java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/SifaC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/dll-simple-white-blue-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-a32b1f7 [2019-08-18 06:59:03,001 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-08-18 06:59:03,003 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-08-18 06:59:03,016 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-08-18 06:59:03,016 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-08-18 06:59:03,017 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-08-18 06:59:03,019 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-08-18 06:59:03,020 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-08-18 06:59:03,024 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-08-18 06:59:03,025 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-08-18 06:59:03,026 INFO L181 SettingsManager]: Resetting Symbolic Interpretation preferences to default values [2019-08-18 06:59:03,032 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-08-18 06:59:03,033 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-08-18 06:59:03,034 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-08-18 06:59:03,037 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-08-18 06:59:03,040 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-08-18 06:59:03,041 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-08-18 06:59:03,041 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-08-18 06:59:03,045 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-08-18 06:59:03,047 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-08-18 06:59:03,051 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-08-18 06:59:03,054 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-08-18 06:59:03,057 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-08-18 06:59:03,057 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-08-18 06:59:03,062 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-08-18 06:59:03,063 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-08-18 06:59:03,063 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-08-18 06:59:03,064 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-08-18 06:59:03,066 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-08-18 06:59:03,067 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-08-18 06:59:03,067 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-08-18 06:59:03,068 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-08-18 06:59:03,069 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-08-18 06:59:03,071 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-08-18 06:59:03,073 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-08-18 06:59:03,073 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-08-18 06:59:03,074 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-08-18 06:59:03,075 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-08-18 06:59:03,075 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-08-18 06:59:03,078 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-08-18 06:59:03,078 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-08-18 06:59:03,080 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-08-18 06:59:03,106 INFO L113 SettingsManager]: Loading preferences was successful [2019-08-18 06:59:03,106 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-08-18 06:59:03,108 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-08-18 06:59:03,108 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-08-18 06:59:03,108 INFO L138 SettingsManager]: * Use SBE=true [2019-08-18 06:59:03,108 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-08-18 06:59:03,109 INFO L138 SettingsManager]: * sizeof long=4 [2019-08-18 06:59:03,109 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-08-18 06:59:03,109 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-08-18 06:59:03,109 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-08-18 06:59:03,110 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-08-18 06:59:03,110 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-08-18 06:59:03,111 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-08-18 06:59:03,111 INFO L138 SettingsManager]: * sizeof long double=12 [2019-08-18 06:59:03,111 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-08-18 06:59:03,111 INFO L138 SettingsManager]: * Use constant arrays=true [2019-08-18 06:59:03,112 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-08-18 06:59:03,112 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-08-18 06:59:03,112 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-08-18 06:59:03,112 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-08-18 06:59:03,113 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-08-18 06:59:03,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-08-18 06:59:03,113 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-08-18 06:59:03,113 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-08-18 06:59:03,113 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-08-18 06:59:03,114 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-08-18 06:59:03,114 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-08-18 06:59:03,114 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-08-18 06:59:03,114 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-08-18 06:59:03,154 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-08-18 06:59:03,173 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-08-18 06:59:03,178 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-08-18 06:59:03,179 INFO L271 PluginConnector]: Initializing CDTParser... [2019-08-18 06:59:03,180 INFO L275 PluginConnector]: CDTParser initialized [2019-08-18 06:59:03,180 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-simple-white-blue-1.i [2019-08-18 06:59:03,257 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fe0a7625/73e12e5bea7f4ff383416684f5c94c28/FLAG10cd4b956 [2019-08-18 06:59:03,800 INFO L306 CDTParser]: Found 1 translation units. [2019-08-18 06:59:03,800 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-simple-white-blue-1.i [2019-08-18 06:59:03,813 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fe0a7625/73e12e5bea7f4ff383416684f5c94c28/FLAG10cd4b956 [2019-08-18 06:59:04,060 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fe0a7625/73e12e5bea7f4ff383416684f5c94c28 [2019-08-18 06:59:04,069 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-08-18 06:59:04,071 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-08-18 06:59:04,072 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-08-18 06:59:04,072 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-08-18 06:59:04,076 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-08-18 06:59:04,077 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:59:04" (1/1) ... [2019-08-18 06:59:04,080 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56c3a3f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:59:04, skipping insertion in model container [2019-08-18 06:59:04,081 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:59:04" (1/1) ... [2019-08-18 06:59:04,088 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-08-18 06:59:04,129 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-08-18 06:59:04,572 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-08-18 06:59:04,583 INFO L188 MainTranslator]: Completed pre-run [2019-08-18 06:59:04,645 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-08-18 06:59:04,700 INFO L192 MainTranslator]: Completed translation [2019-08-18 06:59:04,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:59:04 WrapperNode [2019-08-18 06:59:04,701 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-08-18 06:59:04,702 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-08-18 06:59:04,702 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-08-18 06:59:04,702 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-08-18 06:59:04,716 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:59:04" (1/1) ... [2019-08-18 06:59:04,716 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:59:04" (1/1) ... [2019-08-18 06:59:04,737 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:59:04" (1/1) ... [2019-08-18 06:59:04,738 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:59:04" (1/1) ... [2019-08-18 06:59:04,759 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:59:04" (1/1) ... [2019-08-18 06:59:04,770 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:59:04" (1/1) ... [2019-08-18 06:59:04,774 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:59:04" (1/1) ... [2019-08-18 06:59:04,792 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-08-18 06:59:04,792 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-08-18 06:59:04,792 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-08-18 06:59:04,793 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-08-18 06:59:04,793 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:59:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-08-18 06:59:04,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-08-18 06:59:04,854 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-08-18 06:59:04,854 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-08-18 06:59:04,854 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-08-18 06:59:04,854 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-08-18 06:59:04,854 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-08-18 06:59:04,855 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-08-18 06:59:04,855 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-08-18 06:59:04,855 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-08-18 06:59:04,855 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-08-18 06:59:04,855 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-08-18 06:59:04,855 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-08-18 06:59:04,856 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-08-18 06:59:04,856 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-08-18 06:59:04,856 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-08-18 06:59:04,856 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-08-18 06:59:04,856 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-08-18 06:59:04,857 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-08-18 06:59:04,857 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-08-18 06:59:04,857 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-08-18 06:59:04,857 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-08-18 06:59:04,857 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-08-18 06:59:04,857 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-08-18 06:59:04,858 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-08-18 06:59:04,858 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-08-18 06:59:04,858 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-08-18 06:59:04,858 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-08-18 06:59:04,858 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-08-18 06:59:04,858 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-08-18 06:59:04,859 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-08-18 06:59:04,859 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-08-18 06:59:04,859 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-08-18 06:59:04,859 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-08-18 06:59:04,859 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-08-18 06:59:04,859 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-08-18 06:59:04,860 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-08-18 06:59:04,860 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-08-18 06:59:04,860 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-08-18 06:59:04,860 