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_smtcomp.epf -i ../../../trunk/examples/svcomp/array-memsafety/openbsd_cbzero-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-25 04:07:34,257 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-25 04:07:34,259 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-25 04:07:34,274 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-25 04:07:34,274 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-25 04:07:34,275 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-25 04:07:34,277 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-25 04:07:34,278 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-25 04:07:34,280 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-25 04:07:34,281 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-25 04:07:34,282 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-25 04:07:34,282 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-25 04:07:34,283 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-25 04:07:34,284 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-25 04:07:34,285 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-25 04:07:34,288 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-25 04:07:34,290 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-25 04:07:34,292 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-25 04:07:34,293 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-25 04:07:34,294 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-25 04:07:34,297 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-25 04:07:34,302 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_smtcomp.epf [2018-01-25 04:07:34,366 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-25 04:07:34,367 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-25 04:07:34,368 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-25 04:07:34,368 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-25 04:07:34,368 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-25 04:07:34,368 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-25 04:07:34,368 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-25 04:07:34,368 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-25 04:07:34,369 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-25 04:07:34,369 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-25 04:07:34,369 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-25 04:07:34,369 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-25 04:07:34,369 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-25 04:07:34,369 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-25 04:07:34,369 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-25 04:07:34,369 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-25 04:07:34,370 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-25 04:07:34,370 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-25 04:07:34,370 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-25 04:07:34,370 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-25 04:07:34,370 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-25 04:07:34,370 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-25 04:07:34,370 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-25 04:07:34,371 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-25 04:07:34,371 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-25 04:07:34,371 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-25 04:07:34,371 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-25 04:07:34,371 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-25 04:07:34,372 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-25 04:07:34,372 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-25 04:07:34,372 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-25 04:07:34,372 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-25 04:07:34,372 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-25 04:07:34,373 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-25 04:07:34,373 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-25 04:07:34,405 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-25 04:07:34,415 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-25 04:07:34,419 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-25 04:07:34,420 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-25 04:07:34,421 INFO L276 PluginConnector]: CDTParser initialized [2018-01-25 04:07:34,421 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/openbsd_cbzero-alloca_true-valid-memsafety_true-termination.i [2018-01-25 04:07:34,611 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-25 04:07:34,616 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-25 04:07:34,617 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-25 04:07:34,617 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-25 04:07:34,621 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-25 04:07:34,622 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.01 