java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec4_product05.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 13:30:38,749 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 13:30:38,751 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 13:30:38,763 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-20 13:30:38,763 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-20 13:30:38,764 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-20 13:30:38,766 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-20 13:30:38,767 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-20 13:30:38,769 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-20 13:30:38,770 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-20 13:30:38,771 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-20 13:30:38,772 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-20 13:30:38,772 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 13:30:38,773 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 13:30:38,774 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 13:30:38,775 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 13:30:38,776 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 13:30:38,777 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 13:30:38,779 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 13:30:38,781 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 13:30:38,782 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 13:30:38,784 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 13:30:38,785 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 13:30:38,786 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 13:30:38,788 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-20 13:30:38,788 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-20 13:30:38,789 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-20 13:30:38,790 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-20 13:30:38,790 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-20 13:30:38,791 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-20 13:30:38,792 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-20 13:30:38,794 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-20 13:30:38,795 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-20 13:30:38,796 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-20 13:30:38,799 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-20 13:30:38,799 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-20 13:30:38,800 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-20 13:30:38,800 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-20 13:30:38,800 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-20 13:30:38,801 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-20 13:30:38,802 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-20 13:30:38,803 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-20 13:30:38,818 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 13:30:38,818 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 13:30:38,818 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-20 13:30:38,819 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-20 13:30:38,819 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-20 13:30:38,820 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-20 13:30:38,820 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-20 13:30:38,820 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-20 13:30:38,820 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-20 13:30:38,820 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-20 13:30:38,821 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 13:30:38,821 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 13:30:38,822 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 13:30:38,822 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 13:30:38,822 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 13:30:38,822 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 13:30:38,822 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 13:30:38,822 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 13:30:38,823 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 13:30:38,823 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 13:30:38,823 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 13:30:38,823 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-20 13:30:38,824 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 13:30:38,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 13:30:38,824 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 13:30:38,824 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 13:30:38,824 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-20 13:30:38,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 13:30:38,825 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 13:30:38,825 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-20 13:30:38,875 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 13:30:38,886 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 13:30:38,889 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 13:30:38,891 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 13:30:38,891 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 13:30:38,892 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec4_product05.cil.c [2019-09-20 13:30:38,953 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0b6f33ce/363edd8f1b0449159b64add31bc129a8/FLAG1101925ca [2019-09-20 13:30:39,499 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 13:30:39,500 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/minepump_spec4_product05.cil.c [2019-09-20 13:30:39,514 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0b6f33ce/363edd8f1b0449159b64add31bc129a8/FLAG1101925ca [2019-09-20 13:30:39,798 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0b6f33ce/363edd8f1b0449159b64add31bc129a8 [2019-09-20 13:30:39,808 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 13:30:39,810 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 13:30:39,811 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 13:30:39,811 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 13:30:39,815 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 13:30:39,816 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:30:39" (1/1) ... [2019-09-20 13:30:39,819 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@337b8df9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:30:39, skipping insertion in model container [2019-09-20 13:30:39,819 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:30:39" (1/1) ... [2019-09-20 13:30:39,827 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 13:30:39,890 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 13:30:40,320 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:30:40,335 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 13:30:40,475 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:30:40,521 INFO L192 MainTranslator]: Completed translation [2019-09-20 13:30:40,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:30:40 WrapperNode [2019-09-20 13:30:40,521 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 13:30:40,522 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 13:30:40,522 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 13:30:40,522 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 13:30:40,532 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:30:40" (1/1) ... [2019-09-20 13:30:40,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:30:40" (1/1) ... [2019-09-20 13:30:40,550 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:30:40" (1/1) ... [2019-09-20 13:30:40,551 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:30:40" (1/1) ... [2019-09-20 