./Ultimate.py --spec ../../sv-benchmarks/c/MemSafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/naturalNumbers1_false-valid-deref.c --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_3e2b8705-fe93-4cd4-a04f-88c0865cb01d/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_3e2b8705-fe93-4cd4-a04f-88c0865cb01d/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_3e2b8705-fe93-4cd4-a04f-88c0865cb01d/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_3e2b8705-fe93-4cd4-a04f-88c0865cb01d/bin-2019/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/naturalNumbers1_false-valid-deref.c -s /tmp/vcloud-vcloud-master/worker/working_dir_3e2b8705-fe93-4cd4-a04f-88c0865cb01d/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_3e2b8705-fe93-4cd4-a04f-88c0865cb01d/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 932f76685ed1816d93a388d0ab1addae9c51483a ......................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-11-10 06:00:36,952 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 06:00:36,954 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 06:00:36,961 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 06:00:36,961 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 06:00:36,962 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 06:00:36,963 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 06:00:36,964 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 06:00:36,965 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 06:00:36,966 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 06:00:36,966 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 06:00:36,967 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 06:00:36,967 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 06:00:36,968 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 06:00:36,969 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 06:00:36,969 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 06:00:36,970 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 06:00:36,971 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 06:00:36,972 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 06:00:36,976 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 06:00:36,977 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 06:00:36,978 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 06:00:36,979 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 06:00:36,979 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 06:00:36,979 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 06:00:36,980 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 06:00:36,981 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 06:00:36,981 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 06:00:36,982 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 06:00:36,982 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 06:00:36,983 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 06:00:36,983 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 06:00:36,983 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 06:00:36,983 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 06:00:36,984 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 06:00:36,984 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 06:00:36,985 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_3e2b8705-fe93-4cd4-a04f-88c0865cb01d/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2018-11-10 06:00:36,995 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 06:00:36,995 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 06:00:36,996 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 06:00:36,996 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-10 06:00:36,996 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-10 06:00:36,996 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-10 06:00:36,996 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-10 06:00:36,996 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-10 06:00:36,997 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-10 06:00:36,997 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-10 06:00:36,997 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-10 06:00:36,997 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-10 06:00:36,998 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-10 06:00:36,998 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 06:00:36,998 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 06:00:36,998 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-10 06:00:36,998 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-10 06:00:36,998 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 06:00:36,998 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 06:00:36,999 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-11-10 06:00:36,999 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-11-10 06:00:36,999 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-11-10 06:00:36,999 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 06:00:36,999 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 06:00:36,999 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 06:00:37,000 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 06:00:37,000 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 06:00:37,000 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 06:00:37,000 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 06:00:37,000 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 06:00:37,000 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 06:00:37,000 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-10 06:00:37,001 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 06:00:37,001 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-10 06:00:37,001 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_3e2b8705-fe93-4cd4-a04f-88c0865cb01d/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 -> 932f76685ed1816d93a388d0ab1addae9c51483a [2018-11-10 06:00:37,024 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 06:00:37,033 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 06:00:37,036 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 06:00:37,037 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 06:00:37,037 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 06:00:37,038 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_3e2b8705-fe93-4cd4-a04f-88c0865cb01d/bin-2019/utaipan/../../sv-benchmarks/c/memsafety-ext3/naturalNumbers1_false-valid-deref.c [2018-11-10 06:00:37,078 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_3e2b8705-fe93-4cd4-a04f-88c0865cb01d/bin-2019/utaipan/data/6d638270d/4abe452948674fc896a37518b04af04f/FLAG91230561b [2018-11-10 06:00:37,473 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 06:00:37,474 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_3e2b8705-fe93-4cd4-a04f-88c0865cb01d/sv-benchmarks/c/memsafety-ext3/naturalNumbers1_false-valid-deref.c [2018-11-10 06:00:37,477 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_3e2b8705-fe93-4cd4-a04f-88c0865cb01d/bin-2019/utaipan/data/6d638270d/4abe452948674fc896a37518b04af04f/FLAG91230561b [2018-11-10 06:00:37,486 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_3e2b8705-fe93-4cd4-a04f-88c0865cb01d/bin-2019/utaipan/data/6d638270d/4abe452948674fc896a37518b04af04f [2018-11-10 06:00:37,488 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 06:00:37,489 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-10 06:00:37,489 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 06:00:37,489 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 06:00:37,491 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 06:00:37,492 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:00:37" (1/1) ... [2018-11-10 06:00:37,493 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d5ab32d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:00:37, skipping insertion in model container [2018-11-10 06:00:37,493 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:00:37" (1/1) ... [2018-11-10 06:00:37,499 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 06:00:37,510 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 06:00:37,607 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 