04:07:34" (1/1) ... [2018-01-25 04:07:34,625 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31a5aa81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 04:07:34, skipping insertion in model container [2018-01-25 04:07:34,625 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.01 04:07:34" (1/1) ... [2018-01-25 04:07:34,638 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-25 04:07:34,674 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-25 04:07:34,791 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-25 04:07:34,809 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-25 04:07:34,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 04:07:34 WrapperNode [2018-01-25 04:07:34,817 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-25 04:07:34,817 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-25 04:07:34,817 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-25 04:07:34,817 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-25 04:07:34,828 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 04:07:34" (1/1) ... [2018-01-25 04:07:34,829 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 04:07:34" (1/1) ... [2018-01-25 04:07:34,836 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 04:07:34" (1/1) ... [2018-01-25 04:07:34,837 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 04:07:34" (1/1) ... [2018-01-25 04:07:34,840 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 04:07:34" (1/1) ... [2018-01-25 04:07:34,842 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 04:07:34" (1/1) ... [2018-01-25 04:07:34,843 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 04:07:34" (1/1) ... [2018-01-25 04:07:34,845 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-25 04:07:34,845 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-25 04:07:34,845 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-25 04:07:34,845 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-25 04:07:34,846 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 04:07:34" (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 [2018-01-25 04:07:35,018 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-25 04:07:35,018 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-25 04:07:35,018 INFO L136 BoogieDeclarations]: Found implementation of procedure cbzero [2018-01-25 04:07:35,019 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-25 04:07:35,019 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-25 04:07:35,019 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-25 04:07:35,019 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-25 04:07:35,019 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-25 04:07:35,019 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-25 04:07:35,019 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-25 04:07:35,020 INFO L128 BoogieDeclarations]: Found specification of procedure cbzero [2018-01-25 04:07:35,020 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-25 04:07:35,020 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-25 04:07:35,020 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-25 04:07:35,168 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-25 04:07:35,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.01 04:07:35 BoogieIcfgContainer [2018-01-25 04:07:35,169 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-25 04:07:35,169 INFO L113 PluginConnector]: ------------------------Abstract Interpretation---------------------------- [2018-01-25 04:07:35,169 INFO L271 PluginConnector]: Initializing Abstract Interpretation... [2018-01-25 04:07:35,169 INFO L276 PluginConnector]: Abstract Interpretation initialized [2018-01-25 04:07:35,170 INFO L185 PluginConnector]: Executing the observer AbstractInterpretationRcfgObserver from plugin Abstract Interpretation for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.01 04:07:35" (1/1) ... [2018-01-25 04:07:35,214 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-25 04:07:45,188 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-25 04:07:45,208 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-25 04:07:45,211 INFO L268 AbstractInterpreter]: Visited 33 different actions 220 times. Merged at 20 different actions 110 times. Never widened. Found 23 fixpoints after 4 different actions. Largest state had 21 variables. [2018-01-25 04:07:45,213 INFO L132 PluginConnector]: ------------------------ END Abstract Interpretation---------------------------- [2018-01-25 04:07:45,214 INFO L168 Benchmark]: Toolchain (without parser) took 10602.64 ms. Allocated memory was 308.3 MB in the beginning and 1.1 GB in the end (delta: 781.2 MB). Free memory was 267.2 MB in the beginning and 515.7 MB in the end (delta: -248.5 MB). Peak memory consumption was 532.7 MB. Max. memory is 5.3 GB. [2018-01-25 04:07:45,215 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 308.3 MB. Free memory is still 273.2 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-25 04:07:45,215 INFO L168 Benchmark]: CACSL2BoogieTranslator took 200.45 ms. Allocated memory is still 308.3 MB. Free memory was 267.2 MB in the beginning and 257.2 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. [2018-01-25 04:07:45,215 INFO L168 Benchmark]: Boogie Preprocessor took 27.36 ms. Allocated memory is still 308.3 MB. Free memory was 257.2 MB in the beginning and 255.