./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/scopes5_false-valid-deref.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version aa418289 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_8239026d-569d-4054-923b-518601353f25/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_8239026d-569d-4054-923b-518601353f25/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_8239026d-569d-4054-923b-518601353f25/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_8239026d-569d-4054-923b-518601353f25/bin-2019/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/scopes5_false-valid-deref.c -s /tmp/vcloud-vcloud-master/worker/working_dir_8239026d-569d-4054-923b-518601353f25/bin-2019/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_8239026d-569d-4054-923b-518601353f25/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 767ec81abc1d53fd457a174594199b33ee40a3be .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.1.23-aa41828 [2018-11-23 09:01:19,470 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-23 09:01:19,471 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-23 09:01:19,478 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-23 09:01:19,479 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-23 09:01:19,479 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-23 09:01:19,480 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-23 09:01:19,481 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-23 09:01:19,482 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-23 09:01:19,483 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-23 09:01:19,484 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-23 09:01:19,484 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-23 09:01:19,484 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-23 09:01:19,485 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-23 09:01:19,486 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-23 09:01:19,486 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-23 09:01:19,487 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-23 09:01:19,488 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-23 09:01:19,490 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-23 09:01:19,491 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-23 09:01:19,492 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-23 09:01:19,492 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-23 09:01:19,494 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-23 09:01:19,494 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-23 09:01:19,494 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-23 09:01:19,495 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-23 09:01:19,496 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-23 09:01:19,496 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-23 09:01:19,497 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-23 09:01:19,498 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-23 09:01:19,498 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-23 09:01:19,498 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-23 09:01:19,498 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-23 09:01:19,499 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-23 09:01:19,499 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-23 09:01:19,500 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-23 09:01:19,500 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_8239026d-569d-4054-923b-518601353f25/bin-2019/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2018-11-23 09:01:19,510 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-23 09:01:19,510 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-23 09:01:19,511 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-23 09:01:19,511 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-23 09:01:19,512 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-23 09:01:19,512 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-23 09:01:19,512 INFO L133 SettingsManager]: * Use SBE=true [2018-11-23 09:01:19,512 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-23 09:01:19,512 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-23 09:01:19,512 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-23 09:01:19,513 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-23 09:01:19,513 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-23 09:01:19,513 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-23 