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/cstrchr_unsafe_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-25 03:57:49,741 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-25 03:57:49,742 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-25 03:57:49,754 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-25 03:57:49,754 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-25 03:57:49,755 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-25 03:57:49,756 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-25 03:57:49,757 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-25 03:57:49,759 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-25 03:57:49,759 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-25 03:57:49,760 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-25 03:57:49,761 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-25 03:57:49,762 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-25 03:57:49,763 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-25 03:57:49,764 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-25 03:57:49,766 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-25 03:57:49,768 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-25 03:57:49,770 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-25 03:57:49,772 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-25 03:57:49,772 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-25 03:57:49,774 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-25 03:57:49,778 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-25 03:57:49,779 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-25 03:57:49,779 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 03:57:49,788 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-25 03:57:49,789 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-25 03:57:49,789 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-25 03:57:49,789 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-25 03:57:49,790 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-25 03:57:49,790 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-25 03:57:49,790 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-25 03:57:49,790 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-25 03:57:49,790 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-25 03:57:49,791 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-25 03:57:49,791 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-25 03:57:49,791 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-25 03:57:49,791 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-25 03:57:49,791 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-25 03:57:49,791 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-25 03:57:49,791 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-25 03:57:49,791 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-25 03:57:49,792 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-25 03:57:49,792 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-25 03:57:49,792 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-25 03:57:49,792 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-25 03:57:49,792 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-25 03:57:49,792 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-25 03:57:49,793 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-25 03:57:49,793 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-25 03:57:49,793 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-25 03:57:49,793 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-25 03:57:49,793 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-25 03:57:49,793 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-25 03:57:49,794 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-25 03:57:49,794 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-25 03:57:49,794 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-25 03:57:49,794 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-25 03:57:49,795 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-25 03:57:49,795 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-25 03:57:49,827 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-25 03:57:49,837 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-25 03:57:49,841 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-25 03:57:49,842 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-25 03:57:49,842 INFO L276 PluginConnector]: CDTParser initialized [2018-01-25 03:57:49,843 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/cstrchr_unsafe_false-valid-deref.i [2018-01-25 03:57:50,043 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-25 03:57:50,049 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-25 03:57:50,050 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-25 03:57:50,050 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-25 03:57:50,056 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-25 03:57:50,057 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.01 03:57:50" (1/1) ... [2018-01-25 03:57:50,059 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b352040 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:57:50, skipping insertion in model container [2018-01-25 03:57:50,059 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.01 03:57:50" (1/1) ... [2018-01-25 03:57:50,079 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-25 03:57:50,119 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-25 03:57:50,235 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-25 03:57:50,249 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-25 03:57:50,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:57:50 WrapperNode [2018-01-25 