./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/terminator_03_true-unreach-call_true-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_52f1414b-a6c6-4f86-a688-76ae5defe33e/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_52f1414b-a6c6-4f86-a688-76ae5defe33e/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_52f1414b-a6c6-4f86-a688-76ae5defe33e/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_52f1414b-a6c6-4f86-a688-76ae5defe33e/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/terminator_03_true-unreach-call_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_52f1414b-a6c6-4f86-a688-76ae5defe33e/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_52f1414b-a6c6-4f86-a688-76ae5defe33e/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a269e8b2c2a55ee83f0497e8cbfb0a6499d0714f .................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-08 13:55:09,677 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-08 13:55:09,677 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-08 13:55:09,684 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-08 13:55:09,684 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-08 13:55:09,684 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-08 13:55:09,685 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-08 13:55:09,686 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-08 13:55:09,687 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-08 13:55:09,687 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-08 13:55:09,688 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-08 13:55:09,688 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-08 13:55:09,689 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-08 13:55:09,689 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-08 13:55:09,690 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-08 13:55:09,690 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-08 13:55:09,691 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-08 13:55:09,691 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-08 13:55:09,692 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-08 13:55:09,693 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-08 13:55:09,694 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-08 13:55:09,694 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-08 13:55:09,695 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-08 13:55:09,696 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-08 13:55:09,696 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-08 13:55:09,696 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-08 13:55:09,697 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-08 13:55:09,697 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-08 13:55:09,698 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-08 13:55:09,698 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-08 13:55:09,698 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-08 13:55:09,699 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-08 13:55:09,699 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-08 13:55:09,699 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-08 13:55:09,700 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-08 13:55:09,700 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-08 13:55:09,700 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_52f1414b-a6c6-4f86-a688-76ae5defe33e/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-08 13:55:09,707 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-08 13:55:09,707 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-08 13:55:09,708 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-08 13:55:09,708 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-08 13:55:09,708 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-08 13:55:09,709 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-08 13:55:09,709 INFO L133 SettingsManager]: * Use SBE=true [2018-12-08 13:55:09,709 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-08 13:55:09,709 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-08 13:55:09,709 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-08 13:55:09,709 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-08 13:55:09,709 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-08 13:55:09,709 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-08 13:55:09,710 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-08 13:55:09,710 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-08 13:55:09,710 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-08 13:55:09,710 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-08 13:55:09,710 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-08 13:55:09,710 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-08 13:55:09,710 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-08 13:55:09,710 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-08 13:55:09,711 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-08 13:55:09,711 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-08 13:55:09,711 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-08 13:55:09,711 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-08 13:55:09,711 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-08 13:55:09,711 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-08 13:55:09,711 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-08 13:55:09,711 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-08 13:55:09,712 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-08 13:55:09,712 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_52f1414b-a6c6-4f86-a688-76ae5defe33e/bin-2019/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a269e8b2c2a55ee83f0497e8cbfb0a6499d0714f [2018-12-08 13:55:09,729 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-08 13:55:09,736 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-08 13:55:09,738 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-08 13:55:09,739 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-08 13:55:09,739 INFO L276 PluginConnector]: CDTParser initialized [2018-12-08 13:55:09,739 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_52f1414b-a6c6-4f86-a688-76ae5defe33e/bin-2019/uautomizer/../../sv-benchmarks/c/loops/terminator_03_true-unreach-call_true-termination.i [2018-12-08 13:55:09,773 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_52f1414b-a6c6-4f86-a688-76ae5defe33e/bin-2019/uautomizer/data/9374eebfd/a426df2d29b04a94a58bfaf959e6651d/FLAG08ac79df2 [2018-12-08 13:55:10,139 INFO L307 CDTParser]: Found 1 translation units. [2018-12-08 13:55:10,139 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_52f1414b-a6c6-4f86-a688-76ae5defe33e/sv-benchmarks/c/loops/terminator_03_true-unreach-call_true-termination.i [2018-12-08 13:55:10,143 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_52f1414b-a6c6-4f86-a688-76ae5defe33e/bin-2019/uautomizer/data/9374eebfd/a426df2d29b04a94a58bfaf959e6651d/FLAG08ac79df2 [2018-12-08 13:55:10,513 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_52f1414b-a6c6-4f86-a688-76ae5defe33e/bin-2019/uautomizer/data/9374eebfd/a426df2d29b04a94a58bfaf959e6651d [2018-12-08 13:55:10,514 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-08 13:55:10,515 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-08 13:55:10,516 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-08 13:55:10,516 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-08 13:55:10,518 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-08 13:55:10,518 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 01:55:10" (1/1) ... [2018-12-08 13:55:10,520 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@409ee820 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 01:55:10, skipping insertion in model container [2018-12-08 13:55:10,520 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 01:55:10" (1/1) ... [2018-12-08 13:55:10,525 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-08 13:55:10,535 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-08 13:55:10,615 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 