06:00:37,614 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 06:00:37,625 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 06:00:37,635 INFO L193 MainTranslator]: Completed translation [2018-11-10 06:00:37,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:00:37 WrapperNode [2018-11-10 06:00:37,635 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 06:00:37,636 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-10 06:00:37,636 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-10 06:00:37,636 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-10 06:00:37,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:00:37" (1/1) ... [2018-11-10 06:00:37,646 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:00:37" (1/1) ... [2018-11-10 06:00:37,660 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-10 06:00:37,660 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 06:00:37,660 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 06:00:37,660 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 06:00:37,666 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:00:37" (1/1) ... [2018-11-10 06:00:37,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:00:37" (1/1) ... [2018-11-10 06:00:37,668 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:00:37" (1/1) ... [2018-11-10 06:00:37,668 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:00:37" (1/1) ... [2018-11-10 06:00:37,671 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:00:37" (1/1) ... [2018-11-10 06:00:37,674 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:00:37" (1/1) ... [2018-11-10 06:00:37,675 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:00:37" (1/1) ... [2018-11-10 06:00:37,676 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 06:00:37,676 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 06:00:37,676 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 06:00:37,676 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 06:00:37,677 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:00:37" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e2b8705-fe93-4cd4-a04f-88c0865cb01d/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 06:00:37,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 06:00:37,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 06:00:37,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 06:00:37,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 06:00:37,758 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 06:00:37,758 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 06:00:37,758 INFO L130 BoogieDeclarations]: Found specification of procedure areNatural [2018-11-10 06:00:37,758 INFO L138 BoogieDeclarations]: Found implementation of procedure areNatural [2018-11-10 06:00:37,919 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 06:00:37,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 06:00:37 BoogieIcfgContainer [2018-11-10 06:00:37,920 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 06:00:37,920 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 06:00:37,920 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 06:00:37,923 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 06:00:37,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 06:00:37" (1/3) ... [2018-11-10 06:00:37,924 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d87d814 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:00:37, skipping insertion in model container [2018-11-10 06:00:37,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:00:37" (2/3) ... [2018-11-10 06:00:37,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d87d814 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:00:37, skipping insertion in model container [2018-11-10 06:00:37,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 06:00:37" (3/3) ... [2018-11-10 06:00:37,926 INFO L112 eAbstractionObserver]: Analyzing ICFG naturalNumbers1_false-valid-deref.c [2018-11-10 06:00:37,935 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 06:00:37,945 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-11-10 06:00:37,960 INFO L257 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2018-11-10 06:00:37,982 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 06:00:37,983 INFO L383 AbstractCegarLoop]: Hoare is false [2018-11-10 06:00:37,983 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 06:00:37,983 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 06:00:37,983 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 06:00:37,983 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 06:00:37,983 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 06:00:37,983 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 06:00:37,996 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2018-11-10 06:00:38,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-10 06:00:38,005 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:00:38,005 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:00:38,007 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, areNaturalErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, areNaturalErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2018-11-10 06:00:38,012 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:00:38,012 INFO L82 PathProgramCache]: Analyzing trace with hash 287556777, now seen corresponding path program 1 times [2018-11-10 06:00:38,014 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 06:00:38,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:00:38,055 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:00:38,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:00:38,055 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 06:00:38,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:00:38,181 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 06:00:38,182 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 06:00:38,182 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-10 06:00:38,182 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-10 06:00:38,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 06:00:38,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 06:00:38,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-10 06:00:38,195 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 6 states. [2018-11-10 06:00:38,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:00:38,303 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2018-11-10 06:00:38,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-10 06:00:38,304 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2018-11-10 06:00:38,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:00:38,311 INFO L225 Difference]: With dead ends: 28 [2018-11-10 06:00:38,311 INFO L226 Difference]: Without dead ends: 25 [2018-11-10 06:00:38,312 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-10 06:00:38,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-11-10 06:00:38,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2018-11-10 06:00:38,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-11-10 06:00:38,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-11-10 06:00:38,335 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 11 [2018-11-10 06:00:38,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:00:38,336 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-11-10 06:00:38,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 06:00:38,336 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-11-10 06:00:38,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-11-10 06:00:38,336 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:00:38,337 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:00:38,337 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, areNaturalErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, areNaturalErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2018-11-10 06:00:38,337 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:00:38,337 INFO L82 PathProgramCache]: Analyzing trace with hash 324325549, now seen corresponding path program 1 times [2018-11-10 06:00:38,337 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 06:00:38,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:00:38,338 