java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AbstractInterpretationC.xml -s ../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Camel+AI_EQ_smtcomp.epf -i ../../../trunk/examples/svcomp/array-memsafety/cstrncpy_unsafe_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-47db877 [2018-01-23 21:49:37,919 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-23 21:49:37,921 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-23 21:49:37,934 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-23 21:49:37,934 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-23 21:49:37,935 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-23 21:49:37,936 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-23 21:49:37,938 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-23 21:49:37,941 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-23 21:49:37,941 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-23 21:49:37,942 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-23 21:49:37,943 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-23 21:49:37,944 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-23 21:49:37,944 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-23 21:49:37,945 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-23 21:49:37,948 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-23 21:49:37,950 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-23 21:49:37,952 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-23 21:49:37,954 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-23 21:49:37,955 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-23 21:49:37,957 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-23 21:49:37,962 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-23 21:49:37,963 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-23 21:49:37,963 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Camel+AI_EQ_smtcomp.epf [2018-01-23 21:49:37,973 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-23 21:49:37,974 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-23 21:49:37,975 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-23 21:49:37,975 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-23 21:49:37,975 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-23 21:49:37,975 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-23 21:49:37,975 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-23 21:49:37,976 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-23 21:49:37,976 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-23 21:49:37,976 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-23 21:49:37,977 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-23 21:49:37,977 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-23 21:49:37,977 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-23 21:49:37,977 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-23 21:49:37,977 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-23 21:49:37,978 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-23 21:49:37,978 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-23 21:49:37,978 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-23 21:49:37,978 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-23 21:49:37,978 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-23 21:49:37,978 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-23 21:49:37,979 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-23 21:49:37,979 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-23 21:49:37,979 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-23 21:49:37,979 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-23 21:49:37,979 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-23 21:49:37,980 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-23 21:49:37,980 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-23 21:49:37,980 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-23 21:49:37,980 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-23 21:49:37,980 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-23 21:49:37,981 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-23 21:49:37,981 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-23 21:49:37,981 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-23 21:49:37,981 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-23 21:49:37,981 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-23 21:49:37,982 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-23 21:49:37,982 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-23 21:49:38,018 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-23 21:49:38,029 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-23 21:49:38,032 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-23 21:49:38,033 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-23 21:49:38,034 INFO L276 PluginConnector]: CDTParser initialized [2018-01-23 21:49:38,034 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/cstrncpy_unsafe_false-valid-deref.i [2018-01-23 