java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-ToothlessTaipan_OCT-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem02_label40_true-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-3142e50-m [2018-09-11 20:09:47,313 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-11 20:09:47,322 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-11 20:09:47,342 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-11 20:09:47,342 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-11 20:09:47,344 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-11 20:09:47,345 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-11 20:09:47,349 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-11 20:09:47,352 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-11 20:09:47,357 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-11 20:09:47,361 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-11 20:09:47,362 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-11 20:09:47,363 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-11 20:09:47,368 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-11 20:09:47,374 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-11 20:09:47,375 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-11 20:09:47,376 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-11 20:09:47,382 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-11 20:09:47,388 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-11 20:09:47,391 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-11 20:09:47,394 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-11 20:09:47,397 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-11 20:09:47,405 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-11 20:09:47,405 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-11 20:09:47,405 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-11 20:09:47,408 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-11 20:09:47,409 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-11 20:09:47,410 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-11 20:09:47,412 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-11 20:09:47,413 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-11 20:09:47,415 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-11 20:09:47,416 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-11 20:09:47,416 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-11 20:09:47,418 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-11 20:09:47,421 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-11 20:09:47,422 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-11 20:09:47,422 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-ToothlessTaipan_OCT-OldIcfg.epf [2018-09-11 20:09:47,459 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-11 20:09:47,461 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-11 20:09:47,463 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-11 20:09:47,463 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-11 20:09:47,463 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-11 20:09:47,464 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-11 20:09:47,464 INFO L133 SettingsManager]: * Congruence Domain=false [2018-09-11 20:09:47,464 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-11 20:09:47,464 INFO L133 SettingsManager]: * Abstract domain=OctagonDomain [2018-09-11 20:09:47,465 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-11 20:09:47,465 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-11 20:09:47,465 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-11 20:09:47,466 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-11 20:09:47,467 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-11 20:09:47,467 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-11 20:09:47,467 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-11 20:09:47,467 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-11 20:09:47,469 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-11 20:09:47,470 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-11 20:09:47,470 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-11 20:09:47,470 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-11 20:09:47,470 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-11 20:09:47,471 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-11 20:09:47,471 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-11 20:09:47,471 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-11 20:09:47,471 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-11 20:09:47,472 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-11 20:09:47,472 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-11 20:09:47,472 INFO L133 SettingsManager]: * Trace refinement strategy=TOOTHLESS_TAIPAN [2018-09-11 20:09:47,472 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-11 20:09:47,472 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-11 20:09:47,473 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-11 20:09:47,473 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-11 20:09:47,473 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-11 20:09:47,570 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-11 20:09:47,594 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-11 