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:00:38,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:00:38,339 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 06:00:38,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:00:38,447 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 06:00:38,448 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 06:00:38,448 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-10 06:00:38,448 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-10 06:00:38,449 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 06:00:38,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 06:00:38,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-10 06:00:38,450 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 6 states. [2018-11-10 06:00:38,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:00:38,572 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2018-11-10 06:00:38,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-10 06:00:38,572 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2018-11-10 06:00:38,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:00:38,573 INFO L225 Difference]: With dead ends: 32 [2018-11-10 06:00:38,573 INFO L226 Difference]: Without dead ends: 32 [2018-11-10 06:00:38,574 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-11-10 06:00:38,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-10 06:00:38,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2018-11-10 06:00:38,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-10 06:00:38,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-11-10 06:00:38,578 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 12 [2018-11-10 06:00:38,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:00:38,578 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-11-10 06:00:38,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 06:00:38,578 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-11-10 06:00:38,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-10 06:00:38,578 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:00:38,578 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:00:38,579 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, areNaturalErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, areNaturalErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2018-11-10 06:00:38,579 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:00:38,579 INFO L82 PathProgramCache]: Analyzing trace with hash -73106891, now seen corresponding path program 1 times [2018-11-10 06:00:38,579 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 06:00:38,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:00:38,580 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:00:38,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:00:38,580 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 06:00:38,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:00:38,631 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 06:00:38,631 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 06:00:38,631 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-10 06:00:38,632 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-10 06:00:38,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 06:00:38,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 06:00:38,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 06:00:38,632 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 4 states. [2018-11-10 06:00:38,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:00:38,655 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2018-11-10 06:00:38,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-10 06:00:38,656 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2018-11-10 06:00:38,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:00:38,656 INFO L225 Difference]: With dead ends: 23 [2018-11-10 06:00:38,656 INFO L226 Difference]: Without dead ends: 18 [2018-11-10 06:00:38,657 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-10 06:00:38,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-10 06:00:38,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-10 06:00:38,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-10 06:00:38,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-11-10 06:00:38,659 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 17 [2018-11-10 06:00:38,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:00:38,659 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-11-10 06:00:38,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 06:00:38,660 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-11-10 06:00:38,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-10 06:00:38,660 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:00:38,660 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:00:38,660 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, areNaturalErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, areNaturalErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2018-11-10 06:00:38,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:00:38,661 INFO L82 PathProgramCache]: Analyzing trace with hash -72767179, now seen corresponding path program 1 times [2018-11-10 06:00:38,661 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 06:00:38,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:00:38,662 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:00:38,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:00:38,662 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 06:00:38,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:00:38,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 06:00:38,783 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:00:38,783 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 06:00:38,784 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 18 with the following transitions: [2018-11-10 06:00:38,785 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [10], [14], [20], [22], [23], [24], [28], [34], [35], [36], [38] [2018-11-10 06:00:38,816 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-11-10 06:00:38,816 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-10 06:00:39,198 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-10 06:00:39,199 INFO L272 AbstractInterpreter]: Visited 14 different actions 74 times. Merged at 6 different actions 60 times. Widened at 1 different actions 6 times. Found 1 fixpoints after 1 different actions. Largest state had 22 variables. [2018-11-10 06:00:39,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:00:39,204 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-10 06:00:39,205 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:00:39,205 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3e2b8705-fe93-4cd4-a04f-88c0865cb01d/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 06:00:39,210 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:00:39,210 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-10 06:00:39,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:00:39,234 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:00:39,261 INFO L477 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 [2018-11-10 06:00:39,262 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-11-10 06:00:39,269 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-10 06:00:39,269 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:9 [2018-11-10 06:00:39,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 06:00:39,362 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 06:00:39,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 06:00:39,471 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 06:00:39,471 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2018-11-10 06:00:39,471 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 06:00:39,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-10 06:00:39,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-10 06:00:39,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2018-11-10 06:00:39,472 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 13 states. [2018-11-10 06:00:39,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:00:39,606 