./Ultimate.py --spec /storage/repos/svcomp/c/properties/valid-memsafety.prp --file /storage/repos/svcomp/c/loops/invert_string_false-valid-deref.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0ed9222f Calling Ultimate with: java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/svcomp/c/loops/invert_string_false-valid-deref.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 Automizer --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 0.1.24-0ed9222-m [2019-01-14 20:46:06,820 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-14 20:46:06,822 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-14 20:46:06,833 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-01-14 20:46:06,834 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-01-14 20:46:06,835 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-01-14 20:46:06,837 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-01-14 20:46:06,839 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-01-14 20:46:06,841 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-01-14 20:46:06,842 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-01-14 20:46:06,843 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-01-14 20:46:06,843 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-01-14 20:46:06,844 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-01-14 20:46:06,845 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-01-14 20:46:06,847 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-01-14 20:46:06,847 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-01-14 20:46:06,848 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-01-14 20:46:06,850 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-01-14 20:46:06,853 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2019-01-14 20:46:06,854 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-01-14 20:46:06,855 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-01-14 20:46:06,857 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-01-14 20:46:06,859 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-01-14 20:46:06,860 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-01-14 20:46:06,860 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-01-14 20:46:06,861 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-01-14 20:46:06,862 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-01-14 20:46:06,863 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-01-14 20:46:06,864 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2019-01-14 20:46:06,865 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-01-14 20:46:06,865 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2019-01-14 20:46:06,866 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-01-14 20:46:06,866 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-01-14 20:46:06,866 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2019-01-14 20:46:06,868 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2019-01-14 20:46:06,869 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2019-01-14 20:46:06,869 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2019-01-14 20:46:06,883 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-14 20:46:06,884 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-14 20:46:06,885 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-14 20:46:06,885 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-14 20:46:06,885 INFO L133 SettingsManager]: * Use SBE=true [2019-01-14 20:46:06,885 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-14 20:46:06,885 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-14 20:46:06,886 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-01-14 20:46:06,887 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-14 20:46:06,887 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-14 20:46:06,887 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-14 20:46:06,887 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-01-14 20:46:06,887 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2019-01-14 20:46:06,887 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-01-14 20:46:06,888 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-14 20:46:06,889 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-14 20:46:06,889 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-14 20:46:06,889 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-14 20:46:06,889 INFO L133 SettingsManager]: * To the following directory=./dump/ [2019-01-14 20:46:06,889 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-14 20:46:06,890 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-01-14 20:46:06,890 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-14 20:46:06,890 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-14 20:46:06,890 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2019-01-14 20:46:06,890 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-14 20:46:06,891 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in 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 -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux 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 -> Automizer 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 [2019-01-14 20:46:06,937 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-14 20:46:06,953 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-14 20:46:06,960 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-14 20:46:06,961 INFO L271 PluginConnector]: Initializing CDTParser... [2019-01-14 20:46:06,961 INFO L276 PluginConnector]: CDTParser initialized [2019-01-14 20:46:06,962 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/loops/invert_string_false-valid-deref.c [2019-01-14 20:46:07,022 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34fcab1cc/d6c2730ac74a4998b5a342b319433d13/FLAG956d4f33e [2019-01-14 20:46:07,500 INFO L307 CDTParser]: Found 1 translation units. [2019-01-14 20:46:07,501 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/loops/invert_string_false-valid-deref.c [2019-01-14 20:46:07,508 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34fcab1cc/d6c2730ac74a4998b5a342b319433d13/FLAG956d4f33e [2019-01-14 20:46:07,858 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34fcab1cc/d6c2730ac74a4998b5a342b319433d13 [2019-01-14 20:46:07,861 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-14 20:46:07,863 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-01-14 20:46:07,864 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-01-14 20:46:07,864 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-01-14 20:46:07,867 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2019-01-14 20:46:07,870 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.01 08:46:07" (1/1) ... [2019-01-14 20:46:07,873 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a621260 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 08:46:07, skipping insertion in model container [2019-01-14 20:46:07,874 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.01 08:46:07" (1/1) ... [2019-01-14 20:46:07,883 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-01-14 20:46:07,901 INFO L176 MainTranslator]: Built tables and reachable declarations [2019-01-14 20:46:08,135 