./Ultimate.py --spec ../../sv-benchmarks/c/MemSafety.prp --file ../../sv-benchmarks/c/array-memsafety/diff_usafe_false-valid-deref.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_953d7a09-ab22-49ee-8ff0-24c03060dcbb/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_953d7a09-ab22-49ee-8ff0-24c03060dcbb/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_953d7a09-ab22-49ee-8ff0-24c03060dcbb/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_953d7a09-ab22-49ee-8ff0-24c03060dcbb/bin-2019/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/diff_usafe_false-valid-deref.i -s /tmp/vcloud-vcloud-master/worker/working_dir_953d7a09-ab22-49ee-8ff0-24c03060dcbb/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_953d7a09-ab22-49ee-8ff0-24c03060dcbb/bin-2019/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 c4e0be718883e167d4be051b03c3a4364271b932 .......................................................................................................................................................................................................................................................................................... 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 0.1.23-1dbac8b [2018-11-10 04:22:59,686 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 04:22:59,687 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 04:22:59,696 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 04:22:59,696 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 04:22:59,697 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 04:22:59,698 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 04:22:59,700 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 04:22:59,701 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 04:22:59,702 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 04:22:59,703 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 04:22:59,703 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 04:22:59,704 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 04:22:59,704 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 04:22:59,705 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 04:22:59,705 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 04:22:59,706 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 04:22:59,707 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 04:22:59,708 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 04:22:59,709 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 04:22:59,710 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 04:22:59,711 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 04:22:59,713 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 04:22:59,714 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 04:22:59,714 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 04:22:59,714 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 04:22:59,715 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 04:22:59,715 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 04:22:59,716 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 04:22:59,717 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 04:22:59,717 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 04:22:59,718 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 04:22:59,718 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 04:22:59,718 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 04:22:59,719 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 04:22:59,720 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 04:22:59,720 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_953d7a09-ab22-49ee-8ff0-24c03060dcbb/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2018-11-10 04:22:59,730 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 04:22:59,730 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 04:22:59,731 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 04:22:59,731 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-10 04:22:59,731 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-10 04:22:59,731 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-10 04:22:59,731 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-10 04:22:59,732 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-10 04:22:59,732 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-10 04:22:59,732 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-10 04:22:59,732 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-10 04:22:59,733 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-10 04:22:59,733 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-10 04:22:59,733 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 04:22:59,733 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 04:22:59,734 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-10 04:22:59,734 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-10 04:22:59,734 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 04:22:59,734 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 04:22:59,734 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-11-10 04:22:59,734 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-11-10 04:22:59,735 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-11-10 04:22:59,735 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 04:22:59,735 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 04:22:59,735 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 04:22:59,735 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 04:22:59,735 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 04:22:59,735 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 04:22:59,736 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 04:22:59,736 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 04:22:59,736 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 04:22:59,736 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-10 04:22:59,736 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 04:22:59,736 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-10 04:22:59,737 INFO L133 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/working_dir_953d7a09-ab22-49ee-8ff0-24c03060dcbb/bin-2019/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 -> c4e0be718883e167d4be051b03c3a4364271b932 [2018-11-10 04:22:59,766 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 04:22:59,777 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 04:22:59,780 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 04:22:59,782 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 04:22:59,782 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 04:22:59,783 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_953d7a09-ab22-49ee-8ff0-24c03060dcbb/bin-2019/utaipan/../../sv-benchmarks/c/array-memsafety/diff_usafe_false-valid-deref.i [2018-11-10 04:22:59,840 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_953d7a09-ab22-49ee-8ff0-24c03060dcbb/bin-2019/utaipan/data/01007a856/ca1b3e30e2b84fde8300991246fd01ed/FLAG182f19ec7 [2018-11-10 04:23:00,161 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 04:23:00,161 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_953d7a09-ab22-49ee-8ff0-24c03060dcbb/sv-benchmarks/c/array-memsafety/diff_usafe_false-valid-deref.i [2018-11-10 04:23:00,167 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_953d7a09-ab22-49ee-8ff0-24c03060dcbb/bin-2019/utaipan/data/01007a856/ca1b3e30e2b84fde8300991246fd01ed/FLAG182f19ec7 [2018-11-10 04:23:00,176 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_953d7a09-ab22-49ee-8ff0-24c03060dcbb/bin-2019/utaipan/data/01007a856/ca1b3e30e2b84fde8300991246fd01ed [2018-11-10 04:23:00,178 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 04:23:00,179 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-10 04:23:00,180 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 04:23:00,180 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 04:23:00,183 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 04:23:00,184 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 04:23:00" (1/1) ... [2018-11-10 04:23:00,186 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@133164ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:23:00, skipping insertion in model container [2018-11-10 04:23:00,186 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 04:23:00" (1/1) ... [2018-11-10 04:23:00,192 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 04:23:00,206 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 04:23:00,313 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 04:23:00,320 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 04:23:00,333 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 04:23:00,344 INFO L193 MainTranslator]: Completed translation [2018-11-10 04:23:00,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:23:00 WrapperNode [2018-11-10 04:23:00,344 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 04:23:00,345 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-10 04:23:00,345 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-10 04:23:00,345 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-10 04:23:00,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:23:00" (1/1) ... [2018-11-10 04:23:00,357 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:23:00" (1/1) ... [2018-11-10 04:23:00,372 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-10 04:23:00,372 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 04:23:00,372 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 04:23:00,372 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 04:23:00,379 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:23:00" (1/1) ... [2018-11-10 04:23:00,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:23:00" (1/1) ... [2018-11-10 04:23:00,381 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:23:00" (1/1) ... [2018-11-10 04:23:00,381 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:23:00" (1/1) ... [2018-11-10 04:23:00,385 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:23:00" (1/1) ... [2018-11-10 04:23:00,390 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:23:00" (1/1) ... [2018-11-10 04:23:00,391 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:23:00" (1/1) ... [2018-11-10 04:23:00,392 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 04:23:00,393 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 04:23:00,393 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 04:23:00,393 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 04:23:00,394 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:23:00" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_953d7a09-ab22-49ee-8ff0-24c03060dcbb/bin-2019/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 [2018-11-10 04:23:00,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 04:23:00,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 04:23:00,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 04:23:00,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 04:23:00,493 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 04:23:00,494 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 04:23:00,494 INFO L130 BoogieDeclarations]: Found specification of procedure diff [2018-11-10 04:23:00,494 INFO L138 BoogieDeclarations]: Found implementation of procedure diff [2018-11-10 04:23:00,723 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 04:23:00,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 04:23:00 BoogieIcfgContainer [2018-11-10 04:23:00,723 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 04:23:00,724 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 04:23:00,724 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 04:23:00,727 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 04:23:00,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 04:23:00" (1/3) ... [2018-11-10 04:23:00,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@394ea797 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 04:23:00, skipping insertion in model container [2018-11-10 04:23:00,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:23:00" (2/3) ... [2018-11-10 04:23:00,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@394ea797 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 04:23:00, skipping insertion in model container [2018-11-10 04:23:00,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 04:23:00" (3/3) ... [2018-11-10 04:23:00,732 INFO L112 eAbstractionObserver]: Analyzing ICFG diff_usafe_false-valid-deref.i [2018-11-10 04:23:00,741 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 04:23:00,749 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2018-11-10 04:23:00,767 INFO L257 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2018-11-10 04:23:00,796 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 04:23:00,796 INFO L383 AbstractCegarLoop]: Hoare is false [2018-11-10 04:23:00,796 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 04:23:00,796 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 04:23:00,796 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 04:23:00,796 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 04:23:00,797 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 04:23:00,797 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 04:23:00,815 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2018-11-10 04:23:00,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-10 04:23:00,824 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:23:00,825 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:23:00,827 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, diffErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE, diffErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, diffErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, diffErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, diffErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, diffErr7ASSERT_VIOLATIONMEMORY_DEREFERENCE, diffErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE, diffErr6ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2018-11-10 04:23:00,831 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:23:00,832 INFO L82 PathProgramCache]: Analyzing trace with hash -2064196316, now seen corresponding path program 1 times [2018-11-10 04:23:00,834 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 04:23:00,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:23:00,882 