13:30:40,583 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:30:40" (1/1) ... [2019-09-20 13:30:40,593 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:30:40" (1/1) ... [2019-09-20 13:30:40,598 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:30:40" (1/1) ... [2019-09-20 13:30:40,612 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 13:30:40,612 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 13:30:40,613 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 13:30:40,613 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 13:30:40,614 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:30:40" (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 [2019-09-20 13:30:40,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 13:30:40,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 13:30:40,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-09-20 13:30:40,694 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2019-09-20 13:30:40,694 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2019-09-20 13:30:40,695 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2019-09-20 13:30:40,695 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2019-09-20 13:30:40,695 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2019-09-20 13:30:40,696 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2019-09-20 13:30:40,696 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-09-20 13:30:40,697 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-09-20 13:30:40,697 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-09-20 13:30:40,697 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-09-20 13:30:40,698 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-09-20 13:30:40,698 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-09-20 13:30:40,699 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-09-20 13:30:40,699 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-09-20 13:30:40,700 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-09-20 13:30:40,700 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-09-20 13:30:40,700 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 13:30:40,700 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-09-20 13:30:40,700 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-09-20 13:30:40,700 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2019-09-20 13:30:40,701 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2019-09-20 13:30:40,701 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2019-09-20 13:30:40,702 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2019-09-20 13:30:40,702 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2019-09-20 13:30:40,702 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2019-09-20 13:30:40,702 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2019-09-20 13:30:40,702 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification4_spec__1 [2019-09-20 13:30:40,703 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-09-20 13:30:40,703 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-09-20 13:30:40,703 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-09-20 13:30:40,703 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-09-20 13:30:40,703 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-09-20 13:30:40,703 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 13:30:40,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-20 13:30:40,704 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-09-20 13:30:40,704 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2019-09-20 13:30:40,704 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2019-09-20 13:30:40,704 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2019-09-20 13:30:40,704 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2019-09-20 13:30:40,704 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2019-09-20 13:30:40,705 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2019-09-20 13:30:40,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-20 13:30:40,705 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-09-20 13:30:40,706 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-09-20 13:30:40,706 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-09-20 13:30:40,706 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-09-20 13:30:40,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-09-20 13:30:40,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-09-20 13:30:40,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-20 13:30:40,706 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-09-20 13:30:40,707 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-09-20 13:30:40,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-20 13:30:40,707 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-09-20 13:30:40,707 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-09-20 13:30:40,707 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-20 13:30:40,707 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-09-20 13:30:40,707 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-09-20 13:30:40,708 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-09-20 13:30:40,708 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-09-20 13:30:40,708 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-09-20 13:30:40,708 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2019-09-20 13:30:40,709 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-09-20 13:30:40,709 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-09-20 13:30:40,709 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-09-20 13:30:40,709 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-09-20 13:30:40,709 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-09-20 13:30:40,710 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-09-20 13:30:40,710 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-09-20 13:30:40,710 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 13:30:40,710 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2019-09-20 13:30:40,711 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2019-09-20 13:30:40,711 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2019-09-20 13:30:40,711 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification4_spec__1 [2019-09-20 13:30:40,711 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2019-09-20 13:30:40,711 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2019-09-20 13:30:40,712 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2019-09-20 13:30:40,712 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-09-20 13:30:40,712 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-09-20 13:30:40,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 13:30:40,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-09-20 13:30:40,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 13:30:41,749 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 13:30:41,750 INFO L283 CfgBuilder]: Removed 5 assume(true) statements. [2019-09-20 13:30:41,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:30:41 BoogieIcfgContainer [2019-09-20 13:30:41,751 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 13:30:41,752 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 13:30:41,752 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 13:30:41,755 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 13:30:41,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:30:39" (1/3) ... [2019-09-20 13:30:41,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c41d725 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:30:41, skipping insertion in model container [2019-09-20 13:30:41,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:30:40" (2/3) ... [2019-09-20 