./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/count_down_unsafe_false-valid-deref.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_72866f50-8217-4a8f-b07b-2b147920df5f/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_72866f50-8217-4a8f-b07b-2b147920df5f/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_72866f50-8217-4a8f-b07b-2b147920df5f/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_72866f50-8217-4a8f-b07b-2b147920df5f/bin-2019/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/count_down_unsafe_false-valid-deref.i -s /tmp/vcloud-vcloud-master/worker/working_dir_72866f50-8217-4a8f-b07b-2b147920df5f/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_72866f50-8217-4a8f-b07b-2b147920df5f/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 71c9f2b0d8bf95458c9b099304dfb78f8cadcf0a ................................................................................................................................................................................................................................................................................................................................... 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 0.1.23-635dfa2 [2018-12-09 12:19:49,402 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 12:19:49,403 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 12:19:49,409 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 12:19:49,409 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 12:19:49,410 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 12:19:49,411 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 12:19:49,412 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 12:19:49,412 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 12:19:49,413 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 12:19:49,413 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 12:19:49,413 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 12:19:49,414 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 12:19:49,414 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 12:19:49,415 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 12:19:49,415 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 12:19:49,416 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 12:19:49,417 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 12:19:49,417 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 12:19:49,418 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 12:19:49,419 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 12:19:49,419 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 12:19:49,420 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 12:19:49,421 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 12:19:49,421 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 12:19:49,421 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 12:19:49,422 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 12:19:49,422 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 12:19:49,422 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 12:19:49,423 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 12:19:49,423 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 12:19:49,423 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 12:19:49,423 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 12:19:49,424 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 12:19:49,424 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 12:19:49,424 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 12:19:49,424 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_72866f50-8217-4a8f-b07b-2b147920df5f/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2018-12-09 12:19:49,432 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 12:19:49,432 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 12:19:49,433 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-09 12:19:49,433 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-09 12:19:49,433 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-09 12:19:49,433 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-09 12:19:49,433 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-09 12:19:49,433 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-09 12:19:49,433 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-09 12:19:49,433 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-09 12:19:49,433 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-09 12:19:49,433 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-09 12:19:49,434 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-09 12:19:49,434 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-09 12:19:49,434 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-09 12:19:49,434 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 12:19:49,434 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-09 12:19:49,434 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-09 12:19:49,434 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-09 12:19:49,435 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-09 12:19:49,435 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 12:19:49,435 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-12-09 12:19:49,435 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-12-09 12:19:49,435 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-12-09 12:19:49,435 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-09 12:19:49,435 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-09 12:19:49,435 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 12:19:49,435 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 12:19:49,435 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-09 12:19:49,435 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-09 12:19:49,436 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 12:19:49,436 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 12:19:49,436 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-09 12:19:49,436 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-09 12:19:49,436 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-09 12:19:49,436 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-09 12:19:49,436 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_72866f50-8217-4a8f-b07b-2b147920df5f/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 -> 71c9f2b0d8bf95458c9b099304dfb78f8cadcf0a [2018-12-09 12:19:49,453 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 12:19:49,460 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 12:19:49,462 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 12:19:49,463 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 12:19:49,463 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 12:19:49,463 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_72866f50-8217-4a8f-b07b-2b147920df5f/bin-2019/utaipan/../../sv-benchmarks/c/array-memsafety/count_down_unsafe_false-valid-deref.i [2018-12-09 12:19:49,496 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_72866f50-8217-4a8f-b07b-2b147920df5f/bin-2019/utaipan/data/4b3d5bd20/718b9e6d0dae4de89e2764c6d315e388/FLAG7cd9eeb64 [2018-12-09 12:19:49,980 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 12:19:49,981 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_72866f50-8217-4a8f-b07b-2b147920df5f/sv-benchmarks/c/array-memsafety/count_down_unsafe_false-valid-deref.i [2018-12-09 12:19:49,987 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_72866f50-8217-4a8f-b07b-2b147920df5f/bin-2019/utaipan/data/4b3d5bd20/718b9e6d0dae4de89e2764c6d315e388/FLAG7cd9eeb64 [2018-12-09 12:19:49,995 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_72866f50-8217-4a8f-b07b-2b147920df5f/bin-2019/utaipan/data/4b3d5bd20/718b9e6d0dae4de89e2764c6d315e388 [2018-12-09 12:19:49,996 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 12:19:49,997 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 12:19:49,998 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 12:19:49,998 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 12:19:50,000 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 12:19:50,000 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:19:49" (1/1) ... [2018-12-09 12:19:50,002 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68649384 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:19:50, skipping insertion in model container [2018-12-09 12:19:50,002 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:19:49" (1/1) ... [2018-12-09 12:19:50,006 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 12:19:50,023 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 12:19:50,160 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 12:19:50,166 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 12:19:50,222 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 12:19:50,245 INFO L195 MainTranslator]: Completed translation [2018-12-09 12:19:50,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:19:50 WrapperNode [2018-12-09 12:19:50,245 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 12:19:50,246 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 12:19:50,246 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 12:19:50,246 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 12:19:50,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:19:50" (1/1) ... [2018-12-09 12:19:50,259 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:19:50" (1/1) ... [2018-12-09 12:19:50,263 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 12:19:50,264 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 12:19:50,264 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 12:19:50,264 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 12:19:50,269 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:19:50" (1/1) ... [2018-12-09 12:19:50,269 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:19:50" (1/1) ... [2018-12-09 12:19:50,271 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:19:50" (1/1) ... [2018-12-09 12:19:50,271 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:19:50" (1/1) ... [2018-12-09 12:19:50,275 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:19:50" (1/1) ... [2018-12-09 12:19:50,278 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:19:50" (1/1) ... [2018-12-09 12:19:50,279 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:19:50" (1/1) ... [2018-12-09 12:19:50,280 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 12:19:50,280 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 12:19:50,281 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 12:19:50,281 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 12:19:50,281 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:19:50" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_72866f50-8217-4a8f-b07b-2b147920df5f/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 [2018-12-09 12:19:50,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-09 12:19:50,312 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-12-09 12:19:50,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-12-09 12:19:50,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-09 12:19:50,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-09 12:19:50,312 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-09 12:19:50,312 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-09 12:19:50,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-09 12:19:50,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 12:19:50,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 12:19:50,447 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 12:19:50,447 INFO L280 CfgBuilder]: Removed 3 assue(true) statements. [2018-12-09 12:19:50,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:19:50 BoogieIcfgContainer [2018-12-09 12:19:50,447 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 12:19:50,448 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 12:19:50,448 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 12:19:50,450 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 12:19:50,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 12:19:49" (1/3) ... [2018-12-09 12:19:50,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27033ac3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:19:50, skipping insertion in model container [2018-12-09 12:19:50,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:19:50" (2/3) ... [2018-12-09 12:19:50,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27033ac3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:19:50, skipping insertion in model container [2018-12-09 12:19:50,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:19:50" (3/3) ... [2018-12-09 12:19:50,452 INFO L112 eAbstractionObserver]: Analyzing ICFG count_down_unsafe_false-valid-deref.i [2018-12-09 12:19:50,458 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 12:19:50,462 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2018-12-09 12:19:50,472 INFO L257 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2018-12-09 12:19:50,488 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 12:19:50,488 INFO L383 AbstractCegarLoop]: Hoare is false [2018-12-09 12:19:50,488 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 12:19:50,488 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 12:19:50,488 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 12:19:50,488 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 12:19:50,488 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 12:19:50,488 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 12:19:50,497 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2018-12-09 12:19:50,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-09 12:19:50,504 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:19:50,504 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:19:50,506 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-12-09 12:19:50,509 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:19:50,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1191221624, now seen corresponding path program 1 times [2018-12-09 12:19:50,511 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 12:19:50,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:19:50,539 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 12:19:50,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:19:50,539 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 12:19:50,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:19:50,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 12:19:50,602 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 12:19:50,602 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-09 12:19:50,602 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 12:19:50,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-09 12:19:50,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-09 12:19:50,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 12:19:50,614 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2018-12-09 12:19:50,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 12:19:50,642 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2018-12-09 12:19:50,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-09 12:19:50,644 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-12-09 12:19:50,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 12:19:50,649 INFO L225 Difference]: With dead ends: 