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/cstrlen_unsafe_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 16:20:48,058 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 16:20:48,060 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 16:20:48,075 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 16:20:48,075 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 16:20:48,076 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 16:20:48,077 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 16:20:48,078 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 16:20:48,080 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 16:20:48,080 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 16:20:48,081 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 16:20:48,081 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 16:20:48,082 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 16:20:48,082 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 16:20:48,083 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 16:20:48,086 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 16:20:48,088 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 16:20:48,090 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 16:20:48,091 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 16:20:48,092 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 16:20:48,094 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-24 16:20:48,100 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 16:20:48,100 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 16:20:48,101 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 16:20:48,110 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 16:20:48,111 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 16:20:48,112 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 16:20:48,112 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 16:20:48,112 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 16:20:48,112 INFO L133 SettingsManager]: * Deactivate Weak Equivalences=true [2018-01-24 16:20:48,113 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 16:20:48,113 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 16:20:48,113 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 16:20:48,114 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 16:20:48,114 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 16:20:48,114 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 16:20:48,114 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 16:20:48,115 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 16:20:48,115 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 16:20:48,115 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 16:20:48,115 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 16:20:48,115 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 16:20:48,115 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 16:20:48,116 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 16:20:48,116 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 16:20:48,116 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 16:20:48,116 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 16:20:48,117 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 16:20:48,117 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 16:20:48,117 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 16:20:48,117 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 16:20:48,117 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 16:20:48,118 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 16:20:48,118 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-24 16:20:48,118 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 16:20:48,118 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 16:20:48,118 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 16:20:48,119 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 16:20:48,119 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 16:20:48,162 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 16:20:48,175 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 16:20:48,179 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 16:20:48,180 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 16:20:48,181 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 16:20:48,182 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/cstrlen_unsafe_false-valid-deref.i [2018-01-24 16:20:48,367 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 16:20:48,373 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 16:20:48,374 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 16:20:48,374 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 16:20:48,381 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 16:20:48,382 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 04:20:48" (1/1) ... [2018-01-24 16:20:48,385 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@432f9c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:20:48, skipping insertion in model container [2018-01-24 16:20:48,386 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 04:20:48" (1/1) ... [2018-01-24 16:20:48,405 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 