20:09:47,600 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-11 20:09:47,603 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-11 20:09:47,604 INFO L276 PluginConnector]: CDTParser initialized [2018-09-11 20:09:47,605 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label40_true-unreach-call_false-termination.c [2018-09-11 20:09:48,033 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/031f2a732/45a968ccfdb744edaba3e6a1a2106354/FLAG1ad911569 [2018-09-11 20:09:48,353 INFO L276 CDTParser]: Found 1 translation units. [2018-09-11 20:09:48,357 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label40_true-unreach-call_false-termination.c [2018-09-11 20:09:48,383 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/031f2a732/45a968ccfdb744edaba3e6a1a2106354/FLAG1ad911569 [2018-09-11 20:09:48,415 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/031f2a732/45a968ccfdb744edaba3e6a1a2106354 [2018-09-11 20:09:48,434 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-11 20:09:48,441 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-11 20:09:48,443 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-11 20:09:48,443 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-11 20:09:48,455 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-11 20:09:48,456 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:09:48" (1/1) ... [2018-09-11 20:09:48,461 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cc12951 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:09:48, skipping insertion in model container [2018-09-11 20:09:48,462 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:09:48" (1/1) ... [2018-09-11 20:09:48,766 INFO L180 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-09-11 20:09:49,108 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-11 20:09:49,132 INFO L431 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-11 20:09:49,289 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-11 20:09:49,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:09:49 WrapperNode [2018-09-11 20:09:49,341 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-11 20:09:49,342 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-11 20:09:49,342 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-11 20:09:49,342 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-11 20:09:49,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:09:49" (1/1) ... [2018-09-11 20:09:49,391 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:09:49" (1/1) ... [2018-09-11 20:09:49,487 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-11 20:09:49,488 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-11 20:09:49,488 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-11 20:09:49,488 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-11 20:09:49,673 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:09:49" (1/1) ... [2018-09-11 20:09:49,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:09:49" (1/1) ... [2018-09-11 20:09:49,680 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:09:49" (1/1) ... [2018-09-11 20:09:49,680 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:09:49" (1/1) ... [2018-09-11 20:09:49,704 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:09:49" (1/1) ... [2018-09-11 20:09:49,737 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:09:49" (1/1) ... [2018-09-11 20:09:49,752 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:09:49" (1/1) ... [2018-09-11 20:09:49,767 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-11 20:09:49,768 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-11 20:09:49,768 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-11 20:09:49,769 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-11 20:09:49,770 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:09:49" (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 [2018-09-11 20:09:49,864 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_output [2018-09-11 20:09:49,865 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_output [2018-09-11 20:09:49,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-11 20:09:49,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-11 20:09:49,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-11 20:09:49,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-11 20:09:49,867 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-11 20:09:49,867 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-11 20:09:53,777 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-11 20:09:53,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:09:53 BoogieIcfgContainer [2018-09-11 20:09:53,783 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-11 20:09:53,784 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-11 20:09:53,785 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-11 20:09:53,798 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-11 20:09:53,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 08:09:48" (1/3) ... [2018-09-11 20:09:53,802 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@577b606a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:09:53, skipping insertion in model container [2018-09-11 20:09:53,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:09:49" (2/3) ... [2018-09-11 20:09:53,802 