INFO L208 PostProcessor]: Analyzing one entry point: main [2019-01-14 20:46:08,145 INFO L191 MainTranslator]: Completed pre-run [2019-01-14 20:46:08,180 INFO L208 PostProcessor]: Analyzing one entry point: main [2019-01-14 20:46:08,213 INFO L195 MainTranslator]: Completed translation [2019-01-14 20:46:08,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 08:46:08 WrapperNode [2019-01-14 20:46:08,214 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-01-14 20:46:08,215 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-14 20:46:08,216 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-14 20:46:08,216 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-14 20:46:08,230 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 08:46:08" (1/1) ... [2019-01-14 20:46:08,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 08:46:08" (1/1) ... [2019-01-14 20:46:08,240 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 08:46:08" (1/1) ... [2019-01-14 20:46:08,241 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 08:46:08" (1/1) ... [2019-01-14 20:46:08,257 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 08:46:08" (1/1) ... [2019-01-14 20:46:08,264 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 08:46:08" (1/1) ... [2019-01-14 20:46:08,266 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 08:46:08" (1/1) ... [2019-01-14 20:46:08,268 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-14 20:46:08,269 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-14 20:46:08,269 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-14 20:46:08,269 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-14 20:46:08,270 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 08:46:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-01-14 20:46:08,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-01-14 20:46:08,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-14 20:46:08,376 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-01-14 20:46:08,376 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-01-14 20:46:08,376 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-01-14 20:46:08,376 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-01-14 20:46:08,376 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-01-14 20:46:08,377 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-01-14 20:46:08,377 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-01-14 20:46:08,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-01-14 20:46:08,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-01-14 20:46:08,377 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-01-14 20:46:08,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-01-14 20:46:08,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-01-14 20:46:08,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-14 20:46:08,865 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-14 20:46:08,865 INFO L286 CfgBuilder]: Removed 3 assue(true) statements. [2019-01-14 20:46:08,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.01 08:46:08 BoogieIcfgContainer [2019-01-14 20:46:08,868 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-14 20:46:08,869 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-14 20:46:08,869 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-14 20:46:08,873 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-14 20:46:08,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.01 08:46:07" (1/3) ... [2019-01-14 20:46:08,875 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2678f5c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.01 08:46:08, skipping insertion in model container [2019-01-14 20:46:08,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 08:46:08" (2/3) ... [2019-01-14 20:46:08,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2678f5c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.01 08:46:08, skipping insertion in model container [2019-01-14 20:46:08,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.01 08:46:08" (3/3) ... [2019-01-14 20:46:08,879 INFO L112 eAbstractionObserver]: Analyzing ICFG invert_string_false-valid-deref.c [2019-01-14 20:46:08,887 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-14 20:46:08,895 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2019-01-14 20:46:08,912 INFO L257 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2019-01-14 20:46:08,945 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2019-01-14 20:46:08,946 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-14 20:46:08,946 INFO L383 AbstractCegarLoop]: Hoare is false [2019-01-14 20:46:08,946 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-14 20:46:08,946 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-14 20:46:08,947 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-14 20:46:08,947 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-14 20:46:08,947 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-14 20:46:08,947 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-14 20:46:08,967 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2019-01-14 20:46:08,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-01-14 20:46:08,976 INFO L394 BasicCegarLoop]: Found error trace [2019-01-14 20:46:08,977 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-01-14 20:46:08,978 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr3REQUIRES_VIOLATION, mainErr12ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION]=== [2019-01-14 20:46:08,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-14 20:46:08,983 INFO L82 PathProgramCache]: Analyzing trace with hash -523138443, now seen corresponding path program 1 times [2019-01-14 20:46:08,984 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-14 20:46:08,985 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-14 20:46:09,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 20:46:09,023 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-14 20:46:09,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 20:46:09,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-14 20:46:09,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-14 20:46:09,109 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-14 20:46:09,109 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-01-14 20:46:09,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-01-14 20:46:09,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-01-14 20:46:09,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-01-14 20:46:09,131 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 2 states. [2019-01-14 20:46:09,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-14 20:46:09,150 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2019-01-14 20:46:09,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-01-14 20:46:09,152 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2019-01-14 20:46:09,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-14 20:46:09,162 INFO L225 Difference]: With dead ends: 47 [2019-01-14 20:46:09,162 INFO L226 Difference]: Without dead ends: 43 [2019-01-14 20:46:09,164 INFO L631 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 [2019-01-14 20:46:09,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-01-14 