36 [2018-12-09 12:19:50,649 INFO L226 Difference]: Without dead ends: 33 [2018-12-09 12:19:50,650 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 12:19:50,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-12-09 12:19:50,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-12-09 12:19:50,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-12-09 12:19:50,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2018-12-09 12:19:50,671 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 10 [2018-12-09 12:19:50,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 12:19:50,671 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2018-12-09 12:19:50,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-09 12:19:50,671 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2018-12-09 12:19:50,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-12-09 12:19:50,671 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:19:50,671 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:19:50,672 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-12-09 12:19:50,672 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:19:50,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1992307641, now seen corresponding path program 1 times [2018-12-09 12:19:50,672 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 12:19:50,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:19:50,673 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 12:19:50,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:19:50,673 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 12:19:50,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:19:50,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 12:19:50,694 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 12:19:50,694 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-09 12:19:50,694 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 12:19:50,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-09 12:19:50,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-09 12:19:50,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 12:19:50,695 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 3 states. [2018-12-09 12:19:50,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 12:19:50,717 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2018-12-09 12:19:50,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-09 12:19:50,718 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2018-12-09 12:19:50,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 12:19:50,718 INFO L225 Difference]: With dead ends: 29 [2018-12-09 12:19:50,719 INFO L226 Difference]: Without dead ends: 29 [2018-12-09 12:19:50,719 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 12:19:50,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-12-09 12:19:50,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-12-09 12:19:50,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-12-09 12:19:50,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2018-12-09 12:19:50,722 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 12 [2018-12-09 12:19:50,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 12:19:50,723 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2018-12-09 12:19:50,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-09 12:19:50,723 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2018-12-09 12:19:50,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-12-09 12:19:50,723 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:19:50,723 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:19:50,724 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2018-12-09 12:19:50,724 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:19:50,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1992307640, now seen corresponding path program 1 times [2018-12-09 12:19:50,724 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 12:19:50,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:19:50,725 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 12:19:50,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:19:50,725 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 12:19:50,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 12:19:50,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 12:19:50,761 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-09 12:19:50,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 12:19:50 BoogieIcfgContainer [2018-12-09 12:19:50,775 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-09 12:19:50,775 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 12:19:50,775 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 12:19:50,775 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 12:19:50,775 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:19:50" (3/4) ... [2018-12-09 12:19:50,776 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-09 12:19:50,801 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_72866f50-8217-4a8f-b07b-2b147920df5f/bin-2019/utaipan/witness.graphml [2018-12-09 12:19:50,801 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 12:19:50,801 INFO L168 Benchmark]: Toolchain (without parser) took 804.48 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 154.1 MB). Free memory was 952.4 MB in the beginning and 1.1 GB in the end (delta: -116.9 MB). Peak memory consumption was 37.2 MB. Max. memory is 11.5 GB. [2018-12-09 12:19:50,802 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 12:19:50,802 INFO L168 Benchmark]: CACSL2BoogieTranslator took 247.62 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 154.1 MB). Free memory was 952.4 MB in the beginning and 1.1 GB in the end (delta: -186.4 MB). Peak memory consumption was 24.9 MB. Max. memory is 11.5 GB. [2018-12-09 12:19:50,803 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.86 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 12:19:50,803 INFO L168 Benchmark]: Boogie Preprocessor took 16.54 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 12:19:50,803 INFO L168 Benchmark]: RCFGBuilder took 166.97 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.6 MB). Peak memory consumption was 24.6 MB. Max. memory is 11.5 GB. [2018-12-09 12:19:50,803 INFO L168 Benchmark]: TraceAbstraction took 326.67 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 44.9 MB). Peak memory consumption was 44.9 MB. Max. memory is 11.5 GB. [2018-12-09 12:19:50,804 INFO L168 Benchmark]: Witness Printer took 26.11 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 12:19:50,806 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 247.62 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 154.1 MB). Free memory was 952.4 MB in the beginning and 1.1 GB in the end (delta: -186.4 MB). Peak memory consumption was 24.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 17.86 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.54 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 166.97 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.6 MB). Peak memory consumption was 24.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 326.67 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 44.9 MB). Peak memory consumption was 44.9 MB. Max. memory is 11.5 GB. * Witness Printer took 26.11 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 552]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L541] int i, j; [L542] int val; [L543] int length = __VERIFIER_nondet_int(); [L544] COND TRUE length < 1 [L544] length = 1 VAL [length=1] [L545] int *arr = __builtin_alloca (length); VAL [__builtin_alloca (length)={3:0}, arr={3:0}, length=1] [L546] COND FALSE !(!arr) [L547] i=0 VAL [__builtin_alloca (length)={3:0}, arr={3:0}, i=0, length=1] [L547] COND TRUE i