./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 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_eb4c5d7f-a2b2-4d16-bac3-e4bd41378ed6/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_eb4c5d7f-a2b2-4d16-bac3-e4bd41378ed6/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_eb4c5d7f-a2b2-4d16-bac3-e4bd41378ed6/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_eb4c5d7f-a2b2-4d16-bac3-e4bd41378ed6/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_eb4c5d7f-a2b2-4d16-bac3-e4bd41378ed6/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_eb4c5d7f-a2b2-4d16-bac3-e4bd41378ed6/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 0.1.23-5842f4b [2018-11-18 10:02:49,469 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 10:02:49,470 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 10:02:49,478 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 10:02:49,478 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 10:02:49,479 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 10:02:49,479 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 10:02:49,480 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 10:02:49,481 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 10:02:49,481 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 10:02:49,482 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 10:02:49,482 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 10:02:49,483 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 10:02:49,483 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 10:02:49,484 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 10:02:49,484 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 10:02:49,485 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 10:02:49,486 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 10:02:49,487 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 10:02:49,488 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 10:02:49,489 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 10:02:49,489 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 10:02:49,490 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 10:02:49,491 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 10:02:49,491 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 10:02:49,491 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 10:02:49,492 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 10:02:49,492 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 10:02:49,492 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 10:02:49,493 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 10:02:49,493 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 10:02:49,494 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 10:02:49,494 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 10:02:49,494 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 10:02:49,494 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 10:02:49,495 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 10:02:49,495 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_eb4c5d7f-a2b2-4d16-bac3-e4bd41378ed6/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2018-11-18 10:02:49,502 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 10:02:49,502 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 10:02:49,503 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 10:02:49,503 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 10:02:49,503 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 10:02:49,503 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 10:02:49,504 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 10:02:49,504 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-18 10:02:49,504 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 10:02:49,504 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 10:02:49,504 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-18 10:02:49,504 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-18 10:02:49,504 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 10:02:49,505 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 10:02:49,505 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 10:02:49,505 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 10:02:49,505 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 10:02:49,505 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-18 10:02:49,506 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 10:02:49,506 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 10:02:49,506 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 10:02:49,506 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-11-18 10:02:49,506 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-11-18 10:02:49,506 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-11-18 10:02:49,506 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 10:02:49,506 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 10:02:49,507 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 10:02:49,507 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 10:02:49,507 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 10:02:49,507 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 10:02:49,507 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 10:02:49,507 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 10:02:49,507 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 10:02:49,508 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 10:02:49,508 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-18 10:02:49,508 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 10:02:49,508 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 10:02:49,508 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_eb4c5d7f-a2b2-4d16-bac3-e4bd41378ed6/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 [2018-11-18 10:02:49,531 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 10:02:49,540 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 10:02:49,543 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 10:02:49,544 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 10:02:49,544 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 10:02:49,545 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_eb4c5d7f-a2b2-4d16-bac3-e4bd41378ed6/bin-2019/utaipan/../../sv-benchmarks/c/array-memsafety/diff_usafe_false-valid-deref.i [2018-11-18 10:02:49,581 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_eb4c5d7f-a2b2-4d16-bac3-e4bd41378ed6/bin-2019/utaipan/data/9aa04347e/458652af02804c5c8edfcc63d5221904/FLAGce7a49c39 [2018-11-18 10:02:49,980 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 10:02:49,981 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_eb4c5d7f-a2b2-4d16-bac3-e4bd41378ed6/sv-benchmarks/c/array-memsafety/diff_usafe_false-valid-deref.i [2018-11-18 10:02:49,985 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_eb4c5d7f-a2b2-4d16-bac3-e4bd41378ed6/bin-2019/utaipan/data/9aa04347e/458652af02804c5c8edfcc63d5221904/FLAGce7a49c39 [2018-11-18 10:02:50,000 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_eb4c5d7f-a2b2-4d16-bac3-e4bd41378ed6/bin-2019/utaipan/data/9aa04347e/458652af02804c5c8edfcc63d5221904 [2018-11-18 10:02:50,002 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 10:02:50,003 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 10:02:50,004 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 10:02:50,004 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 10:02:50,006 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 10:02:50,006 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 10:02:50" (1/1) ... [2018-11-18 10:02:50,008 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16997479 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:02:50, skipping insertion in model container [2018-11-18 10:02:50,008 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 10:02:50" (1/1) ... [2018-11-18 10:02:50,016 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 10:02:50,031 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 10:02:50,133 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 10:02:50,139 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 10:02:50,149 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 10:02:50,157 INFO L195 MainTranslator]: Completed translation [2018-11-18 10:02:50,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:02:50 WrapperNode [2018-11-18 10:02:50,158 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 10:02:50,158 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 10:02:50,158 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 10:02:50,158 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 10:02:50,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:02:50" (1/1) ... [2018-11-18 10:02:50,170 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:02:50" (1/1) ... [2018-11-18 10:02:50,174 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 10:02:50,175 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 10:02:50,175 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 10:02:50,175 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 10:02:50,180 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:02:50" (1/1) ... [2018-11-18 10:02:50,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:02:50" (1/1) ... [2018-11-18 10:02:50,182 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:02:50" (1/1) ... [2018-11-18 10:02:50,182 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:02:50" (1/1) ... [2018-11-18 10:02:50,187 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:02:50" (1/1) ... [2018-11-18 10:02:50,191 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:02:50" (1/1) ... [2018-11-18 10:02:50,192 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:02:50" (1/1) ... [2018-11-18 10:02:50,194 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 10:02:50,194 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 10:02:50,194 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 10:02:50,194 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 10:02:50,195 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:02:50" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eb4c5d7f-a2b2-4d16-bac3-e4bd41378ed6/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 [2018-11-18 10:02:50,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-11-18 10:02:50,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 10:02:50,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 10:02:50,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 10:02:50,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 10:02:50,274 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-11-18 10:02:50,274 INFO L130 BoogieDeclarations]: Found specification of procedure diff [2018-11-18 10:02:50,274 INFO L138 BoogieDeclarations]: Found implementation of procedure diff [2018-11-18 10:02:50,274 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 10:02:50,274 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 10:02:50,446 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 10:02:50,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 10:02:50 BoogieIcfgContainer [2018-11-18 10:02:50,446 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 10:02:50,447 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 10:02:50,447 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 10:02:50,450 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 10:02:50,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 10:02:50" (1/3) ... [2018-11-18 10:02:50,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@760d40ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 10:02:50, skipping insertion in model container [2018-11-18 10:02:50,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:02:50" (2/3) ... [2018-11-18 10:02:50,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@760d40ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 10:02:50, skipping insertion in model container [2018-11-18 10:02:50,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 10:02:50" (3/3) ... [2018-11-18 10:02:50,453 INFO L112 eAbstractionObserver]: Analyzing ICFG diff_usafe_false-valid-deref.i [2018-11-18 10:02:50,461 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 10:02:50,468 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2018-11-18 10:02:50,482 INFO L257 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2018-11-18 10:02:50,507 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 10:02:50,507 INFO L383 AbstractCegarLoop]: Hoare is false [2018-11-18 10:02:50,507 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 10:02:50,507 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 10:02:50,508 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 10:02:50,508 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 10:02:50,508 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 10:02:50,508 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 10:02:50,521 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2018-11-18 10:02:50,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-18 10:02:50,529 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:02:50,530 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:02:50,532 INFO L423 AbstractCegarLoop]: === Iteration 1 === [diffErr2REQUIRES_VIOLATION, diffErr7REQUIRES_VIOLATION, diffErr6REQUIRES_VIOLATION, diffErr1REQUIRES_VIOLATION, diffErr0REQUIRES_VIOLATION, diffErr5REQUIRES_VIOLATION, diffErr3REQUIRES_VIOLATION, diffErr4REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-11-18 10:02:50,536 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:02:50,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1637109738, now seen corresponding path program 1 times [2018-11-18 10:02:50,539 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:02:50,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:02:50,573 