./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive-simple/sum_non.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_c21ca08f-8642-4f40-8f5b-8070ff95d93c/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_c21ca08f-8642-4f40-8f5b-8070ff95d93c/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c21ca08f-8642-4f40-8f5b-8070ff95d93c/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c21ca08f-8642-4f40-8f5b-8070ff95d93c/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_non.c -s /tmp/vcloud-vcloud-master/worker/run_dir_c21ca08f-8642-4f40-8f5b-8070ff95d93c/bin/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c21ca08f-8642-4f40-8f5b-8070ff95d93c/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d40444e4cd2a33c7365a8211a19737bb4f6f43ea ................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(OVERFLOW) --- Real Ultimate output --- This is Ultimate 0.1.24-6b5699a [2019-11-26 02:05:37,995 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:05:37,997 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:05:38,008 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:05:38,009 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:05:38,010 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:05:38,012 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:05:38,020 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:05:38,022 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:05:38,024 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:05:38,026 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:05:38,027 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:05:38,027 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:05:38,030 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:05:38,031 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:05:38,032 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:05:38,033 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:05:38,036 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:05:38,038 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:05:38,041 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:05:38,045 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:05:38,047 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:05:38,049 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:05:38,050 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:05:38,052 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:05:38,052 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:05:38,053 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:05:38,054 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:05:38,055 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:05:38,056 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:05:38,056 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:05:38,057 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:05:38,057 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:05:38,058 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:05:38,059 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:05:38,060 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:05:38,060 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:05:38,060 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:05:38,061 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:05:38,062 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:05:38,063 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:05:38,064 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c21ca08f-8642-4f40-8f5b-8070ff95d93c/bin/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf [2019-11-26 02:05:38,088 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:05:38,098 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:05:38,098 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:05:38,099 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:05:38,099 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:05:38,099 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:05:38,099 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-26 02:05:38,100 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:05:38,100 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:05:38,100 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-26 02:05:38,100 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-26 02:05:38,100 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:05:38,101 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-26 02:05:38,101 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-26 02:05:38,102 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-26 02:05:38,102 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:05:38,103 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:05:38,103 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-26 02:05:38,103 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:05:38,104 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:05:38,104 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:05:38,104 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:05:38,104 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:05:38,104 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:05:38,105 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2019-11-26 02:05:38,105 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:05:38,105 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:05:38,105 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:05:38,106 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:05:38,106 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:05:38,106 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:05:38,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:05:38,107 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:05:38,107 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:05:38,107 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:05:38,107 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-26 02:05:38,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-26 02:05:38,108 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:05:38,108 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:05:38,108 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_c21ca08f-8642-4f40-8f5b-8070ff95d93c/bin/utaipan 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 -> Taipan 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 -> d40444e4cd2a33c7365a8211a19737bb4f6f43ea [2019-11-26 02:05:38,245 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:05:38,254 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:05:38,257 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:05:38,258 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:05:38,259 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:05:38,259 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c21ca08f-8642-4f40-8f5b-8070ff95d93c/bin/utaipan/../../sv-benchmarks/c/recursive-simple/sum_non.c [2019-11-26 02:05:38,303 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c21ca08f-8642-4f40-8f5b-8070ff95d93c/bin/utaipan/data/eb41660c5/1efff87297504c899becec8fbf36deaa/FLAG794641771 [2019-11-26 02:05:38,700 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:05:38,700 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c21ca08f-8642-4f40-8f5b-8070ff95d93c/sv-benchmarks/c/recursive-simple/sum_non.c [2019-11-26 02:05:38,705 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c21ca08f-8642-4f40-8f5b-8070ff95d93c/bin/utaipan/data/eb41660c5/1efff87297504c899becec8fbf36deaa/FLAG794641771 [2019-11-26 02:05:38,716 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c21ca08f-8642-4f40-8f5b-8070ff95d93c/bin/utaipan/data/eb41660c5/1efff87297504c899becec8fbf36deaa [2019-11-26 02:05:38,719 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:05:38,720 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:05:38,721 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:05:38,721 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:05:38,724 