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/cstrncat_unsafe_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 16:20:51,299 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 16:20:51,301 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 16:20:51,316 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 16:20:51,316 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 16:20:51,317 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 16:20:51,318 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 16:20:51,320 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 16:20:51,322 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 16:20:51,323 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 16:20:51,324 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 16:20:51,324 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 16:20:51,325 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 16:20:51,327 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 16:20:51,328 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 16:20:51,330 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 16:20:51,332 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 16:20:51,335 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 16:20:51,336 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 16:20:51,337 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 16:20:51,340 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-24 16:20:51,345 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 16:20:51,346 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 16:20:51,346 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 16:20:51,354 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 16:20:51,355 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 16:20:51,355 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 16:20:51,355 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 16:20:51,355 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 16:20:51,356 INFO L133 SettingsManager]: * Deactivate Weak Equivalences=true [2018-01-24 16:20:51,356 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 16:20:51,356 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 16:20:51,356 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 16:20:51,357 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 16:20:51,357 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 16:20:51,357 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 16:20:51,357 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 16:20:51,357 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 16:20:51,357 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 16:20:51,357 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 16:20:51,358 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 16:20:51,358 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 16:20:51,358 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 16:20:51,358 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 16:20:51,358 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 16:20:51,358 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 16:20:51,358 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 16:20:51,359 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 16:20:51,359 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 16:20:51,359 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 16:20:51,359 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 16:20:51,360 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 16:20:51,360 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 16:20:51,360 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-24 16:20:51,360 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 16:20:51,360 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 16:20:51,360 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 16:20:51,361 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 16:20:51,361 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 16:20:51,396 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 16:20:51,406 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 16:20:51,409 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 16:20:51,411 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 16:20:51,411 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 16:20:51,412 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/cstrncat_unsafe_false-valid-deref.i [2018-01-24 16:20:51,523 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 16:20:51,529 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 16:20:51,530 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 16:20:51,530 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 16:20:51,535 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 16:20:51,536 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 04:20:51" (1/1) ... [2018-01-24 16:20:51,539 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42e244fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:20:51, skipping insertion in model container [2018-01-24 16:20:51,539 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 