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 --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/product-lines/minepump_spec4_product29.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-04 12:48:55,570 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-04 12:48:55,573 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-04 12:48:55,585 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-04 12:48:55,585 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-04 12:48:55,586 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-04 12:48:55,588 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-04 12:48:55,590 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-04 12:48:55,592 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-04 12:48:55,592 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-04 12:48:55,593 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-04 12:48:55,595 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-04 12:48:55,595 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-04 12:48:55,596 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-04 12:48:55,597 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-04 12:48:55,598 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-04 12:48:55,599 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-04 12:48:55,600 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-04 12:48:55,602 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-04 12:48:55,604 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-04 12:48:55,606 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-04 12:48:55,607 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-04 12:48:55,608 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-04 12:48:55,609 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-04 12:48:55,612 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-04 12:48:55,612 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-04 12:48:55,613 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-04 12:48:55,614 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-04 12:48:55,614 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-04 12:48:55,615 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-04 12:48:55,616 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-04 12:48:55,616 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-04 12:48:55,617 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-04 12:48:55,618 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-04 12:48:55,619 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-04 12:48:55,619 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-04 12:48:55,620 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-04 12:48:55,620 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-04 12:48:55,620 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-04 12:48:55,621 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-04 12:48:55,622 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-04 12:48:55,623 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 [2019-10-04 12:48:55,640 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-04 12:48:55,640 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-04 12:48:55,644 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-04 12:48:55,644 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-04 12:48:55,644 INFO L138 SettingsManager]: * Use SBE=true [2019-10-04 12:48:55,645 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-04 12:48:55,645 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-04 12:48:55,646 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-04 12:48:55,646 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-04 12:48:55,646 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-04 12:48:55,647 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-04 12:48:55,648 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-04 12:48:55,648 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-04 12:48:55,648 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-04 12:48:55,649 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-04 12:48:55,649 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-04 12:48:55,649 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-04 12:48:55,649 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-04 12:48:55,649 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-04 12:48:55,650 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-04 12:48:55,650 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-04 12:48:55,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-04 12:48:55,651 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-04 12:48:55,651 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-04 12:48:55,651 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-04 12:48:55,652 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-04 12:48:55,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-04 