09:01:19,513 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-11-23 09:01:19,513 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-11-23 09:01:19,513 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-11-23 09:01:19,513 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-23 09:01:19,513 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-23 09:01:19,514 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-23 09:01:19,514 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-23 09:01:19,514 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-23 09:01:19,514 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-23 09:01:19,514 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-23 09:01:19,514 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 09:01:19,514 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-23 09:01:19,514 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-23 09:01:19,515 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-23 09:01:19,515 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-23 09:01:19,515 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in 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_8239026d-569d-4054-923b-518601353f25/bin-2019/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 767ec81abc1d53fd457a174594199b33ee40a3be [2018-11-23 09:01:19,541 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-23 09:01:19,550 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-23 09:01:19,553 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-23 09:01:19,554 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-23 09:01:19,554 INFO L276 PluginConnector]: CDTParser initialized [2018-11-23 09:01:19,555 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_8239026d-569d-4054-923b-518601353f25/bin-2019/uautomizer/../../sv-benchmarks/c/memsafety-ext3/scopes5_false-valid-deref.c [2018-11-23 09:01:19,599 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_8239026d-569d-4054-923b-518601353f25/bin-2019/uautomizer/data/bb850bfff/8431328fd60849f99c071eb0f480ebb8/FLAGddf985202 [2018-11-23 09:01:19,996 INFO L307 CDTParser]: Found 1 translation units. [2018-11-23 09:01:19,996 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_8239026d-569d-4054-923b-518601353f25/sv-benchmarks/c/memsafety-ext3/scopes5_false-valid-deref.c [2018-11-23 09:01:20,000 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_8239026d-569d-4054-923b-518601353f25/bin-2019/uautomizer/data/bb850bfff/8431328fd60849f99c071eb0f480ebb8/FLAGddf985202 [2018-11-23 09:01:20,010 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_8239026d-569d-4054-923b-518601353f25/bin-2019/uautomizer/data/bb850bfff/8431328fd60849f99c071eb0f480ebb8 [2018-11-23 09:01:20,013 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-23 09:01:20,014 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-23 09:01:20,015 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-23 09:01:20,015 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-23 09:01:20,017 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-23 09:01:20,018 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:01:20" (1/1) ... [2018-11-23 09:01:20,020 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d610604 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:01:20, skipping insertion in model container [2018-11-23 09:01:20,020 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:01:20" (1/1) ... [2018-11-23 09:01:20,029 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-23 09:01:20,043 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-23 09:01:20,175 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 09:01:20,182 INFO L191 MainTranslator]: Completed pre-run [2018-11-23 09:01:20,191 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 09:01:20,202 INFO L195 MainTranslator]: Completed translation [2018-11-23 09:01:20,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:01:20 WrapperNode [2018-11-23 09:01:20,202 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-23 09:01:20,203 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-23 09:01:20,203 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-23 09:01:20,203 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-23 09:01:20,210 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:01:20" (1/1) ... [2018-11-23 09:01:20,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:01:20" (1/1) ... [2018-11-23 09:01:20,216 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:01:20" (1/1) ... [2018-11-23 