16:20:48,444 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 16:20:48,567 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 16:20:48,586 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 16:20:48,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:20:48 WrapperNode [2018-01-24 16:20:48,594 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 16:20:48,595 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 16:20:48,595 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 16:20:48,595 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 16:20:48,612 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:20:48" (1/1) ... [2018-01-24 16:20:48,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:20:48" (1/1) ... [2018-01-24 16:20:48,621 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:20:48" (1/1) ... [2018-01-24 16:20:48,621 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:20:48" (1/1) ... [2018-01-24 16:20:48,625 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:20:48" (1/1) ... [2018-01-24 16:20:48,628 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:20:48" (1/1) ... [2018-01-24 16:20:48,629 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:20:48" (1/1) ... [2018-01-24 16:20:48,631 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 16:20:48,632 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 16:20:48,632 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 16:20:48,632 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 16:20:48,633 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:20:48" (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 16:20:48,680 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 16:20:48,680 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 16:20:48,681 INFO L136 BoogieDeclarations]: Found implementation of procedure build_nondet_String [2018-01-24 16:20:48,681 INFO L136 BoogieDeclarations]: Found implementation of procedure cstrlen [2018-01-24 16:20:48,681 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 16:20:48,681 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-24 16:20:48,681 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-24 16:20:48,681 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 16:20:48,682 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 16:20:48,682 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 16:20:48,682 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-24 16:20:48,682 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-24 16:20:48,682 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-24 16:20:48,682 INFO L128 BoogieDeclarations]: Found specification of procedure build_nondet_String [2018-01-24 16:20:48,683 INFO L128 BoogieDeclarations]: Found specification of procedure cstrlen [2018-01-24 16:20:48,683 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 16:20:48,683 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 16:20:48,683 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 16:20:48,855 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 16:20:48,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 04:20:48 BoogieIcfgContainer [2018-01-24 16:20:48,856 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 16:20:48,856 INFO L113 PluginConnector]: ------------------------Abstract Interpretation---------------------------- [2018-01-24 16:20:48,856 INFO L271 PluginConnector]: Initializing Abstract Interpretation... [2018-01-24 16:20:48,857 INFO L276 PluginConnector]: Abstract Interpretation initialized [2018-01-24 16:20:48,857 INFO L185 PluginConnector]: Executing the observer AbstractInterpretationRcfgObserver from plugin Abstract Interpretation for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 04:20:48" (1/1) ... [2018-01-24 16:20:48,912 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-24 16:20:49,461 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-24 16:20:49,481 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-24 16:20:49,487 INFO L268 AbstractInterpreter]: Visited 39 different actions 105 times. Merged at 24 different actions 43 times. Never widened. Found 4 fixpoints after 2 different actions. Largest state had 18 variables. [2018-01-24 16:20:49,490 INFO L132 PluginConnector]: ------------------------ END Abstract Interpretation---------------------------- [2018-01-24 16:20:49,492 INFO L168 Benchmark]: Toolchain (without parser) took 1124.44 ms. Allocated memory was 306.2 MB in the beginning and 326.6 MB in the end (delta: 20.4 MB). Free memory was 265.1 MB in the beginning and 256.1 MB in the end (delta: 9.0 MB). Peak memory consumption was 29.4 MB. Max. memory is 5.3 GB. [2018-01-24 16:20:49,495 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 306.2 MB. Free memory is still 271.1 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-24 16:20:49,496 INFO L168 Benchmark]: CACSL2BoogieTranslator took 220.62 ms. Allocated memory is still 306.2 MB. Free memory was 265.1 MB in the beginning and 255.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. [2018-01-24 16:20:49,496 INFO L168 Benchmark]: Boogie Preprocessor took 36.89 ms. Allocated memory is still 306.2 MB. Free memory was 255.1 MB in the beginning and 253.