./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec5_product20_true-unreach-call_false-termination.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_7df3f120-4f4d-45fc-be71-7f16a652acef/bin-2019/ukojak/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_7df3f120-4f4d-45fc-be71-7f16a652acef/bin-2019/ukojak/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_7df3f120-4f4d-45fc-be71-7f16a652acef/bin-2019/ukojak/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_7df3f120-4f4d-45fc-be71-7f16a652acef/bin-2019/ukojak/config/KojakReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec5_product20_true-unreach-call_false-termination.cil.c -s /tmp/vcloud-vcloud-master/worker/working_dir_7df3f120-4f4d-45fc-be71-7f16a652acef/bin-2019/ukojak/config/svcomp-Reach-32bit-Kojak_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_7df3f120-4f4d-45fc-be71-7f16a652acef/bin-2019/ukojak --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 Kojak --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fab453ece5fcff1538ea80c83122b1ca9f5a0f1e ........................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 11:04:09,317 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 11:04:09,318 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 11:04:09,325 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 11:04:09,325 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 11:04:09,325 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 11:04:09,326 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 11:04:09,327 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 11:04:09,328 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 11:04:09,329 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 11:04:09,330 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 11:04:09,330 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 11:04:09,331 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 11:04:09,331 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 11:04:09,332 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 11:04:09,333 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 11:04:09,333 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 11:04:09,334 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 11:04:09,336 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 11:04:09,337 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 11:04:09,338 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 11:04:09,338 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 11:04:09,340 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 11:04:09,340 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 11:04:09,340 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 11:04:09,341 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 11:04:09,341 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 11:04:09,342 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 11:04:09,342 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 11:04:09,343 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 11:04:09,343 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 11:04:09,344 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 11:04:09,344 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 11:04:09,344 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 11:04:09,344 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 11:04:09,345 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 11:04:09,345 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_7df3f120-4f4d-45fc-be71-7f16a652acef/bin-2019/ukojak/config/svcomp-Reach-32bit-Kojak_Default.epf [2018-11-18 11:04:09,355 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 11:04:09,355 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 11:04:09,355 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 11:04:09,355 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-18 11:04:09,356 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 11:04:09,356 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 11:04:09,356 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 11:04:09,356 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 11:04:09,357 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 11:04:09,357 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 11:04:09,357 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 11:04:09,357 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 11:04:09,357 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 11:04:09,357 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 11:04:09,357 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 11:04:09,357 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 11:04:09,358 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 11:04:09,358 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 11:04:09,358 INFO L131 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2018-11-18 11:04:09,358 INFO L133 SettingsManager]: * Timeout in seconds=1000000 [2018-11-18 11:04:09,358 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 11:04:09,358 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 11:04:09,358 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2018-11-18 11:04:09,358 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 11:04:09,359 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 11:04:09,359 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 11:04:09,359 INFO L133 SettingsManager]: * Trace refinement strategy=PENGUIN [2018-11-18 11:04:09,359 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 11:04:09,359 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 11:04:09,359 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_7df3f120-4f4d-45fc-be71-7f16a652acef/bin-2019/ukojak 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 -> Kojak 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 -> fab453ece5fcff1538ea80c83122b1ca9f5a0f1e [2018-11-18 11:04:09,382 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 11:04:09,391 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 11:04:09,393 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 11:04:09,394 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 11:04:09,394 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 11:04:09,394 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_7df3f120-4f4d-45fc-be71-7f16a652acef/bin-2019/ukojak/../../sv-benchmarks/c/product-lines/minepump_spec5_product20_true-unreach-call_false-termination.cil.c [2018-11-18 11:04:09,428 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_7df3f120-4f4d-45fc-be71-7f16a652acef/bin-2019/ukojak/data/b1936cfdb/172dd363fa5c4d9f8871ec0e58d6ddd5/FLAGb5040377d [2018-11-18 11:04:09,867 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 11:04:09,868 