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/list-ext-properties/test-0232_1_false-valid-memtrack_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 16:28:38,732 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 16:28:38,733 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 16:28:38,747 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 16:28:38,747 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 16:28:38,748 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 16:28:38,749 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 16:28:38,750 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 16:28:38,752 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 16:28:38,753 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 16:28:38,753 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 16:28:38,753 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 16:28:38,754 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 16:28:38,755 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 16:28:38,756 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 16:28:38,758 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 16:28:38,761 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 16:28:38,763 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 16:28:38,764 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 16:28:38,765 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 16:28:38,767 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-24 16:28:38,772 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 16:28:38,773 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 16:28:38,773 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 16:28:38,783 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 16:28:38,783 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 16:28:38,784 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 16:28:38,784 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 16:28:38,784 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 16:28:38,784 INFO L133 SettingsManager]: * Deactivate Weak Equivalences=true [2018-01-24 16:28:38,785 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 16:28:38,785 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 16:28:38,785 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 16:28:38,786 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 16:28:38,786 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 16:28:38,786 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 16:28:38,786 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 16:28:38,786 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 16:28:38,786 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 16:28:38,787 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 16:28:38,787 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 16:28:38,787 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 16:28:38,787 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 16:28:38,787 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 16:28:38,788 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 16:28:38,788 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 16:28:38,788 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 16:28:38,788 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 16:28:38,788 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 16:28:38,789 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 16:28:38,789 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 16:28:38,789 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 16:28:38,789 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 16:28:38,789 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-24 16:28:38,790 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 16:28:38,790 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 16:28:38,790 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 16:28:38,791 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 16:28:38,791 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 16:28:38,825 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 16:28:38,837 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 16:28:38,841 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 16:28:38,842 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 16:28:38,843 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 16:28:38,844 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext-properties/test-0232_1_false-valid-memtrack_true-termination.i [2018-01-24 16:28:39,037 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 16:28:39,044 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 16:28:39,045 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 16:28:39,045 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 16:28:39,051 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 16:28:39,051 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 04:28:39" (1/1) ... [2018-01-24 16:28:39,054 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28805b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:28:39, skipping insertion in model container [2018-01-24 16:28:39,054 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 04:28:39" (1/1) ... [2018-01-24 16:28:39,073 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 