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-25 04:07:45,215 INFO L168 Benchmark]: RCFGBuilder took 323.81 ms. Allocated memory is still 308.3 MB. Free memory was 255.2 MB in the beginning and 240.2 MB in the end (delta: 15.1 MB). Peak memory consumption was 15.1 MB. Max. memory is 5.3 GB. [2018-01-25 04:07:45,216 INFO L168 Benchmark]: Abstract Interpretation took 10044.05 ms. Allocated memory was 308.3 MB in the beginning and 1.1 GB in the end (delta: 781.2 MB). Free memory was 240.2 MB in the beginning and 515.7 MB in the end (delta: -275.5 MB). Peak memory consumption was 505.7 MB. Max. memory is 5.3 GB. [2018-01-25 04:07:45,217 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 308.3 MB. Free memory is still 273.2 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 200.45 ms. Allocated memory is still 308.3 MB. Free memory was 267.2 MB in the beginning and 257.2 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 27.36 ms. Allocated memory is still 308.3 MB. Free memory was 257.2 MB in the beginning and 255.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 323.81 ms. Allocated memory is still 308.3 MB. Free memory was 255.2 MB in the beginning and 240.2 MB in the end (delta: 15.1 MB). Peak memory consumption was 15.1 MB. Max. memory is 5.3 GB. * Abstract Interpretation took 10044.05 ms. Allocated memory was 308.3 MB in the beginning and 1.1 GB in the end (delta: 781.2 MB). Free memory was 240.2 MB in the beginning and 515.7 MB in the end (delta: -275.5 MB). Peak memory consumption was 505.7 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 : 2 LocStat_MAX_SIZEOF_WEQEDGELABEL : 3 LocStat_NO_SUPPORTING_EQUALITIES : 199 LocStat_NO_SUPPORTING_DISEQUALITIES : 16 LocStat_NO_DISJUNCTIONS : -54 LocStat_MAX_NO_DISJUNCTIONS : -1 #Transitions : 39 TransStat_MAX_WEQGRAPH_SIZE : 2 TransStat_MAX_SIZEOF_WEQEDGELABEL : 1 TransStat_NO_SUPPORTING_EQUALITIES : 54 TransStat_NO_SUPPORTING_DISEQUALITIES : 5 TransStat_NO_DISJUNCTIONS : 39 TransStat_MAX_NO_DISJUNCTIONS : 2 - StatisticsResult: EqConstraintFactoryStatistics CONJOIN_DISJUNCTIVE(MILLISECONDS) : 1.506535 RENAME_VARIABLES(MILLISECONDS) : 0.002942 UNFREEZE(MILLISECONDS) : 0.000000 CONJOIN(MILLISECONDS) : 1.257550 PROJECTAWAY(MILLISECONDS) : 2.326698 ADD_WEAK_EQUALITY(MILLISECONDS) : 0.057071 DISJOIN(MILLISECONDS) : 0.839254 RENAME_VARIABLES_DISJUNCTIVE(MILLISECONDS) : 0.010698 ADD_EQUALITY(MILLISECONDS) : 0.028529 DISJOIN_DISJUNCTIVE(MILLISECONDS) : 0.000000 ADD_DISEQUALITY(MILLISECONDS) : 0.018307 #CONJOIN_DISJUNCTIVE : 364 #RENAME_VARIABLES : 878 #UNFREEZE : 0 #CONJOIN : 620 #PROJECTAWAY : 572 #ADD_WEAK_EQUALITY : 6 #DISJOIN : 97 #RENAME_VARIABLES_DISJUNCTIVE : 878 #ADD_EQUALITY : 55 #DISJOIN_DISJUNCTIVE : 0 #ADD_DISEQUALITY : 4 - 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: [L548] int length = __VERIFIER_nondet_int(); [L549] int n = __VERIFIER_nondet_int(); [L550] COND TRUE length < 1 [L551] length = 1 [L553] COND TRUE n < 1 [L554] n = 1 [L556] COND FALSE !(n > length) [L557] EXPR, FCALL __builtin_alloca (length * sizeof(char)) [L557] char* nondetArea = (char*) __builtin_alloca (length * sizeof(char)); [L558] CALL cbzero(nondetArea, n) [L543] char *p; [L544] p = b [L544] length-- [L544] COND TRUE length-- [L545] EXPR p++ [L545] FCALL *p++ = '\0' - UnprovableResult [Line: 547]: 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: [L548] int length = __VERIFIER_nondet_int(); [L549] int n = __VERIFIER_nondet_int(); [L550] COND TRUE length < 1 [L551] length = 1 [L553] COND TRUE n < 1 [L554] n = 1 [L556] COND FALSE !(n > length) [L557] EXPR, FCALL __builtin_alloca (length * sizeof(char)) [L557] char* nondetArea = (char*) __builtin_alloca (length * sizeof(char)); [L558] CALL cbzero(nondetArea, n) [L543] char *p; [L544] p = b [L544] length-- [L544] COND FALSE, RET !(length--) [L558] cbzero(nondetArea, n) [L559] 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_cbzero-alloca_true-valid-memsafety_true-termination.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Camel+AI_EQ_smtcomp.epf_AbstractInterpretationC.xml/Csv-Benchmark-0-2018-01-25_04-07-45-224.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cbzero-alloca_true-valid-memsafety_true-termination.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Camel+AI_EQ_smtcomp.epf_AbstractInterpretationC.xml/Csv-VPDomainBenchmark-0-2018-01-25_04-07-45-224.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cbzero-alloca_true-valid-memsafety_true-termination.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Camel+AI_EQ_smtcomp.epf_AbstractInterpretationC.xml/Csv-BenchmarkWithCounters-0-2018-01-25_04-07-45-224.csv Received shutdown request...