./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/loops/invert_string-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_92f7d4e7-e3da-4cc2-a494-7e66ecc62f11/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_92f7d4e7-e3da-4cc2-a494-7e66ecc62f11/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_92f7d4e7-e3da-4cc2-a494-7e66ecc62f11/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_92f7d4e7-e3da-4cc2-a494-7e66ecc62f11/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/loops/invert_string-2.c -s /tmp/vcloud-vcloud-master/worker/working_dir_92f7d4e7-e3da-4cc2-a494-7e66ecc62f11/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_92f7d4e7-e3da-4cc2-a494-7e66ecc62f11/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 01c8dcbf548ac0eef8cebe655947adbb13d26f9a ...................................................................................................................................................................................................................................................................................................................... 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 0.1.24-cad4683 [2019-10-22 11:25:54,277 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:25:54,278 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:25:54,287 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:25:54,287 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:25:54,288 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:25:54,289 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:25:54,290 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:25:54,292 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:25:54,292 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:25:54,293 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:25:54,294 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:25:54,294 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:25:54,295 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:25:54,296 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:25:54,297 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:25:54,297 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:25:54,298 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:25:54,299 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:25:54,301 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:25:54,302 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:25:54,303 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:25:54,304 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:25:54,305 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:25:54,307 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:25:54,308 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:25:54,308 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:25:54,309 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:25:54,309 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:25:54,310 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:25:54,310 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:25:54,311 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:25:54,312 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:25:54,313 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:25:54,314 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:25:54,314 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:25:54,315 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:25:54,315 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:25:54,315 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:25:54,316 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:25:54,317 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:25:54,317 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_92f7d4e7-e3da-4cc2-a494-7e66ecc62f11/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2019-10-22 11:25:54,329 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:25:54,329 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:25:54,330 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:25:54,330 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:25:54,330 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:25:54,330 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:25:54,330 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-10-22 11:25:54,330 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:25:54,330 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:25:54,331 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-10-22 11:25:54,331 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-10-22 11:25:54,331 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:25:54,331 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 11:25:54,332 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 11:25:54,332 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:25:54,332 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:25:54,332 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-10-22 11:25:54,332 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 11:25:54,333 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:25:54,333 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:25:54,333 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-10-22 11:25:54,333 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-10-22 11:25:54,333 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-10-22 11:25:54,333 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:25:54,333 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:25:54,334 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:25:54,334 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:25:54,334 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:25:54,334 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:25:54,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:25:54,334 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:25:54,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:25:54,335 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-22 11:25:54,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 11:25:54,335 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:25:54,335 INFO L138 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_92f7d4e7-e3da-4cc2-a494-7e66ecc62f11/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 01c8dcbf548ac0eef8cebe655947adbb13d26f9a [2019-10-22 11:25:54,358 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:25:54,368 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:25:54,371 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:25:54,372 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:25:54,372 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:25:54,373 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_92f7d4e7-e3da-4cc2-a494-7e66ecc62f11/bin/utaipan/../../sv-benchmarks/c/loops/invert_string-2.c [2019-10-22 11:25:54,421 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_92f7d4e7-e3da-4cc2-a494-7e66ecc62f11/bin/utaipan/data/ee68b113f/bb688dcd657945de8ae2b24074ed1ac1/FLAGf2b385df5 [2019-10-22 11:25:54,814 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:25:54,815 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_92f7d4e7-e3da-4cc2-a494-7e66ecc62f11/sv-benchmarks/c/loops/invert_string-2.c [2019-10-22 11:25:54,820 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_92f7d4e7-e3da-4cc2-a494-7e66ecc62f11/bin/utaipan/data/ee68b113f/bb688dcd657945de8ae2b24074ed1ac1/FLAGf2b385df5 [2019-10-22 11:25:54,832 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_92f7d4e7-e3da-4cc2-a494-7e66ecc62f11/bin/utaipan/data/ee68b113f/bb688dcd657945de8ae2b24074ed1ac1 [2019-10-22 