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_imprecise.epf -i ../../../trunk/examples/svcomp/array-memsafety/count_down-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-47db877 [2018-01-23 16:08:41,383 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-23 16:08:41,385 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-23 16:08:41,400 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-23 16:08:41,400 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-23 16:08:41,401 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-23 16:08:41,402 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-23 16:08:41,404 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-23 16:08:41,407 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-23 16:08:41,407 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-23 16:08:41,408 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-23 16:08:41,409 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-23 16:08:41,409 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-23 16:08:41,410 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-23 16:08:41,411 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-23 16:08:41,413 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-23 16:08:41,416 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-23 16:08:41,418 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-23 16:08:41,419 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-23 16:08:41,420 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-23 16:08:41,423 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-23 16:08:41,428 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-23 16:08:41,429 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-23 16:08:41,429 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_imprecise.epf [2018-01-23 16:08:41,439 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-23 16:08:41,439 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-23 16:08:41,440 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-23 16:08:41,440 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-23 16:08:41,441 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-23 16:08:41,441 INFO L133 SettingsManager]: * Deactivate Weak Equivalences=true [2018-01-23 16:08:41,441 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-23 16:08:41,441 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-23 16:08:41,442 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-23 16:08:41,442 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-23 16:08:41,442 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-23 16:08:41,443 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-23 16:08:41,443 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-23 16:08:41,443 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-23 16:08:41,443 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-23 16:08:41,443 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-23 16:08:41,444 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-23 16:08:41,444 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-23 16:08:41,444 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-23 16:08:41,444 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-23 16:08:41,444 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-23 16:08:41,445 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-23 16:08:41,445 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-23 16:08:41,445 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-23 16:08:41,445 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-23 16:08:41,445 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-23 16:08:41,446 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-23 16:08:41,446 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-23 16:08:41,446 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-23 16:08:41,446 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-23 16:08:41,447 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-23 16:08:41,447 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-23 16:08:41,447 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-23 16:08:41,447 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-23 16:08:41,447 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-23 16:08:41,447 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-23 16:08:41,448 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-23 16:08:41,449 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-23 16:08:41,483 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-23 16:08:41,494 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-23 16:08:41,497 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-23 16:08:41,498 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-23 16:08:41,498 INFO L276 PluginConnector]: CDTParser initialized [2018-01-23 16:08:41,499 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/count_down-alloca_true-valid-memsafety_true-termination.i [2018-01-23 16:08:41,678 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-23 16:08:41,684 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-23 16:08:41,685 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-23 16:08:41,685 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-23 16:08:41,691 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-23 16:08:41,692 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 04:08:41" (1/1) ... [2018-01-23 16:08:41,694 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e6ab902 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 04:08:41, skipping insertion in model container [2018-01-23 16:08:41,695 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 04:08:41" (1/1) ... [2018-01-23 16:08:41,713 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-23 16:08:41,753 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-23 16:08:41,869 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-23 16:08:41,887 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-23 16:08:41,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 04:08:41 WrapperNode [2018-01-23 16:08:41,895 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-23 16:08:41,895 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-23 16:08:41,896 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-23 16:08:41,896 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-23 16:08:41,912 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 04:08:41" (1/1) ... [2018-01-23 16:08:41,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 04:08:41" (1/1) ... [2018-01-23 16:08:41,921 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 04:08:41" (1/1) ... [2018-01-23 16:08:41,921 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 04:08:41" (1/1) ... [2018-01-23 16:08:41,925 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 04:08:41" (1/1) ... [2018-01-23 16:08:41,928 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 04:08:41" (1/1) ... [2018-01-23 16:08:41,928 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 04:08:41" (1/1) ... [2018-01-23 16:08:41,930 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-23 16:08:41,930 