16:28:39,116 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 16:28:39,240 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 16:28:39,256 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 16:28:39,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:28:39 WrapperNode [2018-01-24 16:28:39,264 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 16:28:39,265 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 16:28:39,266 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 16:28:39,266 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 16:28:39,284 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:28:39" (1/1) ... [2018-01-24 16:28:39,284 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:28:39" (1/1) ... [2018-01-24 16:28:39,295 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:28:39" (1/1) ... [2018-01-24 16:28:39,296 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:28:39" (1/1) ... [2018-01-24 16:28:39,300 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:28:39" (1/1) ... [2018-01-24 16:28:39,303 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:28:39" (1/1) ... [2018-01-24 16:28:39,304 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:28:39" (1/1) ... [2018-01-24 16:28:39,306 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 16:28:39,306 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 16:28:39,306 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 16:28:39,307 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 16:28:39,307 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:28:39" (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 16:28:39,358 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 16:28:39,359 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 16:28:39,359 INFO L136 BoogieDeclarations]: Found implementation of procedure append [2018-01-24 16:28:39,359 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 16:28:39,359 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-24 16:28:39,359 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-24 16:28:39,359 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 16:28:39,359 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 16:28:39,359 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 16:28:39,359 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-24 16:28:39,359 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-24 16:28:39,360 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-24 16:28:39,360 INFO L128 BoogieDeclarations]: Found specification of procedure append [2018-01-24 16:28:39,360 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 16:28:39,360 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 16:28:39,360 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 16:28:39,770 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 16:28:39,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 04:28:39 BoogieIcfgContainer [2018-01-24 16:28:39,771 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 16:28:39,771 INFO L113 PluginConnector]: ------------------------Abstract Interpretation---------------------------- [2018-01-24 16:28:39,771 INFO L271 PluginConnector]: Initializing Abstract Interpretation... [2018-01-24 16:28:39,772 INFO L276 PluginConnector]: Abstract Interpretation initialized [2018-01-24 16:28:39,772 INFO L185 PluginConnector]: Executing the observer AbstractInterpretationRcfgObserver from plugin Abstract Interpretation for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 04:28:39" (1/1) ... [2018-01-24 16:28:39,820 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-24 16:28:41,165 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-24 16:28:41,199 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-24 16:28:41,216 INFO L268 AbstractInterpreter]: Visited 111 different actions 221 times. Merged at 49 different actions 65 times. Never widened. Found 8 fixpoints after 8 different actions. Largest state had 42 variables. [2018-01-24 16:28:41,218 INFO L132 PluginConnector]: ------------------------ END Abstract Interpretation---------------------------- [2018-01-24 16:28:41,219 INFO L168 Benchmark]: Toolchain (without parser) took 2181.10 ms. Allocated memory was 304.1 MB in the beginning and 388.0 MB in the end (delta: 83.9 MB). Free memory was 264.1 MB in the beginning and 328.7 MB in the end (delta: -64.5 MB). Peak memory consumption was 19.4 MB. Max. memory is 5.3 GB. [2018-01-24 16:28:41,220 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 304.1 MB. Free memory is still 270.1 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-24 16:28:41,220 INFO L168 Benchmark]: CACSL2BoogieTranslator took 220.19 ms. Allocated memory is still 304.1 MB. Free memory was 263.1 MB in the beginning and 252.1 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 5.3 GB. [2018-01-24 16:28:41,220 INFO L168 Benchmark]: Boogie Preprocessor took 40.58 ms. Allocated memory is still 304.1 MB. Free memory was 252.1 MB in the beginning and 251.1 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 5.3 GB. [2018-01-24 16:28:41,221 INFO L168 Benchmark]: RCFGBuilder took 464.51 ms. Allocated memory is still 304.1 MB. Free memory was 251.1 MB in the beginning and 223.3 MB in the end (delta: 27.9 MB). Peak memory consumption