11:25:54,834 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:25:54,835 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:25:54,836 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:25:54,836 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:25:54,839 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:25:54,840 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:25:54" (1/1) ... [2019-10-22 11:25:54,843 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@260eacc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:54, skipping insertion in model container [2019-10-22 11:25:54,843 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:25:54" (1/1) ... [2019-10-22 11:25:54,850 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:25:54,866 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:25:55,011 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:25:55,015 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:25:55,102 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:25:55,119 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:25:55,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:55 WrapperNode [2019-10-22 11:25:55,120 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:25:55,121 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:25:55,121 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:25:55,121 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:25:55,127 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:55" (1/1) ... [2019-10-22 11:25:55,134 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:55" (1/1) ... [2019-10-22 11:25:55,159 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:25:55,159 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:25:55,159 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:25:55,160 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:25:55,170 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:55" (1/1) ... [2019-10-22 11:25:55,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:55" (1/1) ... [2019-10-22 11:25:55,173 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:55" (1/1) ... [2019-10-22 11:25:55,173 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:55" (1/1) ... [2019-10-22 11:25:55,180 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:55" (1/1) ... [2019-10-22 11:25:55,192 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:55" (1/1) ... [2019-10-22 11:25:55,193 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:55" (1/1) ... [2019-10-22 11:25:55,195 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:25:55,195 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:25:55,196 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:25:55,196 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:25:55,197 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:55" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_92f7d4e7-e3da-4cc2-a494-7e66ecc62f11/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:25:55,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-22 11:25:55,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:25:55,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:25:55,272 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-22 11:25:55,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-22 11:25:55,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-22 11:25:55,546 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:25:55,547 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-10-22 11:25:55,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:25:55 BoogieIcfgContainer [2019-10-22 11:25:55,548 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:25:55,549 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:25:55,549 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:25:55,552 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:25:55,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:25:54" (1/3) ... [2019-10-22 11:25:55,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18eb848a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:25:55, skipping insertion in model container [2019-10-22 11:25:55,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:55" (2/3) ... [2019-10-22 11:25:55,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18eb848a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:25:55, skipping insertion in model container [2019-10-22 11:25:55,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:25:55" (3/3) ... [2019-10-22 11:25:55,556 INFO L109 eAbstractionObserver]: Analyzing ICFG invert_string-2.c [2019-10-22 11:25:55,567 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:25:55,574 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2019-10-22 11:25:55,586 INFO L249 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2019-10-22 11:25:55,607 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:25:55,607 INFO L374 AbstractCegarLoop]: Hoare is false [2019-10-22 11:25:55,607 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:25:55,607 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:25:55,607 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:25:55,608 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:25:55,608 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:25:55,608 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:25:55,623 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2019-10-22 11:25:55,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-10-22 11:25:55,631 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:55,632 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-10-22 11:25:55,634 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION]=== [2019-10-22 11:25:55,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:55,640 INFO L82 PathProgramCache]: Analyzing trace with hash 926022, now seen corresponding path program 1 times [2019-10-22 11:25:55,649 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:25:55,650 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944283550] [2019-10-22 11:25:55,650 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:25:55,650 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:25:55,650 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:25:55,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:55,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:25:55,851 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944283550] [2019-10-22 11:25:55,853 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:25:55,853 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-22 11:25:55,853 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812147989] [2019-10-22 11:25:55,859 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-22 11:25:55,861 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:25:55,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-22 11:25:55,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 11:25:55,880 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 2 states. [2019-10-22 11:25:55,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:25:55,895 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2019-10-22 11:25:55,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-22 11:25:55,896 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 4 [2019-10-22 11:25:55,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:25:55,909 INFO L225 Difference]: With dead ends: 39 [2019-10-22 11:25:55,909 INFO L226 Difference]: Without dead ends: 36 [2019-10-22 11:25:55,910 INFO L600 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 [2019-10-22 11:25:55,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-22 11:25:55,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-10-22 