12:48:55,652 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-04 12:48:55,652 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-04 12:48:55,693 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-04 12:48:55,709 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-04 12:48:55,717 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-04 12:48:55,719 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-04 12:48:55,719 INFO L275 PluginConnector]: CDTParser initialized [2019-10-04 12:48:55,720 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec4_product29.cil.c [2019-10-04 12:48:55,791 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a564572d5/4ec7adc6a6224d5db88c784675153dba/FLAGf395c35ff [2019-10-04 12:48:56,339 INFO L306 CDTParser]: Found 1 translation units. [2019-10-04 12:48:56,340 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/minepump_spec4_product29.cil.c [2019-10-04 12:48:56,358 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a564572d5/4ec7adc6a6224d5db88c784675153dba/FLAGf395c35ff [2019-10-04 12:48:56,659 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a564572d5/4ec7adc6a6224d5db88c784675153dba [2019-10-04 12:48:56,672 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-04 12:48:56,674 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-04 12:48:56,675 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-04 12:48:56,675 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-04 12:48:56,679 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-04 12:48:56,680 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.10 12:48:56" (1/1) ... [2019-10-04 12:48:56,686 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4376f128 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 12:48:56, skipping insertion in model container [2019-10-04 12:48:56,686 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.10 12:48:56" (1/1) ... [2019-10-04 12:48:56,695 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-04 12:48:56,756 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-04 12:48:57,233 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-04 12:48:57,259 INFO L188 MainTranslator]: Completed pre-run [2019-10-04 12:48:57,370 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-04 12:48:57,408 INFO L192 MainTranslator]: Completed translation [2019-10-04 12:48:57,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 12:48:57 WrapperNode [2019-10-04 12:48:57,409 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-04 12:48:57,410 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-04 12:48:57,410 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-04 12:48:57,410 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-04 12:48:57,423 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 12:48:57" (1/1) ... [2019-10-04 12:48:57,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 12:48:57" (1/1) ... [2019-10-04 12:48:57,448 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 12:48:57" (1/1) ... [2019-10-04 12:48:57,448 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 12:48:57" (1/1) ... [2019-10-04 12:48:57,480 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 12:48:57" (1/1) ... [2019-10-04 12:48:57,490 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 12:48:57" (1/1) ... [2019-10-04 12:48:57,497 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 12:48:57" (1/1) ... [2019-10-04 12:48:57,514 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-04 12:48:57,514 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-04 12:48:57,514 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-04 12:48:57,515 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-04 12:48:57,518 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 12:48:57" (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 [2019-10-04 12:48:57,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-04 12:48:57,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-04 12:48:57,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-04 12:48:57,574 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2019-10-04 12:48:57,574 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2019-10-04 12:48:57,574 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2019-10-04 12:48:57,574 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2019-10-04 12:48:57,575 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2019-10-04 12:48:57,575 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2019-10-04 12:48:57,575 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2019-10-04 12:48:57,575 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-04 12:48:57,575 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-04 12:48:57,575 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-04 12:48:57,576 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-04 12:48:57,576 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-04 12:48:57,576 