./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/LeikeHeizmann-TACAS2014-Ex1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 69874e26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_53b39a6b-5fe3-4651-89f6-2842dbb4d928/bin/ukojak/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_53b39a6b-5fe3-4651-89f6-2842dbb4d928/bin/ukojak/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_53b39a6b-5fe3-4651-89f6-2842dbb4d928/bin/ukojak/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_53b39a6b-5fe3-4651-89f6-2842dbb4d928/bin/ukojak/config/KojakReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/LeikeHeizmann-TACAS2014-Ex1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_53b39a6b-5fe3-4651-89f6-2842dbb4d928/bin/ukojak/config/svcomp-Overflow-64bit-Kojak_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_53b39a6b-5fe3-4651-89f6-2842dbb4d928/bin/ukojak --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Kojak --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash ebb74e337af9534aacfcb2a7a413bdbed21e04b2 ..................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-69874e2 [2020-12-01 18:18:37,248 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-01 18:18:37,252 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-01 18:18:37,331 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-01 18:18:37,332 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-01 18:18:37,339 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-01 18:18:37,343 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-01 18:18:37,352 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-01 18:18:37,356 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-01 18:18:37,365 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-01 18:18:37,367 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-01 18:18:37,370 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-01 18:18:37,371 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-01 18:18:37,376 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-01 18:18:37,378 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-01 18:18:37,381 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-01 18:18:37,384 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-01 18:18:37,389 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-01 18:18:37,394 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-01 18:18:37,404 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-01 18:18:37,407 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-01 18:18:37,409 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-01 18:18:37,412 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-01 18:18:37,414 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-01 18:18:37,426 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-01 18:18:37,427 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-01 18:18:37,427 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-01 18:18:37,430 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-01 18:18:37,431 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-01 18:18:37,433 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-01 18:18:37,434 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-01 18:18:37,436 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-01 18:18:37,439 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-01 18:18:37,443 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-01 18:18:37,448 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-01 18:18:37,449 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-01 18:18:37,450 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-01 18:18:37,450 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-01 18:18:37,450 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-01 18:18:37,451 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-01 18:18:37,452 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-01 18:18:37,453 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_53b39a6b-5fe3-4651-89f6-2842dbb4d928/bin/ukojak/config/svcomp-Overflow-64bit-Kojak_Default.epf [2020-12-01 18:18:37,486 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-01 18:18:37,487 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-01 18:18:37,488 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-01 18:18:37,488 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ALWAYS [2020-12-01 18:18:37,489 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-01 18:18:37,490 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-01 18:18:37,490 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-01 18:18:37,491 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-01 18:18:37,491 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-01 18:18:37,491 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-01 18:18:37,492 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-01 18:18:37,492 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-01 18:18:37,492 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-01 18:18:37,493 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-12-01 18:18:37,493 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-01 18:18:37,493 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-01 18:18:37,494 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-01 18:18:37,494 INFO L136 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2020-12-01 18:18:37,494 INFO L138 SettingsManager]: * Timeout in seconds=1000000 [2020-12-01 18:18:37,495 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-01 18:18:37,495 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-01 18:18:37,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2020-12-01 18:18:37,496 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-01 18:18:37,496 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-01 18:18:37,496 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-01 18:18:37,497 INFO L138 SettingsManager]: * Trace refinement strategy=PENGUIN [2020-12-01 18:18:37,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-01 18:18:37,497 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-01 18:18:37,498 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_53b39a6b-5fe3-4651-89f6-2842dbb4d928/bin/ukojak/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_53b39a6b-5fe3-4651-89f6-2842dbb4d928/bin/ukojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Kojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ebb74e337af9534aacfcb2a7a413bdbed21e04b2 [2020-12-01 18:18:37,813 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-01 18:18:37,847 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-01 18:18:37,851 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-01 