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@577b606a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:09:53, skipping insertion in model container [2018-09-11 20:09:53,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:09:53" (3/3) ... [2018-09-11 20:09:53,806 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem02_label40_true-unreach-call_false-termination.c [2018-09-11 20:09:53,820 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-11 20:09:53,835 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-11 20:09:53,926 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-11 20:09:53,928 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-11 20:09:53,928 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-11 20:09:53,928 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-11 20:09:53,928 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-11 20:09:53,929 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-11 20:09:53,929 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-11 20:09:53,929 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-11 20:09:53,929 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-11 20:09:53,984 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states. [2018-09-11 20:09:54,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-11 20:09:54,002 INFO L368 BasicCegarLoop]: Found error trace [2018-09-11 20:09:54,004 INFO L376 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, 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] [2018-09-11 20:09:54,006 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-11 20:09:54,014 INFO L82 PathProgramCache]: Analyzing trace with hash 754560056, now seen corresponding path program 1 times [2018-09-11 20:09:54,017 INFO L69 tionRefinementEngine]: Using refinement strategy ToothlessTaipanRefinementStrategy [2018-09-11 20:09:54,019 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 97 with the following transitions: [2018-09-11 20:09:54,023 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [16], [20], [24], [28], [32], [36], [40], [51], [62], [66], [70], [74], [78], [82], [86], [90], [94], [98], [102], [106], [110], [114], [118], [122], [126], [130], [134], [138], [142], [146], [150], [154], [158], [169], [173], [177], [181], [185], [189], [193], [197], [208], [212], [216], [220], [231], [235], [239], [243], [247], [251], [255], [266], [270], [281], [285], [296], [307], [311], [315], [319], [323], [327], [331], [342], [346], [350], [354], [358], [362], [366], [370], [377], [385], [393], [401], [409], [417], [425], [433], [437], [439], [862], [863], [867], [871], [877], [881], [888], [889], [890], [892] [2018-09-11 20:09:54,123 INFO L148 AbstractInterpreter]: Using domain OctagonDomain [2018-09-11 20:09:54,124 INFO L101 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=2) [2018-09-11 20:10:12,675 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-09-11 20:10:12,676 INFO L272 AbstractInterpreter]: Visited 95 different actions 95 times. Never merged. Never widened. Never found a fixpoint. Largest state had 37 variables. [2018-09-11 20:10:12,713 INFO L399 sIntCurrentIteration]: Generating AbsInt predicates [2018-09-11 20:10:15,383 INFO L232 lantSequenceWeakener]: Weakened 94 states. On average, predicates are now at 80.58% of their original sizes. [2018-09-11 20:10:15,384 INFO L412 sIntCurrentIteration]: Unifying AI predicates [2018-09-11 20:10:17,097 INFO L423 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-09-11 20:10:17,098 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-11 20:10:17,099 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-09-11 20:10:17,099 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-11 20:10:17,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-11 20:10:17,115 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-11 20:10:17,116 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2018-09-11 20:10:17,119 INFO L87 Difference]: Start difference. First operand 237 states. Second operand 12 states. [2018-09-11 20:10:22,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-11 20:10:22,430 INFO L93 Difference]: Finished difference Result 622 states and 1061 transitions. [2018-09-11 20:10:22,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-11 20:10:22,432 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 96 [2018-09-11 20:10:22,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-11 20:10:22,450 INFO L225 Difference]: With dead ends: 622 [2018-09-11 20:10:22,450 INFO L226 Difference]: Without dead ends: 383 [2018-09-11 20:10:22,457 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 101 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2018-09-11 20:10:22,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2018-09-11 20:10:22,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 380. [2018-09-11 20:10:22,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 380 states. [2018-09-11 20:10:22,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 531 transitions. [2018-09-11 20:10:22,533 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 531 transitions. Word has length 96 [2018-09-11 20:10:22,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-11 20:10:22,534 INFO L480 AbstractCegarLoop]: Abstraction has 380 states and 531 transitions. [2018-09-11 20:10:22,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-11 