16:54:21,719 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-08-09 16:54:21,720 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-08-09 16:54:21,723 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-08-09 16:54:21,725 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-08-09 16:54:21,727 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-08-09 16:54:21,728 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-08-09 16:54:21,729 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-08-09 16:54:21,729 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-08-09 16:54:21,732 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-08-09 16:54:21,733 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-08-09 16:54:21,733 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-08-09 16:54:21,734 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-08-09 16:54:21,734 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-08-09 16:54:21,735 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-08-09 16:54:21,736 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-08-09 16:54:21,737 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-08-09 16:54:21,738 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-08-09 16:54:21,739 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-08-09 16:54:21,742 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-08-09 16:54:21,742 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-08-09 16:54:21,744 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-08-09 16:54:21,745 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-08-09 16:54:21,745 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-08-09 16:54:21,747 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-08-09 16:54:21,748 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-08-09 16:54:21,750 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-08-09 16:54:21,779 INFO L113 SettingsManager]: Loading preferences was successful [2019-08-09 16:54:21,779 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-08-09 16:54:21,782 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-08-09 16:54:21,782 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-08-09 16:54:21,782 INFO L138 SettingsManager]: * Use SBE=true [2019-08-09 16:54:21,783 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-08-09 16:54:21,783 INFO L138 SettingsManager]: * sizeof long=4 [2019-08-09 16:54:21,783 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-08-09 16:54:21,783 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-08-09 16:54:21,783 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-08-09 16:54:21,784 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-08-09 16:54:21,785 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-08-09 16:54:21,785 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-08-09 16:54:21,785 INFO L138 SettingsManager]: * sizeof long double=12 [2019-08-09 16:54:21,786 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-08-09 16:54:21,786 INFO L138 SettingsManager]: * Use constant arrays=true [2019-08-09 16:54:21,786 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-08-09 16:54:21,786 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-08-09 16:54:21,786 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-08-09 16:54:21,787 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-08-09 16:54:21,787 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-08-09 16:54:21,787 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-08-09 16:54:21,787 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-08-09 16:54:21,788 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-08-09 16:54:21,788 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-08-09 16:54:21,788 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-08-09 16:54:21,788 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-08-09 16:54:21,788 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-08-09 16:54:21,789 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-08-09 16:54:21,849 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-08-09 16:54:21,861 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-08-09 16:54:21,865 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-08-09 16:54:21,866 INFO L271 PluginConnector]: Initializing CDTParser... [2019-08-09 16:54:21,867 INFO L275 PluginConnector]: CDTParser initialized [2019-08-09 16:54:21,867 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label27.c [2019-08-09 16:54:21,930 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71c9f1154/cb5f237fff9841a9a2c09042e20bce31/FLAGe010025fe [2019-08-09 16:54:22,709 INFO L306 CDTParser]: Found 1 translation units. [2019-08-09 16:54:22,710 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem04_label27.c [2019-08-09 16:54:22,736 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71c9f1154/cb5f237fff9841a9a2c09042e20bce31/FLAGe010025fe [2019-08-09 16:54:22,798 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71c9f1154/cb5f237fff9841a9a2c09042e20bce31 [2019-08-09 16:54:22,811 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-08-09 16:54:22,813 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-08-09 16:54:22,816 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-08-09 16:54:22,816 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-08-09 16:54:22,820 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-08-09 16:54:22,822 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.08 04:54:22" (1/1) ... [2019-08-09 16:54:22,825 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a93b692 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.08 04:54:22, skipping insertion in model container [2019-08-09 16:54:22,825 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.08 04:54:22" (1/1) ... [2019-08-09 16:54:22,834 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-08-09 16:54:23,008 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-08-09 16:54:24,510 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-08-09 16:54:24,517 INFO L188 MainTranslator]: Completed pre-run [2019-08-09 16:54:25,216 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-08-09 16:54:25,253 INFO L192 MainTranslator]: Completed translation [2019-08-09 16:54:25,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.08 04:54:25 WrapperNode [2019-08-09 16:54:25,254 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-08-09 16:54:25,255 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-08-09 16:54:25,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-08-09 16:54:25,256 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-08-09 16:54:25,269 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.08 04:54:25" (1/1) ... [2019-08-09 16:54:25,270 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.08 