18:18:37,854 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-01 18:18:37,855 INFO L275 PluginConnector]: CDTParser initialized [2020-12-01 18:18:37,857 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_53b39a6b-5fe3-4651-89f6-2842dbb4d928/bin/ukojak/../../sv-benchmarks/c/termination-crafted-lit/LeikeHeizmann-TACAS2014-Ex1.c [2020-12-01 18:18:37,985 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_53b39a6b-5fe3-4651-89f6-2842dbb4d928/bin/ukojak/data/f30a6094f/6c58a5ee085e4ecebf92d36d2c509e32/FLAGc5ba02855 [2020-12-01 18:18:38,598 INFO L306 CDTParser]: Found 1 translation units. [2020-12-01 18:18:38,598 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_53b39a6b-5fe3-4651-89f6-2842dbb4d928/sv-benchmarks/c/termination-crafted-lit/LeikeHeizmann-TACAS2014-Ex1.c [2020-12-01 18:18:38,604 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_53b39a6b-5fe3-4651-89f6-2842dbb4d928/bin/ukojak/data/f30a6094f/6c58a5ee085e4ecebf92d36d2c509e32/FLAGc5ba02855 [2020-12-01 18:18:38,979 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_53b39a6b-5fe3-4651-89f6-2842dbb4d928/bin/ukojak/data/f30a6094f/6c58a5ee085e4ecebf92d36d2c509e32 [2020-12-01 18:18:38,982 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-01 18:18:38,984 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-01 18:18:38,987 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-01 18:18:38,987 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-01 18:18:38,991 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-01 18:18:38,993 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 06:18:38" (1/1) ... [2020-12-01 18:18:38,995 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9671dd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 06:18:38, skipping insertion in model container [2020-12-01 18:18:38,995 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 06:18:38" (1/1) ... [2020-12-01 18:18:39,010 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-01 18:18:39,031 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-01 18:18:39,188 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 18:18:39,193 INFO L203 MainTranslator]: Completed pre-run [2020-12-01 18:18:39,225 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 18:18:39,255 INFO L208 MainTranslator]: Completed translation [2020-12-01 18:18:39,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 06:18:39 WrapperNode [2020-12-01 18:18:39,257 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-01 18:18:39,259 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-01 18:18:39,260 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-01 18:18:39,260 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-01 18:18:39,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 06:18:39" (1/1) ... [2020-12-01 18:18:39,281 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 06:18:39" (1/1) ... [2020-12-01 18:18:39,304 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-01 18:18:39,306 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-01 18:18:39,306 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-01 18:18:39,306 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-01 18:18:39,317 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 06:18:39" (1/1) ... [2020-12-01 18:18:39,318 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 06:18:39" (1/1) ... [2020-12-01 18:18:39,319 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 06:18:39" (1/1) ... [2020-12-01 18:18:39,320 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 06:18:39" (1/1) ... [2020-12-01 18:18:39,322 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 06:18:39" (1/1) ... [2020-12-01 18:18:39,327 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 06:18:39" (1/1) ... [2020-12-01 18:18:39,328 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 06:18:39" (1/1) ... [2020-12-01 18:18:39,330 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-01 18:18:39,332 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-01 18:18:39,332 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-01 18:18:39,332 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-01 18:18:39,334 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 06:18:39" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_53b39a6b-5fe3-4651-89f6-2842dbb4d928/bin/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 [2020-12-01 18:18:39,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-01 18:18:39,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-01 18:18:39,668 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-01 18:18:39,669 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-12-01 18:18:39,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 06:18:39 BoogieIcfgContainer [2020-12-01 18:18:39,673 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-01 18:18:39,674 INFO L113 PluginConnector]: ------------------------CodeCheck---------------------------- [2020-12-01 18:18:39,674 INFO L271 PluginConnector]: Initializing CodeCheck... [2020-12-01 18:18:39,687 INFO L275 PluginConnector]: CodeCheck initialized [2020-12-01 18:18:39,688 INFO L185 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 06:18:39" (1/1) ... [2020-12-01 18:18:39,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 18:18:39,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 18:18:39,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 20 states and 21 transitions. [2020-12-01 18:18:39,763 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-12-01 18:18:39,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-01 18:18:39,766 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 18:18:39,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 18:18:39,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 18:18:40,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 18:18:40,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 23 states and 27 transitions. [2020-12-01 18:18:40,081 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-12-01 18:18:40,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-01 18:18:40,103 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 18:18:40,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 18:18:40,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 18:18:40,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 18:18:40,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 24 states and 29 transitions. [2020-12-01 18:18:40,200 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-12-01 18:18:40,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-01 18:18:40,201 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 18:18:40,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 