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-08-18 06:59:04,860 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-08-18 06:59:04,860 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-08-18 06:59:04,861 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-08-18 06:59:04,861 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-08-18 06:59:04,861 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-08-18 06:59:04,861 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-08-18 06:59:04,861 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-08-18 06:59:04,861 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-08-18 06:59:04,862 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-08-18 06:59:04,862 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-08-18 06:59:04,862 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-08-18 06:59:04,862 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-08-18 06:59:04,862 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-08-18 06:59:04,862 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-08-18 06:59:04,862 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-08-18 06:59:04,863 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-08-18 06:59:04,863 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-08-18 06:59:04,863 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-08-18 06:59:04,863 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-08-18 06:59:04,863 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-08-18 06:59:04,863 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-08-18 06:59:04,864 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-08-18 06:59:04,864 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-08-18 06:59:04,864 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-08-18 06:59:04,864 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-08-18 06:59:04,864 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-08-18 06:59:04,864 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-08-18 06:59:04,864 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-08-18 06:59:04,865 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-08-18 06:59:04,865 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-08-18 06:59:04,865 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-08-18 06:59:04,865 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-08-18 06:59:04,865 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-08-18 06:59:04,865 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-08-18 06:59:04,866 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-08-18 06:59:04,866 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-08-18 06:59:04,866 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-08-18 06:59:04,866 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-08-18 06:59:04,866 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-08-18 06:59:04,866 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-08-18 06:59:04,867 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-08-18 06:59:04,867 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-08-18 06:59:04,867 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-08-18 06:59:04,867 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-08-18 06:59:04,867 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-08-18 06:59:04,867 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-08-18 06:59:04,868 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-08-18 06:59:04,868 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-08-18 06:59:04,868 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-08-18 06:59:04,868 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-08-18 06:59:04,868 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-08-18 06:59:04,868 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-08-18 06:59:04,868 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-08-18 06:59:04,869 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-08-18 06:59:04,869 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-08-18 06:59:04,869 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-08-18 06:59:04,869 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-08-18 06:59:04,869 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-08-18 06:59:04,869 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-08-18 06:59:04,870 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-08-18 06:59:04,870 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-08-18 06:59:04,870 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-08-18 06:59:04,870 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-08-18 06:59:04,870 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-08-18 06:59:04,870 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-08-18 06:59:04,870 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-08-18 06:59:04,871 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-08-18 06:59:04,871 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-08-18 06:59:04,871 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-08-18 06:59:04,871 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-08-18 06:59:04,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-08-18 06:59:04,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-08-18 06:59:04,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-08-18 06:59:04,872 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-08-18 06:59:04,872 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-08-18 06:59:04,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-08-18 06:59:04,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-08-18 06:59:04,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-08-18 06:59:05,422 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-08-18 06:59:05,422 INFO L283 CfgBuilder]: Removed 8 assume(true) statements. [2019-08-18 06:59:05,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:59:05 