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-04 12:48:57,576 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-04 12:48:57,576 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-04 12:48:57,576 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-04 12:48:57,577 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-04 12:48:57,577 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-04 12:48:57,577 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-04 12:48:57,577 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-04 12:48:57,577 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2019-10-04 12:48:57,577 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__methaneQuery [2019-10-04 12:48:57,577 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2019-10-04 12:48:57,578 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__wrappee__lowWaterSensor [2019-10-04 12:48:57,578 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2019-10-04 12:48:57,578 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2019-10-04 12:48:57,578 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2019-10-04 12:48:57,578 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2019-10-04 12:48:57,578 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2019-10-04 12:48:57,579 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2019-10-04 12:48:57,579 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-04 12:48:57,579 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-04 12:48:57,579 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-04 12:48:57,579 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-04 12:48:57,579 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-04 12:48:57,580 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2019-10-04 12:48:57,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-04 12:48:57,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-04 12:48:57,580 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-04 12:48:57,580 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2019-10-04 12:48:57,580 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2019-10-04 12:48:57,581 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2019-10-04 12:48:57,581 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2019-10-04 12:48:57,581 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2019-10-04 12:48:57,581 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2019-10-04 12:48:57,581 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2019-10-04 12:48:57,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-04 12:48:57,581 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-04 12:48:57,582 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-04 12:48:57,582 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-04 12:48:57,582 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-04 12:48:57,582 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-04 12:48:57,582 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-04 12:48:57,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-04 12:48:57,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-04 12:48:57,583 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-04 12:48:57,583 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-04 12:48:57,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-04 12:48:57,583 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-04 12:48:57,583 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-04 12:48:57,584 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-04 12:48:57,584 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-04 12:48:57,584 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-04 12:48:57,584 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-04 12:48:57,584 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-04 12:48:57,584 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-04 12:48:57,584 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-04 12:48:57,585 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-04 12:48:57,585 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-04 12:48:57,585 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-04 12:48:57,585 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-04 12:48:57,585 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2019-10-04 12:48:57,585 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2019-10-04 12:48:57,586 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2019-10-04 12:48:57,586 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2019-10-04 12:48:57,586 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2019-10-04 12:48:57,586 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2019-10-04 12:48:57,586 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2019-10-04 12:48:57,586 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2019-10-04 12:48:57,586 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__methaneQuery [2019-10-04 12:48:57,587 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2019-10-04 12:48:57,587 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__wrappee__lowWaterSensor [2019-10-04 12:48:57,587 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-04 12:48:57,587 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-04 12:48:57,587 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-04 12:48:57,587 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-04 12:48:57,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-04 12:48:57,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-04 12:48:57,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-04 12:48:59,247 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-04 12:48:59,247 INFO L283 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-04 12:48:59,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:48:59 BoogieIcfgContainer [2019-10-04 12:48:59,249 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-04 12:48:59,250 INFO L113 PluginConnector]: ------------------------Sifa---------------------------- [2019-10-04 12:48:59,250 INFO L271 PluginConnector]: Initializing Sifa... [2019-10-04 12:48:59,250 INFO L275 PluginConnector]: Sifa initialized [2019-10-04 12:48:59,252 INFO L185 PluginConnector]: Executing the observer SifaObserver from plugin Sifa for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:48:59" (1/1) ... [2019-10-04 12:48:59,252 INFO L79 SifaObserver]: LogSizeWrapperFluid Intern Fluid=SizeLimitFluid ♦ Abstract Domain=CompoundDomain ♦ Fluid=SizeLimitFluid ♦ Max. Parallel Explicit Values=2 ♦ Max. Parallel Intervals=2 ♦ Loop Summarizer=FixpointLoopSummarizer ♦ CompoundDomain Intern Domains=ExplicitValueDomain;IntervalDomain ♦ Call Summarizer=TopInputCallSummarizer ♦ Xnf Conversion Technique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION ♦ SizeLimitFluid Max. Disjunctions=8 ♦ Simplification Technique=SIMPLIFY_QUICK ♦ SizeLimitFluid Max. DAG Size=-1 [2019-10-04 12:48:59,284 INFO L162 IcfgInterpreter]: Started Sifa with 1 locations of interest [2019-10-04 12:48:59,289 INFO L169 IcfgInterpreter]: Building call graph [2019-10-04 12:48:59,304 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-04 12:48:59,322 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-04 12:48:59,324 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-04 12:49:08,658 WARN L191 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 464 [2019-10-04 12:49:10,288 WARN L191 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 129 [2019-10-04 12:49:10,430 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 472 [2019-10-04 12:49:10,561 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 472 [2019-10-04 12:49:10,670 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 472 [2019-10-04 12:49:10,927 WARN L191 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-04 12:49:10,951 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 544 for LOIs [2019-10-04 12:49:11,026 INFO L199 IcfgInterpreter]: Interpreting procedure runTest with input of size 542 for LOIs [2019-10-04 12:49:11,032 INFO L199 IcfgInterpreter]: Interpreting procedure test with input of size 540 for LOIs [2019-10-04 12:49:11,281 WARN L191 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 544 [2019-10-04 12:49:11,469 WARN L191 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 544 [2019-10-04 12:49:12,041 WARN L191 SmtUtils]: Spent 475.00 ms on a formula simplification that was a NOOP. DAG size: 558 [2019-10-04 12:49:12,511 WARN L191 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 558 [2019-10-04 12:49:13,008 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 185 [2019-10-04 12:49:13,872 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 167 [2019-10-04 12:49:16,075 INFO L199 IcfgInterpreter]: Interpreting procedure cleanup with input of size 1 for LOIs [2019-10-04 12:49:16,078 INFO L199 IcfgInterpreter]: Interpreting procedure timeShift with input of size 142 for LOIs [2019-10-04 12:49:16,394 INFO L199 IcfgInterpreter]: Interpreting procedure __utac_acc__Specification4_spec__1 with input of size 131 for LOIs [2019-10-04 12:49:16,402 INFO L199 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 144 for LOIs [2019-10-04 12:49:16,464 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-04 12:49:16,464 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-04 12:49:16,466 INFO L193 IcfgInterpreter]: Reachable states at location __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 620#(and (<= |#t~string33.offset| 0) (= |#t~string61.offset| 0) (= |#t~string55.offset| 0) (= |#t~string7.offset| 0) (<= 0 |#NULL.base|) (<= 0 |#t~string63.offset|) (<= |#t~string67.offset| 0) (<= ~systemActive~0 1) (<= 0 |#t~string40.offset|) (<= ~head~0.offset 0) (= |#t~string39.offset| 0) (= |#t~string3.offset| 0) (= |#t~string32.offset| 0) (= |#t~string9.offset| 0) (<= 0 |#t~string67.offset|) (= 0 ~waterLevel~0) (= |#NULL.base| 