18:18:40,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 18:18:40,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 18:18:40,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 28 states and 39 transitions. [2020-12-01 18:18:40,649 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 39 transitions. [2020-12-01 18:18:40,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-01 18:18:40,650 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 18:18:40,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 18:18:40,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 18:18:41,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 18:18:41,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 32 states and 49 transitions. [2020-12-01 18:18:41,269 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 49 transitions. [2020-12-01 18:18:41,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-01 18:18:41,270 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 18:18:41,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 18:18:41,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 18:18:41,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 18:18:41,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 31 states and 48 transitions. [2020-12-01 18:18:41,361 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 48 transitions. [2020-12-01 18:18:41,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-01 18:18:41,365 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 18:18:41,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 18:18:41,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 18:18:41,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 18:18:41,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 30 states and 47 transitions. [2020-12-01 18:18:41,603 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 47 transitions. [2020-12-01 18:18:41,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-01 18:18:41,604 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 18:18:41,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 18:18:41,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 18:18:41,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 18:18:41,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 32 states and 48 transitions. [2020-12-01 18:18:41,663 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 48 transitions. [2020-12-01 18:18:41,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-01 18:18:41,664 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 18:18:41,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 18:18:41,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 18:18:41,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 18:18:41,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 34 states and 52 transitions. [2020-12-01 18:18:41,719 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 52 transitions. [2020-12-01 18:18:41,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-01 18:18:41,720 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 18:18:41,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 18:18:41,824 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 18:18:42,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 18:18:42,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 36 states and 55 transitions. [2020-12-01 18:18:42,527 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 55 transitions. [2020-12-01 18:18:42,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-01 18:18:42,528 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 18:18:42,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 18:18:42,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 18:18:43,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 18:18:43,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 41 states and 61 transitions. [2020-12-01 18:18:43,480 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 61 transitions. [2020-12-01 18:18:43,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-01 18:18:43,481 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 18:18:43,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 18:18:43,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 18:18:44,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 18:18:44,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 32 states and 47 transitions. [2020-12-01 18:18:44,287 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 47 transitions. [2020-12-01 18:18:44,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-01 18:18:44,288 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 18:18:44,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 18:18:44,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 18:18:44,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 18:18:44,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 30 states and 43 transitions. [2020-12-01 18:18:44,856 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2020-12-01 18:18:44,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-01 18:18:44,857 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 18:18:44,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 18:18:44,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 18:18:45,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 18:18:45,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 31 states and 45 transitions. [2020-12-01 18:18:45,085 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-12-01 18:18:45,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-01 18:18:45,086 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 18:18:45,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 18:18:45,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 18:18:45,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 18:18:45,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 31 states and 43 transitions. [2020-12-01 18:18:45,552 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2020-12-01 18:18:45,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-01 18:18:45,553 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 18:18:45,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 18:18:45,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 18:18:46,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 18:18:46,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 29 states and 39 transitions. [2020-12-01 18:18:46,375 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2020-12-01 18:18:46,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-01 18:18:46,376 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 18:18:46,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 