BoogieIcfgContainer [2019-08-18 06:59:05,424 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-08-18 06:59:05,424 INFO L113 PluginConnector]: ------------------------Symbolic Interpretation---------------------------- [2019-08-18 06:59:05,425 INFO L271 PluginConnector]: Initializing Symbolic Interpretation... [2019-08-18 06:59:05,425 INFO L275 PluginConnector]: Symbolic Interpretation initialized [2019-08-18 06:59:05,426 INFO L185 PluginConnector]: Executing the observer SymbolicInterpretationObserver from plugin Symbolic Interpretation for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:59:05" (1/1) ... [2019-08-18 06:59:05,440 INFO L148 IcfgInterpreter]: Started Sifa with 1 locations of interest [2019-08-18 06:59:05,443 INFO L155 IcfgInterpreter]: Building call graph [2019-08-18 06:59:05,449 INFO L160 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-08-18 06:59:05,458 INFO L165 IcfgInterpreter]: Starting interpretation [2019-08-18 06:59:05,459 INFO L185 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 [2019-08-18 06:59:05,543 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-08-18 06:59:05,544 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-08-18 06:59:05,563 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-08-18 06:59:05,564 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-08-18 06:59:05,565 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-08-18 06:59:05,576 INFO L185 IcfgInterpreter]: Interpreting procedure main with input of size 23 [2019-08-18 06:59:05,617 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-08-18 06:59:05,760 WARN L188 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2019-08-18 06:59:05,761 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-08-18 06:59:05,771 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-08-18 06:59:05,882 WARN L188 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2019-08-18 06:59:05,883 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-08-18 06:59:05,885 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-08-18 06:59:05,886 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:152, output treesize:126 [2019-08-18 06:59:05,940 INFO L392 ElimStorePlain]: Different costs {2=[|v_#memory_$Pointer$.offset_10|, |v_#memory_int_13|, |v_#memory_$Pointer$.base_10|], 4=[|v_#memory_int_14|], 16=[|v_#memory_$Pointer$.offset_33|, |v_#memory_$Pointer$.base_33|]} [2019-08-18 06:59:05,952 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-08-18 06:59:06,987 WARN L188 SmtUtils]: Spent 1.03 s on a formula simplification that was a NOOP. DAG size: 131 [2019-08-18 06:59:06,988 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-08-18 06:59:07,015 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-08-18 06:59:08,159 WARN L188 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 128 [2019-08-18 06:59:08,160 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-08-18 06:59:08,180 INFO L496 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-08-18 06:59:09,038 WARN L188 SmtUtils]: Spent 857.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2019-08-18 06:59:09,039 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-08-18 06:59:09,066 INFO L496 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-08-18 06:59:09,848 WARN L188 SmtUtils]: Spent 781.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2019-08-18 06:59:09,849 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-08-18 06:59:09,862 INFO L496 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-08-18 06:59:10,957 WARN L188 SmtUtils]: Spent 1.09 s on a formula simplification that was a NOOP. DAG size: 117 [2019-08-18 06:59:10,957 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-08-18 06:59:10,977 INFO L496 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-08-18 06:59:11,912 WARN L188 SmtUtils]: Spent 935.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2019-08-18 06:59:11,913 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-08-18 06:59:11,915 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 6 dim-2 vars, End of recursive call: 8 dim-0 vars, and 1 xjuncts. [2019-08-18 06:59:11,916 INFO L221 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:420, output treesize:551 [2019-08-18 06:59:11,962 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-18 06:59:12,005 INFO L392 ElimStorePlain]: Different costs {2=[|v_#memory_$Pointer$.offset_10|, |v_#memory_int_34|, |v_#memory_$Pointer$.base_10|], 4=[|v_#memory_int_14|], 6=[|v_#memory_int_13|], 16=[|v_#memory_$Pointer$.base_34|, |v_#memory_$Pointer$.offset_34|]} [2019-08-18 06:59:12,120 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-08-18 06:59:12,216 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-08-18 06:59:39,931 WARN L188 SmtUtils]: Spent 27.71 s on a formula simplification that was a NOOP. DAG size: 223 [2019-08-18 06:59:39,932 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-08-18 06:59:40,175 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-08-18 07:00:04,147 WARN L188 SmtUtils]: Spent 23.97 s on a formula simplification that was a NOOP. DAG size: 217 [2019-08-18 07:00:04,147 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-08-18 07:00:04,334 INFO L496 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-08-18 07:00:04,488 INFO L496 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-08-18 07:00:25,519 WARN L188 SmtUtils]: Spent 21.03 s on a formula simplification that was a NOOP. DAG size: 215 [2019-08-18 07:00:25,520 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-08-18 07:00:25,816 INFO L496 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-08-18 07:00:26,017 INFO L496 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-08-18 07:00:53,806 WARN L188 SmtUtils]: Spent 27.79 s on a formula simplification that was a NOOP. DAG size: 220 [2019-08-18 07:00:53,807 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-08-18 07:00:53,939 INFO L496 