09:01:20,216 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:01:20" (1/1) ... [2018-11-23 09:01:20,219 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:01:20" (1/1) ... [2018-11-23 09:01:20,220 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:01:20" (1/1) ... [2018-11-23 09:01:20,221 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:01:20" (1/1) ... [2018-11-23 09:01:20,222 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-23 09:01:20,222 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-23 09:01:20,222 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-23 09:01:20,223 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-23 09:01:20,223 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:01:20" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8239026d-569d-4054-923b-518601353f25/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 09:01:20,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-23 09:01:20,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-23 09:01:20,295 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-23 09:01:20,295 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-23 09:01:20,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-23 09:01:20,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-23 09:01:20,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-11-23 09:01:20,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-23 09:01:20,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-23 09:01:20,295 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-11-23 09:01:20,395 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-23 09:01:20,395 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-11-23 09:01:20,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:01:20 BoogieIcfgContainer [2018-11-23 09:01:20,396 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-23 09:01:20,397 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-23 09:01:20,397 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-23 09:01:20,400 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-23 09:01:20,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:01:20" (1/3) ... [2018-11-23 09:01:20,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f3664a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:01:20, skipping insertion in model container [2018-11-23 09:01:20,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:01:20" (2/3) ... [2018-11-23 09:01:20,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f3664a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:01:20, skipping insertion in model container [2018-11-23 09:01:20,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:01:20" (3/3) ... [2018-11-23 09:01:20,403 INFO L112 eAbstractionObserver]: Analyzing ICFG scopes5_false-valid-deref.c [2018-11-23 09:01:20,412 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-23 09:01:20,416 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-11-23 09:01:20,426 INFO L257 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2018-11-23 09:01:20,442 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-23 09:01:20,443 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-23 09:01:20,443 INFO L383 AbstractCegarLoop]: Hoare is false [2018-11-23 09:01:20,443 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-23 09:01:20,443 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-23 09:01:20,443 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-23 09:01:20,443 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-23 09:01:20,443 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-23 09:01:20,443 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-23 09:01:20,454 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2018-11-23 09:01:20,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-11-23 09:01:20,461 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 09:01:20,461 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 09:01:20,463 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION]=== [2018-11-23 09:01:20,467 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:01:20,467 INFO L82 PathProgramCache]: Analyzing trace with hash 2096341080, now seen corresponding path program 1 times [2018-11-23 09:01:20,468 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 09:01:20,468 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 09:01:20,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:01:20,498 