./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memset_-write.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b5699aa Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_5f3b110a-880b-49f6-a86d-2e61549be045/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_5f3b110a-880b-49f6-a86d-2e61549be045/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_5f3b110a-880b-49f6-a86d-2e61549be045/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_5f3b110a-880b-49f6-a86d-2e61549be045/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memset_-write.c -s /tmp/vcloud-vcloud-master/worker/run_dir_5f3b110a-880b-49f6-a86d-2e61549be045/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_5f3b110a-880b-49f6-a86d-2e61549be045/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 220c5b7d1335976595fe0a31f6bacc2d390016c7 .......................................................................................................................................................................................................................................................................................................................... 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 --- Skipped default analysis because property is memsafety ### Bit-precise run ### This is Ultimate 0.1.24-6b5699a [2019-11-26 03:00:26,433 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 03:00:26,435 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 03:00:26,449 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 03:00:26,449 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 03:00:26,450 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 03:00:26,452 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 03:00:26,460 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 03:00:26,465 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 03:00:26,469 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 03:00:26,470 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 03:00:26,471 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 03:00:26,471 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 03:00:26,474 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 03:00:26,475 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 03:00:26,476 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 03:00:26,477 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 03:00:26,478 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 03:00:26,480 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 03:00:26,484 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 03:00:26,488 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 03:00:26,491 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 03:00:26,492 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 03:00:26,493 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 03:00:26,495 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 03:00:26,495 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 03:00:26,496 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 03:00:26,497 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 03:00:26,498 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 03:00:26,499 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 03:00:26,500 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 03:00:26,501 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 03:00:26,502 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 03:00:26,502 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 03:00:26,503 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 03:00:26,503 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 03:00:26,504 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 03:00:26,504 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 03:00:26,505 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 03:00:26,505 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 03:00:26,507 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 03:00:26,507 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_5f3b110a-880b-49f6-a86d-2e61549be045/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2019-11-26 03:00:26,532 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 03:00:26,541 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 03:00:26,542 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 03:00:26,542 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 03:00:26,543 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 03:00:26,543 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 03:00:26,543 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 03:00:26,543 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 03:00:26,544 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 03:00:26,544 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-26 03:00:26,544 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-26 03:00:26,545 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 03:00:26,545 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 03:00:26,545 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-26 03:00:26,545 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 03:00:26,546 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 03:00:26,546 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 03:00:26,546 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-26 03:00:26,546 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-26 03:00:26,546 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-26 03:00:26,547 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 03:00:26,547 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-26 03:00:26,547 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-26 03:00:26,547 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-26 03:00:26,548 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 03:00:26,548 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-26 03:00:26,548 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 03:00:26,548 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-26 03:00:26,549 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 03:00:26,549 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 03:00:26,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 03:00:26,549 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 03:00:26,549 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 03:00:26,550 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-11-26 03:00:26,550 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-26 03:00:26,550 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 03:00:26,550 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_5f3b110a-880b-49f6-a86d-2e61549be045/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 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 -> 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 -> 220c5b7d1335976595fe0a31f6bacc2d390016c7 [2019-11-26 03:00:26,691 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 03:00:26,702 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 03:00:26,705 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 03:00:26,707 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 03:00:26,707 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 03:00:26,708 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_5f3b110a-880b-49f6-a86d-2e61549be045/bin/utaipan/../../sv-benchmarks/c/ldv-memsafety/memset_-write.c [2019-11-26 03:00:26,759 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5f3b110a-880b-49f6-a86d-2e61549be045/bin/utaipan/data/88d1d825d/61f6d04f6c59407081143112a801c26b/FLAGa83cd013e [2019-11-26 03:00:27,168 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 03:00:27,169 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_5f3b110a-880b-49f6-a86d-2e61549be045/sv-benchmarks/c/ldv-memsafety/memset_-write.c [2019-11-26 03:00:27,176 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5f3b110a-880b-49f6-a86d-2e61549be045/bin/utaipan/data/88d1d825d/61f6d04f6c59407081143112a801c26b/FLAGa83cd013e [2019-11-26 03:00:27,193 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_5f3b110a-880b-49f6-a86d-2e61549be045/bin/utaipan/data/88d1d825d/61f6d04f6c59407081143112a801c26b [2019-11-26 03:00:27,196 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 03:00:27,197 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 03:00:27,200 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 03:00:27,200 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 03:00:27,203 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 03:00:27,204 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 03:00:27" (1/1) ... [2019-11-26 03:00:27,206 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@199165bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:00:27, skipping insertion in model container [2019-11-26 03:00:27,206 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 03:00:27" (1/1) ... [2019-11-26 03:00:27,213 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 03:00:27,232 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 03:00:27,370 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 03:00:27,443 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 03:00:27,464 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 03:00:27,485 INFO L205 MainTranslator]: Completed translation [2019-11-26 03:00:27,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:00:27 WrapperNode [2019-11-26 03:00:27,485 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 03:00:27,486 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 03:00:27,486 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 03:00:27,487 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 03:00:27,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:00:27" (1/1) ... [2019-11-26 03:00:27,502 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:00:27" (1/1) ... [2019-11-26 03:00:27,520 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 03:00:27,521 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 03:00:27,521 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 03:00:27,521 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 03:00:27,527 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:00:27" (1/1) ... [2019-11-26 03:00:27,528 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:00:27" (1/1) ... [2019-11-26 03:00:27,529 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:00:27" (1/1) ... [2019-11-26 03:00:27,530 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:00:27" (1/1) ... [2019-11-26 03:00:27,534 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:00:27" (1/1) ... [2019-11-26 03:00:27,537 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:00:27" (1/1) ... [2019-11-26 03:00:27,539 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:00:27" (1/1) ... [2019-11-26 03:00:27,541 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 03:00:27,541 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 03:00:27,541 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 03:00:27,541 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 03:00:27,542 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:00:27" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5f3b110a-880b-49f6-a86d-2e61549be045/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 03:00:27,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 03:00:27,605 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 03:00:27,607 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-26 03:00:27,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-26 03:00:27,907 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 03:00:27,908 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-11-26 03:00:27,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 03:00:27 BoogieIcfgContainer [2019-11-26 03:00:27,909 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 03:00:27,910 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 03:00:27,910 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 03:00:27,912 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 03:00:27,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 03:00:27" (1/3) ... [2019-11-26 03:00:27,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@334bc3e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 03:00:27, skipping insertion in model container [2019-11-26 03:00:27,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:00:27" (2/3) ... [2019-11-26 03:00:27,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@334bc3e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 03:00:27, skipping insertion in model container [2019-11-26 03:00:27,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 03:00:27" (3/3) ... [2019-11-26 03:00:27,916 INFO L109 eAbstractionObserver]: Analyzing ICFG memset_-write.c [2019-11-26 03:00:27,925 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 03:00:27,939 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2019-11-26 03:00:27,952 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-11-26 03:00:27,970 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 03:00:27,970 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-26 03:00:27,970 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 03:00:27,970 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 03:00:27,971 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 03:00:27,971 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 03:00:27,971 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 03:00:27,971 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 03:00:27,991 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2019-11-26 03:00:28,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-11-26 03:00:28,018 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 03:00:28,019 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-11-26 03:00:28,019 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-11-26 03:00:28,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 03:00:28,029 INFO L82 PathProgramCache]: Analyzing trace with hash 29856, now seen corresponding path program 1 times [2019-11-26 03:00:28,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 03:00:28,040 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1957909126] [2019-11-26 03:00:28,041 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5f3b110a-880b-49f6-a86d-2e61549be045/bin/utaipan/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 03:00:28,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 03:00:28,124 INFO L255 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-26 03:00:28,127 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 03:00:28,183 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-26 03:00:28,183 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 03:00:28,189 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 03:00:28,190 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 03:00:28,190 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-26 03:00:28,202 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 03:00:28,202 