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-08-18 07:00:54,186 INFO L496 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-08-18 07:01:23,876 WARN L188 SmtUtils]: Spent 29.69 s on a formula simplification that was a NOOP. DAG size: 216 [2019-08-18 07:01:23,877 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-08-18 07:01:24,021 INFO L496 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-08-18 07:01:48,942 WARN L188 SmtUtils]: Spent 24.92 s on a formula simplification that was a NOOP. DAG size: 212 [2019-08-18 07:01:48,943 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-08-18 07:01:49,135 INFO L496 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-08-18 07:02:17,618 WARN L188 SmtUtils]: Spent 28.48 s on a formula simplification that was a NOOP. DAG size: 208 [2019-08-18 07:02:17,619 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-08-18 07:02:17,624 INFO L496 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 7 dim-2 vars, End of recursive call: 21 dim-0 vars, and 2 xjuncts. [2019-08-18 07:02:17,624 INFO L221 ElimStorePlain]: Needed 12 recursive calls to eliminate 18 variables, input treesize:5904, output treesize:6595 [2019-08-18 07:02:17,972 INFO L392 ElimStorePlain]: Different costs {0=[|v_#length_14|], 1=[|v_#valid_21|]} [2019-08-18 07:02:17,990 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-08-18 07:02:17,991 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-08-18 07:02:18,182 WARN L188 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2019-08-18 07:02:18,182 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-08-18 07:02:18,208 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2019-08-18 07:02:18,208 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-08-18 07:02:18,385 WARN L188 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2019-08-18 07:02:18,386 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-08-18 07:02:18,391 INFO L392 ElimStorePlain]: Different costs {0=[|v_#memory_int_35|], 2=[|v_#memory_$Pointer$.offset_10|, |v_#memory_int_13|, |v_#memory_$Pointer$.base_10|], 4=[|v_#memory_int_14|], 8=[|v_#memory_$Pointer$.base_35|, |v_#memory_$Pointer$.offset_35|]} [2019-08-18 07:02:18,411 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2019-08-18 07:02:18,411 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-08-18 07:02:18,555 WARN L188 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2019-08-18 07:02:18,556 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-08-18 07:02:18,561 INFO L496 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-08-18 07:02:18,689 WARN L188 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2019-08-18 07:02:18,689 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-08-18 07:02:18,702 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2019-08-18 07:02:18,702 INFO L496 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-08-18 07:02:18,810 WARN L188 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2019-08-18 07:02:18,810 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-08-18 07:02:18,814 INFO L496 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-08-18 07:02:18,902 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-08-18 07:02:18,916 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-08-18 07:02:18,917 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2019-08-18 07:02:18,918 INFO L496 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-08-18 07:02:18,994 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-08-18 07:02:19,020 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-08-18 07:02:19,040 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-08-18 07:02:19,172 WARN L188 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2019-08-18 07:02:19,173 INFO L341 Elim1Store]: treesize reduction 50, result has 66.2 percent of original size [2019-08-18 07:02:19,174 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 97 treesize of output 142 [2019-08-18 07:02:19,175 INFO L496 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-08-18 07:02:19,379 WARN L188 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 68 [2019-08-18 07:02:19,380 INFO L567 ElimStorePlain]: treesize reduction 83, result has 69.5 percent of original size [2019-08-18 07:02:19,392 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-08-18 07:02:19,581 WARN L188 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2019-08-18 07:02:19,581 INFO L341 Elim1Store]: treesize reduction 12, result has 92.9 percent of original size [2019-08-18 07:02:19,582 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 97 treesize of output 202 [2019-08-18 07:02:19,583 INFO L496 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2019-08-18 07:02:19,811 WARN L188 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 71 [2019-08-18 07:02:19,811 INFO L567 ElimStorePlain]: treesize reduction 137, result has 52.6 percent of original size [2019-08-18 07:02:19,812 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-18 07:02:19,813 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-18 07:02:19,813 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-08-18 07:02:19,814 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-18 07:02:19,815 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-18 07:02:19,818 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-08-18 07:02:19,818 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-18 07:02:19,819 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-18 07:02:19,821 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 7 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-08-18 07:02:19,822 INFO L221 ElimStorePlain]: Needed 10 recursive calls to eliminate 11 variables, input treesize:312, output treesize:134 [2019-08-18 07:02:19,837 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-18 07:02:19,843 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-18 07:02:19,853 INFO L392 ElimStorePlain]: Different