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:23:00,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:23:00,882 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 04:23:00,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:23:00,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 04:23:00,954 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:23:00,954 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-10 04:23:00,954 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-10 04:23:00,959 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-10 04:23:00,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-10 04:23:00,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-10 04:23:00,978 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 2 states. [2018-11-10 04:23:00,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:23:00,996 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2018-11-10 04:23:00,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-10 04:23:00,997 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2018-11-10 04:23:00,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:23:01,003 INFO L225 Difference]: With dead ends: 38 [2018-11-10 04:23:01,003 INFO L226 Difference]: Without dead ends: 31 [2018-11-10 04:23:01,005 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-10 04:23:01,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-11-10 04:23:01,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-11-10 04:23:01,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-11-10 04:23:01,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2018-11-10 04:23:01,031 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 13 [2018-11-10 04:23:01,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:23:01,031 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2018-11-10 04:23:01,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-10 04:23:01,031 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2018-11-10 04:23:01,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-10 04:23:01,032 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:23:01,032 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:23:01,032 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, diffErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE, diffErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, diffErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, diffErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, diffErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, diffErr7ASSERT_VIOLATIONMEMORY_DEREFERENCE, diffErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE, diffErr6ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2018-11-10 04:23:01,033 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:23:01,033 INFO L82 PathProgramCache]: Analyzing trace with hash -2111788145, now seen corresponding path program 1 times [2018-11-10 04:23:01,033 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 04:23:01,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:23:01,034 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:23:01,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:23:01,035 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 04:23:01,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 04:23:01,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 04:23:01,093 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-10 04:23:01,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 04:23:01 BoogieIcfgContainer [2018-11-10 04:23:01,115 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-10 04:23:01,116 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 04:23:01,116 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 04:23:01,116 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 04:23:01,116 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 04:23:00" (3/4) ... [2018-11-10 04:23:01,118 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-10 04:23:01,153 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_953d7a09-ab22-49ee-8ff0-24c03060dcbb/bin-2019/utaipan/witness.graphml [2018-11-10 04:23:01,154 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 04:23:01,154 INFO L168 Benchmark]: Toolchain (without parser) took 976.02 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.4 MB). Free memory was 959.2 MB in the beginning and 1.1 GB in the end (delta: -128.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2018-11-10 04:23:01,156 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 04:23:01,156 INFO L168 Benchmark]: CACSL2BoogieTranslator took 164.67 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-10 04:23:01,157 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.07 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-10 04:23:01,157 INFO L168 Benchmark]: Boogie Preprocessor took 20.49 ms. Allocated memory is still 1.0 GB. Free memory is still 945.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 04:23:01,158 INFO L168 Benchmark]: RCFGBuilder took 330.42 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.4 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -172.7 MB). Peak memory consumption was 15.0 MB. Max. memory is 11.5 GB. [2018-11-10 04:23:01,158 INFO L168 Benchmark]: TraceAbstraction took 391.67 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: 27.9 MB). Peak memory consumption was 27.9 MB. Max. memory is 11.5 GB. [2018-11-10 04:23:01,159 INFO L168 Benchmark]: Witness Printer took 37.97 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-10 04:23:01,162 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 164.67 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 27.07 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 20.49 ms. Allocated memory is still 1.0 GB. Free memory is still 945.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 330.42 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.4 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -172.7 MB). Peak memory consumption was 15.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 391.67 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: 27.9 MB). Peak memory consumption was 27.9 MB. Max. memory is 11.5 GB. * Witness Printer took 37.97 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * 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: [L27] int *A; [L28] int Alen = __VERIFIER_nondet_int(); [L29] int *B; [L30] int Blen = __VERIFIER_nondet_int(); [L31] int *D; VAL [Alen=2, Blen=3] [L32] CALL diff(A, Alen, B, Blen, D) [L4] int k = 0; [L5] int i = 0; [L6] int l1 = Alen; [L7] int l2 = Blen; [L8] int found; [L9] COND TRUE i < l1 [L10] int j = 0; [L11] found = 0 [L12] COND TRUE j < l2 && !found [L13] CALL A[i] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 39 locations, 9 error locations. UNSAFE Result, 0.3s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 41 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred 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: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 26 NumberOfCodeBlocks, 26 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 144 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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...