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:05:38,724 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:05:38" (1/1) ... [2019-11-26 02:05:38,727 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29ecc448 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:05:38, skipping insertion in model container [2019-11-26 02:05:38,727 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:05:38" (1/1) ... [2019-11-26 02:05:38,732 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:05:38,744 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:05:38,867 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:05:38,870 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:05:38,944 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:05:38,954 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:05:38,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:05:38 WrapperNode [2019-11-26 02:05:38,955 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:05:38,955 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:05:38,956 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:05:38,956 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:05:38,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:05:38" (1/1) ... [2019-11-26 02:05:38,967 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:05:38" (1/1) ... [2019-11-26 02:05:38,982 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:05:38,982 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:05:38,982 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:05:38,982 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:05:38,990 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:05:38" (1/1) ... [2019-11-26 02:05:38,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:05:38" (1/1) ... [2019-11-26 02:05:38,991 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:05:38" (1/1) ... [2019-11-26 02:05:38,991 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:05:38" (1/1) ... [2019-11-26 02:05:38,993 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:05:38" (1/1) ... [2019-11-26 02:05:38,995 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:05:38" (1/1) ... [2019-11-26 02:05:38,995 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:05:38" (1/1) ... [2019-11-26 02:05:38,997 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:05:38,997 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:05:38,997 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:05:38,997 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:05:38,998 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:05:38" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c21ca08f-8642-4f40-8f5b-8070ff95d93c/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:05:39,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:05:39,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:05:39,076 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2019-11-26 02:05:39,077 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2019-11-26 02:05:39,400 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:05:39,400 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-26 02:05:39,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:05:39 BoogieIcfgContainer [2019-11-26 02:05:39,401 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:05:39,402 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:05:39,402 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:05:39,405 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:05:39,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:05:38" (1/3) ... [2019-11-26 02:05:39,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13db13bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:05:39, skipping insertion in model container [2019-11-26 02:05:39,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:05:38" (2/3) ... [2019-11-26 02:05:39,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13db13bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:05:39, skipping insertion in model container [2019-11-26 02:05:39,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:05:39" (3/3) ... [2019-11-26 02:05:39,408 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_non.c [2019-11-26 02:05:39,414 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:05:39,419 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2019-11-26 02:05:39,426 INFO L249 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2019-11-26 02:05:39,443 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:05:39,444 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:05:39,444 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:05:39,444 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:05:39,444 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:05:39,444 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:05:39,444 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:05:39,445 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:05:39,458 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-11-26 02:05:39,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-26 02:05:39,462 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:05:39,463 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-26 02:05:39,463 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, sumErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, sumErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, sumErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, sumErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, sumErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, sumErr5ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-26 02:05:39,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:05:39,469 INFO L82 PathProgramCache]: Analyzing trace with hash 30702701, now seen corresponding path program 1 times [2019-11-26 02:05:39,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:05:39,478 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198376590] [2019-11-26 02:05:39,478 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:05:39,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:05:39,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:05:39,616 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198376590] [2019-11-26 02:05:39,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:05:39,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-26 02:05:39,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863543903] [2019-11-26 02:05:39,621 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-26 02:05:39,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:05:39,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-26 02:05:39,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-26 02:05:39,632 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 6 states. [2019-11-26 02:05:39,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:05:39,880 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2019-11-26 02:05:39,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-26 02:05:39,882 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2019-11-26 02:05:39,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:05:39,891 INFO L225 Difference]: With dead ends: 48 [2019-11-26 02:05:39,891 INFO L226 Difference]: Without dead ends: 46 [2019-11-26 02:05:39,894 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-26 02:05:39,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-26 02:05:39,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2019-11-26 02:05:39,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-26 02:05:39,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2019-11-26 02:05:39,942 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 5 [2019-11-26 02:05:39,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:05:39,943 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2019-11-26 02:05:39,943 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-26 02:05:39,943 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2019-11-26 02:05:39,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-26 