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-11-10 06:00:39,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-10 06:00:39,607 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2018-11-10 06:00:39,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:00:39,608 INFO L225 Difference]: With dead ends: 26 [2018-11-10 06:00:39,608 INFO L226 Difference]: Without dead ends: 26 [2018-11-10 06:00:39,608 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2018-11-10 06:00:39,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-11-10 06:00:39,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2018-11-10 06:00:39,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-10 06:00:39,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-11-10 06:00:39,611 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 17 [2018-11-10 06:00:39,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:00:39,612 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-11-10 06:00:39,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-10 06:00:39,612 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-11-10 06:00:39,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-11-10 06:00:39,612 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:00:39,613 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:00:39,613 INFO L424 AbstractCegarLoop]: === Iteration 5 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, areNaturalErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, areNaturalErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2018-11-10 06:00:39,613 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:00:39,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1498487379, now seen corresponding path program 2 times [2018-11-10 06:00:39,613 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 06:00:39,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:00:39,614 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:00:39,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:00:39,615 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 06:00:39,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:00:39,776 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-10 06:00:39,777 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 06:00:39,777 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-11-10 06:00:39,777 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-10 06:00:39,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-10 06:00:39,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-10 06:00:39,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-10 06:00:39,778 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 7 states. [2018-11-10 06:00:39,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:00:39,823 INFO L93 Difference]: Finished difference Result 13 states and 12 transitions. [2018-11-10 06:00:39,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-10 06:00:39,824 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2018-11-10 06:00:39,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:00:39,824 INFO L225 Difference]: With dead ends: 13 [2018-11-10 06:00:39,824 INFO L226 Difference]: Without dead ends: 0 [2018-11-10 06:00:39,824 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-11-10 06:00:39,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-10 06:00:39,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-10 06:00:39,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-10 06:00:39,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-10 06:00:39,825 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2018-11-10 06:00:39,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:00:39,825 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-10 06:00:39,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-10 06:00:39,825 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-10 06:00:39,825 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-10 06:00:39,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 06:00:39 BoogieIcfgContainer [2018-11-10 06:00:39,829 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-10 06:00:39,829 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 06:00:39,829 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 06:00:39,829 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 06:00:39,830 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 06:00:37" (3/4) ... [2018-11-10 06:00:39,832 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-10 06:00:39,836 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-10 06:00:39,836 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-10 06:00:39,836 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure areNatural [2018-11-10 06:00:39,840 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 40 nodes and edges [2018-11-10 06:00:39,840 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2018-11-10 06:00:39,840 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2018-11-10 06:00:39,841 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-10 06:00:39,874 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_3e2b8705-fe93-4cd4-a04f-88c0865cb01d/bin-2019/utaipan/witness.graphml [2018-11-10 06:00:39,874 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 06:00:39,875 INFO L168 Benchmark]: Toolchain (without parser) took 2387.00 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 210.8 MB). Free memory was 959.2 MB in the beginning and 1.2 GB in the end (delta: -216.3 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 06:00:39,877 INFO L168 Benchmark]: CDTParser took 0.11 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 06:00:39,877 INFO L168 Benchmark]: CACSL2BoogieTranslator took 146.74 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 06:00:39,877 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.12 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 06:00:39,878 INFO L168 Benchmark]: Boogie Preprocessor took 15.48 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 06:00:39,878 INFO L168 Benchmark]: RCFGBuilder took 243.76 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.5 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -163.6 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. [2018-11-10 06:00:39,878 INFO L168 Benchmark]: TraceAbstraction took 1908.52 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 80.2 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -75.0 MB). Peak memory consumption was 5.2 MB. Max. memory is 11.5 GB. [2018-11-10 06:00:39,879 INFO L168 Benchmark]: Witness Printer took 45.53 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 5.5 MB). Peak memory consumption was 5.5 MB. Max. memory is 11.5 GB. [2018-11-10 06:00:39,883 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 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 146.74 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 24.12 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 15.48 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 243.76 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.5 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -163.6 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1908.52 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 80.2 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -75.0 MB). Peak memory consumption was 5.2 MB. Max. memory is 11.5 GB. * Witness Printer took 45.53 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 5.5 MB). Peak memory consumption was 5.5 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 3 error locations. SAFE Result, 1.8s OverallTime, 5 OverallIterations, 3 TraceHistogramMax, 0.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 70 SDtfs, 128 SDslu, 159 SDs, 0 SdLazy, 180 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.4s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 16 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 96 NumberOfCodeBlocks, 96 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 106 ConstructedInterpolants, 0 QuantifiedInterpolants, 11386 SizeOfPredicates, 9 NumberOfNonLiveVariables, 96 ConjunctsInSsa, 26 ConjunctsInUnsatCore, 7 InterpolantComputations, 4 PerfectInterpolantSequences, 13/25 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...