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/svcomp-DerefFreeMemtrack-32bit-Automizer_Camel+AI_EQ_imprecise.epf -i ../../../trunk/examples/svcomp/array-memsafety/openbsd_cmemrchr-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 16:22:06,306 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 16:22:06,307 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 16:22:06,319 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 16:22:06,319 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 16:22:06,320 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 16:22:06,322 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 16:22:06,323 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 16:22:06,325 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 16:22:06,325 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 16:22:06,326 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 16:22:06,326 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 16:22:06,327 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 16:22:06,328 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 16:22:06,329 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 16:22:06,332 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 16:22:06,334 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 16:22:06,336 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 16:22:06,337 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 16:22:06,338 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 16:22:06,341 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-24 16:22:06,346 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Camel+AI_EQ_imprecise.epf [2018-01-24 16:22:06,356 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 16:22:06,356 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 16:22:06,357 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 16:22:06,357 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 16:22:06,357 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 16:22:06,357 INFO L133 SettingsManager]: * Deactivate Weak Equivalences=true [2018-01-24 16:22:06,357 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 16:22:06,358 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 16:22:06,358 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 16:22:06,358 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 16:22:06,359 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 16:22:06,359 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 16:22:06,359 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 16:22:06,359 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 16:22:06,359 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 16:22:06,359 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 16:22:06,360 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 16:22:06,360 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 16:22:06,360 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 16:22:06,360 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 16:22:06,360 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 16:22:06,361 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 16:22:06,361 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 16:22:06,361 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 16:22:06,361 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 16:22:06,361 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 16:22:06,362 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 16:22:06,362 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 16:22:06,362 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 16:22:06,362 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-24 16:22:06,362 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 16:22:06,362 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 16:22:06,363 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 16:22:06,364 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 16:22:06,364 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 16:22:06,397 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 16:22:06,411 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 16:22:06,415 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 16:22:06,416 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 16:22:06,417 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 16:22:06,418 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/openbsd_cmemrchr-alloca_true-valid-memsafety_true-termination.i [2018-01-24 16:22:06,591 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 16:22:06,596 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 16:22:06,597 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 16:22:06,597 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 16:22:06,602 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 16:22:06,603 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 04:22:06" (1/1) ... [2018-01-24 16:22:06,606 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12158f6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:22:06, skipping