13:30:41,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c41d725 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:30:41, skipping insertion in model container [2019-09-20 13:30:41,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:30:41" (3/3) ... [2019-09-20 13:30:41,759 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product05.cil.c [2019-09-20 13:30:41,768 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 13:30:41,777 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 13:30:41,793 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 13:30:41,819 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 13:30:41,820 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-20 13:30:41,820 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 13:30:41,820 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 13:30:41,820 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 13:30:41,821 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 13:30:41,821 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 13:30:41,821 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 13:30:41,841 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states. [2019-09-20 13:30:41,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-09-20 13:30:41,856 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:30:41,857 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:30:41,864 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:30:41,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:30:41,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1732377001, now seen corresponding path program 1 times [2019-09-20 13:30:41,871 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:30:41,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:30:41,937 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:30:41,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:30:41,938 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:30:42,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:30:42,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:30:42,220 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:30:42,222 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-20 13:30:42,223 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:30:42,229 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-20 13:30:42,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-20 13:30:42,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:30:42,247 INFO L87 Difference]: Start difference. First operand 145 states. Second operand 2 states. [2019-09-20 13:30:42,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:30:42,275 INFO L93 Difference]: Finished difference Result 113 states and 130 transitions. [2019-09-20 13:30:42,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-20 13:30:42,277 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 46 [2019-09-20 13:30:42,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:30:42,288 INFO L225 Difference]: With dead ends: 113 [2019-09-20 13:30:42,289 INFO L226 Difference]: Without dead ends: 102 [2019-09-20 13:30:42,291 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:30:42,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-09-20 13:30:42,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2019-09-20 13:30:42,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-09-20 13:30:42,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 118 transitions. [2019-09-20 13:30:42,341 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 118 transitions. Word has length 46 [2019-09-20 13:30:42,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:30:42,342 INFO L475 AbstractCegarLoop]: Abstraction has 102 states and 118 transitions. [2019-09-20 13:30:42,342 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-20 13:30:42,342 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 118 transitions. [2019-09-20 13:30:42,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-09-20 13:30:42,346 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:30:42,346 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:30:42,346 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:30:42,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:30:42,347 INFO L82 PathProgramCache]: Analyzing trace with hash -649161626, now seen corresponding path program 1 times [2019-09-20 13:30:42,347 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:30:42,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:30:42,350 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:30:42,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:30:42,350 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:30:42,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:30:42,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:30:42,478 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:30:42,478 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-20 13:30:42,478 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:30:42,481 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-20 13:30:42,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-20 13:30:42,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:30:42,483 INFO L87 Difference]: Start difference. First operand 102 states and 118 transitions. Second operand 3 states. [2019-09-20 13:30:42,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:30:42,506 INFO L93 Difference]: Finished difference Result 93 states and 106 transitions. [2019-09-20 13:30:42,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-20 13:30:42,508 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 47 [2019-09-20 13:30:42,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:30:42,512 INFO L225 Difference]: With dead ends: 93 [2019-09-20 13:30:42,513 INFO L226 Difference]: Without dead ends: 93 [2019-09-20 13:30:42,513 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:30:42,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-09-20 13:30:42,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2019-09-20 13:30:42,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-09-20 13:30:42,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 106 transitions. [2019-09-20 13:30:42,538 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 106 transitions. Word has length 47 [2019-09-20 13:30:42,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:30:42,541 INFO L475 AbstractCegarLoop]: Abstraction has 93 states and 106 transitions. [2019-09-20 13:30:42,541 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-20 13:30:42,541 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 106 transitions. [2019-09-20 13:30:42,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-09-20 13:30:42,543 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:30:42,544 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:30:42,544 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:30:42,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:30:42,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1083619530, now seen corresponding path program 1 times [2019-09-20 13:30:42,546 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:30:42,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:30:42,549 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:30:42,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:30:42,549 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:30:42,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:30:42,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:30:42,702 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:30:42,702 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-09-20 13:30:42,702 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:30:42,703 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-20 