costs {0=[|v_#length_15|], 1=[|v_#valid_22|]} [2019-08-18 07:02:19,872 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-08-18 07:02:19,873 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-08-18 07:02:19,983 WARN L188 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2019-08-18 07:02:19,984 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-08-18 07:02:19,998 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2019-08-18 07:02:19,999 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-08-18 07:02:20,106 WARN L188 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2019-08-18 07:02:20,107 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-08-18 07:02:20,109 INFO L392 ElimStorePlain]: Different costs {0=[|v_#memory_int_36|], 2=[|v_#memory_$Pointer$.base_23|, |v_#memory_$Pointer$.offset_23|], 4=[|v_#memory_$Pointer$.base_36|, |v_#memory_$Pointer$.offset_36|, |v_#memory_int_24|]} [2019-08-18 07:02:20,118 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2019-08-18 07:02:20,119 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-08-18 07:02:20,201 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-08-18 07:02:20,205 INFO L496 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-08-18 07:02:20,274 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-08-18 07:02:20,279 INFO L496 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-08-18 07:02:20,332 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-08-18 07:02:20,342 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-08-18 07:02:20,412 INFO L341 Elim1Store]: treesize reduction 7, result has 89.4 percent of original size [2019-08-18 07:02:20,413 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2019-08-18 07:02:20,414 INFO L496 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-08-18 07:02:20,606 WARN L188 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2019-08-18 07:02:20,606 INFO L567 ElimStorePlain]: treesize reduction 34, result has 78.8 percent of original size [2019-08-18 07:02:20,618 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-08-18 07:02:20,704 INFO L341 Elim1Store]: treesize reduction 7, result has 89.4 percent of original size [2019-08-18 07:02:20,705 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2019-08-18 07:02:20,706 INFO L496 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-08-18 07:02:20,854 WARN L188 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2019-08-18 07:02:20,855 INFO L567 ElimStorePlain]: treesize reduction 34, result has 78.9 percent of original size [2019-08-18 07:02:20,862 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-08-18 07:02:20,863 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2019-08-18 07:02:20,864 INFO L496 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-08-18 07:02:20,935 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-08-18 07:02:20,937 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-08-18 07:02:20,938 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-08-18 07:02:20,940 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 6 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-08-18 07:02:20,941 INFO L221 ElimStorePlain]: Needed 9 recursive calls to eliminate 10 variables, input treesize:175, output treesize:50 [2019-08-18 07:02:20,955 INFO L392 ElimStorePlain]: Different costs {2=[|v_#memory_int_37|, |v_#memory_int_28|], 10=[|v_#memory_$Pointer$.base_37|, |v_#memory_$Pointer$.offset_37|]} [2019-08-18 07:02:20,993 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-08-18 07:02:21,013 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 166 [2019-08-18 07:02:21,015 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-08-18 07:02:21,044 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-08-18 07:02:21,053 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 166 [2019-08-18 07:02:21,054 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-08-18 07:02:21,293 WARN L188 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2019-08-18 07:02:21,294 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-08-18 07:02:21,340 INFO L341 Elim1Store]: treesize reduction 29, result has 42.0 percent of original size [2019-08-18 07:02:21,341 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 159 [2019-08-18 07:02:21,343 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-08-18 07:02:21,382 INFO L341 Elim1Store]: treesize reduction 29, result has 42.0 percent of original size [2019-08-18 07:02:21,383 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 159 [2019-08-18 07:02:21,384 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-08-18 07:02:21,550 WARN L188 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2019-08-18 07:02:21,550 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-08-18 07:02:21,577 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-08-18 07:02:21,589 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-08-18 07:02:21,630 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-08-18 07:02:21,631 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 156 treesize of output 174 [2019-08-18 07:02:21,633 INFO L496 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-08-18 07:02:21,647 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-08-18 07:02:21,706 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-08-18 07:02:21,707 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 156 treesize of output 208 [2019-08-18 07:02:21,708 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-18 07:02:21,709 INFO L496 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-08-18 07:02:22,066 WARN L188 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2019-08-18 07:02:22,067 INFO L567 ElimStorePlain]: treesize reduction 79, result has 78.6 percent of original size [2019-08-18 07:02:22,068 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.symbolicinterpretation has thrown an exception: java.lang.UnsupportedOperationException: expected NNF at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:236) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive$TermWalker.walk(NonRecursive.java:146) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:195) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:122) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:113) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder.(ArrayOccurrenceAnalysis.java:181) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis.(ArrayOccurrenceAnalysis.java:74) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:275) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:253) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.ElimStorePlain.eliminateOne(ElimStorePlain.java:553) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:466) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:216) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.PartialQuantifierElimination.quantifier(PartialQuantifierElimination.java:146) at de.uni_freiburg.informatik.ultimate.lib.symbolicinterpretation.SymbolicTools$EliminatingTermDomainOperationProvider.constructQuantifiedFormula(SymbolicTools.java:242) at de.uni_freiburg.informatik.ultimate.lib.symbolicinterpretation.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:232) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:130) at de.uni_freiburg.informatik.ultimate.lib.symbolicinterpretation.SymbolicTools.post(SymbolicTools.java:106) at de.uni_freiburg.informatik.ultimate.lib.symbolicinterpretation.DagInterpreter.ipretInternal(DagInterpreter.java:200) at de.uni_freiburg.informatik.ultimate.lib.symbolicinterpretation.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:182) at de.uni_freiburg.informatik.ultimate.lib.symbolicinterpretation.DagInterpreter.ipretTrans(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.symbolicinterpretation.DagInterpreter.ipretNode(DagInterpreter.java:133) at de.uni_freiburg.informatik.ultimate.lib.symbolicinterpretation.DagInterpreter.interpret(DagInterpreter.java:115) at de.uni_freiburg.informatik.ultimate.lib.symbolicinterpretation.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:125) at de.uni_freiburg.informatik.ultimate.lib.symbolicinterpretation.IcfgInterpreter.interpret(IcfgInterpreter.java:116) at de.uni_freiburg.informatik.ultimate.plugins.symbolicinterpretation.SymbolicInterpretationObserver.processIcfg(SymbolicInterpretationObserver.java:77) at de.uni_freiburg.informatik.ultimate.plugins.symbolicinterpretation.SymbolicInterpretationObserver.process(SymbolicInterpretationObserver.java:69) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.CFGWalker.runObserver(CFGWalker.java:57) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:156) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-08-18 07:02:22,073 INFO L168 Benchmark]: Toolchain (without parser) took 198002.60 ms. Allocated memory was 140.5 MB in the beginning and 311.4 MB in the end (delta: 170.9 MB). Free memory was 87.1 MB in the beginning and 185.4 MB in the end (delta: -98.3 MB). Peak memory consumption was 174.1 MB. Max. memory is 7.1 GB. [2019-08-18 07:02:22,074 INFO L168 Benchmark]: CDTParser took 0.51 ms. Allocated memory is still 140.5 MB. Free memory was 106.5 MB in the beginning and 106.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-08-18 07:02:22,075 INFO L168 Benchmark]: CACSL2BoogieTranslator took 629.75 ms. Allocated memory was 140.5 MB in the beginning and 200.3 MB in the end (delta: 59.8 MB). Free memory was 86.9 MB in the beginning and 166.3 MB in the end (delta: -79.4 MB). Peak memory consumption was 24.2 MB. Max. memory is 7.1 GB. [2019-08-18 07:02:22,076 INFO L168 Benchmark]: Boogie Preprocessor took 90.01 ms. Allocated memory is still 200.3 MB. Free memory was 166.3 MB in the beginning and 163.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB. [2019-08-18 07:02:22,076 INFO L168 Benchmark]: RCFGBuilder took 631.75 ms. Allocated memory is still 200.3 MB. Free memory was 163.2 MB in the beginning and 117.3 MB in the end (delta: 45.8 MB). Peak memory consumption was 45.8 MB. Max. memory is 7.1 GB. [2019-08-18 07:02:22,077 INFO L168 Benchmark]: Symbolic Interpretation took 196647.27 ms. Allocated memory was 200.3 MB in the beginning and 311.4 MB in the end (delta: 111.1 MB). Free memory was 117.3 MB in the beginning and 185.4 MB in the end (delta: -68.0 MB). Peak memory consumption was 144.6 MB. Max. memory is 7.1 GB. [2019-08-18 07:02:22,081 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.symbolicinterpretation: - ExceptionOrErrorResult: UnsupportedOperationException: expected NNF de.uni_freiburg.informatik.ultimate.plugins.symbolicinterpretation: UnsupportedOperationException: expected NNF: de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:236) * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.51 ms. Allocated memory is still 140.5 MB. Free memory was 106.5 MB in the beginning and 106.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 629.75 ms. Allocated memory was 140.5 MB in the beginning and 200.3 MB in the end (delta: 59.8 MB). Free memory was 86.9 MB in the beginning and 166.3 MB in the end (delta: -79.4 MB). Peak memory consumption was 24.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 90.01 ms. Allocated memory is still 200.3 MB. Free memory was 166.3 MB in the beginning and 163.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 631.75 ms. Allocated memory is still 200.3 MB. Free memory was 163.2 MB in the beginning and 117.3 MB in the end (delta: 45.8 MB). Peak memory consumption was 45.8 MB. Max. memory is 7.1 GB. * Symbolic Interpretation took 196647.27 ms. Allocated memory was 200.3 MB in the beginning and 311.4 MB in the end (delta: 111.1 MB). Free memory was 117.3 MB in the beginning and 185.4 MB in the end (delta: -68.0 MB). Peak memory consumption was 144.6 MB. Max. memory is 7.1 GB. RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...