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_7df3f120-4f4d-45fc-be71-7f16a652acef/sv-benchmarks/c/product-lines/minepump_spec5_product20_true-unreach-call_false-termination.cil.c [2018-11-18 11:04:09,878 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_7df3f120-4f4d-45fc-be71-7f16a652acef/bin-2019/ukojak/data/b1936cfdb/172dd363fa5c4d9f8871ec0e58d6ddd5/FLAGb5040377d [2018-11-18 11:04:09,888 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_7df3f120-4f4d-45fc-be71-7f16a652acef/bin-2019/ukojak/data/b1936cfdb/172dd363fa5c4d9f8871ec0e58d6ddd5 [2018-11-18 11:04:09,891 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 11:04:09,891 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 11:04:09,892 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 11:04:09,892 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 11:04:09,895 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 11:04:09,895 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 11:04:09" (1/1) ... [2018-11-18 11:04:09,897 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ae989df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:04:09, skipping insertion in model container [2018-11-18 11:04:09,897 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 11:04:09" (1/1) ... [2018-11-18 11:04:09,904 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 11:04:09,934 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 11:04:10,129 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 11:04:10,137 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 11:04:10,230 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 11:04:10,251 INFO L195 MainTranslator]: Completed translation [2018-11-18 11:04:10,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:04:10 WrapperNode [2018-11-18 11:04:10,252 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 11:04:10,253 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 11:04:10,253 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 11:04:10,253 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 11:04:10,258 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:04:10" (1/1) ... [2018-11-18 11:04:10,269 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:04:10" (1/1) ... [2018-11-18 11:04:10,287 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 11:04:10,288 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 11:04:10,288 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 11:04:10,288 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 11:04:10,294 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:04:10" (1/1) ... [2018-11-18 11:04:10,294 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:04:10" (1/1) ... [2018-11-18 11:04:10,296 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:04:10" (1/1) ... [2018-11-18 11:04:10,296 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:04:10" (1/1) ... [2018-11-18 11:04:10,299 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:04:10" (1/1) ... [2018-11-18 11:04:10,304 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:04:10" (1/1) ... [2018-11-18 11:04:10,305 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:04:10" (1/1) ... [2018-11-18 11:04:10,308 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 11:04:10,309 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 11:04:10,309 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 11:04:10,309 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 11:04:10,310 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:04:10" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7df3f120-4f4d-45fc-be71-7f16a652acef/bin-2019/ukojak/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (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:10000 [2018-11-18 11:04:10,355 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-18 11:04:10,355 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2018-11-18 11:04:10,355 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2018-11-18 11:04:10,356 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2018-11-18 11:04:10,356 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2018-11-18 11:04:10,356 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2018-11-18 11:04:10,356 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2018-11-18 11:04:10,356 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2018-11-18 11:04:10,356 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2018-11-18 11:04:10,356 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2018-11-18 11:04:10,356 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2018-11-18 11:04:10,356 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2018-11-18 11:04:10,356 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2018-11-18 11:04:10,357 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2018-11-18 11:04:10,357 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2018-11-18 11:04:10,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 11:04:10,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 11:04:11,066 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 11:04:11,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 11:04:11 BoogieIcfgContainer [2018-11-18 11:04:11,066 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 11:04:11,066 INFO L113 PluginConnector]: ------------------------CodeCheck---------------------------- [2018-11-18 11:04:11,066 INFO L271 PluginConnector]: Initializing CodeCheck... [2018-11-18 11:04:11,073 INFO L276 PluginConnector]: CodeCheck initialized [2018-11-18 11:04:11,073 INFO L185 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 11:04:11" (1/1) ... [2018-11-18 11:04:11,080 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:04:11,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-11-18 11:04:11,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 61 states and 83 transitions. [2018-11-18 11:04:11,111 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 83 transitions. [2018-11-18 11:04:11,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-11-18 11:04:11,116 INFO L427 CodeCheckObserver]: Error Path is FOUND. [2018-11-18 11:04:11,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:04:11,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 11:04:11,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-11-18 11:04:11,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 61 states and 80 transitions. [2018-11-18 11:04:11,281 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2018-11-18 11:04:11,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-11-18 11:04:11,282 INFO L427 CodeCheckObserver]: Error Path is FOUND. [2018-11-18 11:04:11,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:04:11,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 11:04:11,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-11-18 