0) (= |#t~string38.offset| 0) (<= |#t~string39.offset| 0) (<= |#t~string1.offset| 0) (<= |#t~string57.offset| 0) (<= 0 (+ ~pumpRunning~0 2147483648)) (<= 0 ~head~0.base) (<= 0 |#t~string42.offset|) (<= 0 ~methaneLevelCritical~0) (<= 0 |#t~string39.offset|) (<= 0 (+ ~waterLevel~0 2147483648)) (<= |#t~string40.offset| 0) (<= 0 |#t~string61.offset|) (<= |#t~string65.offset| 0) (<= 0 ~waterLevel~0) (= |#t~string29.offset| 0) (<= |#t~string41.offset| 0) (<= 0 |#t~string9.offset|) (= |#t~string42.offset| 0) (= |#t~string57.offset| 0) (= |#t~string67.offset| 0) (<= 0 |#t~string33.offset|) (<= 0 |#NULL.offset|) (= ~head~0.base 0) (<= ~cleanupTimeShifts~0 4) (= ~cleanupTimeShifts~0 4) (= |#t~string33.offset| 0) (<= 0 |#t~string38.offset|) (<= |#NULL.base| 0) (<= |#t~string63.offset| 0) (<= 1 ~systemActive~0) (<= 4 ~cleanupTimeShifts~0) (= |#t~string31.offset| 0) (<= |#t~string38.offset| 0) (<= 0 |#t~string3.offset|) (= |#t~string69.offset| 0) (= |#t~string40.offset| 0) (= |#NULL.offset| 0) (<= 0 |#t~string57.offset|) (<= ~head~0.base 0) (<= 0 ~head~0.offset) (<= |#t~string31.offset| 0) (not (= ~pumpRunning~0 0)) (= |#t~string28.offset| 0) (<= 0 |#t~string32.offset|) (<= ~waterLevel~0 2147483647) (<= |#t~string55.offset| 0) (= |#t~string30.offset| 0) (<= ~waterLevel~0 0) (<= 0 |#t~string59.offset|) (= |#t~string65.offset| 0) (= |#t~string1.offset| 0) (<= 0 |#t~string69.offset|) (<= 0 |#t~string1.offset|) (<= |#NULL.offset| 0) (<= |#t~string7.offset| 0) (<= |#t~string9.offset| 0) (= ~head~0.offset 0) (= |#t~string63.offset| 0) (<= ~pumpRunning~0 2147483647) (<= 0 |#t~string41.offset|) (= |#t~string5.offset| 0) (<= 0 |#t~string65.offset|) (<= 0 |#t~string7.offset|) (<= |#t~string61.offset| 0) (<= |#t~string42.offset| 0) (<= |#t~string59.offset| 0) (= ~systemActive~0 1) (<= |#t~string30.offset| 0) (<= |#t~string69.offset| 0) (<= |#t~string32.offset| 0) (<= |#t~string37.offset| 0) (= |#t~string59.offset| 0) (<= 0 |#t~string29.offset|) (<= 0 |#t~string5.offset|) (<= |#t~string3.offset| 0) (<= |#t~string5.offset| 0) (<= ~methaneLevelCritical~0 1) (<= 0 |#t~string37.offset|) (<= |#t~string28.offset| 0) (<= 0 |#t~string30.offset|) (<= 0 |#t~string31.offset|) (= |#t~string41.offset| 0) (= |#t~string37.offset| 0) (<= |#t~string29.offset| 0) (<= 0 |#t~string55.offset|) (<= 0 |#t~string28.offset|)) [2019-10-04 12:49:16,481 INFO L104 SifaObserver]: ✘ Some error locations might be reachable, see reported results. [2019-10-04 12:49:16,481 INFO L132 PluginConnector]: ------------------------ END Sifa---------------------------- [2019-10-04 12:49:16,483 INFO L168 Benchmark]: Toolchain (without parser) took 19809.30 ms. Allocated memory was 141.0 MB in the beginning and 557.8 MB in the end (delta: 416.8 MB). Free memory was 86.3 MB in the beginning and 150.3 MB in the end (delta: -64.0 MB). Peak memory consumption was 352.8 MB. Max. memory is 7.1 GB. [2019-10-04 12:49:16,484 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 141.0 MB. Free memory is still 105.5 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-10-04 12:49:16,485 INFO L168 Benchmark]: CACSL2BoogieTranslator took 734.86 ms. Allocated memory was 141.0 MB in the beginning and 199.8 MB in the end (delta: 58.7 MB). Free memory was 85.9 MB in the beginning and 163.7 MB in the end (delta: -77.9 MB). Peak memory consumption was 21.4 MB. Max. memory is 7.1 GB. [2019-10-04 12:49:16,486 INFO L168 Benchmark]: Boogie Preprocessor took 103.97 ms. Allocated memory is still 199.8 MB. Free memory was 163.7 MB in the beginning and 159.5 MB in the end (delta: 4.3 MB). Peak memory consumption was 4.3 MB. Max. memory is 7.1 GB. [2019-10-04 12:49:16,487 INFO L168 Benchmark]: RCFGBuilder took 1735.09 ms. Allocated memory was 199.8 MB in the beginning and 226.5 MB in the end (delta: 26.7 MB). Free memory was 159.5 MB in the beginning and 143.4 MB in the end (delta: 16.0 MB). Peak memory consumption was 86.5 MB. Max. memory is 7.1 GB. [2019-10-04 12:49:16,488 INFO L168 Benchmark]: Sifa took 17231.46 ms. Allocated memory was 226.5 MB in the beginning and 557.8 MB in the end (delta: 331.4 MB). Free memory was 143.4 MB in the beginning and 150.3 MB in the end (delta: -6.9 MB). Peak memory consumption was 324.5 MB. Max. memory is 7.1 GB. [2019-10-04 12:49:16,492 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 141.0 MB. Free memory is still 105.5 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 734.86 ms. Allocated memory was 141.0 MB in the beginning and 199.8 MB in the end (delta: 58.7 MB). Free memory was 85.9 MB in the beginning and 163.7 MB in the end (delta: -77.9 MB). Peak memory consumption was 21.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 103.97 ms. Allocated memory is still 199.8 MB. Free memory was 163.7 MB in the beginning and 159.5 MB in the end (delta: 4.3 MB). Peak memory consumption was 4.