18:18:46,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 18:18:46,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 18:18:46,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 14 states and 17 transitions. [2020-12-01 18:18:46,674 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2020-12-01 18:18:46,678 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-01 18:18:46,680 WARN L425 CodeCheckObserver]: This Program is SAFE, Check terminated with 17 iterations. [2020-12-01 18:18:46,690 INFO L765 CodeCheckObserver]: All specifications hold 8 specifications checked. All of them hold [2020-12-01 18:18:46,792 INFO L569 CodeCheckObserver]: Invariant with dag size 20 [2020-12-01 18:18:46,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck CFG 01.12 06:18:46 ImpRootNode [2020-12-01 18:18:46,818 INFO L132 PluginConnector]: ------------------------ END CodeCheck---------------------------- [2020-12-01 18:18:46,818 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-01 18:18:46,819 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-01 18:18:46,820 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-01 18:18:46,820 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 06:18:39" (3/4) ... [2020-12-01 18:18:46,824 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-01 18:18:46,836 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2020-12-01 18:18:46,845 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-12-01 18:18:46,845 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-01 18:18:46,925 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_53b39a6b-5fe3-4651-89f6-2842dbb4d928/bin/ukojak/witness.graphml [2020-12-01 18:18:46,927 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-01 18:18:46,929 INFO L168 Benchmark]: Toolchain (without parser) took 7943.66 ms. Allocated memory was 102.8 MB in the beginning and 130.0 MB in the end (delta: 27.3 MB). Free memory was 74.7 MB in the beginning and 88.3 MB in the end (delta: -13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 16.1 GB. [2020-12-01 18:18:46,931 INFO L168 Benchmark]: CDTParser took 0.49 ms. Allocated memory is still 102.8 MB. Free memory is still 59.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 18:18:46,935 INFO L168 Benchmark]: CACSL2BoogieTranslator took 271.42 ms. Allocated memory is still 102.8 MB. Free memory was 74.5 MB in the beginning and 79.5 MB in the end (delta: -5.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-01 18:18:46,937 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.60 ms. Allocated memory is still 102.8 MB. Free memory was 79.5 MB in the beginning and 78.1 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 18:18:46,937 INFO L168 Benchmark]: Boogie Preprocessor took 25.05 ms. Allocated memory is still 102.8 MB. Free memory was 78.1 MB in the beginning and 77.2 MB in the end (delta: 963.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 18:18:46,938 INFO L168 Benchmark]: RCFGBuilder took 341.61 ms. Allocated memory is still 102.8 MB. Free memory was 77.2 MB in the beginning and 65.9 MB in the end (delta: 11.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-01 18:18:46,939 INFO L168 Benchmark]: CodeCheck took 7143.86 ms. Allocated memory was 102.8 MB in the beginning and 130.0 MB in the end (delta: 27.3 MB). Free memory was 65.9 MB in the beginning and 90.4 MB in the end (delta: -24.6 MB). Peak memory consumption was 4.5 MB. Max. memory is 16.1 GB. [2020-12-01 18:18:46,939 INFO L168 Benchmark]: Witness Printer took 108.51 ms. Allocated memory is still 130.0 MB. Free memory was 90.4 MB in the beginning and 88.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 18:18:46,945 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck: - StatisticsResult: Ultimate CodeCheck benchmark data CFG has 1 procedures, 20 locations, 8 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.9s, OverallIterations: 17, TraceHistogramMax: 0, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 131072 SDtfs, 218434 SDslu, 0 SDs, 0 SdLazy, 1471688 SolverSat, 328550 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1293 GetRequests, 1114 SyntacticMatches, 49 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7469 ImplicationChecksByTransitivity, 5.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, traceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 129 NumberOfCodeBlocks, 129 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 113 ConstructedInterpolants, 0 QuantifiedInterpolants, 3609 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 16 InterpolantComputations, 10 PerfectInterpolantSequences, 4/26 InterpolantCoveringCapability, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - PositiveResult [Line: 21]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 19]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 21]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 21]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 21]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 19]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 19]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 19]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: ((q + y <= 2147483646 && 2147483647 < y) || (q <= y + 2147483646 && y + 2147483648 < 0)) || ((0 <= y + 2147483648 && q <= 2147483647) && y <= 2147483647) * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.49 ms. Allocated memory is still 102.8 MB. Free memory is still 59.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 271.42 ms. Allocated memory is still 102.8 MB. Free memory was 74.5 MB in the beginning and 79.5 MB in the end (delta: -5.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 45.60 ms. Allocated memory is still 102.8 MB. Free memory was 79.5 MB in the beginning and 78.1 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.05 ms. Allocated memory is still 102.8 MB. Free memory was 78.1 MB in the beginning and 77.2 MB in the end (delta: 963.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 341.61 ms. Allocated memory is still 102.8 MB. Free memory was 77.2 MB in the beginning and 65.9 MB in the end (delta: 11.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * CodeCheck took 7143.86 ms. Allocated memory was 102.8 MB in the beginning and 130.0 MB in the end (delta: 27.3 MB). Free memory was 65.9 MB in the beginning and 90.4 MB in the end (delta: -24.6 MB). Peak memory consumption was 4.5 MB. Max. memory is 16.1 GB. * Witness Printer took 108.51 ms. Allocated memory is still 130.0 MB. Free memory was 90.4 MB in the beginning and 88.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. RESULT: Ultimate proved your program to be correct! Received shutdown request...