11:04:11,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 64 states and 84 transitions. [2018-11-18 11:04:11,405 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2018-11-18 11:04:11,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-18 11:04:11,406 INFO L427 CodeCheckObserver]: Error Path is FOUND. [2018-11-18 11:04:11,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:04:11,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 11:04:11,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-11-18 11:04:11,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 69 states and 95 transitions. [2018-11-18 11:04:11,526 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 95 transitions. [2018-11-18 11:04:11,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-18 11:04:11,527 INFO L427 CodeCheckObserver]: Error Path is FOUND. [2018-11-18 11:04:11,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:04:11,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 11:04:11,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-11-18 11:04:11,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 78 states and 110 transitions. [2018-11-18 11:04:11,664 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 110 transitions. [2018-11-18 11:04:11,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-18 11:04:11,665 INFO L427 CodeCheckObserver]: Error Path is FOUND. [2018-11-18 11:04:11,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:04:11,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 11:04:11,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-11-18 11:04:11,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 84 states and 122 transitions. [2018-11-18 11:04:11,803 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 122 transitions. [2018-11-18 11:04:11,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-18 11:04:11,805 INFO L427 CodeCheckObserver]: Error Path is FOUND. [2018-11-18 11:04:11,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:04:11,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 11:04:11,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-11-18 11:04:11,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 84 states and 122 transitions. [2018-11-18 11:04:11,843 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 122 transitions. [2018-11-18 11:04:11,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-11-18 11:04:11,844 INFO L427 CodeCheckObserver]: Error Path is FOUND. [2018-11-18 11:04:11,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:04:11,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 11:04:11,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-11-18 11:04:11,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 85 states and 123 transitions. [2018-11-18 11:04:11,881 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 123 transitions. [2018-11-18 11:04:11,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-18 11:04:11,882 INFO L427 CodeCheckObserver]: Error Path is FOUND. [2018-11-18 11:04:11,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:04:11,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 11:04:11,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-11-18 11:04:11,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 85 states and 123 transitions. [2018-11-18 11:04:11,914 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 123 transitions. [2018-11-18 11:04:11,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-18 11:04:11,916 INFO L427 CodeCheckObserver]: Error Path is FOUND. [2018-11-18 11:04:11,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:04:12,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 11:04:12,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-11-18 11:04:12,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 91 states and 130 transitions. [2018-11-18 11:04:12,531 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 130 transitions. [2018-11-18 11:04:12,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-11-18 11:04:12,533 INFO L427 CodeCheckObserver]: Error Path is FOUND. [2018-11-18 11:04:12,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:04:12,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 11:04:12,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-11-18 11:04:12,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 96 states and 140 transitions. [2018-11-18 11:04:12,895 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 140 transitions. [2018-11-18 11:04:12,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-11-18 11:04:12,896 INFO L427 CodeCheckObserver]: Error Path is FOUND. [2018-11-18 11:04:12,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:04:12,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 11:04:12,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-11-18 11:04:12,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 96 states and 139 transitions. [2018-11-18 11:04:12,932 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 139 transitions. [2018-11-18 11:04:12,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-11-18 11:04:12,933 INFO L427 CodeCheckObserver]: Error Path is FOUND. [2018-11-18 11:04:12,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:04:12,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 11:04:13,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-11-18 11:04:13,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 93 states and 136 transitions. [2018-11-18 11:04:13,542 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 136 transitions. [2018-11-18 11:04:13,542 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 11:04:13,542 WARN L424 CodeCheckObserver]: This Program is SAFE, Check terminated with 13 iterations. [2018-11-18 11:04:13,548 INFO L775 CodeCheckObserver]: All specifications hold 1 specifications checked. All of them hold [2018-11-18 11:04:13,617 INFO L579 CodeCheckObserver]: Invariant with dag size 1 [2018-11-18 11:04:13,619 INFO L579 CodeCheckObserver]: Invariant with dag size 1 [2018-11-18 11:04:13,619 INFO L579 CodeCheckObserver]: Invariant with dag size 1 [2018-11-18 11:04:13,619 INFO L579 CodeCheckObserver]: Invariant with dag size 1 [2018-11-18 11:04:13,619 INFO L579 CodeCheckObserver]: Invariant with dag size 1 [2018-11-18 11:04:13,619 INFO L579 CodeCheckObserver]: Invariant with dag size 1 [2018-11-18 11:04:13,619 INFO L579 CodeCheckObserver]: Invariant with dag size 1 [2018-11-18 11:04:13,619 INFO L579 CodeCheckObserver]: Invariant with dag size 9 [2018-11-18 11:04:13,622 INFO L579 CodeCheckObserver]: Invariant with dag size 1 [2018-11-18 11:04:13,622 INFO L579 CodeCheckObserver]: Invariant with dag size 3 [2018-11-18 11:04:13,623 INFO L579 CodeCheckObserver]: Invariant with dag size 1 [2018-11-18 11:04:13,623 INFO L579 