21:49:38,135 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-23 21:49:38,140 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-23 21:49:38,141 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-23 21:49:38,141 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-23 21:49:38,150 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-23 21:49:38,151 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 09:49:38" (1/1) ... [2018-01-23 21:49:38,155 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e9ade40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 09:49:38, skipping insertion in model container [2018-01-23 21:49:38,155 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 09:49:38" (1/1) ... [2018-01-23 21:49:38,171 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-23 21:49:38,192 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-23 21:49:38,313 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-23 21:49:38,329 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-23 21:49:38,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 09:49:38 WrapperNode [2018-01-23 21:49:38,334 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-23 21:49:38,335 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-23 21:49:38,336 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-23 21:49:38,336 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-23 21:49:38,349 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 09:49:38" (1/1) ... [2018-01-23 21:49:38,349 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 09:49:38" (1/1) ... [2018-01-23 21:49:38,358 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 09:49:38" (1/1) ... [2018-01-23 21:49:38,358 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 09:49:38" (1/1) ... [2018-01-23 21:49:38,360 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 09:49:38" (1/1) ... [2018-01-23 21:49:38,363 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 09:49:38" (1/1) ... [2018-01-23 21:49:38,364 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 09:49:38" (1/1) ... [2018-01-23 21:49:38,366 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-23 21:49:38,366 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-23 21:49:38,366 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-23 21:49:38,366 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-23 21:49:38,367 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 09:49:38" (1/1) ... No working directory specified, using /storage/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 [2018-01-23 21:49:38,416 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-23 21:49:38,416 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-23 21:49:38,416 INFO L136 BoogieDeclarations]: Found implementation of procedure cstrncpy [2018-01-23 21:49:38,417 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-23 21:49:38,417 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-23 21:49:38,417 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-23 21:49:38,417 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-23 21:49:38,417 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-23 21:49:38,417 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-23 21:49:38,417 INFO L128 BoogieDeclarations]: Found specification of procedure cstrncpy [2018-01-23 21:49:38,417 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-23 21:49:38,417 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-23 21:49:38,418 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-23 21:49:38,569 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-23 21:49:38,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 09:49:38 BoogieIcfgContainer [2018-01-23 21:49:38,570 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-23 21:49:38,571 INFO L113 PluginConnector]: ------------------------Abstract Interpretation---------------------------- [2018-01-23 21:49:38,571 INFO L271 PluginConnector]: Initializing Abstract Interpretation... [2018-01-23 21:49:38,571 INFO L276 PluginConnector]: Abstract Interpretation initialized [2018-01-23 21:49:38,572 INFO L185 PluginConnector]: Executing the observer AbstractInterpretationRcfgObserver from plugin Abstract Interpretation for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 09:49:38" (1/1) ... [2018-01-23 21:49:38,619 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-23 21:49:44,308 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-23 21:49:44,316 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 21:49:44,319 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 21:49:44,355 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 21:49:44,355 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 21:49:44,355 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 21:49:44,359 INFO L268 AbstractInterpreter]: Visited 34 different actions 112 times. Merged at 15 different actions 55 times. Never widened. Found 12 fixpoints after 4 different actions. Largest state had 38 variables. [2018-01-23 21:49:44,360 INFO L132 PluginConnector]: ------------------------ END Abstract