13:30:42,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-20 13:30:42,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-09-20 13:30:42,703 INFO L87 Difference]: Start difference. First operand 93 states and 106 transitions. Second operand 7 states. [2019-09-20 13:30:42,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:30:42,992 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2019-09-20 13:30:42,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-20 13:30:42,992 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 51 [2019-09-20 13:30:42,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:30:42,994 INFO L225 Difference]: With dead ends: 93 [2019-09-20 13:30:42,994 INFO L226 Difference]: Without dead ends: 93 [2019-09-20 13:30:42,995 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-09-20 13:30:42,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-09-20 13:30:43,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2019-09-20 13:30:43,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-09-20 13:30:43,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 105 transitions. [2019-09-20 13:30:43,003 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 105 transitions. Word has length 51 [2019-09-20 13:30:43,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:30:43,004 INFO L475 AbstractCegarLoop]: Abstraction has 93 states and 105 transitions. [2019-09-20 13:30:43,004 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-20 13:30:43,004 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 105 transitions. [2019-09-20 13:30:43,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-09-20 13:30:43,006 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:30:43,006 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:30:43,006 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:30:43,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:30:43,007 INFO L82 PathProgramCache]: Analyzing trace with hash 285215055, now seen corresponding path program 1 times [2019-09-20 13:30:43,007 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:30:43,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:30:43,011 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:30:43,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:30:43,011 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:30:43,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:30:43,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:30:43,243 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:30:43,244 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-09-20 13:30:43,244 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:30:43,244 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-20 13:30:43,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-20 13:30:43,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-09-20 13:30:43,245 INFO L87 Difference]: Start difference. First operand 93 states and 105 transitions. Second operand 10 states. [2019-09-20 13:30:43,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:30:43,850 INFO L93 Difference]: Finished difference Result 211 states and 250 transitions. [2019-09-20 13:30:43,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-20 13:30:43,851 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2019-09-20 13:30:43,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:30:43,857 INFO L225 Difference]: With dead ends: 211 [2019-09-20 13:30:43,857 INFO L226 Difference]: Without dead ends: 211 [2019-09-20 13:30:43,858 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2019-09-20 13:30:43,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2019-09-20 13:30:43,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 207. [2019-09-20 13:30:43,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2019-09-20 13:30:43,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 243 transitions. [2019-09-20 13:30:43,907 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 243 transitions. Word has length 59 [2019-09-20 13:30:43,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:30:43,910 INFO L475 AbstractCegarLoop]: Abstraction has 207 states and 243 transitions. [2019-09-20 13:30:43,910 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-20 13:30:43,911 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 243 transitions. [2019-09-20 13:30:43,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-09-20 13:30:43,914 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:30:43,914 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:30:43,914 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:30:43,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:30:43,915 INFO L82 PathProgramCache]: Analyzing trace with hash 92933499, now seen corresponding path program 1 times [2019-09-20 13:30:43,915 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:30:43,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:30:43,918 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:30:43,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:30:43,918 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:30:43,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:30:43,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:30:43,992 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:30:43,993 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-20 13:30:43,993 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:30:43,993 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-20 13:30:43,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-20 13:30:43,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:30:44,000 INFO L87 Difference]: Start difference. First operand 207 states and 243 transitions. Second operand 3 states. [2019-09-20 13:30:44,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:30:44,012 INFO L93 Difference]: Finished difference Result 149 states and 167 transitions. [2019-09-20 13:30:44,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-20 13:30:44,012 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2019-09-20 13:30:44,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:30:44,014 INFO L225 Difference]: With dead ends: 149 [2019-09-20 13:30:44,014 INFO L226 Difference]: Without dead ends: 149 [2019-09-20 13:30:44,015 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:30:44,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-09-20 13:30:44,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2019-09-20 13:30:44,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-09-20 13:30:44,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 167 transitions. [2019-09-20 13:30:44,039 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 167 transitions. Word has length 67 [2019-09-20 13:30:44,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:30:44,039 INFO L475 AbstractCegarLoop]: Abstraction has 149 states and 167 transitions. [2019-09-20 13:30:44,039 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-20 13:30:44,040 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 167 transitions. [2019-09-20 13:30:44,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-09-20 13:30:44,046 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:30:44,047 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:30:44,047 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:30:44,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:30:44,049 INFO L82 PathProgramCache]: Analyzing trace with hash -670473657, now seen corresponding path program 1 times [2019-09-20 13:30:44,049 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:30:44,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:30:44,052 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:30:44,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:30:44,053 