04:20:51" (1/1) ... [2018-01-24 16:20:51,554 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 16:20:51,568 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 16:20:51,686 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 16:20:51,703 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 16:20:51,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:20:51 WrapperNode [2018-01-24 16:20:51,709 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 16:20:51,710 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 16:20:51,710 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 16:20:51,710 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 16:20:51,722 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:20:51" (1/1) ... [2018-01-24 16:20:51,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:20:51" (1/1) ... [2018-01-24 16:20:51,730 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:20:51" (1/1) ... [2018-01-24 16:20:51,730 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:20:51" (1/1) ... [2018-01-24 16:20:51,734 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:20:51" (1/1) ... [2018-01-24 16:20:51,737 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:20:51" (1/1) ... [2018-01-24 16:20:51,738 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:20:51" (1/1) ... [2018-01-24 16:20:51,740 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 16:20:51,741 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 16:20:51,741 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 16:20:51,741 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 16:20:51,742 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:20:51" (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 16:20:51,791 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 16:20:51,791 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 16:20:51,791 INFO L136 BoogieDeclarations]: Found implementation of procedure cstrncat [2018-01-24 16:20:51,791 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 16:20:51,791 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-24 16:20:51,791 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-24 16:20:51,791 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 16:20:51,791 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 16:20:51,792 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-24 16:20:51,792 INFO L128 BoogieDeclarations]: Found specification of procedure cstrncat [2018-01-24 16:20:51,792 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 16:20:51,792 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 16:20:51,792 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 16:20:51,984 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 16:20:51,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 04:20:51 BoogieIcfgContainer [2018-01-24 16:20:51,985 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 16:20:51,985 INFO L113 PluginConnector]: ------------------------Abstract Interpretation---------------------------- [2018-01-24 16:20:51,986 INFO L271 PluginConnector]: Initializing Abstract Interpretation... [2018-01-24 16:20:51,986 INFO L276 PluginConnector]: Abstract Interpretation initialized [2018-01-24 16:20:51,986 INFO L185 PluginConnector]: Executing the observer AbstractInterpretationRcfgObserver from plugin Abstract Interpretation for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 04:20:51" (1/1) ... [2018-01-24 16:20:52,031 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-24 16:20:52,739 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-24 16:20:52,763 INFO L268 AbstractInterpreter]: Visited 45 different actions 142 times. Merged at 27 different actions 68 times. Never widened. Found 15 fixpoints after 9 different actions. Largest state had 35 variables. [2018-01-24 16:20:52,765 INFO L132 PluginConnector]: ------------------------ END Abstract Interpretation---------------------------- [2018-01-24 16:20:52,767 INFO L168 Benchmark]: Toolchain (without parser) took 1242.40 ms. Allocated memory was 304.1 MB in the beginning and 327.2 MB in the end (delta: 23.1 MB). Free memory was 263.0 MB in the beginning and 180.7 MB in the end (delta: 82.3 MB). Peak memory consumption was 105.4 MB. Max. memory is 5.3 GB. [2018-01-24 16:20:52,767 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 304.1 MB. Free memory is still 267.0 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-24 16:20:52,768 INFO L168 Benchmark]: CACSL2BoogieTranslator took 180.03 ms. Allocated memory is still 304.1 MB. Free memory was 263.0 MB in the beginning and 253.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. [2018-01-24 16:20:52,768 INFO L168 Benchmark]: Boogie Preprocessor took 30.60 ms. Allocated memory is still 304.1 MB. Free memory is still 253.0 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-24 16:20:52,768 INFO L168 Benchmark]: RCFGBuilder took 244.20 ms. Allocated memory is still 304.1 MB. Free memory was 253.0 MB in the beginning and 236.1 MB in the end (delta: 16.9 MB). Peak memory consumption was 16.9 MB. Max. memory is 5.3 GB. [2018-01-24 16:20:52,769 INFO L168 Benchmark]: Abstract Interpretation took 779.94 ms. Allocated memory was 304.1 MB in the beginning and 327.2 MB in the end (delta: 23.1 MB). Free memory was 236.1 MB in the beginning and 180.7 MB in the end (delta: 55.4 MB). Peak memory consumption was 78.5 MB. Max. memory is 5.3 GB. [2018-01-24 16:20:52,770 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 304.1 MB. Free memory is still 267.0 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 180.03 ms. Allocated memory is still 304.1 MB. Free memory was 263.0 MB in the beginning and 253.