03:57:50,256 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-25 03:57:50,257 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-25 03:57:50,257 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-25 03:57:50,257 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-25 03:57:50,274 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:57:50" (1/1) ... [2018-01-25 03:57:50,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:57:50" (1/1) ... [2018-01-25 03:57:50,285 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:57:50" (1/1) ... [2018-01-25 03:57:50,285 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:57:50" (1/1) ... [2018-01-25 03:57:50,288 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:57:50" (1/1) ... [2018-01-25 03:57:50,290 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:57:50" (1/1) ... [2018-01-25 03:57:50,291 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:57:50" (1/1) ... [2018-01-25 03:57:50,293 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-25 03:57:50,293 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-25 03:57:50,293 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-25 03:57:50,293 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-25 03:57:50,294 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:57:50" (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 03:57:50,337 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-25 03:57:50,337 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-25 03:57:50,337 INFO L136 BoogieDeclarations]: Found implementation of procedure build_nondet_String [2018-01-25 03:57:50,337 INFO L136 BoogieDeclarations]: Found implementation of procedure cstrchr [2018-01-25 03:57:50,338 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-25 03:57:50,338 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-25 03:57:50,338 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-25 03:57:50,338 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-25 03:57:50,338 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-25 03:57:50,338 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-25 03:57:50,338 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-25 03:57:50,338 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-25 03:57:50,338 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-25 03:57:50,338 INFO L128 BoogieDeclarations]: Found specification of procedure build_nondet_String [2018-01-25 03:57:50,339 INFO L128 BoogieDeclarations]: Found specification of procedure cstrchr [2018-01-25 03:57:50,339 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-25 03:57:50,339 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-25 03:57:50,339 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-25 03:57:50,532 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-25 03:57:50,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.01 03:57:50 BoogieIcfgContainer [2018-01-25 03:57:50,573 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-25 03:57:50,574 INFO L113 PluginConnector]: ------------------------Abstract Interpretation---------------------------- [2018-01-25 03:57:50,574 INFO L271 PluginConnector]: Initializing Abstract Interpretation... [2018-01-25 03:57:50,574 INFO L276 PluginConnector]: Abstract Interpretation initialized [2018-01-25 03:57:50,575 INFO L185 PluginConnector]: Executing the observer AbstractInterpretationRcfgObserver from plugin Abstract Interpretation for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.01 03:57:50" (1/1) ... [2018-01-25 03:57:50,621 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-25 03:57:56,073 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-25 03:57:56,098 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-25 03:57:56,101 INFO L268 AbstractInterpreter]: Visited 54 different actions 266 times. Merged at 37 different actions 144 times. Never widened. Found 24 fixpoints after 10 different actions. Largest state had 26 variables. [2018-01-25 03:57:56,103 INFO L132 PluginConnector]: ------------------------ END Abstract Interpretation---------------------------- [2018-01-25 03:57:56,104 INFO L168 Benchmark]: Toolchain (without parser) took 6060.29 ms. Allocated memory was 296.2 MB in the beginning and 649.1 MB in the end (delta: 352.8 MB). Free memory was 253.1 MB in the beginning and 171.3 MB in the end (delta: 81.8 MB). Peak memory consumption was 434.6 MB. Max. memory is 5.3 GB. [2018-01-25 03:57:56,105 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 296.2 MB. Free memory is still 261.1 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-25 03:57:56,105 INFO L168 Benchmark]: CACSL2BoogieTranslator took 206.37 ms. Allocated memory is still 296.2 MB. Free memory was 253.1 MB in the beginning and 243.2 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. [2018-01-25 03:57:56,105 INFO L168 Benchmark]: Boogie Preprocessor took 35.85 ms. Allocated memory is still 296.2 MB. Free memory was 243.2 MB in the beginning and 241.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-25 03:57:56,106 INFO L168 Benchmark]: RCFGBuilder took 280.50 ms. Allocated memory is still 296.2 MB. Free memory was 241.2 MB in the beginning and 222.2 MB in the end (delta: 19.0 MB). Peak memory consumption was 19.0 MB. Max. memory is 5.3 GB. [2018-01-25 03:57:56,106 INFO L168 Benchmark]: Abstract Interpretation took 5529.36 ms. Allocated memory was 296.2 MB in the beginning and 649.1 MB in the end (delta: 352.8 MB). Free memory was 222.2 MB in the beginning and 171.3 MB in the end (delta: 50.9 MB). Peak memory consumption was 403.7 MB. Max. memory is 5.3 GB. [2018-01-25 03:57:56,108 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 296.2 MB. Free memory is still 261.1 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 206.37 ms. Allocated memory is still 296.2 MB. Free memory was 253.1 MB in the beginning and 243.2 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 35.85 ms. Allocated memory is still 296.2 MB. Free memory was 243.2 MB in the beginning and 241.