02:05:39,945 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:05:39,945 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-26 02:05:39,945 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, sumErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, sumErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, sumErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, sumErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, sumErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, sumErr5ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-26 02:05:39,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:05:39,946 INFO L82 PathProgramCache]: Analyzing trace with hash 30702861, now seen corresponding path program 1 times [2019-11-26 02:05:39,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:05:39,947 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447422664] [2019-11-26 02:05:39,947 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:05:39,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:05:39,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:05:39,985 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447422664] [2019-11-26 02:05:39,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:05:39,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-26 02:05:39,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450733484] [2019-11-26 02:05:39,987 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 02:05:39,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:05:39,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 02:05:39,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:05:39,988 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand 5 states. [2019-11-26 02:05:40,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:05:40,046 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2019-11-26 02:05:40,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-26 02:05:40,047 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2019-11-26 02:05:40,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:05:40,048 INFO L225 Difference]: With dead ends: 37 [2019-11-26 02:05:40,048 INFO L226 Difference]: Without dead ends: 36 [2019-11-26 02:05:40,049 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-26 02:05:40,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-26 02:05:40,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-11-26 02:05:40,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-26 02:05:40,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2019-11-26 02:05:40,056 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 5 [2019-11-26 02:05:40,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:05:40,056 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2019-11-26 02:05:40,057 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 02:05:40,057 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2019-11-26 02:05:40,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-26 02:05:40,057 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:05:40,058 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-26 02:05:40,058 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, sumErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, sumErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, sumErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, sumErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, sumErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, sumErr5ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-26 02:05:40,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:05:40,058 INFO L82 PathProgramCache]: Analyzing trace with hash 951783786, now seen corresponding path program 1 times [2019-11-26 02:05:40,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:05:40,059 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774812050] [2019-11-26 02:05:40,059 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:05:40,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:05:40,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:05:40,089 INFO L174 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-11-26 02:05:40,089 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-26 02:05:40,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 02:05:40 BoogieIcfgContainer [2019-11-26 02:05:40,117 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-26 02:05:40,117 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-26 02:05:40,118 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-26 02:05:40,119 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-26 02:05:40,119 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:05:39" (3/4) ... [2019-11-26 02:05:40,121 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-26 02:05:40,156 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_c21ca08f-8642-4f40-8f5b-8070ff95d93c/bin/utaipan/witness.graphml [2019-11-26 02:05:40,156 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-26 02:05:40,158 INFO L168 Benchmark]: Toolchain (without parser) took 1437.54 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 162.5 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -135.0 MB). Peak memory consumption was 27.6 MB. Max. memory is 11.5 GB. [2019-11-26 02:05:40,159 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:05:40,159 INFO L168 Benchmark]: CACSL2BoogieTranslator took 234.41 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 162.5 MB). Free memory was 944.7 MB in the beginning and 1.2 GB in the end (delta: -212.3 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-11-26 02:05:40,160 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.61 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:05:40,160 INFO L168 Benchmark]: Boogie Preprocessor took 14.56 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:05:40,161 INFO L168 Benchmark]: RCFGBuilder took 404.46 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 27.1 MB). Peak memory consumption was 27.1 MB. Max. memory is 11.5 GB. [2019-11-26 02:05:40,161 INFO L168 Benchmark]: TraceAbstraction took 714.63 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 50.2 MB). Peak memory consumption was 50.2 MB. Max. memory is 11.5 GB. [2019-11-26 02:05:40,162 INFO L168 Benchmark]: Witness Printer took 39.07 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:05:40,169 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 234.41 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 162.5 MB). Free memory was 944.7 MB in the beginning and 1.2 GB in the end (delta: -212.3 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 26.61 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 14.56 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 404.46 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 27.1 MB). Peak memory consumption was 27.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 714.63 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 50.2 MB). Peak memory consumption was 50.2 MB. Max. memory is 11.5 GB. * Witness Printer took 39.07 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: integer overflow possible integer overflow possible We found a FailurePath: [L13] int a = __VERIFIER_nondet_int(); [L14] int b = __VERIFIER_nondet_int(); [L15] CALL sum(a, b) VAL [\old(m)=-2147483648, \old(n)=-1] [L5] COND TRUE n <= 0 VAL [\old(m)=-2147483648, \old(n)=-1, m=-2147483648, n=-1] [L6] m + n VAL [\old(m)=-2147483648, \old(n)=-1, m=-2147483648, n=-1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 26 locations, 8 error locations. Result: UNSAFE, OverallTime: 0.6s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 27 SDtfs, 83 SDslu, 58 SDs, 0 SdLazy, 103 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=1, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 9 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 16 NumberOfCodeBlocks, 16 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 8 ConstructedInterpolants, 0 QuantifiedInterpolants, 104 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...