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 30.60 ms. Allocated memory is still 304.1 MB. Free memory is still 253.0 MB. There was no memory consumed. Max. memory is 5.3 GB. * RCFGBuilder took 244.20 ms. Allocated memory is still 304.1 MB. Free memory was 253.0 MB in the beginning and 236.1 MB in the end (delta: 16.9 MB). Peak memory consumption was 16.9 MB. Max. memory is 5.3 GB. * Abstract Interpretation took 779.94 ms. Allocated memory was 304.1 MB in the beginning and 327.2 MB in the end (delta: 23.1 MB). Free memory was 236.1 MB in the beginning and 180.7 MB in the end (delta: 55.4 MB). Peak memory consumption was 78.5 MB. 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 : 277 LocStat_NO_SUPPORTING_DISEQUALITIES : 30 LocStat_NO_DISJUNCTIONS : -70 LocStat_MAX_NO_DISJUNCTIONS : -1 #Transitions : 51 TransStat_MAX_WEQGRAPH_SIZE : 0 TransStat_MAX_SIZEOF_WEQEDGELABEL : 0 TransStat_NO_SUPPORTING_EQUALITIES : 73 TransStat_NO_SUPPORTING_DISEQUALITIES : 9 TransStat_NO_DISJUNCTIONS : 55 TransStat_MAX_NO_DISJUNCTIONS : 2 - StatisticsResult: EqConstraintFactoryStatistics CONJOIN_DISJUNCTIVE(MILLISECONDS) : 0.392329 RENAME_VARIABLES(MILLISECONDS) : 0.031114 UNFREEZE(MILLISECONDS) : 0.000000 CONJOIN(MILLISECONDS) : 0.121772 PROJECTAWAY(MILLISECONDS) : 0.309419 ADD_WEAK_EQUALITY(MILLISECONDS) : 0.001299 DISJOIN(MILLISECONDS) : 0.262138 RENAME_VARIABLES_DISJUNCTIVE(MILLISECONDS) : 0.058952 ADD_EQUALITY(MILLISECONDS) : 0.038944 DISJOIN_DISJUNCTIVE(MILLISECONDS) : 0.000000 ADD_DISEQUALITY(MILLISECONDS) : 0.065740 #CONJOIN_DISJUNCTIVE : 213 #RENAME_VARIABLES : 444 #UNFREEZE : 0 #CONJOIN : 313 #PROJECTAWAY : 291 #ADD_WEAK_EQUALITY : 5 #DISJOIN : 36 #RENAME_VARIABLES_DISJUNCTIVE : 428 #ADD_EQUALITY : 75 #DISJOIN_DISJUNCTIVE : 0 #ADD_DISEQUALITY : 9 - 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: [L16] char *s1; [L17] char *s2; [L18] int n = __VERIFIER_nondet_int(); [L19] CALL cstrncat(s1, s2, n) [L4] char *s = s1; [L5] FCALL \read(*s) - 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: [L16] char *s1; [L17] char *s2; [L18] int n = __VERIFIER_nondet_int(); [L19] CALL cstrncat(s1, s2, n) [L4] char *s = s1; [L5] FCALL \read(*s) - 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: [L16] char *s1; [L17] char *s2; [L18] int n = __VERIFIER_nondet_int(); [L19] CALL cstrncat(s1, s2, n) [L4] char *s = s1; [L5] EXPR, FCALL \read(*s) [L5] COND FALSE !(*s != '\0') [L7] n != 0 && (*s = *s2++) != '\0' [L7] s2++ - 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: [L16] char *s1; [L17] char *s2; [L18] int n = __VERIFIER_nondet_int(); [L19] CALL cstrncat(s1, s2, n) [L4] char *s = s1; [L5] EXPR, FCALL \read(*s) [L5] COND FALSE !(*s != '\0') [L7] n != 0 && (*s = *s2++) != '\0' [L7] s2++ - 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: [L16] char *s1; [L17] char *s2; [L18] int n = __VERIFIER_nondet_int(); [L19] CALL cstrncat(s1, s2, n) [L4] char *s = s1; [L5] EXPR, FCALL \read(*s) [L5] COND FALSE !(*s != '\0') [L7] n != 0 && (*s = *s2++) != '\0' [L7] EXPR s2++ [L7] FCALL *s = *s2++ - 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: [L16] char *s1; [L17] char *s2; [L18] int n = __VERIFIER_nondet_int(); [L19] CALL cstrncat(s1, s2, n) [L4] char *s = s1; [L5] EXPR, FCALL \read(*s) [L5] COND FALSE !(*s != '\0') [L7] n != 0 && (*s = *s2++) != '\0' [L7] COND FALSE !(n != 0 && (*s = *s2++) != '\0') [L11] FCALL \read(*s) - 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: [L16] char *s1; [L17] char *s2; [L18] int n = __VERIFIER_nondet_int(); [L19] CALL cstrncat(s1, s2, n) [L4] char *s = s1; [L5] EXPR, FCALL \read(*s) [L5] COND FALSE !(*s != '\0') [L7] n != 0 && (*s = *s2++) != '\0' [L7] EXPR s2++ [L7] EXPR, FCALL *s = *s2++ [L7] n != 0 && (*s = *s2++) != '\0' [L7] COND FALSE !(n != 0 && (*s = *s2++) != '\0') [L11] EXPR, FCALL \read(*s) [L11] COND TRUE *s != '\0' [L12] FCALL *s = '\0' - PositiveResult [Line: 15]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location 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/cstrncat_unsafe_false-valid-deref.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Camel+AI_EQ_imprecise.epf_AbstractInterpretationC.xml/Csv-Benchmark-0-2018-01-24_16-20-52-778.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrncat_unsafe_false-valid-deref.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Camel+AI_EQ_imprecise.epf_AbstractInterpretationC.xml/Csv-VPDomainBenchmark-0-2018-01-24_16-20-52-778.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrncat_unsafe_false-valid-deref.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Camel+AI_EQ_imprecise.epf_AbstractInterpretationC.xml/Csv-BenchmarkWithCounters-0-2018-01-24_16-20-52-778.csv Received shutdown request...