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:30:44,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:30:44,222 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-09-20 13:30:44,222 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:30:44,223 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-20 13:30:44,224 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 99 with the following transitions: [2019-09-20 13:30:44,226 INFO L207 CegarAbsIntRunner]: [50], [51], [52], [54], [57], [59], [62], [68], [70], [71], [75], [78], [102], [118], [133], [136], [137], [138], [147], [151], [155], [158], [163], [169], [171], [174], [200], [201], [209], [213], [219], [255], [259], [260], [263], [264], [265], [358], [359], [369], [377], [378], [379], [380], [381], [383], [384], [385], [386], [387], [388], [389], [390], [391], [429], [430], [431], [432], [435], [436], [441], [442], [443], [444], [451], [459], [460], [461] [2019-09-20 13:30:44,271 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-20 13:30:44,271 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-20 13:30:44,338 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-20 13:30:44,340 INFO L272 AbstractInterpreter]: Visited 2 different actions 2 times. Never merged. Never widened. Performed 68 root evaluator evaluations with a maximum evaluation depth of 0. Performed 68 inverse root evaluator evaluations with a maximum inverse evaluation depth of 0. Never found a fixpoint. Largest state had 126 variables. [2019-09-20 13:30:44,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:30:44,345 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-20 13:30:44,392 INFO L219 lantSequenceWeakener]: Could never weaken! [2019-09-20 13:30:44,393 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-20 13:30:44,397 INFO L420 sIntCurrentIteration]: We unified 97 AI predicates to 97 [2019-09-20 13:30:44,397 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-20 13:30:44,398 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-20 13:30:44,398 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 7 [2019-09-20 13:30:44,399 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:30:44,399 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-20 13:30:44,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-20 13:30:44,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:30:44,400 INFO L87 Difference]: Start difference. First operand 149 states and 167 transitions. Second operand 2 states. [2019-09-20 13:30:44,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:30:44,401 INFO L93 Difference]: Finished difference Result 2 states and 1 transitions. [2019-09-20 13:30:44,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-20 13:30:44,401 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 98 [2019-09-20 13:30:44,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:30:44,401 INFO L225 Difference]: With dead ends: 2 [2019-09-20 13:30:44,401 INFO L226 Difference]: Without dead ends: 0 [2019-09-20 13:30:44,402 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:30:44,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-20 13:30:44,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-20 13:30:44,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-20 13:30:44,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-20 13:30:44,406 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 98 [2019-09-20 13:30:44,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:30:44,406 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-20 13:30:44,406 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-20 13:30:44,407 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-20 13:30:44,407 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-20 13:30:44,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 01:30:44 BoogieIcfgContainer [2019-09-20 13:30:44,415 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-20 13:30:44,419 INFO L168 Benchmark]: Toolchain (without parser) took 4606.92 ms. Allocated memory was 133.2 MB in the beginning and 261.6 MB in the end (delta: 128.5 MB). Free memory was 87.7 MB in the beginning and 111.1 MB in the end (delta: -23.3 MB). Peak memory consumption was 105.1 MB. Max. memory is 7.1 GB. [2019-09-20 13:30:44,420 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 133.2 MB. Free memory was 107.4 MB in the beginning and 107.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2019-09-20 13:30:44,422 INFO L168 Benchmark]: CACSL2BoogieTranslator took 710.35 ms. Allocated memory was 133.2 MB in the beginning and 200.3 MB in the end (delta: 67.1 MB). Free memory was 87.5 MB in the beginning and 163.3 MB in the end (delta: -75.8 MB). Peak memory consumption was 26.3 MB. Max. memory is 7.1 GB. [2019-09-20 13:30:44,423 INFO L168 Benchmark]: Boogie Preprocessor took 90.14 ms. Allocated memory is still 200.3 MB. Free memory was 163.3 MB in the beginning and 159.6 MB in the end (delta: 3.8 MB). Peak memory consumption was 3.8 MB. Max. memory is 7.1 GB. [2019-09-20 13:30:44,425 INFO L168 Benchmark]: RCFGBuilder took 1138.81 ms. Allocated memory was 200.3 MB in the beginning and 224.9 MB in the end (delta: 24.6 MB). Free memory was 159.6 MB in the beginning and 194.1 MB in the end (delta: -34.5 MB). Peak memory consumption was 88.0 MB. Max. memory is 7.1 GB. [2019-09-20 13:30:44,426 INFO L168 Benchmark]: TraceAbstraction took 2662.89 ms. Allocated memory was 224.9 MB in the beginning and 261.6 MB in the end (delta: 36.7 MB). Free memory was 194.1 MB in the beginning and 111.1 MB in the end (delta: 83.0 MB). Peak memory consumption was 119.7 MB. Max. memory is 7.1 GB. [2019-09-20 13:30:44,430 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 133.2 MB. Free memory was 107.4 MB in the beginning and 107.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 710.35 ms. Allocated memory was 133.2 MB in the beginning and 200.3 MB in the end (delta: 67.1 MB). Free memory was 87.5 MB in the beginning and 163.3 MB in the end (delta: -75.8 MB). Peak memory consumption was 26.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 90.14 ms. Allocated memory is still 200.3 MB. Free memory was 163.3 MB in the beginning and 159.6 MB in the end (delta: 3.8 MB). Peak memory consumption was 3.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1138.81 ms. Allocated memory was 200.3 MB in the beginning and 224.9 MB in the end (delta: 24.6 MB). Free memory was 159.6 MB in the beginning and 194.1 MB in the end (delta: -34.5 MB). Peak memory consumption was 88.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2662.89 ms. Allocated memory was 224.9 MB in the beginning and 261.6 MB in the end (delta: 36.7 MB). Free memory was 194.1 MB in the beginning and 111.1 MB in the end (delta: 83.0 MB). Peak memory consumption was 119.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 827]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 35 procedures, 204 locations, 1 error locations. SAFE Result, 2.6s OverallTime, 6 OverallIterations, 2 TraceHistogramMax, 1.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 537 SDtfs, 344 SDslu, 1075 SDs, 0 SdLazy, 355 SolverSat, 58 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 142 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=207occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 1 AbstIntStrong, 1.0 AbsIntWeakeningRatio, 0.9690721649484536 AbsIntAvgWeakeningVarsNumRemoved, 0.0 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 4 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 368 NumberOfCodeBlocks, 368 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 362 ConstructedInterpolants, 0 QuantifiedInterpolants, 47662 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 5 PerfectInterpolantSequences, 27/31 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...