11:25:55,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-22 11:25:55,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2019-10-22 11:25:55,938 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 4 [2019-10-22 11:25:55,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:25:55,939 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2019-10-22 11:25:55,939 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-22 11:25:55,939 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2019-10-22 11:25:55,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-10-22 11:25:55,940 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:55,940 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-10-22 11:25:55,940 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION]=== [2019-10-22 11:25:55,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:55,940 INFO L82 PathProgramCache]: Analyzing trace with hash 925712, now seen corresponding path program 1 times [2019-10-22 11:25:55,941 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:25:55,941 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096203463] [2019-10-22 11:25:55,941 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:25:55,941 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:25:55,941 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:25:55,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:55,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:25:55,998 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096203463] [2019-10-22 11:25:55,998 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:25:55,999 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-22 11:25:55,999 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274296377] [2019-10-22 11:25:56,001 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-22 11:25:56,001 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:25:56,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 11:25:56,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 11:25:56,001 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 3 states. [2019-10-22 11:25:56,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:25:56,069 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2019-10-22 11:25:56,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 11:25:56,069 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-10-22 11:25:56,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:25:56,070 INFO L225 Difference]: With dead ends: 32 [2019-10-22 11:25:56,070 INFO L226 Difference]: Without dead ends: 32 [2019-10-22 11:25:56,071 INFO L600 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 [2019-10-22 11:25:56,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-22 11:25:56,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-22 11:25:56,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-22 11:25:56,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-10-22 11:25:56,075 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 4 [2019-10-22 11:25:56,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:25:56,075 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-10-22 11:25:56,075 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-22 11:25:56,075 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-10-22 11:25:56,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-10-22 11:25:56,075 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:56,076 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-10-22 11:25:56,076 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION]=== [2019-10-22 11:25:56,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:56,076 INFO L82 PathProgramCache]: Analyzing trace with hash 925713, now seen corresponding path program 1 times [2019-10-22 11:25:56,076 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:25:56,077 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755187374] [2019-10-22 11:25:56,077 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:25:56,077 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:25:56,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:25:56,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 11:25:56,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 11:25:56,132 INFO L168 tionRefinementEngine]: Strategy TAIPAN found a feasible trace [2019-10-22 11:25:56,132 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 11:25:56,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 11:25:56 BoogieIcfgContainer [2019-10-22 11:25:56,145 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 11:25:56,146 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 11:25:56,146 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 11:25:56,146 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 11:25:56,146 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:25:55" (3/4) ... [2019-10-22 11:25:56,149 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-10-22 11:25:56,186 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_92f7d4e7-e3da-4cc2-a494-7e66ecc62f11/bin/utaipan/witness.graphml [2019-10-22 11:25:56,186 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 11:25:56,188 INFO L168 Benchmark]: Toolchain (without parser) took 1352.68 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.6 MB). Free memory was 941.0 MB in the beginning and 1.1 GB in the end (delta: -133.9 MB). Peak memory consumption was 7.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:56,188 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 958.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:25:56,189 INFO L168 Benchmark]: CACSL2BoogieTranslator took 284.64 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.6 MB). Free memory was 941.0 MB in the beginning and 1.1 GB in the end (delta: -195.2 MB). Peak memory consumption was 23.5 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:56,189 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.53 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:25:56,190 INFO L168 Benchmark]: Boogie Preprocessor took 35.85 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:25:56,190 INFO L168 Benchmark]: RCFGBuilder took 352.79 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: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:56,191 INFO L168 Benchmark]: TraceAbstraction took 596.46 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: 26.8 MB). Peak memory consumption was 26.8 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:56,191 INFO L168 Benchmark]: Witness Printer took 40.52 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: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:56,194 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 958.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 284.64 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.6 MB). Free memory was 941.0 MB in the beginning and 1.1 GB in the end (delta: -195.2 MB). Peak memory consumption was 23.5 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 38.53 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 35.85 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 352.79 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: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 596.46 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: 26.8 MB). Peak memory consumption was 26.8 MB. Max. memory is 11.5 GB. * Witness Printer took 40.52 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: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 21]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L13] int MAX = __VERIFIER_nondet_uint(); [L14] char str1[MAX], str2[MAX]; [L15] int cont, i, j; [L16] cont = 0 [L18] i=0 [L18] COND FALSE !(i