20:10:22,534 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 531 transitions. [2018-09-11 20:10:22,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-11 20:10:22,540 INFO L368 BasicCegarLoop]: Found error trace [2018-09-11 20:10:22,541 INFO L376 BasicCegarLoop]: trace histogram [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, 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] [2018-09-11 20:10:22,541 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-11 20:10:22,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1013685657, now seen corresponding path program 1 times [2018-09-11 20:10:22,542 INFO L69 tionRefinementEngine]: Using refinement strategy ToothlessTaipanRefinementStrategy [2018-09-11 20:10:22,542 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 107 with the following transitions: [2018-09-11 20:10:22,542 INFO L202 CegarAbsIntRunner]: [0], [4], [7], [8], [12], [16], [20], [24], [28], [32], [36], [40], [51], [62], [66], [70], [74], [78], [82], [86], [90], [94], [98], [102], [106], [110], [114], [118], [122], [126], [130], [134], [138], [142], [146], [150], [154], [158], [169], [173], [177], [181], [185], [189], [193], [197], [208], [212], [216], [220], [231], [235], [239], [243], [247], [251], [255], [266], [270], [281], [285], [296], [307], [311], [315], [319], [323], [327], [331], [342], [346], [350], [354], [358], [362], [366], [370], [377], [385], [393], [401], [409], [417], [425], [433], [437], [439], [861], [862], [863], [867], [871], [877], [881], [883], [888], [889], [890], [892], [893] [2018-09-11 20:10:22,550 INFO L148 AbstractInterpreter]: Using domain OctagonDomain [2018-09-11 20:10:22,551 INFO L101 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=2) [2018-09-11 20:11:18,958 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-09-11 20:11:18,959 INFO L272 AbstractInterpreter]: Visited 99 different actions 192 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 38 variables. [2018-09-11 20:11:18,969 INFO L399 sIntCurrentIteration]: Generating AbsInt predicates [2018-09-11 20:11:25,431 INFO L232 lantSequenceWeakener]: Weakened 104 states. On average, predicates are now at 80.65% of their original sizes. [2018-09-11 20:11:25,432 INFO L412 sIntCurrentIteration]: Unifying AI predicates [2018-09-11 20:11:29,533 INFO L423 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-09-11 20:11:29,534 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-11 20:11:29,534 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2018-09-11 20:11:29,534 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-11 20:11:29,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-11 20:11:29,536 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-11 20:11:29,536 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2018-09-11 20:11:29,537 INFO L87 Difference]: Start difference. First operand 380 states and 531 transitions. Second operand 20 states. [2018-09-11 20:11:42,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-11 20:11:42,137 INFO L93 Difference]: Finished difference Result 909 states and 1351 transitions. [2018-09-11 20:11:42,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-11 20:11:42,145 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 106 [2018-09-11 20:11:42,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-11 20:11:42,153 INFO L225 Difference]: With dead ends: 909 [2018-09-11 20:11:42,154 INFO L226 Difference]: Without dead ends: 535 [2018-09-11 20:11:42,160 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 128 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=452, Invalid=1354, Unknown=0, NotChecked=0, Total=1806 [2018-09-11 20:11:42,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2018-09-11 20:11:42,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 527. [2018-09-11 20:11:42,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 527 states. [2018-09-11 20:11:42,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 690 transitions. [2018-09-11 20:11:42,214 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 690 transitions. Word has length 106 [2018-09-11 20:11:42,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-11 20:11:42,215 INFO L480 AbstractCegarLoop]: Abstraction has 527 states and 690 transitions. [2018-09-11 20:11:42,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-11 20:11:42,215 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 690 transitions. [2018-09-11 20:11:42,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-11 20:11:42,219 INFO L368 BasicCegarLoop]: Found error trace [2018-09-11 20:11:42,220 INFO L376 BasicCegarLoop]: trace histogram [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, 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] [2018-09-11 20:11:42,220 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-11 20:11:42,221 INFO L82 PathProgramCache]: Analyzing trace with hash 501572625, now seen corresponding path program 1 times [2018-09-11 20:11:42,221 INFO L69 tionRefinementEngine]: Using refinement strategy ToothlessTaipanRefinementStrategy [2018-09-11 20:11:42,221 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 111 with the following transitions: [2018-09-11 20:11:42,222 