04:54:25" (1/1) ... [2019-08-09 16:54:25,334 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.08 04:54:25" (1/1) ... [2019-08-09 16:54:25,337 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.08 04:54:25" (1/1) ... [2019-08-09 16:54:25,432 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.08 04:54:25" (1/1) ... [2019-08-09 16:54:25,466 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.08 04:54:25" (1/1) ... [2019-08-09 16:54:25,486 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.08 04:54:25" (1/1) ... [2019-08-09 16:54:25,510 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-08-09 16:54:25,510 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-08-09 16:54:25,510 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-08-09 16:54:25,511 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-08-09 16:54:25,512 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.08 04:54:25" (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:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-08-09 16:54:25,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-08-09 16:54:25,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-08-09 16:54:25,568 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-08-09 16:54:25,568 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-08-09 16:54:25,568 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-08-09 16:54:25,568 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-08-09 16:54:25,569 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-08-09 16:54:25,569 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-08-09 16:54:25,571 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-08-09 16:54:25,572 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-08-09 16:54:25,572 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-08-09 16:54:25,572 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-08-09 16:54:25,573 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-08-09 16:54:25,573 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-08-09 16:54:25,574 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-08-09 16:54:25,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-08-09 16:54:25,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-08-09 16:54:30,182 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-08-09 16:54:30,182 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-08-09 16:54:30,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.08 04:54:30 BoogieIcfgContainer [2019-08-09 16:54:30,186 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-08-09 16:54:30,187 INFO L113 PluginConnector]: ------------------------Symbolic Interpretation---------------------------- [2019-08-09 16:54:30,187 INFO L271 PluginConnector]: Initializing Symbolic Interpretation... [2019-08-09 16:54:30,187 INFO L275 PluginConnector]: Symbolic Interpretation initialized [2019-08-09 16:54:30,188 INFO L185 PluginConnector]: Executing the observer SymbolicInterpretationObserver from plugin Symbolic Interpretation for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.08 04:54:30" (1/1) ... [2019-08-09 16:54:35,075 WARN L88 terpretationObserver]: Some locations of interest might be reachable, see reported results. [2019-08-09 16:54:35,083 INFO L132 PluginConnector]: ------------------------ END Symbolic Interpretation---------------------------- [2019-08-09 16:54:35,088 INFO L168 Benchmark]: Toolchain (without parser) took 12271.80 ms. Allocated memory was 133.2 MB in the beginning and 538.4 MB in the end (delta: 405.3 MB). Free memory was 72.6 MB in the beginning and 89.6 MB in the end (delta: -17.0 MB). Peak memory consumption was 428.1 MB. Max. memory is 7.1 GB. [2019-08-09 16:54:35,089 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 133.2 MB. Free memory was 106.0 MB in the beginning and 105.8 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-08-09 16:54:35,090 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2439.00 ms. Allocated memory was 133.2 MB in the beginning and 269.5 MB in the end (delta: 136.3 MB). Free memory was 72.4 MB in the beginning and 194.6 MB in the end (delta: -122.2 MB). Peak memory consumption was 110.4 MB. Max. memory is 7.1 GB. [2019-08-09 16:54:35,091 INFO L168 Benchmark]: Boogie Preprocessor took 254.71 ms. Allocated memory is still 269.5 MB. Free memory was 194.6 MB in the beginning and 165.0 MB in the end (delta: 29.6 MB). Peak memory consumption was 29.6 MB. Max. memory is 7.1 GB. [2019-08-09 16:54:35,092 INFO L168 Benchmark]: RCFGBuilder took 4676.05 ms. Allocated memory was 269.5 MB in the beginning and 445.1 MB in the end (delta: 175.6 MB). Free memory was 165.0 MB in the beginning and 353.4 MB in the end (delta: -188.4 MB). Peak memory consumption was 219.6 MB. Max. memory is 7.1 GB. [2019-08-09 16:54:35,093 INFO L168 Benchmark]: Symbolic Interpretation took 4896.28 ms. Allocated memory was 445.1 MB in the beginning and 538.4 MB in the end (delta: 93.3 MB). Free memory was 353.4 MB in the beginning and 89.6 MB in the end (delta: 263.8 MB). Peak memory consumption was 396.9 MB. Max. memory is 7.1 GB. [2019-08-09 16:54:35,098 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.symbolicinterpretation: - UnprovableResult [Line: 4697]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: Interpreter reached this location of interest. Location might be reachable. Predicate is 66053#(and (= 1 ~a1~0) (= ~a14~0 19) (= ~a28~0 16) (= 1 ~a3~0) (= ~a26~0 18) (not (= 1 ~a7~0)) (= ~a25~0 1) (= 16 ~a4~0)). Possible FailurePath: * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 133.2 MB. Free memory was 106.0 MB in the beginning and 105.8 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 2439.00 ms. Allocated memory was 133.2 MB in the beginning and 269.5 MB in the end (delta: 136.3 MB). Free memory was 72.4 MB in the beginning and 194.6 MB in the end (delta: -122.2 MB). Peak memory consumption was 110.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 254.71 ms. Allocated memory is still 269.5 MB. Free memory was 194.6 MB in the beginning and 165.0 MB in the end (delta: 29.6 MB). Peak memory consumption was 29.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 4676.05 ms. Allocated memory was 269.5 MB in the beginning and 445.1 MB in the end (delta: 175.6 MB). Free memory was 165.0 MB in the beginning and 353.4 MB in the end (delta: -188.4 MB). Peak memory consumption was 219.6 MB. Max. memory is 7.1 GB. * Symbolic Interpretation took 4896.28 ms. Allocated memory was 445.1 MB in the beginning and 538.4 MB in the end (delta: 93.3 MB). Free memory was 353.4 MB in the beginning and 89.6 MB in the end (delta: 263.8 MB). Peak memory consumption was 396.9 MB. Max. memory is 7.1 GB. RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...