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:02:50,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:02:50,573 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:02:50,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:02:50,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 10:02:50,641 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 10:02:50,641 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 10:02:50,642 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 10:02:50,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-18 10:02:50,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-18 10:02:50,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 10:02:50,654 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 2 states. [2018-11-18 10:02:50,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:02:50,665 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2018-11-18 10:02:50,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-18 10:02:50,666 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2018-11-18 10:02:50,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:02:50,671 INFO L225 Difference]: With dead ends: 35 [2018-11-18 10:02:50,671 INFO L226 Difference]: Without dead ends: 28 [2018-11-18 10:02:50,672 INFO L604 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 [2018-11-18 10:02:50,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-11-18 10:02:50,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-11-18 10:02:50,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-18 10:02:50,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2018-11-18 10:02:50,696 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 13 [2018-11-18 10:02:50,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:02:50,696 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2018-11-18 10:02:50,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-18 10:02:50,696 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2018-11-18 10:02:50,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-18 10:02:50,697 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:02:50,697 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:02:50,697 INFO L423 AbstractCegarLoop]: === Iteration 2 === [diffErr2REQUIRES_VIOLATION, diffErr7REQUIRES_VIOLATION, diffErr6REQUIRES_VIOLATION, diffErr1REQUIRES_VIOLATION, diffErr0REQUIRES_VIOLATION, diffErr5REQUIRES_VIOLATION, diffErr3REQUIRES_VIOLATION, diffErr4REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-11-18 10:02:50,697 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:02:50,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1592374036, now seen corresponding path program 1 times [2018-11-18 10:02:50,698 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:02:50,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:02:50,699 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:02:50,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:02:50,699 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:02:50,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 10:02:50,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 10:02:50,747 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-18 10:02:50,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 10:02:50 BoogieIcfgContainer [2018-11-18 10:02:50,766 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 10:02:50,766 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 10:02:50,767 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 10:02:50,767 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 10:02:50,767 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 10:02:50" (3/4) ... [2018-11-18 10:02:50,769 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-18 10:02:50,796 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_eb4c5d7f-a2b2-4d16-bac3-e4bd41378ed6/bin-2019/utaipan/witness.graphml [2018-11-18 10:02:50,797 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 10:02:50,797 INFO L168 Benchmark]: Toolchain (without parser) took 794.47 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.2 MB). Free memory was 959.2 MB in the beginning and 1.1 GB in the end (delta: -120.4 MB). Peak memory consumption was 13.8 MB. Max. memory is 11.5 GB. [2018-11-18 10:02:50,798 INFO L168 Benchmark]: CDTParser took 0.15 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. [2018-11-18 10:02:50,798 INFO L168 Benchmark]: CACSL2BoogieTranslator took 154.23 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. [2018-11-18 10:02:50,799 INFO L168 Benchmark]: Boogie Procedure Inliner took 16.36 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. [2018-11-18 10:02:50,799 INFO L168 Benchmark]: Boogie Preprocessor took 19.50 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. [2018-11-18 10:02:50,800 INFO L168 Benchmark]: RCFGBuilder took 252.19 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.2 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -168.8 MB). Peak memory consumption was 14.5 MB. Max. memory is 11.5 GB. [2018-11-18 10:02:50,801 INFO L168 Benchmark]: TraceAbstraction took 319.20 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: 32.2 MB). Peak memory consumption was 32.2 MB. Max. memory is 11.5 GB. [2018-11-18 10:02:50,801 INFO L168 Benchmark]: Witness Printer took 30.17 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. [2018-11-18 10:02:50,805 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 154.23 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 16.36 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 19.50 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 252.19 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.2 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -168.8 MB). Peak memory consumption was 14.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 319.20 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: 32.2 MB). Peak memory consumption was 32.2 MB. Max. memory is 11.5 GB. * Witness Printer took 30.17 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: 13]: 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) VAL [\old(Alen)=2, \old(Blen)=3, A={11:7}, B={8:10}, D={5:9}] [L4] int k = 0; [L5] int i = 0; [L6] int l1 = Alen; [L7] int l2 = Blen; [L8] int found; VAL [\old(Alen)=2, \old(Blen)=3, A={11:7}, A={11:7}, Alen=2, B={8:10}, B={8:10}, Blen=3, D={5:9}, D={5:9}, i=0, k=0, l1=2, l2=3] [L9] COND TRUE i < l1 [L10] int j = 0; [L11] found = 0 VAL [\old(Alen)=2, \old(Blen)=3, A={11:7}, A={11:7}, Alen=2, B={8:10}, B={8:10}, Blen=3, D={5:9}, D={5:9}, found=0, i=0, j=0, k=0, l1=2, l2=3] [L12] COND TRUE j < l2 && !found VAL [\old(Alen)=2, \old(Blen)=3, A={11:7}, A={11:7}, Alen=2, B={8:10}, B={8:10}, Blen=3, D={5:9}, D={5:9}, found=0, i=0, j=0, k=0, l1=2, l2=3] [L13] FCALL A[i] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 36 locations, 9 error locations. UNSAFE Result, 0.2s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 38 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=36occurred 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...