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 280.50 ms. Allocated memory is still 296.2 MB. Free memory was 241.2 MB in the beginning and 222.2 MB in the end (delta: 19.0 MB). Peak memory consumption was 19.0 MB. Max. memory is 5.3 GB. * Abstract Interpretation took 5529.36 ms. Allocated memory was 296.2 MB in the beginning and 649.1 MB in the end (delta: 352.8 MB). Free memory was 222.2 MB in the beginning and 171.3 MB in the end (delta: 50.9 MB). Peak memory consumption was 403.7 MB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: - StatisticsResult: ArrayEqualityDomainStatistics #Locations : 43 LocStat_MAX_WEQGRAPH_SIZE : 4 LocStat_MAX_SIZEOF_WEQEDGELABEL : 1 LocStat_NO_SUPPORTING_EQUALITIES : 341 LocStat_NO_SUPPORTING_DISEQUALITIES : 43 LocStat_NO_DISJUNCTIONS : -86 LocStat_MAX_NO_DISJUNCTIONS : -1 #Transitions : 62 TransStat_MAX_WEQGRAPH_SIZE : 2 TransStat_MAX_SIZEOF_WEQEDGELABEL : 1 TransStat_NO_SUPPORTING_EQUALITIES : 101 TransStat_NO_SUPPORTING_DISEQUALITIES : 16 TransStat_NO_DISJUNCTIONS : 71 TransStat_MAX_NO_DISJUNCTIONS : 4 - StatisticsResult: EqConstraintFactoryStatistics CONJOIN_DISJUNCTIVE(MILLISECONDS) : 0.938974 RENAME_VARIABLES(MILLISECONDS) : 0.245952 UNFREEZE(MILLISECONDS) : 0.000000 CONJOIN(MILLISECONDS) : 0.913384 PROJECTAWAY(MILLISECONDS) : 0.338484 ADD_WEAK_EQUALITY(MILLISECONDS) : 0.119253 DISJOIN(MILLISECONDS) : 0.196879 RENAME_VARIABLES_DISJUNCTIVE(MILLISECONDS) : 0.264287 ADD_EQUALITY(MILLISECONDS) : 0.032513 DISJOIN_DISJUNCTIVE(MILLISECONDS) : 0.000000 ADD_DISEQUALITY(MILLISECONDS) : 0.013872 #CONJOIN_DISJUNCTIVE : 423 #RENAME_VARIABLES : 960 #UNFREEZE : 0 #CONJOIN : 687 #PROJECTAWAY : 593 #ADD_WEAK_EQUALITY : 6 #DISJOIN : 106 #RENAME_VARIABLES_DISJUNCTIVE : 894 #ADD_EQUALITY : 94 #DISJOIN_DISJUNCTIVE : 0 #ADD_DISEQUALITY : 14 - 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: [L556] 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: [L556] 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; [L556] EXPR build_nondet_String() [L556] char* s = build_nondet_String(); [L557] CALL cstrchr(s,__VERIFIER_nondet_int()) [L551] 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: [L556] 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; [L556] EXPR build_nondet_String() [L556] char* s = build_nondet_String(); [L557] CALL cstrchr(s,__VERIFIER_nondet_int()) [L551] EXPR, FCALL \read(*s) [L551] *s != '\0' && *s != (char)c [L551] 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: [L556] 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; [L556] EXPR build_nondet_String() [L556] char* s = build_nondet_String(); [L557] CALL cstrchr(s,__VERIFIER_nondet_int()) [L551] EXPR, FCALL \read(*s) [L551] *s != '\0' && *s != (char)c [L551] COND FALSE !(*s != '\0' && *s != (char)c) [L553] 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: [L556] 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; [L556] EXPR build_nondet_String() [L556] char* s = build_nondet_String(); [L557] CALL cstrchr(s,__VERIFIER_nondet_int()) [L551] EXPR, FCALL \read(*s) [L551] *s != '\0' && *s != (char)c [L551] COND FALSE !(*s != '\0' && *s != (char)c) [L553] EXPR, FCALL \read(*s) [L553] COND FALSE, EXPR !((*s == c) ? (char *) s : 0) [L553] RET return ( (*s == c) ? (char *) s : 0 ); [L557] cstrchr(s,__VERIFIER_nondet_int()) [L557] FCALL cstrchr(s,__VERIFIER_nondet_int()) - 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: [L556] 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; [L556] EXPR build_nondet_String() [L556] char* s = build_nondet_String(); [L557] CALL cstrchr(s,__VERIFIER_nondet_int()) [L551] EXPR, FCALL \read(*s) [L551] *s != '\0' && *s != (char)c [L551] COND FALSE !(*s != '\0' && *s != (char)c) [L553] EXPR, FCALL \read(*s) [L553] COND FALSE, EXPR !((*s == c) ? (char *) s : 0) [L553] RET return ( (*s == c) ? (char *) s : 0 ); [L557] cstrchr(s,__VERIFIER_nondet_int()) [L557] FCALL cstrchr(s,__VERIFIER_nondet_int()) - UnprovableResult [Line: 555]: 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: [L556] 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; [L556] EXPR build_nondet_String() [L556] char* s = build_nondet_String(); [L557] CALL, EXPR cstrchr(s,__VERIFIER_nondet_int()) [L551] EXPR, FCALL \read(*s) [L551] *s != '\0' && *s != (char)c [L551] COND FALSE !(*s != '\0' && *s != (char)c) [L553] EXPR, FCALL \read(*s) [L553] COND TRUE, EXPR (*s == c) ? (char *) s : 0 [L553] RET return ( (*s == c) ? (char *) s : 0 ); [L557] EXPR cstrchr(s,__VERIFIER_nondet_int()) [L557] EXPR, FCALL cstrchr(s,__VERIFIER_nondet_int()) [L557] int res = *cstrchr(s,__VERIFIER_nondet_int()); [L558] FCALL free(s) [L559] return res; - 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 - 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 - 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/cstrchr_unsafe_false-valid-deref.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Camel+AI_EQ_smtcomp.epf_AbstractInterpretationC.xml/Csv-Benchmark-0-2018-01-25_03-57-56-116.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrchr_unsafe_false-valid-deref.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Camel+AI_EQ_smtcomp.epf_AbstractInterpretationC.xml/Csv-VPDomainBenchmark-0-2018-01-25_03-57-56-116.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrchr_unsafe_false-valid-deref.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Camel+AI_EQ_smtcomp.epf_AbstractInterpretationC.xml/Csv-BenchmarkWithCounters-0-2018-01-25_03-57-56-116.csv Received shutdown request...