insertion in model container [2018-01-24 16:22:06,606 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 04:22:06" (1/1) ... [2018-01-24 16:22:06,619 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 16:22:06,657 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 16:22:06,773 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 16:22:06,791 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 16:22:06,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:22:06 WrapperNode [2018-01-24 16:22:06,799 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 16:22:06,799 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 16:22:06,799 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 16:22:06,800 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 16:22:06,817 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:22:06" (1/1) ... [2018-01-24 16:22:06,817 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:22:06" (1/1) ... [2018-01-24 16:22:06,825 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:22:06" (1/1) ... [2018-01-24 16:22:06,825 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:22:06" (1/1) ... [2018-01-24 16:22:06,830 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:22:06" (1/1) ... [2018-01-24 16:22:06,833 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:22:06" (1/1) ... [2018-01-24 16:22:06,834 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:22:06" (1/1) ... [2018-01-24 16:22:06,836 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 16:22:06,836 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 16:22:06,836 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 16:22:06,836 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 16:22:06,837 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:22:06" (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 [2018-01-24 16:22:06,885 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 16:22:06,885 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 16:22:06,885 INFO L136 BoogieDeclarations]: Found implementation of procedure cmemrchr [2018-01-24 16:22:06,885 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 16:22:06,885 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-24 16:22:06,886 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-24 16:22:06,886 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 16:22:06,886 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 16:22:06,886 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 16:22:06,886 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-24 16:22:06,886 INFO L128 BoogieDeclarations]: Found specification of procedure cmemrchr [2018-01-24 16:22:06,886 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 16:22:06,886 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 16:22:06,886 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 16:22:07,065 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 16:22:07,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 04:22:07 BoogieIcfgContainer [2018-01-24 16:22:07,066 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 16:22:07,066 INFO L113 PluginConnector]: ------------------------Abstract Interpretation---------------------------- [2018-01-24 16:22:07,066 INFO L271 PluginConnector]: Initializing Abstract Interpretation... [2018-01-24 16:22:07,067 INFO L276 PluginConnector]: Abstract Interpretation initialized [2018-01-24 16:22:07,067 INFO L185 PluginConnector]: Executing the observer AbstractInterpretationRcfgObserver from plugin Abstract Interpretation for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 04:22:07" (1/1) ... [2018-01-24 16:22:07,119 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-24 16:22:08,025 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-24 16:22:08,044 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-24 16:22:08,048 INFO L268 AbstractInterpreter]: Visited 36 different actions 176 times. Merged at 22 different actions 80 times. Never widened. Found 18 fixpoints after 4 different actions. Largest state had 26 variables. [2018-01-24 16:22:08,050 INFO L132 PluginConnector]: ------------------------ END Abstract Interpretation---------------------------- [2018-01-24 16:22:08,051 INFO L168 Benchmark]: Toolchain (without parser) took 1459.84 ms. Allocated memory was 298.3 MB in the beginning and 326.1 MB in the end (delta: 27.8 MB). Free memory was 257.4 MB in the beginning and 169.7 MB in the end (delta: 87.7 MB). Peak memory consumption was 115.4 MB. Max. memory is 5.3 GB. [2018-01-24 16:22:08,052 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 298.3 MB. Free memory is still 263.3 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-24 16:22:08,053 INFO L168 Benchmark]: CACSL2BoogieTranslator took 202.45 ms. Allocated memory is still 298.3 MB. Free memory was 257.4 MB in the beginning and 247.4 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. [2018-01-24 16:22:08,053 INFO L168 Benchmark]: Boogie Preprocessor took 36.38 ms. Allocated memory is still 298.3 MB. Free memory was 247.4 MB in the beginning and 245.