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [16], [20], [23], [24], [28], [32], [36], [40], [51], [62], [66], [70], [74], [78], [82], [86], [90], [94], [98], [102], [106], [110], [114], [118], [122], [126], [130], [134], [138], [142], [146], [150], [154], [158], [169], [173], [177], [181], [185], [189], [193], [197], [208], [212], [216], [220], [231], [235], [239], [243], [247], [251], [255], [266], [270], [281], [285], [296], [307], [311], [315], [319], [323], [327], [331], [342], [346], [350], [354], [358], [362], [366], [370], [377], [385], [393], [401], [409], [417], [425], [433], [437], [439], [861], [862], [863], [867], [871], [877], [881], [883], [888], [889], [890], [892], [893] [2018-09-11 20:11:42,226 INFO L148 AbstractInterpreter]: Using domain OctagonDomain [2018-09-11 20:11:42,227 INFO L101 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=2) [2018-09-11 20:12:39,063 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-09-11 20:12:39,063 INFO L272 AbstractInterpreter]: Visited 99 different actions 192 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 38 variables. [2018-09-11 20:12:39,086 INFO L399 sIntCurrentIteration]: Generating AbsInt predicates [2018-09-11 20:12:44,072 INFO L232 lantSequenceWeakener]: Weakened 108 states. On average, predicates are now at 80.65% of their original sizes. [2018-09-11 20:12:44,072 INFO L412 sIntCurrentIteration]: Unifying AI predicates [2018-09-11 20:12:47,508 INFO L423 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-09-11 20:12:47,508 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-11 20:12:47,508 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2018-09-11 20:12:47,509 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-11 20:12:47,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-11 20:12:47,510 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-11 20:12:47,510 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2018-09-11 20:12:47,510 INFO L87 Difference]: Start difference. First operand 527 states and 690 transitions. Second operand 20 states. [2018-09-11 20:13:00,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-11 20:13:00,759 INFO L93 Difference]: Finished difference Result 1201 states and 1667 transitions. [2018-09-11 20:13:00,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-11 20:13:00,764 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 110 [2018-09-11 20:13:00,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-11 20:13:00,769 INFO L225 Difference]: With dead ends: 1201 [2018-09-11 20:13:00,769 INFO L226 Difference]: Without dead ends: 680 [2018-09-11 20:13:00,772 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 132 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=441, Invalid=1365, Unknown=0, NotChecked=0, Total=1806 [2018-09-11 20:13:00,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2018-09-11 20:13:00,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 674. [2018-09-11 20:13:00,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 674 states. [2018-09-11 20:13:00,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 849 transitions. [2018-09-11 20:13:00,811 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 849 transitions. Word has length 110 [2018-09-11 20:13:00,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-11 20:13:00,812 INFO L480 AbstractCegarLoop]: Abstraction has 674 states and 849 transitions. [2018-09-11 20:13:00,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-11 20:13:00,812 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 849 transitions. [2018-09-11 20:13:00,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-11 20:13:00,817 INFO L368 BasicCegarLoop]: Found error trace [2018-09-11 20:13:00,817 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 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] [2018-09-11 20:13:00,818 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-11 20:13:00,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1858131890, now seen corresponding path program 1 times [2018-09-11 20:13:00,819 INFO L69 tionRefinementEngine]: Using refinement strategy ToothlessTaipanRefinementStrategy [2018-09-11 20:13:00,820 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 121 with the following transitions: [2018-09-11 20:13:00,820 INFO L202 CegarAbsIntRunner]: [0], [4], [7], [8], [12], [16], [20], [23], [24], [28], [32], [36], [40], [51], [62], [66], [70], [74], [78], [82], [86], [90], [94], [98], [102], [106], [110], [114], [118], [122], [126], [130], [134], [138], [142], [146], [150], [154], [158], [169], [173], [177], [181], [185], [189], [193], [197], [208], [212], [216], [220], [231], [235], [239], [243], [247], [251], [255], [266], [270], [281], [285], [296], [307], [311], [315], [319], [323], [327], [331], [342], [346], [350], [354], [358], [362], [366], [370], [377], [385], [393], [401], [409], [417], [425], [433], [437], [439], [861], [862], [863], [867], [871], [877], [881], [883], [888], [889], [890], [892], [893] [2018-09-11 20:13:00,826 INFO L148 AbstractInterpreter]: Using domain OctagonDomain [2018-09-11 20:13:00,826 INFO L101 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=2) Received shutdown request... [2018-09-11 20:14:14,278 WARN L572 FixpointEngine]: Received timeout, aborting fixpoint engine [2018-09-11 20:14:14,280 WARN L158 AbstractInterpreter]: Abstract interpretation run out of time [2018-09-11 20:14:14,280 INFO L443 BasicCegarLoop]: Counterexample might be feasible [2018-09-11 