13:55:10,618 INFO L191 MainTranslator]: Completed pre-run [2018-12-08 13:55:10,626 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 13:55:10,634 INFO L195 MainTranslator]: Completed translation [2018-12-08 13:55:10,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 01:55:10 WrapperNode [2018-12-08 13:55:10,634 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-08 13:55:10,634 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-08 13:55:10,635 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-08 13:55:10,635 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-08 13:55:10,639 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 01:55:10" (1/1) ... [2018-12-08 13:55:10,642 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 01:55:10" (1/1) ... [2018-12-08 13:55:10,646 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-08 13:55:10,646 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-08 13:55:10,646 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-08 13:55:10,646 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-08 13:55:10,651 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 01:55:10" (1/1) ... [2018-12-08 13:55:10,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 01:55:10" (1/1) ... [2018-12-08 13:55:10,652 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 01:55:10" (1/1) ... [2018-12-08 13:55:10,652 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 01:55:10" (1/1) ... [2018-12-08 13:55:10,654 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 01:55:10" (1/1) ... [2018-12-08 13:55:10,656 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 01:55:10" (1/1) ... [2018-12-08 13:55:10,657 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 01:55:10" (1/1) ... [2018-12-08 13:55:10,657 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-08 13:55:10,658 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-08 13:55:10,658 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-08 13:55:10,658 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-08 13:55:10,658 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 01:55:10" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_52f1414b-a6c6-4f86-a688-76ae5defe33e/bin-2019/uautomizer/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 [2018-12-08 13:55:10,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-08 13:55:10,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-08 13:55:10,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-08 13:55:10,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-08 13:55:10,717 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-08 13:55:10,717 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-08 13:55:10,718 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-12-08 13:55:10,718 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-12-08 13:55:10,807 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-08 13:55:10,807 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-08 13:55:10,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 01:55:10 BoogieIcfgContainer [2018-12-08 13:55:10,807 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-08 13:55:10,808 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-08 13:55:10,808 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-08 13:55:10,811 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-08 13:55:10,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.12 01:55:10" (1/3) ... [2018-12-08 13:55:10,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49a1e863 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 01:55:10, skipping insertion in model container [2018-12-08 13:55:10,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 01:55:10" (2/3) ... [2018-12-08 13:55:10,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49a1e863 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 01:55:10, skipping insertion in model container [2018-12-08 13:55:10,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 01:55:10" (3/3) ... [2018-12-08 13:55:10,814 INFO L112 eAbstractionObserver]: Analyzing ICFG terminator_03_true-unreach-call_true-termination.i [2018-12-08 13:55:10,822 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-08 13:55:10,827 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-08 13:55:10,841 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-08 13:55:10,865 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-08 13:55:10,865 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-08 13:55:10,866 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-08 13:55:10,866 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-08 13:55:10,866 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-08 13:55:10,866 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-08 13:55:10,866 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-08 13:55:10,866 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-08 13:55:10,866 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-08 13:55:10,880 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-12-08 13:55:10,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-12-08 13:55:10,884 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 13:55:10,884 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 13:55:10,886 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 13:55:10,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 13:55:10,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1995182865, now seen corresponding path program 1 times [2018-12-08 13:55:10,891 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 13:55:10,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 13:55:10,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:55:10,922 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 13:55:10,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:55:10,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 13:55:10,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 13:55:10,990 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 13:55:10,990 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-08 13:55:10,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 13:55:11,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 13:55:11,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 13:55:11,002 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2018-12-08 13:55:11,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 13:55:11,045 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2018-12-08 13:55:11,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 13:55:11,047 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-12-08 13:55:11,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 13:55:11,051 INFO L225 Difference]: With dead ends: 40 [2018-12-08 13:55:11,051 INFO L226 Difference]: Without dead ends: 13 [2018-12-08 13:55:11,053 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-08 13:55:11,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-12-08 13:55:11,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-12-08 13:55:11,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-12-08 13:55:11,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-12-08 13:55:11,073 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-12-08 13:55:11,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 13:55:11,073 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-12-08 13:55:11,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 13:55:11,073 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-12-08 13:55:11,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-12-08 13:55:11,073 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 13:55:11,073 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 13:55:11,074 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 13:55:11,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 13:55:11,074 INFO L82 PathProgramCache]: Analyzing trace with hash -2146425897, now seen corresponding path program 1 times [2018-12-08 13:55:11,074 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 13:55:11,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 