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-24 16:20:49,497 INFO L168 Benchmark]: RCFGBuilder took 223.79 ms. Allocated memory is still 306.2 MB. Free memory was 253.1 MB in the beginning and 238.1 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.9 MB. Max. memory is 5.3 GB. [2018-01-24 16:20:49,497 INFO L168 Benchmark]: Abstract Interpretation took 634.43 ms. Allocated memory was 306.2 MB in the beginning and 326.6 MB in the end (delta: 20.4 MB). Free memory was 238.1 MB in the beginning and 256.1 MB in the end (delta: -18.0 MB). Peak memory consumption was 2.5 MB. Max. memory is 5.3 GB. [2018-01-24 16:20:49,500 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 306.2 MB. Free memory is still 271.1 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 220.62 ms. Allocated memory is still 306.2 MB. Free memory was 265.1 MB in the beginning and 255.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 36.89 ms. Allocated memory is still 306.2 MB. Free memory was 255.1 MB in the beginning and 253.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 223.79 ms. Allocated memory is still 306.2 MB. Free memory was 253.1 MB in the beginning and 238.1 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.9 MB. Max. memory is 5.3 GB. * Abstract Interpretation took 634.43 ms. Allocated memory was 306.2 MB in the beginning and 326.6 MB in the end (delta: 20.4 MB). Free memory was 238.1 MB in the beginning and 256.1 MB in the end (delta: -18.0 MB). Peak memory consumption was 2.5 MB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: - StatisticsResult: ArrayEqualityDomainStatistics #Locations : 32 LocStat_MAX_WEQGRAPH_SIZE : 0 LocStat_MAX_SIZEOF_WEQEDGELABEL : 0 LocStat_NO_SUPPORTING_EQUALITIES : 209 LocStat_NO_SUPPORTING_DISEQUALITIES : 29 LocStat_NO_DISJUNCTIONS : -64 LocStat_MAX_NO_DISJUNCTIONS : -1 #Transitions : 47 TransStat_MAX_WEQGRAPH_SIZE : 0 TransStat_MAX_SIZEOF_WEQEDGELABEL : 0 TransStat_NO_SUPPORTING_EQUALITIES : 73 TransStat_NO_SUPPORTING_DISEQUALITIES : 11 TransStat_NO_DISJUNCTIONS : 51 TransStat_MAX_NO_DISJUNCTIONS : 4 - StatisticsResult: EqConstraintFactoryStatistics CONJOIN_DISJUNCTIVE(MILLISECONDS) : 0.442187 RENAME_VARIABLES(MILLISECONDS) : 0.028107 UNFREEZE(MILLISECONDS) : 0.000000 CONJOIN(MILLISECONDS) : 0.186316 PROJECTAWAY(MILLISECONDS) : 1.051914 ADD_WEAK_EQUALITY(MILLISECONDS) : 0.001701 DISJOIN(MILLISECONDS) : 0.331421 RENAME_VARIABLES_DISJUNCTIVE(MILLISECONDS) : 0.052408 ADD_EQUALITY(MILLISECONDS) : 0.049139 DISJOIN_DISJUNCTIVE(MILLISECONDS) : 0.000000 ADD_DISEQUALITY(MILLISECONDS) : 0.018484 #CONJOIN_DISJUNCTIVE : 171 #RENAME_VARIABLES : 377 #UNFREEZE : 0 #CONJOIN : 309 #PROJECTAWAY : 250 #ADD_WEAK_EQUALITY : 6 #DISJOIN : 41 #RENAME_VARIABLES_DISJUNCTIVE : 356 #ADD_EQUALITY : 66 #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: [L557] CALL build_nondet_String() [L541] int length = __VERIFIER_nondet_int(); [L542] COND TRUE length < 1 [L543] length = 1 [L545] EXPR, FCALL malloc(length * sizeof(char)) [L545] char* nondetString = (char*) malloc(length * sizeof(char)); [L546] FCALL nondetString[length-1] = '\0' - 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: [L557] CALL, EXPR build_nondet_String() [L541] int length = __VERIFIER_nondet_int(); [L542] COND TRUE length < 1 [L543] length = 1 [L545] EXPR, FCALL malloc(length * sizeof(char)) [L545] char* nondetString = (char*) malloc(length * sizeof(char)); [L546] FCALL nondetString[length-1] = '\0' [L547] RET return nondetString; [L557] EXPR build_nondet_String() [L557] char* p = build_nondet_String(); [L558] CALL cstrlen(p) [L551] const char *p = s; [L552] FCALL \read(*p) - UnprovableResult [Line: 556]: 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: [L557] CALL, EXPR build_nondet_String() [L541] int length = __VERIFIER_nondet_int(); [L542] COND TRUE length < 1 [L543] length = 1 [L545] EXPR, FCALL malloc(length * sizeof(char)) [L545] char* nondetString = (char*) malloc(length * sizeof(char)); [L546] FCALL nondetString[length-1] = '\0' [L547] RET return nondetString; [L557] EXPR build_nondet_String() [L557] char* p = build_nondet_String(); [L558] CALL, EXPR cstrlen(p) [L551] const char *p = s; [L552] EXPR, FCALL \read(*p) [L552] COND FALSE !(*p != '\0') [L554] RET return (int)(p - s); [L558] EXPR cstrlen(p) [L558] int res = cstrlen(p); [L559] FCALL free(p) [L560] return res; - PositiveResult [Line: 1]: free always succeeds For all program executions holds that free 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 - PositiveResult [Line: 1]: free always succeeds For all program executions holds that free 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/cstrlen_unsafe_false-valid-deref.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Camel+AI_EQ_imprecise.epf_AbstractInterpretationC.xml/Csv-Benchmark-0-2018-01-24_16-20-49-513.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrlen_unsafe_false-valid-deref.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Camel+AI_EQ_imprecise.epf_AbstractInterpretationC.xml/Csv-VPDomainBenchmark-0-2018-01-24_16-20-49-513.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrlen_unsafe_false-valid-deref.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Camel+AI_EQ_imprecise.epf_AbstractInterpretationC.xml/Csv-BenchmarkWithCounters-0-2018-01-24_16-20-49-513.csv Received shutdown request...