20:14:14,320 WARN L209 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2018-09-11 20:14:14,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.09 08:14:14 BoogieIcfgContainer [2018-09-11 20:14:14,321 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-11 20:14:14,322 INFO L168 Benchmark]: Toolchain (without parser) took 265887.33 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 2.0 GB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -156.1 MB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. [2018-09-11 20:14:14,324 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-11 20:14:14,325 INFO L168 Benchmark]: CACSL2BoogieTranslator took 898.21 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2018-09-11 20:14:14,326 INFO L168 Benchmark]: Boogie Procedure Inliner took 145.29 ms. Allocated memory is still 1.5 GB. Free memory is still 1.3 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-11 20:14:14,326 INFO L168 Benchmark]: Boogie Preprocessor took 280.04 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 701.5 MB). Free memory was 1.3 GB in the beginning and 2.1 GB in the end (delta: -788.2 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. [2018-09-11 20:14:14,327 INFO L168 Benchmark]: RCFGBuilder took 4014.97 ms. Allocated memory is still 2.2 GB. Free memory was 2.1 GB in the beginning and 2.0 GB in the end (delta: 110.6 MB). Peak memory consumption was 110.6 MB. Max. memory is 7.1 GB. [2018-09-11 20:14:14,328 INFO L168 Benchmark]: TraceAbstraction took 260536.58 ms. Allocated memory was 2.2 GB in the beginning and 3.5 GB in the end (delta: 1.3 GB). Free memory was 2.0 GB in the beginning and 1.5 GB in the end (delta: 479.3 MB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. [2018-09-11 20:14:14,333 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 898.21 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 145.29 ms. Allocated memory is still 1.5 GB. Free memory is still 1.3 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 280.04 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 701.5 MB). Free memory was 1.3 GB in the beginning and 2.1 GB in the end (delta: -788.2 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 4014.97 ms. Allocated memory is still 2.2 GB. Free memory was 2.1 GB in the beginning and 2.0 GB in the end (delta: 110.6 MB). Peak memory consumption was 110.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 260536.58 ms. Allocated memory was 2.2 GB in the beginning and 3.5 GB in the end (delta: 1.3 GB). Free memory was 2.0 GB in the beginning and 1.5 GB in the end (delta: 479.3 MB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 439]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L7] int a= 1; [L8] int e= 5; [L9] int d= 4; [L10] int f= 6; [L11] int c= 3; [L14] int u = 21; [L15] int v = 22; [L16] int w = 23; [L17] int x = 24; [L18] int y = 25; [L19] int z = 26; [L22] int a25 = 0; [L23] int a11 = 0; [L24] int a28 = 7; [L25] int a19 = 1; [L26] int a21 = 1; [L27] int a17 = 8; [L603] int output = -1; [L606] COND TRUE 1 [L609] int input; [L610] input = __VERIFIER_nondet_int() [L611] COND FALSE !((input != 1) && (input != 3) && (input != 4) && (input != 5) && (input != 6)) [L614] CALL, EXPR calculate_output(input) [L30] COND FALSE !((((!(a11==1)&&((a19==1)&&((input==4)&&((!(a25==1)&&(a28==8))||((a25==1)&&(a28==9))))))&&(a21==1))&&(a17==8))) [L35] COND TRUE ((a17==8)&&((((!(a11==1)&&((a21==1)&&(input==6)))&&(a28==7))&&(a19==1))&&!(a25==1))) [L36] a28 = 10 [L37] RET return 22; [L614] EXPR calculate_output(input) [L614] output = calculate_output(input) [L606] COND TRUE 1 [L609] int input; [L610] input = __VERIFIER_nondet_int() [L611] COND FALSE !((input != 1) && (input != 3) && (input != 4) && (input != 5) && (input != 6)) [L614] CALL, EXPR calculate_output(input) [L30] COND FALSE !((((!(a11==1)&&((a19==1)&&((input==4)&&((!(a25==1)&&(a28==8))||((a25==1)&&(a28==9))))))&&(a21==1))&&(a17==8))) [L35] COND FALSE !(((a17==8)&&((((!(a11==1)&&((a21==1)&&(input==6)))&&(a28==7))&&(a19==1))&&!(a25==1)))) [L38] COND FALSE !(((a21==1)&&((a19==1)&&((((((a25==1)||!(a25==1))&&(input==3))&&(a17==9))&&(a11==1))&&(a28==9))))) [L42] COND FALSE !(((a28==9)&&(!(a19==1)&&((a21==1)&&((((input==4)&&!(a25==1))&&!(a11==1))&&(a17==8)))))) [L47] COND FALSE !(((((a17==8)&&((((input==1)&&((a25==1)||!(a25==1)))&&!(a11==1))&&(a19==1)))&&(a21==1))&&(a28==10))) [L50] COND TRUE ((a19==1)&&(!(a25==1)&&((a21==1)&&((((input==1)&&(a17==8))&&!(a11==1))&&(a28==7))))) [L51] a28 = 11 [L52] a25 = 1 [L53] RET return 26; [L614] EXPR calculate_output(input) [L614] output = calculate_output(input) [L606] COND TRUE 1 [L609] int input; [L610] input = __VERIFIER_nondet_int() [L611] COND FALSE !((input != 1) && (input != 3) && (input != 4) && (input != 5) && (input != 6)) [L614] CALL calculate_output(input) [L30] COND FALSE !((((!(a11==1)&&((a19==1)&&((input==4)&&((!(a25==1)&&(a28==8))||((a25==1)&&(a28==9))))))&&(a21==1))&&(a17==8))) [L35] COND FALSE !(((a17==8)&&((((!(a11==1)&&((a21==1)&&(input==6)))&&(a28==7))&&(a19==1))&&!(a25==1)))) [L38] COND FALSE !(((a21==1)&&((a19==1)&&((((((a25==1)||!(a25==1))&&(input==3))&&(a17==9))&&(a11==1))&&(a28==9))))) [L42] COND FALSE !(((a28==9)&&(!(a19==1)&&((a21==1)&&((((input==4)&&!(a25==1))&&!(a11==1))&&(a17==8)))))) [L47] COND FALSE !(((((a17==8)&&((((input==1)&&((a25==1)||!(a25==1)))&&!