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1735.09 ms. Allocated memory was 199.8 MB in the beginning and 226.5 MB in the end (delta: 26.7 MB). Free memory was 159.5 MB in the beginning and 143.4 MB in the end (delta: 16.0 MB). Peak memory consumption was 86.5 MB. Max. memory is 7.1 GB. * Sifa took 17231.46 ms. Allocated memory was 226.5 MB in the beginning and 557.8 MB in the end (delta: 331.4 MB). Free memory was 143.4 MB in the beginning and 150.3 MB in the end (delta: -6.9 MB). Peak memory consumption was 324.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.sifa: - StatisticsResult: Symbolic Interpretation with Fluid Abstractions OVERALL_TIME[ms]: 17182, ICFG_INTERPRETER_ENTERED_PROCEDURES: 8, DAG_INTERPRETER_EARLY_EXIT_QUERIES: 198, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 128, TOOLS_POST_TIME[ms]: 11082, TOOLS_POST_CALL_APPLICATIONS: 58, TOOLS_POST_CALL_TIME[ms]: 171, TOOLS_POST_RETURN_APPLICATIONS: 51, TOOLS_POST_RETURN_TIME[ms]: 77, TOOLS_QUANTIFIERELIM_APPLICATIONS: 236, TOOLS_QUANTIFIERELIM_TIME[ms]: 11220, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 11006, FLUID_QUERY_TIME[ms]: 14, FLUID_QUERIES: 202, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 64, DOMAIN_JOIN_TIME[ms]: 5106, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME[ms]: 431, DOMAIN_ISSUBSETEQ_APPLICATIONS: 4, DOMAIN_ISSUBSETEQ_TIME[ms]: 16, DOMAIN_ISBOTTOM_APPLICATIONS: 34, DOMAIN_ISBOTTOM_TIME[ms]: 120, LOOP_SUMMARIZER_APPLICATIONS: 2, LOOP_SUMMARIZER_CACHE_MISSES: 2, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 3030, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 3029, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 4, CALL_SUMMARIZER_APPLICATIONS: 51, CALL_SUMMARIZER_CACHE_MISSES: 23, CALL_SUMMARIZER_OVERALL_TIME[ms]: 11704, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 11703, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 8, PATH_EXPR_TIME[ms]: 8, REGEX_TO_DAG_TIME[ms]: 5, DAG_COMPRESSION_TIME[ms]: 37, DAG_COMPRESSION_PROCESSED_NODES: 337, DAG_COMPRESSION_RETAINED_NODES: 195 - UnprovableResult [Line: 140]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: Over-approximation of reachable states at this location is 620#(and (<= |#t~string33.offset| 0) (= |#t~string61.offset| 0) (= |#t~string55.offset| 0) (= |#t~string7.offset| 0) (<= 0 |#NULL.base|) (<= 0 |#t~string63.offset|) (<= |#t~string67.offset| 0) (<= ~systemActive~0 1) (<= 0 |#t~string40.offset|) (<= ~head~0.offset 0) (= |#t~string39.offset| 0) (= |#t~string3.offset| 0) (= |#t~string32.offset| 0) (= |#t~string9.offset| 0) (<= 0 |#t~string67.offset|) (= 0 ~waterLevel~0) (= |#NULL.base| 0) (= |#t~string38.offset| 0) (<= |#t~string39.offset| 0) (<= |#t~string1.offset| 0) (<= |#t~string57.offset| 0) (<= 0 (+ ~pumpRunning~0 2147483648)) (<= 0 ~head~0.base) (<= 0 |#t~string42.offset|) (<= 0 ~methaneLevelCritical~0) (<= 0 |#t~string39.offset|) (<= 0 (+ ~waterLevel~0 2147483648)) (<= |#t~string40.offset| 0) (<= 0 |#t~string61.offset|) (<= |#t~string65.offset| 0) (<= 0 ~waterLevel~0) (= |#t~string29.offset| 0) (<= |#t~string41.offset| 0) (<= 0 |#t~string9.offset|) (= |#t~string42.offset| 0) (= |#t~string57.offset| 0) (= |#t~string67.offset| 0) (<= 0 |#t~string33.offset|) (<= 0 |#NULL.offset|) (= ~head~0.base 0) (<= ~cleanupTimeShifts~0 4) (= ~cleanupTimeShifts~0 4) (= |#t~string33.offset| 0) (<= 0 |#t~string38.offset|) (<= |#NULL.base| 0) (<= |#t~string63.offset| 0) (<= 1 ~systemActive~0) (<= 4 ~cleanupTimeShifts~0) (= |#t~string31.offset| 0) (<= |#t~string38.offset| 0) (<= 0 |#t~string3.offset|) (= |#t~string69.offset| 0) (= |#t~string40.offset| 0) (= |#NULL.offset| 0) (<= 0 |#t~string57.offset|) (<= ~head~0.base 0) (<= 0 ~head~0.offset) (<= |#t~string31.offset| 0) (not (= ~pumpRunning~0 0)) (= |#t~string28.offset| 0) (<= 0 |#t~string32.offset|) (<= ~waterLevel~0 2147483647) (<= |#t~string55.offset| 0) (= |#t~string30.offset| 0) (<= ~waterLevel~0 0) (<= 0 |#t~string59.offset|) (= |#t~string65.offset| 0) (= |#t~string1.offset| 0) (<= 0 |#t~string69.offset|) (<= 0 |#t~string1.offset|) (<= |#NULL.offset| 0) (<= |#t~string7.offset| 0) (<= |#t~string9.offset| 0) (= ~head~0.offset 0) (= |#t~string63.offset| 0) (<= ~pumpRunning~0 2147483647) (<= 0 |#t~string41.offset|) (= |#t~string5.offset| 0) (<= 0 |#t~string65.offset|) (<= 0 |#t~string7.offset|) (<= |#t~string61.offset| 0) (<= |#t~string42.offset| 0) (<= |#t~string59.offset| 0) (= ~systemActive~0 1) (<= |#t~string30.offset| 0) (<= |#t~string69.offset| 0) (<= |#t~string32.offset| 0) (<= |#t~string37.offset| 0) (= |#t~string59.offset| 0) (<= 0 |#t~string29.offset|) (<= 0 |#t~string5.offset|) (<= |#t~string3.offset| 0) (<= |#t~string5.offset| 0) (<= ~methaneLevelCritical~0 1) (<= 0 |#t~string37.offset|) (<= |#t~string28.offset| 0) (<= 0 |#t~string30.offset|) (<= 0 |#t~string31.offset|) (= |#t~string41.offset| 0) (= |#t~string37.offset| 0) (<= |#t~string29.offset| 0) (<= 0 |#t~string55.offset|) (<= 0 |#t~string28.offset|)). Possible FailurePath: RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...