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-24 16:22:08,053 INFO L168 Benchmark]: RCFGBuilder took 229.85 ms. Allocated memory is still 298.3 MB. Free memory was 245.4 MB in the beginning and 230.9 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.6 MB. Max. memory is 5.3 GB. [2018-01-24 16:22:08,054 INFO L168 Benchmark]: Abstract Interpretation took 984.17 ms. Allocated memory was 298.3 MB in the beginning and 326.1 MB in the end (delta: 27.8 MB). Free memory was 230.9 MB in the beginning and 169.7 MB in the end (delta: 61.1 MB). Peak memory consumption was 88.9 MB. Max. memory is 5.3 GB. [2018-01-24 16:22:08,056 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 298.3 MB. Free memory is still 263.3 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 202.45 ms. Allocated memory is still 298.3 MB. Free memory was 257.4 MB in the beginning and 247.4 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 36.38 ms. Allocated memory is still 298.3 MB. Free memory was 247.4 MB in the beginning and 245.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 229.85 ms. Allocated memory is still 298.3 MB. Free memory was 245.4 MB in the beginning and 230.9 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.6 MB. Max. memory is 5.3 GB. * Abstract Interpretation took 984.17 ms. Allocated memory was 298.3 MB in the beginning and 326.1 MB in the end (delta: 27.8 MB). Free memory was 230.9 MB in the beginning and 169.7 MB in the end (delta: 61.1 MB). Peak memory consumption was 88.9 MB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: - StatisticsResult: ArrayEqualityDomainStatistics #Locations : 29 LocStat_MAX_WEQGRAPH_SIZE : 0 LocStat_MAX_SIZEOF_WEQEDGELABEL : 0 LocStat_NO_SUPPORTING_EQUALITIES : 204 LocStat_NO_SUPPORTING_DISEQUALITIES : 22 LocStat_NO_DISJUNCTIONS : -58 LocStat_MAX_NO_DISJUNCTIONS : -1 #Transitions : 42 TransStat_MAX_WEQGRAPH_SIZE : 0 TransStat_MAX_SIZEOF_WEQEDGELABEL : 0 TransStat_NO_SUPPORTING_EQUALITIES : 59 TransStat_NO_SUPPORTING_DISEQUALITIES : 7 TransStat_NO_DISJUNCTIONS : 42 TransStat_MAX_NO_DISJUNCTIONS : 2 - StatisticsResult: EqConstraintFactoryStatistics CONJOIN_DISJUNCTIVE(MILLISECONDS) : 0.629462 RENAME_VARIABLES(MILLISECONDS) : 0.040895 UNFREEZE(MILLISECONDS) : 0.000000 CONJOIN(MILLISECONDS) : 0.231702 PROJECTAWAY(MILLISECONDS) : 0.947200 ADD_WEAK_EQUALITY(MILLISECONDS) : 0.002779 DISJOIN(MILLISECONDS) : 0.351828 RENAME_VARIABLES_DISJUNCTIVE(MILLISECONDS) : 0.065059 ADD_EQUALITY(MILLISECONDS) : 0.053277 DISJOIN_DISJUNCTIVE(MILLISECONDS) : 0.000000 ADD_DISEQUALITY(MILLISECONDS) : 0.018173 #CONJOIN_DISJUNCTIVE : 254 #RENAME_VARIABLES : 615 #UNFREEZE : 0 #CONJOIN : 465 #PROJECTAWAY : 448 #ADD_WEAK_EQUALITY : 4 #DISJOIN : 62 #RENAME_VARIABLES_DISJUNCTIVE : 615 #ADD_EQUALITY : 59 #DISJOIN_DISJUNCTIVE : 0 #ADD_DISEQUALITY : 6 - UnprovableResult [Line: 1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: abstract domain could reach this error location. Possible FailurePath: [L554] int length = __VERIFIER_nondet_int(); [L555] int n = __VERIFIER_nondet_int(); [L556] int c = __VERIFIER_nondet_int(); [L557] COND TRUE length < 1 [L558] length = 1 [L560] COND TRUE n < 1 [L561] n = 1 [L563] EXPR, FCALL __builtin_alloca (n * sizeof(char)) [L563] char* nondetArea = (char*) __builtin_alloca (n * sizeof(char)); [L564] CALL cmemrchr(nondetArea, c, n) [L543] const unsigned char *cp; [L544] COND TRUE n != 0 [L545] cp = (unsigned char *)s + n [L547] --cp - UnprovableResult [Line: 553]: 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: [L554] int length = __VERIFIER_nondet_int(); [L555] int n = __VERIFIER_nondet_int(); [L556] int c = __VERIFIER_nondet_int(); [L557] COND TRUE length < 1 [L558] length = 1 [L560] COND TRUE n < 1 [L561] n = 1 [L563] EXPR, FCALL __builtin_alloca (n * sizeof(char)) [L563] char* nondetArea = (char*) __builtin_alloca (n * sizeof(char)); [L564] CALL cmemrchr(nondetArea, c, n) [L543] const unsigned char *cp; [L544] COND FALSE !(n != 0) [L551] RET return(((void *)0)); [L564] cmemrchr(nondetArea, c, n) [L565] return 0; - PositiveResult [Line: 1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds 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) 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/openbsd_cmemrchr-alloca_true-valid-memsafety_true-termination.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Camel+AI_EQ_imprecise.epf_AbstractInterpretationC.xml/Csv-Benchmark-0-2018-01-24_16-22-08-067.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cmemrchr-alloca_true-valid-memsafety_true-termination.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Camel+AI_EQ_imprecise.epf_AbstractInterpretationC.xml/Csv-VPDomainBenchmark-0-2018-01-24_16-22-08-067.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cmemrchr-alloca_true-valid-memsafety_true-termination.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Camel+AI_EQ_imprecise.epf_AbstractInterpretationC.xml/Csv-BenchmarkWithCounters-0-2018-01-24_16-22-08-067.csv Received shutdown request...