(a11==1))&&(a19==1)))&&(a21==1))&&(a28==10))) [L50] COND FALSE !(((a19==1)&&(!(a25==1)&&((a21==1)&&((((input==1)&&(a17==8))&&!(a11==1))&&(a28==7)))))) [L54] COND FALSE !(((((!(a19==1)&&((input==1)&&((((a25==1)&&(a28==7))||((a28==7)&&!(a25==1)))||((a25==1)&&(a28==8)))))&&(a21==1))&&(a17==8))&&!(a11==1))) [L59] COND FALSE !(((a19==1)&&(((((input==1)&&(((a25==1)&&(a28==8))||(((a28==7)&&(a25==1))||((a28==7)&&!(a25==1)))))&&(a11==1))&&(a21==1))&&(a17==9)))) [L65] COND FALSE !(((a19==1)&&(((a17==8)&&(((input==6)&&((!(a25==1)&&(a28==8))||((a25==1)&&(a28==9))))&&!(a11==1)))&&(a21==1)))) [L69] COND FALSE !((!(a11==1)&&((((a21==1)&&((input==1)&&(((a28==8)&&!(a25==1))||((a25==1)&&(a28==9)))))&&!(a19==1))&&(a17==8)))) [L74] COND FALSE !((!(a19==1)&&(((((a17==8)&&((a25==1)&&(input==3)))&&(a28==10))&&!(a11==1))&&(a21==1)))) [L82] COND FALSE !((((!(a19==1)&&((a21==1)&&((((a25==1)&&(a28==8))||(((a28==7)&&(a25==1))||((a28==7)&&!(a25==1))))&&(input==4))))&&!(a11==1))&&(a17==8))) [L91] COND FALSE !(((a17==8)&&((a21==1)&&((a25==1)&&((a19==1)&&(!(a11==1)&&((a28==11)&&(input==3)))))))) [L95] COND FALSE !(((a28==9)&&(((!(a19==1)&&(((input==3)&&!(a11==1))&&(a17==8)))&&!(a25==1))&&(a21==1)))) [L99] COND FALSE !(((!(a11==1)&&(((a28==11)&&((a25==1)&&((input==1)&&(a19==1))))&&(a17==8)))&&(a21==1))) [L106] COND FALSE !((((a11==1)&&((((((a25==1)&&(a28==8))||(((a25==1)&&(a28==7))||(!(a25==1)&&(a28==7))))&&(input==6))&&(a19==1))&&(a17==9)))&&(a21==1))) [L113] COND FALSE !(((a17==8)&&((a21==1)&&(!(a11==1)&&(!(a19==1)&&(((!(a25==1)&&(a28==8))||((a25==1)&&(a28==9)))&&(input==3))))))) [L119] COND FALSE !((((((a21==1)&&((a28==10)&&((input==1)&&(a25==1))))&&!(a11==1))&&(a17==8))&&!(a19==1))) [L123] COND FALSE !((!(a11==1)&&(!(a19==1)&&(((a17==8)&&((input==6)&&((((a25==1)&&(a28==7))||((a28==7)&&!(a25==1)))||((a28==8)&&(a25==1)))))&&(a21==1))))) [L130] COND FALSE !(((((a17==8)&&(!(a19==1)&&(((input==6)&&(a21==1))&&!(a25==1))))&&!(a11==1))&&(a28==9))) [L134] COND FALSE !((!(a11==1)&&((!(a25==1)&&(((a21==1)&&((input==1)&&(a19==1)))&&(a17==8)))&&(a28==11)))) [L139] COND FALSE !((((a11==1)&&(((a19==1)&&((a21==1)&&(((a25==1)||!(a25==1))&&(input==4))))&&(a17==9)))&&(a28==9))) [L143] COND FALSE !(((!(a11==1)&&((a28==9)&&(((!(a19==1)&&(input==5))&&!(a25==1))&&(a21==1))))&&(a17==8))) [L148] COND FALSE !(((!(a11==1)&&(((a17==8)&&(((((a28==7)&&(a25==1))||(!(a25==1)&&(a28==7)))||((a28==8)&&(a25==1)))&&(input==3)))&&!(a19==1)))&&(a21==1))) [L154] COND FALSE !(((a21==1)&&(!(a19==1)&&((((input==5)&&(((a28==8)&&(a25==1))||(((a25==1)&&(a28==7))||(!(a25==1)&&(a28==7)))))&&!(a11==1))&&(a17==8))))) [L159] COND FALSE !((((a17==9)&&(((a28==8)&&(((input==1)&&(a19==1))&&!(a25==1)))&&(a11==1)))&&(a21==1))) [L165] COND FALSE !((((a21==1)&&((a19==1)&&((a28==7)&&((a17==8)&&(!(a25==1)&&(input==3))))))&&!(a11==1))) [L169] COND FALSE !(((a28==11)&&(((a17==8)&&((((input==6)&&(a21==1))&&(a19==1))&&!(a25==1)))&&!(a11==1)))) [L175] COND FALSE !(((!(a11==1)&&(((a17==8)&&((a21==1)&&((input==3)&&(a28==8))))&&(a19==1)))&&(a25==1))) [L179] COND FALSE !((((a21==1)&&(((a19==1)&&(((((a25==1)&&(a28==7))||((a28==7)&&!(a25==1)))||((a25==1)&&(a28==8)))&&(input==4)))&&(a11==1)))&&(a17==9))) [L185] COND FALSE !((((!(a11==1)&&((a17==8)&&(((input==4)&&(a19==1))&&(a28==8))))&&(a21==1))&&(a25==1))) [L187] COND FALSE !(((a19==1)&&((((((input==4)&&(a21==1))&&(a28==9))&&!(a25==1))&&!(a11==1))&&(a17==8)))) [L189] COND FALSE !(((a17==8)&&((((((input==1)&&(a21==1))&&!(a11==1))&&(a19==1))&&!(a25==1))&&(a28==9)))) [L191] COND FALSE !((((((((input==4)&&((a25==1)||!(a25==1)))&&!(a11==1))&&(a21==1))&&(a17==8))&&(a28==10))&&(a19==1))) [L194] COND FALSE !(((!(a25==1)&&((a11==1)&&((a28==8)&&(((a17==9)&&(input==4))&&(a19==1)))))&&(a21==1))) [L198] COND FALSE !((!(a19==1)&&((a17==8)&&((a28==10)&&(((a25==1)&&(!(a11==1)&&(input==5)))&&(a21==1)))))) [L202] COND FALSE !((((((a21==1)&&((input==1)&&((!(a25==1)&&(a28==8))||((a25==1)&&(a28==9)))))&&(a17==8))&&!(a11==1))&&(a19==1))) [L212] COND FALSE !(((a21==1)&&((((a19==1)&&((a25==1)&&((a28==11)&&(input==6))))&&!(a11==1))&&(a17==8)))) [L215] COND FALSE !((!(a11==1)&&((a19==1)&&((a28==10)&&(((((a25==1)||!(a25==1))&&(input==5))&&(a17==8))&&(a21==1)))))) [L218] COND FALSE !((((((a17==9)&&((((a25==1)||!(a25==1))&&(input==6))&&(a11==1)))&&(a19==1))&&(a21==1))&&(a28==9))) [L223] COND FALSE !((((a17==8)&&(((((input==6)&&(a25==1))&&!(a19==1))&&!(a11==1))&&(a28==10)))&&(a21==1))) [L225] COND FALSE !(((!(a19==1)&&((a17==8)&&(!(a11==1)&&((input==1)&&((((a28==10)&&!(a25==1))||((a25==1)&&(a28==11)))||(!(a25==1)&&(a28==11)))))))&&(a21==1))) [L232] COND FALSE !((((((((input==1)&&(a21==1))&&(a28==9))&&!(a19==1))&&!(a25==1))&&(a17==8))&&!(a11==1))) [L234] COND FALSE !(((a17==8)&&(((!(a11==1)&&((!(a25==1)&&(input==4))&&(a19==1)))&&(a28==7))&&(a21==1)))) [L237] COND FALSE !((!(a11==1)&&(((a17==8)&&((((!(a25==1)&&(a28==11))||((!(a25==1)&&(a28==10))||((a28==11)&&(a25==1))))&&(input==3))&&(a21==1)))&&!(a19==1)))) [L248] COND FALSE !(((((!(a11==1)&&(((!(a25==1)&&(a28==8))||((a25==1)&&(a28==9)))&&(input==5)))&&(a21==1))&&!(a19==1))&&(a17==8))) [L253] COND FALSE !((((a17==9)&&(((((input==1)&&((a25==1)||!(a25==1)))&&(a11==1))&&(a21==1))&&(a19==1)))&&(a28==9))) [L259] COND FALSE !((!(a11==1)&&((a19==1)&&(((((a28==9)&&(input==6))&&(a21==1))&&(a17==8))&&!(a25==1))))) [L261] COND FALSE !(((a17==9)&&((a21==1)&&((a11==1)&&(((input==3)&&(((a25==1)&&(a28==8))||(((a28==7)&&(a25==1))||(!