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 09:01:20,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:01:20,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 09:01:20,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 09:01:20,542 INFO L469 BasicCegarLoop]: Counterexample might be feasible ----- class de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBacktranslator [?] CALL call ULTIMATE.init(); VAL [|#NULL.base|=43, |#NULL.offset|=41, |old(#NULL.base)|=43, |old(#NULL.offset)|=41] [?] #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0]; VAL [|#NULL.base|=0, |#NULL.offset|=0, |old(#NULL.base)|=43, |old(#NULL.offset)|=41] [?] assume true; VAL [|#NULL.base|=0, |#NULL.offset|=0, |old(#NULL.base)|=43, |old(#NULL.offset)|=41] [?] RET #18#return; VAL [|#NULL.base|=0, |#NULL.offset|=0] [?] CALL call #t~ret0 := main(); VAL [|#NULL.base|=0, |#NULL.offset|=0] [?] havoc ~p~0.base, ~p~0.offset; VAL [|#NULL.base|=0, |#NULL.offset|=0] [?] call ~#a~0.base, ~#a~0.offset := #Ultimate.alloc(40);~p~0.base, ~p~0.offset := ~#a~0.base, ~#a~0.offset;call ULTIMATE.dealloc(~#a~0.base, ~#a~0.offset);havoc ~#a~0.base, ~#a~0.offset; VAL [main_~p~0.base=42, main_~p~0.offset=0, |#NULL.base|=0, |#NULL.offset|=0] [?] assume !(1 == #valid[~p~0.base]); VAL [main_~p~0.base=42, main_~p~0.offset=0, |#NULL.base|=0, |#NULL.offset|=0] [?] CALL call ULTIMATE.init(); VAL [#NULL.base=43, #NULL.offset=41, old(#NULL.base)=43, old(#NULL.offset)=41] [?] #NULL.base, #NULL.offset := 0, 0; [?] #valid := #valid[0 := 0]; VAL [#NULL.base=0, #NULL.offset=0, old(#NULL.base)=43, old(#NULL.offset)=41] [?] ensures true; VAL [#NULL.base=0, #NULL.offset=0, old(#NULL.base)=43, old(#NULL.offset)=41] [?] RET call ULTIMATE.init(); VAL [#NULL.base=0, #NULL.offset=0] [?] CALL call #t~ret0 := main(); VAL [#NULL.base=0, #NULL.offset=0] [L2] havoc ~p~0.base, ~p~0.offset; VAL [#NULL.base=0, #NULL.offset=0] [L4] call ~#a~0.base, ~#a~0.offset := #Ultimate.alloc(40); [L5] ~p~0.base, ~p~0.offset := ~#a~0.base, ~#a~0.offset; [L4] call ULTIMATE.dealloc(~#a~0.base, ~#a~0.offset); [L4] havoc ~#a~0.base, ~#a~0.offset; VAL [#NULL.base=0, #NULL.offset=0, ~p~0.base=42, ~p~0.offset=0] [L7] call write~int(1, ~p~0.base, ~p~0.offset, 4); [?] requires 1 == #valid[#ptr.base]; VAL [#NULL.base=0, #NULL.offset=0, ~p~0.base=42, ~p~0.offset=0] ----- ----- class de.uni_freiburg.informatik.ultimate.boogie.preprocessor.BoogiePreprocessorBacktranslator [?] CALL call ULTIMATE.init(); VAL [#NULL.base=43, #NULL.offset=41, old(#NULL.base)=43, old(#NULL.offset)=41] [?] #NULL.base, #NULL.offset := 0, 0; [?] #valid := #valid[0 := 0]; VAL [#NULL.base=0, #NULL.offset=0, old(#NULL.base)=43, old(#NULL.offset)=41] [?] ensures true; VAL [#NULL.base=0, #NULL.offset=0, old(#NULL.base)=43, old(#NULL.offset)=41] [?] RET call ULTIMATE.init(); VAL [#NULL.base=0, #NULL.offset=0] [?] CALL call #t~ret0 := main(); VAL [#NULL.base=0, #NULL.offset=0] [L2] havoc ~p~0.base, ~p~0.offset; VAL [#NULL.base=0, #NULL.offset=0] [L4] call ~#a~0.base, ~#a~0.offset := #Ultimate.alloc(40); [L5] ~p~0.base, ~p~0.offset := ~#a~0.base, ~#a~0.offset; [L4] call ULTIMATE.dealloc(~#a~0.base, ~#a~0.offset); [L4] havoc ~#a~0.base, ~#a~0.offset; VAL [#NULL.base=0, #NULL.offset=0, ~p~0.base=42, ~p~0.offset=0] [L7] call write~int(1, ~p~0.base, ~p~0.offset, 4); [?] requires 1 == #valid[#ptr.base]; VAL [#NULL.base=0, #NULL.offset=0, ~p~0.base=42, ~p~0.offset=0] [?] CALL call ULTIMATE.init(); VAL [#NULL!base=43, #NULL!offset=41, old(#NULL!base)=43, old(#NULL!offset)=41] [?] #NULL := { base: 0, offset: 0 }; [?] #valid[0] := 0; VAL [#NULL!base=0, #NULL!offset=0, old(#NULL!base)=43, old(#NULL!offset)=41] [?] RET call ULTIMATE.init(); VAL [#NULL!base=0, #NULL!offset=0] [?] CALL call #t~ret0 := main(); VAL [#NULL!base=0, #NULL!offset=0] [L2] havoc ~p~0; VAL [#NULL!base=0, #NULL!offset=0] [L4] FCALL call ~#a~0 := #Ultimate.alloc(40); [L5] ~p~0 := ~#a~0; [L4] FCALL call ULTIMATE.dealloc(~#a~0); [L4] havoc ~#a~0; VAL [#NULL!base=0, #NULL!offset=0, ~p~0!base=42, ~p~0!offset=0] [L7] FCALL call write~int(1, { base: ~p~0!base, offset: ~p~0!offset }, 4); [?] requires 1 == #valid[#ptr.base]; VAL [#NULL!base=0, #NULL!offset=0, ~p~0!base=42, ~p~0!offset=0] ----- ----- class de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieBacktranslator [?] CALL call ULTIMATE.init(); VAL [#NULL!base=43, #NULL!offset=41, old(#NULL!base)=43, old(#NULL!offset)=41] [?] #NULL := { base: 0, offset: 0 }; [?] #valid[0] := 0; VAL [#NULL!base=0, #NULL!offset=0, old(#NULL!base)=43, old(#NULL!offset)=41] [?] RET call ULTIMATE.init(); VAL [#NULL!base=0, #NULL!offset=0] [?] CALL call #t~ret0 := main(); VAL [#NULL!base=0, #NULL!offset=0] [L2] havoc ~p~0; VAL [#NULL!base=0, #NULL!offset=0] [L4] FCALL call ~#a~0 := #Ultimate.alloc(40); [L5] ~p~0 := ~#a~0; [L4] FCALL call ULTIMATE.dealloc(~#a~0); [L4] havoc ~#a~0; VAL [#NULL!base=0, #NULL!offset=0, ~p~0!base=42, ~p~0!offset=0] [L7] FCALL call write~int(1, { base: ~p~0!base, offset: ~p~0!offset }, 4); [?] requires 1 == #valid[#ptr.base]; VAL [#NULL!base=0, #NULL!offset=0, ~p~0!base=42, ~p~0!offset=0] [L2] int* p; [L4] int a[10]; [L5] p = a [L7] p[0] = 1 ----- [2018-11-23 09:01:20,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 09:01:20 BoogieIcfgContainer [2018-11-23 09:01:20,558 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-23 09:01:20,559 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-23 09:01:20,559 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-23 09:01:20,559 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-23 09:01:20,559 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:01:20" (3/4) ... [2018-11-23 09:01:20,561 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample ----- class de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBacktranslator [?] CALL call ULTIMATE.init(); VAL [|#NULL.base|=43, |#NULL.offset|=41, |old(#NULL.base)|=43, |old(#NULL.offset)|=41] [?] #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0]; VAL [|#NULL.base|=0, |#NULL.offset|=0, |old(#NULL.base)|=43, |old(#NULL.offset)|=41] [?] assume true; VAL [|#NULL.base|=0, |#NULL.offset|=0, |old(#NULL.base)|=43, |old(#NULL.offset)|=41] [?] RET #18#return; VAL [|#NULL.base|=0, |#NULL.offset|=0] [?] CALL call #t~ret0 := main(); VAL [|#NULL.base|=0, |#NULL.offset|=0] [?] havoc ~p~0.base, ~p~0.offset; VAL [|#NULL.base|=0, |#NULL.offset|=0] [?] call ~#a~0.base, ~#a~0.offset := #Ultimate.alloc(40);~p~0.base, ~p~0.offset := ~#a~0.base, ~#a~0.offset;call ULTIMATE.dealloc(~#a~0.base, ~#a~0.offset);havoc ~#a~0.base, ~#a~0.offset; VAL [main_~p~0.base=42, main_~p~0.offset=0, |#NULL.base|=0, |#NULL.offset|=0] [?] assume !(1 == #valid[~p~0.base]); VAL [main_~p~0.base=42, main_~p~0.offset=0, |#NULL.base|=0, |#NULL.offset|=0] [?] CALL call ULTIMATE.init(); VAL [#NULL.base=43, #NULL.offset=41, old(#NULL.base)=43, old(#NULL.offset)=41] [?] #NULL.base, #NULL.offset := 0, 0; [?] #valid := #valid[0 := 0]; VAL [#NULL.base=0, #NULL.offset=0, old(#NULL.base)=43, old(#NULL.offset)=41] [?] ensures true; VAL [#NULL.base=0, #NULL.offset=0, old(#NULL.base)=43, old(#NULL.offset)=41] [?] RET call ULTIMATE.init(); VAL [#NULL.base=0, #NULL.offset=0] [?] CALL call #t~ret0 := main(); VAL [#NULL.base=0, #NULL.offset=0] [L2] havoc ~p~0.base, ~p~0.offset; VAL [#NULL.base=0, #NULL.offset=0] [L4] call ~#a~0.base, ~#a~0.offset := #Ultimate.alloc(40); [L5] ~p~0.base, ~p~0.offset := ~#a~0.base, ~#a~0.offset; [L4] call ULTIMATE.dealloc(~#a~0.base, ~#a~0.offset); [L4] havoc ~#a~0.base, ~#a~0.offset; VAL [#NULL.base=0, #NULL.offset=0, ~p~0.base=42, ~p~0.offset=0] [L7] call write~int(1, ~p~0.base, ~p~0.offset, 4); [?] requires 1 == #valid[#ptr.base]; VAL [#NULL.base=0, #NULL.offset=0, ~p~0.base=42, ~p~0.offset=0] ----- ----- class de.uni_freiburg.informatik.ultimate.boogie.preprocessor.BoogiePreprocessorBacktranslator [?] CALL call ULTIMATE.init(); VAL [#NULL.base=43, #NULL.offset=41, old(#NULL.base)=43, old(#NULL.offset)=41] [?] #NULL.base, #NULL.offset := 0, 0; [?] #valid := #valid[0 := 0]; VAL [#NULL.base=0, #NULL.offset=0, old(#NULL.base)=43, old(#NULL.offset)=41] [?] ensures true; VAL [#NULL.base=0, #NULL.offset=0, old(#NULL.base)=43, old(#NULL.offset)=41] [?] RET call ULTIMATE.init(); VAL [#NULL.base=0, #NULL.offset=0] [?] CALL call #t~ret0 := main(); VAL [#NULL.base=0, #NULL.offset=0] [L2] havoc ~p~0.base, ~p~0.offset; VAL [#NULL.base=0, #NULL.offset=0] [L4] call ~#a~0.base, ~#a~0.offset := #Ultimate.alloc(40); [L5] ~p~0.base, ~p~0.offset := ~#a~0.base, ~#a~0.offset; [L4] call ULTIMATE.dealloc(~#a~0.base, ~#a~0.offset); [L4] havoc ~#a~0.base, ~#a~0.offset; VAL [#NULL.base=0, #NULL.offset=0, ~p~0.base=42, ~p~0.offset=0] [L7] call write~int(1, ~p~0.base, ~p~0.offset, 4); [?] requires 1 == #valid[#ptr.base]; VAL [#NULL.base=0, #NULL.offset=0, ~p~0.base=42, ~p~0.offset=0] [?] CALL call ULTIMATE.init(); VAL [#NULL!base=43, #NULL!offset=41, old(#NULL!base)=43, old(#NULL!offset)=41] [?] #NULL := { base: 0, offset: 0 }; [?] #valid[0] := 0; VAL [#NULL!base=0, #NULL!offset=0, old(#NULL!base)=43, old(#NULL!offset)=41] [?] RET call ULTIMATE.init(); VAL [#NULL!base=0, #NULL!offset=0] [?] CALL call #t~ret0 := main(); VAL [#NULL!base=0, #NULL!offset=0] [L2] havoc ~p~0; VAL [#NULL!base=0, #NULL!offset=0] [L4] FCALL call ~#a~0 := #Ultimate.alloc(40); [L5] ~p~0 := ~#a~0; [L4] FCALL call ULTIMATE.dealloc(~#a~0); [L4] havoc ~#a~0; VAL [#NULL!base=0, #NULL!offset=0, ~p~0!base=42, ~p~0!offset=0] [L7] FCALL call write~int(1, { base: ~p~0!base, offset: ~p~0!offset }, 4); [?] requires 1 == #valid[#ptr.base]; VAL [#NULL!base=0, #NULL!offset=0, ~p~0!base=42, ~p~0!offset=0] ----- ----- class de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieBacktranslator [?] CALL call ULTIMATE.init(); VAL [#NULL!base=43, #NULL!offset=41, old(#NULL!base)=43, old(#NULL!offset)=41] [?] #NULL := { base: 0, offset: 0 }; [?] #valid[0] := 0; VAL [#NULL!base=0, #NULL!offset=0, old(#NULL!base)=43, old(#NULL!offset)=41] [?] RET call ULTIMATE.init(); VAL [#NULL!base=0, #NULL!offset=0] [?] CALL call #t~ret0 := main(); VAL [#NULL!base=0, #NULL!offset=0] [L2] havoc ~p~0; VAL [#NULL!base=0, #NULL!offset=0] [L4] FCALL call ~#a~0 := #Ultimate.alloc(40); [L5] ~p~0 := ~#a~0; [L4] FCALL call ULTIMATE.dealloc(~#a~0); [L4] havoc ~#a~0; VAL [#NULL!base=0, #NULL!offset=0, ~p~0!base=42, ~p~0!offset=0] [L7] FCALL call write~int(1, { base: ~p~0!base, offset: ~p~0!offset }, 4); [?] requires 1 == #valid[#ptr.base]; VAL [#NULL!base=0, #NULL!offset=0, ~p~0!base=42, ~p~0!offset=0] [L2] int* p; [L4] int a[10]; [L5] p = a [L7] p[0] = 1 ----- [2018-11-23 09:01:20,589 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_8239026d-569d-4054-923b-518601353f25/bin-2019/uautomizer/witness.graphml [2018-11-23 09:01:20,589 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-23 09:01:20,590 INFO L168 Benchmark]: Toolchain (without parser) took 576.57 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 124.3 MB). Free memory was 959.1 MB in the beginning and 1.1 GB in the end (delta: -126.8 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 09:01:20,591 INFO L168 Benchmark]: CDTParser took 0.15 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. [2018-11-23 09:01:20,591 INFO L168 Benchmark]: CACSL2BoogieTranslator took 188.04 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.3 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. [2018-11-23 09:01:20,592 INFO L168 Benchmark]: Boogie Preprocessor took 19.25 ms. Allocated memory is still 1.0 GB. Free memory was 948.3 MB in the beginning and 945.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-23 09:01:20,593 INFO L168 Benchmark]: RCFGBuilder took 173.72 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 124.3 MB). Free memory was 945.6 MB in the beginning and 1.1 GB in the end (delta: -161.4 MB). Peak memory consumption was 14.1 MB. Max. memory is 11.5 GB. [2018-11-23 09:01:20,593 INFO L168 Benchmark]: TraceAbstraction took 161.73 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: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 11.5 GB. [2018-11-23 09:01:20,594 INFO L168 Benchmark]: Witness Printer took 30.77 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: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 11.5 GB. [2018-11-23 09:01:20,597 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 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 188.04 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.3 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 19.25 ms. Allocated memory is still 1.0 GB. Free memory was 948.3 MB in the beginning and 945.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 173.72 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 124.3 MB). Free memory was 945.6 MB in the beginning and 1.1 GB in the end (delta: -161.4 MB). Peak memory consumption was 14.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 161.73 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: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 11.5 GB. * Witness Printer took 30.77 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: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 7]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L2] int* p; [L4] int a[10]; [L5] p = a [L7] p[0] = 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 15 locations, 3 error locations. UNSAFE Result, 0.1s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 8 NumberOfCodeBlocks, 8 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...