20:46:09,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-01-14 20:46:09,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-01-14 20:46:09,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2019-01-14 20:46:09,202 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 8 [2019-01-14 20:46:09,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-14 20:46:09,202 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2019-01-14 20:46:09,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-01-14 20:46:09,203 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2019-01-14 20:46:09,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-01-14 20:46:09,203 INFO L394 BasicCegarLoop]: Found error trace [2019-01-14 20:46:09,203 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-01-14 20:46:09,204 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr3REQUIRES_VIOLATION, mainErr12ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION]=== [2019-01-14 20:46:09,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-14 20:46:09,204 INFO L82 PathProgramCache]: Analyzing trace with hash -523138753, now seen corresponding path program 1 times [2019-01-14 20:46:09,204 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-14 20:46:09,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-14 20:46:09,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 20:46:09,206 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-14 20:46:09,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 20:46:09,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-14 20:46:09,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-14 20:46:09,281 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-14 20:46:09,281 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-01-14 20:46:09,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-14 20:46:09,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-14 20:46:09,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-14 20:46:09,284 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 3 states. [2019-01-14 20:46:09,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-14 20:46:09,430 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2019-01-14 20:46:09,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-14 20:46:09,431 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-01-14 20:46:09,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-14 20:46:09,432 INFO L225 Difference]: With dead ends: 39 [2019-01-14 20:46:09,432 INFO L226 Difference]: Without dead ends: 39 [2019-01-14 20:46:09,433 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 [2019-01-14 20:46:09,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-01-14 20:46:09,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-01-14 20:46:09,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-01-14 20:46:09,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2019-01-14 20:46:09,439 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 8 [2019-01-14 20:46:09,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-14 20:46:09,439 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2019-01-14 20:46:09,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-14 20:46:09,440 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2019-01-14 20:46:09,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-01-14 20:46:09,440 INFO L394 BasicCegarLoop]: Found error trace [2019-01-14 20:46:09,440 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-01-14 20:46:09,440 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr3REQUIRES_VIOLATION, mainErr12ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION]=== [2019-01-14 20:46:09,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-14 20:46:09,441 INFO L82 PathProgramCache]: Analyzing trace with hash -523138752, now seen corresponding path program 1 times [2019-01-14 20:46:09,441 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-14 20:46:09,441 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-14 20:46:09,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 20:46:09,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-14 20:46:09,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 20:46:09,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-01-14 20:46:09,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-01-14 20:46:09,533 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2019-01-14 20:46:09,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.01 08:46:09 BoogieIcfgContainer [2019-01-14 20:46:09,551 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-01-14 20:46:09,551 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-01-14 20:46:09,551 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-01-14 20:46:09,551 INFO L276 PluginConnector]: Witness Printer initialized [2019-01-14 20:46:09,552 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.01 08:46:08" (3/4) ... [2019-01-14 20:46:09,554 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2019-01-14 20:46:09,591 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-01-14 20:46:09,591 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-01-14 20:46:09,592 INFO L168 Benchmark]: Toolchain (without parser) took 1730.39 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 951.4 MB in the beginning and 1.1 GB in the end (delta: -124.2 MB). Peak memory consumption was 15.8 MB. Max. memory is 11.5 GB. [2019-01-14 20:46:09,594 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-01-14 20:46:09,594 INFO L168 Benchmark]: CACSL2BoogieTranslator took 350.60 ms. Allocated memory is still 1.0 GB. Free memory was 951.4 MB in the beginning and 940.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-01-14 20:46:09,595 INFO L168 Benchmark]: Boogie Preprocessor took 52.76 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-01-14 20:46:09,596 INFO L168 Benchmark]: RCFGBuilder took 599.67 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 940.6 MB in the beginning and 1.1 GB in the end (delta: -168.1 MB). Peak memory consumption was 18.5 MB. Max. memory is 11.5 GB. [2019-01-14 20:46:09,597 INFO L168 Benchmark]: TraceAbstraction took 681.57 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: 33.1 MB). Peak memory consumption was 33.1 MB. Max. memory is 11.5 GB. [2019-01-14 20:46:09,597 INFO L168 Benchmark]: Witness Printer took 40.31 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. [2019-01-14 20:46:09,601 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 350.60 ms. Allocated memory is still 1.0 GB. Free memory was 951.4 MB in the beginning and 940.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 52.76 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 599.67 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 940.6 MB in the beginning and 1.1 GB in the end (delta: -168.1 MB). Peak memory consumption was 18.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 681.57 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: 33.1 MB). Peak memory consumption was 33.1 MB. Max. memory is 11.5 GB. * Witness Printer took 40.31 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: 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 VAL [cont=0, i=0, MAX=0, str1={1:0}, str2={-1:0}] [L18] COND FALSE !(i