(a25==1)&&(a28==7)))))&&(a19==1)))))) [L276] COND FALSE !(((a28==7)&&((a17==8)&&(!(a25==1)&&((a21==1)&&((a19==1)&&((input==5)&&!(a11==1)))))))) [L280] COND FALSE !(((a28==8)&&((a21==1)&&((!(a11==1)&&(((input==1)&&(a17==8))&&(a19==1)))&&(a25==1))))) [L283] COND FALSE !((((((a17==8)&&(((input==6)&&((a25==1)||!(a25==1)))&&(a21==1)))&&(a28==10))&&!(a11==1))&&(a19==1))) [L286] COND FALSE !(((!(a11==1)&&((!(a19==1)&&(((!(a25==1)&&(a28==11))||(((a28==10)&&!(a25==1))||((a25==1)&&(a28==11))))&&(input==5)))&&(a17==8)))&&(a21==1))) [L291] COND FALSE !(((a17==8)&&(((a21==1)&&(!(a11==1)&&((a25==1)&&((a28==8)&&(input==6)))))&&(a19==1)))) [L293] COND FALSE !((((a19==1)&&((a17==8)&&(((!(a25==1)&&(input==5))&&(a21==1))&&!(a11==1))))&&(a28==11))) [L297] COND FALSE !(((a11==1)&&(((a17==9)&&((a28==9)&&((a19==1)&&(((a25==1)||!(a25==1))&&(input==5)))))&&(a21==1)))) [L309] COND FALSE !((((((((input==3)&&(a19==1))&&(a21==1))&&(a17==8))&&!(a25==1))&&(a28==11))&&!(a11==1))) [L314] COND FALSE !(((a19==1)&&((a21==1)&&((((input==5)&&(((a25==1)&&(a28==8))||(((a28==7)&&(a25==1))||(!(a25==1)&&(a28==7)))))&&(a11==1))&&(a17==9))))) [L328] COND FALSE !((((a19==1)&&(((!(a11==1)&&(((a25==1)||!(a25==1))&&(input==3)))&&(a28==10))&&(a21==1)))&&(a17==8))) [L331] COND FALSE !(((!(a11==1)&&(((((input==4)&&(a17==8))&&!(a25==1))&&(a21==1))&&(a28==11)))&&(a19==1))) [L337] COND FALSE !((((!(a19==1)&&(((input==4)&&(((!(a25==1)&&(a28==10))||((a28==11)&&(a25==1)))||(!(a25==1)&&(a28==11))))&&(a21==1)))&&(a17==8))&&!(a11==1))) [L349] COND FALSE !((!(a11==1)&&(((a17==8)&&((((a25==1)&&(input==4))&&(a19==1))&&(a28==11)))&&(a21==1)))) [L354] COND FALSE !((((((a21==1)&&((((a28==8)&&!(a25==1))||((a28==9)&&(a25==1)))&&(input==6)))&&!(a11==1))&&!(a19==1))&&(a17==8))) [L361] COND FALSE !(((a19==1)&&((((a21==1)&&((!(a25==1)&&(input==3))&&(a17==9)))&&(a28==8))&&(a11==1)))) [L368] COND FALSE !(((a17==8)&&(((a21==1)&&(((input==5)&&((!(a25==1)&&(a28==8))||((a28==9)&&(a25==1))))&&(a19==1)))&&!(a11==1)))) [L375] COND FALSE !(((a19==1)&&(((((a17==8)&&((input==5)&&!(a11==1)))&&(a21==1))&&(a25==1))&&(a28==8)))) [L378] COND FALSE !((((!(a11==1)&&((((a21==1)&&(input==4))&&(a28==10))&&(a17==8)))&&!(a19==1))&&(a25==1))) [L380] COND FALSE !(((a28==8)&&(((a19==1)&&((a11==1)&&(!(a25==1)&&((a17==9)&&(input==6)))))&&(a21==1)))) [L389] COND FALSE !((!(a11==1)&&((((a21==1)&&((input==6)&&((((a28==10)&&!(a25==1))||((a25==1)&&(a28==11)))||(!(a25==1)&&(a28==11)))))&&(a17==8))&&!(a19==1)))) [L394] COND FALSE !((((((!(a25==1)&&((a19==1)&&(input==3)))&&(a28==9))&&(a21==1))&&(a17==8))&&!(a11==1))) [L398] COND FALSE !((((a17==8)&&((((input==4)&&(((a28==8)&&!(a25==1))||((a25==1)&&(a28==9))))&&(a21==1))&&!(a19==1)))&&!(a11==1))) [L402] COND FALSE !((((!(a11==1)&&((((a19==1)&&(input==5))&&(a17==8))&&(a21==1)))&&(a28==9))&&!(a25==1))) [L404] COND FALSE !((((a11==1)&&((a19==1)&&((a21==1)&&(((a17==9)&&(input==5))&&!(a25==1)))))&&(a28==8))) [L407] COND FALSE !((!(a11==1)&&((a21==1)&&(((a19==1)&&((a17==8)&&((a25==1)&&(input==5))))&&(a28==11))))) [L409] COND FALSE !(((a19==1)&&((a17==8)&&(((((!(a25==1)&&(a28==8))||((a25==1)&&(a28==9)))&&(input==3))&&!(a11==1))&&(a21==1))))) [L414] COND FALSE !((((((!(a25==1)&&(a11==1))&&(a28==7))&&!(a19==1))&&(a21==1))&&(a17==8))) [L417] COND FALSE !(((((((a25==1)&&(a11==1))&&(a28==10))&&(a19==1))&&(a21==1))&&(a17==8))) [L420] COND FALSE !(((((((a25==1)&&!(a11==1))&&(a28==7))&&(a19==1))&&(a21==1))&&(a17==8))) [L423] COND FALSE !(((((((a25==1)&&(a11==1))&&(a28==7))&&(a19==1))&&(a21==1))&&(a17==7))) [L426] COND FALSE !(((((((a25==1)&&(a11==1))&&(a28==9))&&(a19==1))&&(a21==1))&&(a17==8))) [L429] COND FALSE !(((((((a25==1)&&(a11==1))&&(a28==9))&&!(a19==1))&&(a21==1))&&(a17==7))) [L432] COND FALSE !((((((!(a25==1)&&(a11==1))&&(a28==10))&&!(a19==1))&&(a21==1))&&(a17==7))) [L435] COND FALSE !((((((!(a25==1)&&(a11==1))&&(a28==9))&&(a19==1))&&(a21==1))&&(a17==8))) [L438] COND TRUE (((((!(a25==1)&&(a11==1))&&(a28==7))&&(a19==1))&&(a21==1))&&(a17==8)) [L439] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 237 locations, 1 error locations. UNKNOWN Result, 260.4s OverallTime, 4 OverallIterations, 3 TraceHistogramMax, 31.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 726 SDtfs, 3678 SDslu, 457 SDs, 0 SdLazy, 3190 SolverSat, 483 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 22.6s Time, PredicateUnifierStatistics: 6 DeclaredPredicates, 361 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 15.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=674occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 205.4s AbstIntTime, 4 AbstIntIterations, 3 AbstIntStrong, 0.9930716357645328 AbsIntWeakeningRatio, 0.24271844660194175 AbsIntAvgWeakeningVarsNumRemoved, 602.5987055016182 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 3 MinimizatonAttempts, 17 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: No data available, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem02_label40_true-unreach-call_false-termination.c_svcomp-Reach-64bit-ToothlessTaipan_OCT-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-11_20-14-14-350.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem02_label40_true-unreach-call_false-termination.c_svcomp-Reach-64bit-ToothlessTaipan_OCT-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-11_20-14-14-350.csv Completed graceful shutdown