was 27.9 MB. Max. memory is 5.3 GB. [2018-01-24 16:28:41,221 INFO L168 Benchmark]: Abstract Interpretation took 1446.67 ms. Allocated memory was 304.1 MB in the beginning and 388.0 MB in the end (delta: 83.9 MB). Free memory was 223.3 MB in the beginning and 328.7 MB in the end (delta: -105.4 MB). There was no memory consumed. Max. memory is 5.3 GB. [2018-01-24 16:28:41,223 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 304.1 MB. Free memory is still 270.1 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 220.19 ms. Allocated memory is still 304.1 MB. Free memory was 263.1 MB in the beginning and 252.1 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 40.58 ms. Allocated memory is still 304.1 MB. Free memory was 252.1 MB in the beginning and 251.1 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 5.3 GB. * RCFGBuilder took 464.51 ms. Allocated memory is still 304.1 MB. Free memory was 251.1 MB in the beginning and 223.3 MB in the end (delta: 27.9 MB). Peak memory consumption was 27.9 MB. Max. memory is 5.3 GB. * Abstract Interpretation took 1446.67 ms. Allocated memory was 304.1 MB in the beginning and 388.0 MB in the end (delta: 83.9 MB). Free memory was 223.3 MB in the beginning and 328.7 MB in the end (delta: -105.4 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 : 92 LocStat_MAX_WEQGRAPH_SIZE : 0 LocStat_MAX_SIZEOF_WEQEDGELABEL : 0 LocStat_NO_SUPPORTING_EQUALITIES : 1151 LocStat_NO_SUPPORTING_DISEQUALITIES : 510 LocStat_NO_DISJUNCTIONS : -184 LocStat_MAX_NO_DISJUNCTIONS : -1 #Transitions : 117 TransStat_MAX_WEQGRAPH_SIZE : 0 TransStat_MAX_SIZEOF_WEQEDGELABEL : 0 TransStat_NO_SUPPORTING_EQUALITIES : 206 TransStat_NO_SUPPORTING_DISEQUALITIES : 49 TransStat_NO_DISJUNCTIONS : 144 TransStat_MAX_NO_DISJUNCTIONS : 4 - StatisticsResult: EqConstraintFactoryStatistics CONJOIN_DISJUNCTIVE(MILLISECONDS) : 0.277491 RENAME_VARIABLES(MILLISECONDS) : 0.503013 UNFREEZE(MILLISECONDS) : 0.000000 CONJOIN(MILLISECONDS) : 0.243750 PROJECTAWAY(MILLISECONDS) : 0.248669 ADD_WEAK_EQUALITY(MILLISECONDS) : 0.001208 DISJOIN(MILLISECONDS) : 0.843610 RENAME_VARIABLES_DISJUNCTIVE(MILLISECONDS) : 0.555294 ADD_EQUALITY(MILLISECONDS) : 0.018325 DISJOIN_DISJUNCTIVE(MILLISECONDS) : 0.000000 ADD_DISEQUALITY(MILLISECONDS) : 0.032360 #CONJOIN_DISJUNCTIVE : 342 #RENAME_VARIABLES : 710 #UNFREEZE : 0 #CONJOIN : 629 #PROJECTAWAY : 489 #ADD_WEAK_EQUALITY : 35 #DISJOIN : 110 #RENAME_VARIABLES_DISJUNCTIVE : 640 #ADD_EQUALITY : 194 #DISJOIN_DISJUNCTIVE : 0 #ADD_DISEQUALITY : 37 - 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: [L620] int c = 0; [L637] FCALL struct item *list = ((void *)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: [L620] int c = 0; [L637] FCALL struct item *list = ((void *)0); [L638] int length = 0; [L640] CALL append(&list) [L627] c++ [L628] EXPR, FCALL malloc(sizeof *item) [L628] struct item *item = malloc(sizeof *item); [L629] FCALL \read(**plist) - 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: [L620] int c = 0; [L637] FCALL struct item *list = ((void *)0); [L638] int length = 0; [L640] CALL append(&list) [L627] c++ [L628] EXPR, FCALL malloc(sizeof *item) [L628] struct item *item = malloc(sizeof *item); [L629] FCALL \read(**plist) - 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: [L620] int c = 0; [L637] FCALL struct item *list = ((void *)0); [L638] int length = 0; [L640] CALL append(&list) [L627] c++ [L628] EXPR, FCALL malloc(sizeof *item) [L628] struct item *item = malloc(sizeof *item); [L629] EXPR, FCALL \read(**plist) [L629] FCALL item->next = *plist - 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: [L620] int c = 0; [L637] FCALL struct item *list = ((void *)0); [L638] int length = 0; [L640] CALL append(&list) [L627] c++ [L628] EXPR, FCALL malloc(sizeof *item) [L628] struct item *item = malloc(sizeof *item); [L629] EXPR, FCALL \read(**plist) [L629] FCALL item->next = *plist [L630] FCALL item->next - 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: [L620] int c = 0; [L637] FCALL struct item *list = ((void *)0); [L638] int length = 0; [L640] CALL append(&list) [L627] c++ [L628] EXPR, FCALL malloc(sizeof *item) [L628] struct item *item = malloc(sizeof *item); [L629] EXPR, FCALL \read(**plist) [L629] FCALL item->next = *plist [L630] EXPR, FCALL item->next [L630-L632] COND FALSE, EXPR !((item->next) ? item->next->data : malloc(sizeof *item)) [L632] EXPR, FCALL malloc(sizeof *item) [L630-L632] EXPR (item->next) ? item->next->data : malloc(sizeof *item) [L630-L632] FCALL item->data = (item->next) ? item->next->data : malloc(sizeof *item) - 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: [L620] int c = 0; [L637] FCALL struct item *list = ((void *)0); [L638] int length = 0; [L640] CALL append(&list) [L627] c++ [L628] EXPR, FCALL malloc(sizeof *item) [L628] struct item *item = malloc(sizeof *item); [L629] EXPR, FCALL \read(**plist) [L629] FCALL item->next = *plist [L630] EXPR, FCALL item->next [L630-L632] COND FALSE, EXPR !((item->next) ? item->next->data : malloc(sizeof *item)) [L632] EXPR, FCALL malloc(sizeof *item) [L630-L632] EXPR (item->next) ? item->next->data : malloc(sizeof *item) [L630-L632] FCALL item->data = (item->next) ? item->next->data : malloc(sizeof *item) - 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: [L620] int c = 0; [L637] FCALL struct item *list = ((void *)0); [L638] int length = 0; [L640] CALL append(&list) [L627] c++ [L628] EXPR, FCALL malloc(sizeof *item) [L628] struct item *item = malloc(sizeof *item); [L629] EXPR, FCALL \read(**plist) [L629] FCALL item->next = *plist [L630] EXPR, FCALL item->next [L630-L632] COND FALSE, EXPR !