13:55:11,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:55:11,075 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 13:55:11,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:55:11,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 13:55:11,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 13:55:11,110 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 13:55:11,110 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-08 13:55:11,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-08 13:55:11,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-08 13:55:11,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-08 13:55:11,112 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2018-12-08 13:55:11,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 13:55:11,132 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-12-08 13:55:11,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-08 13:55:11,133 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2018-12-08 13:55:11,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 13:55:11,133 INFO L225 Difference]: With dead ends: 13 [2018-12-08 13:55:11,133 INFO L226 Difference]: Without dead ends: 0 [2018-12-08 13:55:11,134 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-12-08 13:55:11,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-08 13:55:11,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-08 13:55:11,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-08 13:55:11,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-08 13:55:11,135 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2018-12-08 13:55:11,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 13:55:11,135 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-08 13:55:11,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-08 13:55:11,135 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-08 13:55:11,136 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-08 13:55:11,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-08 13:55:11,168 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-12-08 13:55:11,168 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-08 13:55:11,168 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-08 13:55:11,168 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-08 13:55:11,168 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-08 13:55:11,168 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-08 13:55:11,169 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 11 22) the Hoare annotation is: true [2018-12-08 13:55:11,169 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 11 22) no Hoare annotation was computed. [2018-12-08 13:55:11,169 INFO L448 ceAbstractionStarter]: For program point L20(line 20) no Hoare annotation was computed. [2018-12-08 13:55:11,169 INFO L448 ceAbstractionStarter]: For program point L15(lines 15 19) no Hoare annotation was computed. [2018-12-08 13:55:11,169 INFO L448 ceAbstractionStarter]: For program point L14(line 14) no Hoare annotation was computed. [2018-12-08 13:55:11,169 INFO L444 ceAbstractionStarter]: At program point L16-2(lines 16 18) the Hoare annotation is: (< 0 main_~y~0) [2018-12-08 13:55:11,169 INFO L444 ceAbstractionStarter]: At program point L15-1(lines 15 19) the Hoare annotation is: (or (< 99 main_~x~0) (<= main_~y~0 0)) [2018-12-08 13:55:11,169 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 11 22) no Hoare annotation was computed. [2018-12-08 13:55:11,170 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-12-08 13:55:11,170 INFO L451 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-12-08 13:55:11,170 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-12-08 13:55:11,170 INFO L448 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-12-08 13:55:11,170 INFO L448 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-12-08 13:55:11,170 INFO L448 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-12-08 13:55:11,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.12 01:55:11 BoogieIcfgContainer [2018-12-08 13:55:11,180 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-08 13:55:11,181 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-08 13:55:11,181 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-08 13:55:11,181 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-08 13:55:11,181 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 01:55:10" (3/4) ... [2018-12-08 13:55:11,184 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-08 13:55:11,190 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-08 13:55:11,190 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-08 13:55:11,190 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-12-08 13:55:11,193 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-12-08 13:55:11,193 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-12-08 13:55:11,194 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-08 13:55:11,220 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_52f1414b-a6c6-4f86-a688-76ae5defe33e/bin-2019/uautomizer/witness.graphml [2018-12-08 13:55:11,220 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-08 13:55:11,220 INFO L168 Benchmark]: Toolchain (without parser) took 705.56 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 63.4 MB). Free memory was 961.4 MB in the beginning and 998.7 MB in the end (delta: -37.3 MB). Peak memory consumption was 26.1 MB. Max. memory is 11.5 GB. [2018-12-08 13:55:11,221 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 13:55:11,221 INFO L168 Benchmark]: CACSL2BoogieTranslator took 118.44 ms. Allocated memory is still 1.0 GB. Free memory was 961.4 MB in the beginning and 950.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-08 13:55:11,222 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.43 ms. Allocated memory is still 1.0 GB. Free memory is still 950.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 13:55:11,222 INFO L168 Benchmark]: Boogie Preprocessor took 11.42 ms. Allocated memory is still 1.0 GB. Free memory is still 950.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 13:55:11,222 INFO L168 Benchmark]: RCFGBuilder took 149.68 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 63.4 MB). Free memory was 950.6 MB in the beginning and 1.0 GB in the end (delta: -90.6 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. [2018-12-08 13:55:11,222 INFO L168 Benchmark]: TraceAbstraction took 372.39 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 998.7 MB in the end (delta: 42.6 MB). Peak memory consumption was 42.6 MB. Max. memory is 11.5 GB. [2018-12-08 13:55:11,223 INFO L168 Benchmark]: Witness Printer took 39.16 ms. Allocated memory is still 1.1 GB. Free memory is still 998.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 13:55:11,224 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 118.44 ms. Allocated memory is still 1.0 GB. Free memory was 961.4 MB in the beginning and 950.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 11.43 ms. Allocated memory is still 1.0 GB. Free memory is still 950.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 11.42 ms. Allocated memory is still 1.0 GB. Free memory is still 950.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 149.68 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 63.4 MB). Free memory was 950.6 MB in the beginning and 1.0 GB in the end (delta: -90.6 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 372.39 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 998.7 MB in the end (delta: 42.6 MB). Peak memory consumption was 42.6 MB. Max. memory is 11.5 GB. * Witness Printer took 39.16 ms. Allocated memory is still 1.1 GB. Free memory is still 998.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: 0 < y - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. SAFE Result, 0.3s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 31 SDtfs, 10 SDslu, 80 SDs, 0 SdLazy, 26 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 11 NumberOfFragments, 15 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 23 NumberOfCodeBlocks, 23 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 413 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...