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-23 16:08:41,930 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-23 16:08:41,930 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-23 16:08:41,931 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 04:08:41" (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 16:08:41,975 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-23 16:08:41,976 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-23 16:08:41,976 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-23 16:08:41,976 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-23 16:08:41,976 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-23 16:08:41,976 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-23 16:08:41,976 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-23 16:08:41,977 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-23 16:08:41,977 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-23 16:08:41,977 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-23 16:08:41,977 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-23 16:08:41,977 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-23 16:08:42,166 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-23 16:08:42,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 04:08:42 BoogieIcfgContainer [2018-01-23 16:08:42,167 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-23 16:08:42,168 INFO L113 PluginConnector]: ------------------------Abstract Interpretation---------------------------- [2018-01-23 16:08:42,168 INFO L271 PluginConnector]: Initializing Abstract Interpretation... [2018-01-23 16:08:42,168 INFO L276 PluginConnector]: Abstract Interpretation initialized [2018-01-23 16:08:42,169 INFO L185 PluginConnector]: Executing the observer AbstractInterpretationRcfgObserver from plugin Abstract Interpretation for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 04:08:42" (1/1) ... [2018-01-23 16:08:42,216 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-23 16:08:42,970 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-23 16:08:42,979 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 16:08:42,982 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 16:08:42,982 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 16:08:42,986 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 16:08:42,986 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 16:08:42,986 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 16:08:42,988 INFO L268 AbstractInterpreter]: Visited 44 different actions 179 times. Merged at 28 different actions 105 times. Never widened. Found 21 fixpoints after 6 different actions. Largest state had 26 variables. [2018-01-23 16:08:42,990 INFO L132 PluginConnector]: ------------------------ END Abstract Interpretation---------------------------- [2018-01-23 16:08:42,991 INFO L168 Benchmark]: Toolchain (without parser) took 1311.89 ms. Allocated memory was 306.7 MB in the beginning and 366.0 MB in the end (delta: 59.2 MB). Free memory was 266.6 MB in the beginning and 329.7 MB in the end (delta: -63.1 MB). There was no memory consumed. Max. memory is 5.3 GB. [2018-01-23 16:08:42,992 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 306.7 MB. Free memory is still 272.6 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-23 16:08:42,992 INFO L168 Benchmark]: CACSL2BoogieTranslator took 210.23 ms. Allocated memory is still 306.7 MB. Free memory was 265.6 MB in the beginning and 255.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 5.3 GB. [2018-01-23 16:08:42,992 INFO L168 Benchmark]: Boogie Preprocessor took 34.39 ms. Allocated memory is still 306.7 MB. Free memory was 255.6 MB in the beginning and 254.6 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 5.3 GB. [2018-01-23 16:08:42,992 INFO L168 Benchmark]: RCFGBuilder took 236.95 ms. Allocated memory is still 306.7 MB. Free memory was 254.6 MB in the beginning and 238.5 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 5.3 GB. [2018-01-23 16:08:42,993 INFO L168 Benchmark]: Abstract Interpretation took 822.38 ms. Allocated memory was 306.7 MB in the beginning and 366.0 MB in the end (delta: 59.2 MB). Free memory was 238.5 MB in the beginning and 329.7 MB in the end (delta: -91.2 MB). There was no memory consumed. Max. memory is 5.3 GB. [2018-01-23 16:08:42,994 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 306.7 MB. Free memory is still 272.6 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 210.23 ms. Allocated memory is still 306.7 MB. Free memory was 265.6 MB in the beginning and 255.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 34.39 ms. Allocated memory is still 306.7 MB. Free memory was 255.6 MB in the beginning and 254.6 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 5.3 GB. * RCFGBuilder took 236.95 ms. Allocated memory is still 306.7 MB. Free memory was 254.6 MB in the beginning and 238.5 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 5.3 GB. * Abstract Interpretation took 822.38 ms. Allocated memory was 306.7 MB in the beginning and 366.0 MB in the end (delta: 59.2 MB). Free memory was 238.5 MB in the beginning and 329.7 MB in the end (delta: -91.2 MB). There was no memory consumed. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: - StatisticsResult: ArrayEqualityDomainStatistics #Locations : 35 LocStat_MAX_WEQGRAPH_SIZE : 0 LocStat_MAX_SIZEOF_WEQEDGELABEL : 0 LocStat_NO_SUPPORTING_EQUALITIES : 293 LocStat_NO_SUPPORTING_DISEQUALITIES : 47 LocStat_NO_DISJUNCTIONS : -70 LocStat_MAX_NO_DISJUNCTIONS : -1 #Transitions : 48 TransStat_MAX_WEQGRAPH_SIZE : 0 TransStat_MAX_SIZEOF_WEQEDGELABEL : 0 TransStat_NO_SUPPORTING_EQUALITIES : 50 TransStat_NO_SUPPORTING_DISEQUALITIES : 7 TransStat_NO_DISJUNCTIONS : 46 TransStat_MAX_NO_DISJUNCTIONS : 2 - StatisticsResult: EqConstraintFactoryStatistics CONJOIN_DISJUNCTIVE(MILLISECONDS) : 0.040197 RENAME_VARIABLES(MILLISECONDS) : 0.450801 UNFREEZE(MILLISECONDS) : 0.000000 CONJOIN(MILLISECONDS) : 0.001871 PROJECTAWAY(MILLISECONDS) : 0.257976 ADD_WEAK_EQUALITY(MILLISECONDS) : 0.000927 DISJOIN(MILLISECONDS) : 0.326187 RENAME_VARIABLES_DISJUNCTIVE(MILLISECONDS) : 0.498434 ADD_EQUALITY(MILLISECONDS) : 0.106203 DISJOIN_DISJUNCTIVE(MILLISECONDS) : 0.000000 ADD_DISEQUALITY(MILLISECONDS) : 0.013695 #CONJOIN_DISJUNCTIVE : 285 #RENAME_VARIABLES : 549 #UNFREEZE : 0 #CONJOIN : 319 #PROJECTAWAY : 327 #ADD_WEAK_EQUALITY : 8 #DISJOIN : 12 #RENAME_VARIABLES_DISJUNCTIVE : 572 #ADD_EQUALITY : 51 #DISJOIN_DISJUNCTIVE : 0 #ADD_DISEQUALITY : 6 - 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: 540]: 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: [L541] int i, j; [L542] int val; [L543] int length = __VERIFIER_nondet_int(); [L544] COND TRUE length < 1 || length >= 2147483647 / sizeof(int) [L544] length = 1 [L545] EXPR, FCALL __builtin_alloca (length*sizeof(int)) [L545] int *arr = __builtin_alloca (length*sizeof(int)); [L546] COND FALSE !(!arr) [L547] i=0 [L547] COND FALSE !(i= 2147483647 / sizeof(int) [L544] length = 1 [L545] EXPR, FCALL __builtin_alloca (length*sizeof(int)) [L545] int *arr = __builtin_alloca (length*sizeof(int)); [L546] COND FALSE !(!arr) [L547] i=0 [L547] COND FALSE !(i