Interpretation---------------------------- [2018-01-23 21:49:44,361 INFO L168 Benchmark]: Toolchain (without parser) took 6225.38 ms. Allocated memory was 305.1 MB in the beginning and 886.0 MB in the end (delta: 580.9 MB). Free memory was 264.4 MB in the beginning and 338.4 MB in the end (delta: -73.9 MB). Peak memory consumption was 507.0 MB. Max. memory is 5.3 GB. [2018-01-23 21:49:44,361 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 305.1 MB. Free memory is still 269.4 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-23 21:49:44,361 INFO L168 Benchmark]: CACSL2BoogieTranslator took 193.83 ms. Allocated memory is still 305.1 MB. Free memory was 264.4 MB in the beginning and 255.4 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 5.3 GB. [2018-01-23 21:49:44,362 INFO L168 Benchmark]: Boogie Preprocessor took 30.36 ms. Allocated memory is still 305.1 MB. Free memory was 255.4 MB in the beginning and 254.4 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 5.3 GB. [2018-01-23 21:49:44,362 INFO L168 Benchmark]: RCFGBuilder took 204.25 ms. Allocated memory is still 305.1 MB. Free memory was 254.4 MB in the beginning and 239.7 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 5.3 GB. [2018-01-23 21:49:44,362 INFO L168 Benchmark]: Abstract Interpretation took 5789.31 ms. Allocated memory was 305.1 MB in the beginning and 886.0 MB in the end (delta: 580.9 MB). Free memory was 239.7 MB in the beginning and 338.4 MB in the end (delta: -98.7 MB). Peak memory consumption was 482.2 MB. Max. memory is 5.3 GB. [2018-01-23 21:49:44,363 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 305.1 MB. Free memory is still 269.4 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 193.83 ms. Allocated memory is still 305.1 MB. Free memory was 264.4 MB in the beginning and 255.4 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 30.36 ms. Allocated memory is still 305.1 MB. Free memory was 255.4 MB in the beginning and 254.4 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 5.3 GB. * RCFGBuilder took 204.25 ms. Allocated memory is still 305.1 MB. Free memory was 254.4 MB in the beginning and 239.7 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 5.3 GB. * Abstract Interpretation took 5789.31 ms. Allocated memory was 305.1 MB in the beginning and 886.0 MB in the end (delta: 580.9 MB). Free memory was 239.7 MB in the beginning and 338.4 MB in the end (delta: -98.7 MB). Peak memory consumption was 482.2 MB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: - StatisticsResult: ArrayEqualityDomainStatistics #Locations : 27 LocStat_MAX_WEQGRAPH_SIZE : 1 LocStat_MAX_SIZEOF_WEQEDGELABEL : 1 LocStat_NO_SUPPORTING_EQUALITIES : 216 LocStat_NO_SUPPORTING_DISEQUALITIES : 2 LocStat_NO_DISJUNCTIONS : -54 LocStat_MAX_NO_DISJUNCTIONS : -1 #Transitions : 40 TransStat_MAX_WEQGRAPH_SIZE : 2 TransStat_MAX_SIZEOF_WEQEDGELABEL : 1 TransStat_NO_SUPPORTING_EQUALITIES : 60 TransStat_NO_SUPPORTING_DISEQUALITIES : 4 TransStat_NO_DISJUNCTIONS : 36 TransStat_MAX_NO_DISJUNCTIONS : 1 - StatisticsResult: EqConstraintFactoryStatistics CONJOIN_DISJUNCTIVE(MILLISECONDS) : 2.227275 RENAME_VARIABLES(MILLISECONDS) : 0.025803 UNFREEZE(MILLISECONDS) : 0.000000 CONJOIN(MILLISECONDS) : 1.953673 PROJECTAWAY(MILLISECONDS) : 10.347899 ADD_WEAK_EQUALITY(MILLISECONDS) : 0.102986 DISJOIN(MILLISECONDS) : 0.310801 RENAME_VARIABLES_DISJUNCTIVE(MILLISECONDS) : 0.045681 ADD_EQUALITY(MILLISECONDS) : 0.037839 DISJOIN_DISJUNCTIVE(MILLISECONDS) : 0.000000 ADD_DISEQUALITY(MILLISECONDS) : 0.017709 #CONJOIN_DISJUNCTIVE : 195 #RENAME_VARIABLES : 385 #UNFREEZE : 0 #CONJOIN : 261 #PROJECTAWAY : 252 #ADD_WEAK_EQUALITY : 5 #DISJOIN : 27 #RENAME_VARIABLES_DISJUNCTIVE : 416 #ADD_EQUALITY : 62 #DISJOIN_DISJUNCTIVE : 0 #ADD_DISEQUALITY : 4 - UnprovableResult [Line: 1]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: abstract domain could reach this error location. Possible FailurePath: - UnprovableResult [Line: 1]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: abstract domain could reach this error location. Possible FailurePath: [L21] char *s1; [L22] char *s2; [L23] int n = __VERIFIER_nondet_int(); [L24] CALL cstrncpy(s1, s2, n) [L4] char *dst = s1; [L5] const char *src = s2; [L6] char *us; [L7] int n2; [L8] COND FALSE !(n > 0) [L18] RET return s1; [L24] cstrncpy(s1, s2, n) [L25] return 0; - PositiveResult [Line: 2]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 20]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrncpy_unsafe_false-valid-deref.i_mempurity-32bit-Automizer_Camel+AI_EQ_smtcomp.epf_AbstractInterpretationC.xml/Csv-Benchmark-0-2018-01-23_21-49-44-374.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrncpy_unsafe_false-valid-deref.i_mempurity-32bit-Automizer_Camel+AI_EQ_smtcomp.epf_AbstractInterpretationC.xml/Csv-VPDomainBenchmark-0-2018-01-23_21-49-44-374.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrncpy_unsafe_false-valid-deref.i_mempurity-32bit-Automizer_Camel+AI_EQ_smtcomp.epf_AbstractInterpretationC.xml/Csv-BenchmarkWithCounters-0-2018-01-23_21-49-44-374.csv Received shutdown request...