CodeCheckObserver]: Invariant with dag size 1 [2018-11-18 11:04:13,623 INFO L579 CodeCheckObserver]: Invariant with dag size 1 [2018-11-18 11:04:13,624 INFO L579 CodeCheckObserver]: Invariant with dag size 1 [2018-11-18 11:04:13,624 INFO L579 CodeCheckObserver]: Invariant with dag size 1 [2018-11-18 11:04:13,624 INFO L579 CodeCheckObserver]: Invariant with dag size 3 [2018-11-18 11:04:13,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck CFG 18.11 11:04:13 ImpRootNode [2018-11-18 11:04:13,625 INFO L132 PluginConnector]: ------------------------ END CodeCheck---------------------------- [2018-11-18 11:04:13,625 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 11:04:13,625 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 11:04:13,625 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 11:04:13,626 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 11:04:11" (3/4) ... [2018-11-18 11:04:13,629 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 11:04:13,632 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure deactivatePump [2018-11-18 11:04:13,632 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure processEnvironment__wrappee__base [2018-11-18 11:04:13,633 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure changeMethaneLevel [2018-11-18 11:04:13,633 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure timeShift [2018-11-18 11:04:13,633 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure cleanup [2018-11-18 11:04:13,633 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure waterRise [2018-11-18 11:04:13,633 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure isPumpRunning [2018-11-18 11:04:13,639 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 35 nodes and edges [2018-11-18 11:04:13,639 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2018-11-18 11:04:13,640 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2018-11-18 11:04:13,699 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_7df3f120-4f4d-45fc-be71-7f16a652acef/bin-2019/ukojak/witness.graphml [2018-11-18 11:04:13,699 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 11:04:13,700 INFO L168 Benchmark]: Toolchain (without parser) took 3808.87 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 169.9 MB). Free memory was 956.4 MB in the beginning and 1.0 GB in the end (delta: -83.4 MB). Peak memory consumption was 86.5 MB. Max. memory is 11.5 GB. [2018-11-18 11:04:13,701 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 11:04:13,701 INFO L168 Benchmark]: CACSL2BoogieTranslator took 360.15 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 118.0 MB). Free memory was 956.4 MB in the beginning and 1.1 GB in the end (delta: -147.6 MB). Peak memory consumption was 31.8 MB. Max. memory is 11.5 GB. [2018-11-18 11:04:13,701 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.97 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 11:04:13,702 INFO L168 Benchmark]: Boogie Preprocessor took 20.65 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 11:04:13,702 INFO L168 Benchmark]: RCFGBuilder took 757.62 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 71.9 MB). Peak memory consumption was 71.9 MB. Max. memory is 11.5 GB. [2018-11-18 11:04:13,702 INFO L168 Benchmark]: CodeCheck took 2558.28 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 51.9 MB). Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: -18.0 MB). Peak memory consumption was 33.9 MB. Max. memory is 11.5 GB. [2018-11-18 11:04:13,702 INFO L168 Benchmark]: Witness Printer took 74.24 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 5.0 MB). Peak memory consumption was 5.0 MB. Max. memory is 11.5 GB. [2018-11-18 11:04:13,704 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck: - StatisticsResult: Ultimate CodeCheck benchmark data CFG has 8 procedures, 89 locations, 1 error locations. SAFE Result, 2.4s OverallTime, 13 OverallIterations, 0 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 109188 SDtfs, 26406 SDslu, 42918 SDs, 0 SdLazy, 29068 SolverSat, 10336 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2666 GetRequests, 2579 SyntacticMatches, 7 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1711 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, traceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 348 NumberOfCodeBlocks, 348 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 336 ConstructedInterpolants, 0 QuantifiedInterpolants, 16061 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 11 PerfectInterpolantSequences, 23/24 InterpolantCoveringCapability, 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: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - PositiveResult [Line: 595]: 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: 612]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 742]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: -1]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 523]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 702]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 790]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 811]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 815]: Loop Invariant Derived loop invariant: !(!(0 == pumpRunning) && !(pumpRunning == switchedOnBeforeTS)) - InvariantResult [Line: 711]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 686]: Loop Invariant Derived loop invariant: systemActive == 1 - InvariantResult [Line: 931]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 712]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 686]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 602]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 595]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 518]: Loop Invariant Derived loop invariant: pumpRunning == aux-isPumpRunning()-aux * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 360.15 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 118.0 MB). Free memory was 956.4 MB in the beginning and 1.1 GB in the end (delta: -147.6 MB). Peak memory consumption was 31.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 34.97 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 20.65 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 757.62 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 71.9 MB). Peak memory consumption was 71.9 MB. Max. memory is 11.5 GB. * CodeCheck took 2558.28 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 51.9 MB). Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: -18.0 MB). Peak memory consumption was 33.9 MB. Max. memory is 11.5 GB. * Witness Printer took 74.24 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 5.0 MB). Peak memory consumption was 5.0 MB. Max. memory is 11.5 GB. RESULT: Ultimate proved your program to be correct! Received shutdown request...