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 03:00:28,206 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 03:00:28,206 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1957909126] [2019-11-26 03:00:28,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 03:00:28,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-26 03:00:28,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498841076] [2019-11-26 03:00:28,211 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-26 03:00:28,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 03:00:28,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-26 03:00:28,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 03:00:28,223 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2019-11-26 03:00:28,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 03:00:28,251 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2019-11-26 03:00:28,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-26 03:00:28,253 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-11-26 03:00:28,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 03:00:28,260 INFO L225 Difference]: With dead ends: 11 [2019-11-26 03:00:28,260 INFO L226 Difference]: Without dead ends: 9 [2019-11-26 03:00:28,262 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 03:00:28,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-11-26 03:00:28,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-11-26 03:00:28,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-26 03:00:28,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2019-11-26 03:00:28,287 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 3 [2019-11-26 03:00:28,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 03:00:28,288 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2019-11-26 03:00:28,288 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-26 03:00:28,288 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2019-11-26 03:00:28,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-11-26 03:00:28,288 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 03:00:28,288 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-11-26 03:00:28,489 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 03:00:28,490 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-11-26 03:00:28,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 03:00:28,490 INFO L82 PathProgramCache]: Analyzing trace with hash 925572, now seen corresponding path program 1 times [2019-11-26 03:00:28,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 03:00:28,491 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [273184940] [2019-11-26 03:00:28,491 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5f3b110a-880b-49f6-a86d-2e61549be045/bin/utaipan/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 03:00:28,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 03:00:28,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 03:00:28,574 INFO L174 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2019-11-26 03:00:28,575 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-26 03:00:28,776 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 03:00:28,785 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2019-11-26 03:00:28,785 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2019-11-26 03:00:28,786 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2019-11-26 03:00:28,786 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2019-11-26 03:00:28,786 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2019-11-26 03:00:28,787 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2019-11-26 03:00:28,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 03:00:28 BoogieIcfgContainer [2019-11-26 03:00:28,793 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-26 03:00:28,794 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-26 03:00:28,794 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-26 03:00:28,794 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-26 03:00:28,794 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 03:00:27" (3/4) ... [2019-11-26 03:00:28,797 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-26 03:00:28,798 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2019-11-26 03:00:28,798 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2019-11-26 03:00:28,798 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2019-11-26 03:00:28,798 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2019-11-26 03:00:28,799 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2019-11-26 03:00:28,799 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2019-11-26 03:00:28,839 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_5f3b110a-880b-49f6-a86d-2e61549be045/bin/utaipan/witness.graphml [2019-11-26 03:00:28,839 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-26 03:00:28,843 INFO L168 Benchmark]: Toolchain (without parser) took 1645.43 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 157.3 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -142.1 MB). Peak memory consumption was 15.2 MB. Max. memory is 11.5 GB. [2019-11-26 03:00:28,844 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 03:00:28,845 INFO L168 Benchmark]: CACSL2BoogieTranslator took 285.89 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 157.3 MB). Free memory was 950.1 MB in the beginning and 1.2 GB in the end (delta: -202.0 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-11-26 03:00:28,845 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.20 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 03:00:28,846 INFO L168 Benchmark]: Boogie Preprocessor took 20.24 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 03:00:28,846 INFO L168 Benchmark]: RCFGBuilder took 367.87 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: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. [2019-11-26 03:00:28,847 INFO L168 Benchmark]: TraceAbstraction took 883.54 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: 41.6 MB). Peak memory consumption was 41.6 MB. Max. memory is 11.5 GB. [2019-11-26 03:00:28,847 INFO L168 Benchmark]: Witness Printer took 45.83 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 03:00:28,850 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 285.89 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 157.3 MB). Free memory was 950.1 MB in the beginning and 1.2 GB in the end (delta: -202.0 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 34.20 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 20.24 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 367.87 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: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 883.54 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: 41.6 MB). Peak memory consumption was 41.6 MB. Max. memory is 11.5 GB. * Witness Printer took 45.83 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.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: -1]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L26] struct ppp_comp_stats cstats ; - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 3 error locations. Result: UNSAFE, OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 7 SDtfs, 5 SDslu, 1 SDs, 0 SdLazy, 8 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred in iteration=0, 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 7 NumberOfCodeBlocks, 7 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 24 SizeOfPredicates, 2 NumberOfNonLiveVariables, 19 ConjunctsInSsa, 3 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...