((item->next) ? item->next->data : malloc(sizeof *item)) [L632] EXPR, FCALL malloc(sizeof *item) [L630-L632] EXPR (item->next) ? item->next->data : malloc(sizeof *item) [L630-L632] FCALL item->data = (item->next) ? item->next->data : malloc(sizeof *item) [L633] FCALL *plist = item - 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: [L620] int c = 0; [L637] FCALL struct item *list = ((void *)0); [L638] int length = 0; [L640] CALL append(&list) [L627] c++ [L628] EXPR, FCALL malloc(sizeof *item) [L628] struct item *item = malloc(sizeof *item); [L629] EXPR, FCALL \read(**plist) [L629] FCALL item->next = *plist [L630] EXPR, FCALL item->next [L630-L632] COND FALSE, EXPR !((item->next) ? item->next->data : malloc(sizeof *item)) [L632] EXPR, FCALL malloc(sizeof *item) [L630-L632] EXPR (item->next) ? item->next->data : malloc(sizeof *item) [L630-L632] FCALL item->data = (item->next) ? item->next->data : malloc(sizeof *item) [L633] FCALL *plist = item - 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: [L620] int c = 0; [L637] FCALL struct item *list = ((void *)0); [L638] int length = 0; [L640] CALL append(&list) [L627] c++ [L628] EXPR, FCALL malloc(sizeof *item) [L628] struct item *item = malloc(sizeof *item); [L629] EXPR, FCALL \read(**plist) [L629] FCALL item->next = *plist [L630] EXPR, FCALL item->next [L630-L632] COND FALSE, EXPR !((item->next) ? item->next->data : malloc(sizeof *item)) [L632] EXPR, FCALL malloc(sizeof *item) [L630-L632] EXPR (item->next) ? item->next->data : malloc(sizeof *item) [L630-L632] FCALL item->data = (item->next) ? item->next->data : malloc(sizeof *item) [L633] RET, FCALL *plist = item [L640] append(&list) [L641] length++ [L642] COND FALSE !(__VERIFIER_nondet_int() && c < 20) [L643] COND TRUE length > 0 [L644] COND FALSE !(length < 0) [L647] FCALL \read(*list) - 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: [L620] int c = 0; [L637] FCALL struct item *list = ((void *)0); [L638] int length = 0; [L640] CALL append(&list) [L627] c++ [L628] EXPR, FCALL malloc(sizeof *item) [L628] struct item *item = malloc(sizeof *item); [L629] EXPR, FCALL \read(**plist) [L629] FCALL item->next = *plist [L630] EXPR, FCALL item->next [L630-L632] COND FALSE, EXPR !((item->next) ? item->next->data : malloc(sizeof *item)) [L632] EXPR, FCALL malloc(sizeof *item) [L630-L632] EXPR (item->next) ? item->next->data : malloc(sizeof *item) [L630-L632] FCALL item->data = (item->next) ? item->next->data : malloc(sizeof *item) [L633] RET, FCALL *plist = item [L640] append(&list) [L641] length++ [L642] COND FALSE !(__VERIFIER_nondet_int() && c < 20) [L643] COND TRUE length > 0 [L644] COND TRUE length < 0 [L645] FCALL \read(*list) - 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: [L620] int c = 0; [L637] FCALL struct item *list = ((void *)0); [L638] int length = 0; [L640] CALL append(&list) [L627] c++ [L628] EXPR, FCALL malloc(sizeof *item) [L628] struct item *item = malloc(sizeof *item); [L629] EXPR, FCALL \read(**plist) [L629] FCALL item->next = *plist [L630] EXPR, FCALL item->next [L630-L632] COND FALSE, EXPR !((item->next) ? item->next->data : malloc(sizeof *item)) [L632] EXPR, FCALL malloc(sizeof *item) [L630-L632] EXPR (item->next) ? item->next->data : malloc(sizeof *item) [L630-L632] FCALL item->data = (item->next) ? item->next->data : malloc(sizeof *item) [L633] RET, FCALL *plist = item [L640] append(&list) [L641] length++ [L642] COND FALSE !(__VERIFIER_nondet_int() && c < 20) [L643] COND FALSE !(length > 0) [L652] COND TRUE length > 0 [L653] FCALL \read(*list) - 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: [L620] int c = 0; [L637] FCALL struct item *list = ((void *)0); [L638] int length = 0; [L640] CALL append(&list) [L627] c++ [L628] EXPR, FCALL malloc(sizeof *item) [L628] struct item *item = malloc(sizeof *item); [L629] EXPR, FCALL \read(**plist) [L629] FCALL item->next = *plist [L630] EXPR, FCALL item->next [L630-L632] COND FALSE, EXPR !((item->next) ? item->next->data : malloc(sizeof *item)) [L632] EXPR, FCALL malloc(sizeof *item) [L630-L632] EXPR (item->next) ? item->next->data : malloc(sizeof *item) [L630-L632] FCALL item->data = (item->next) ? item->next->data : malloc(sizeof *item) [L633] RET, FCALL *plist = item [L640] append(&list) [L641] length++ [L642] COND FALSE !(__VERIFIER_nondet_int() && c < 20) [L643] COND TRUE length > 0 [L644] COND FALSE !(length < 0) [L647] EXPR, FCALL \read(*list) [L647] FCALL list->next - 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: [L620] int c = 0; [L637] FCALL struct item *list = ((void *)0); [L638] int length = 0; [L640] CALL append(&list) [L627] c++ [L628] EXPR, FCALL malloc(sizeof *item) [L628] struct item *item = malloc(sizeof *item); [L629] EXPR, FCALL \read(**plist) [L629] FCALL item->next = *plist [L630] EXPR, FCALL item->next [L630-L632] COND FALSE, EXPR !((item->next) ? item->next->data : malloc(sizeof *item)) [L632] EXPR, FCALL malloc(sizeof *item) [L630-L632] EXPR (item->next) ? item->next->data : malloc(sizeof *item) [L630-L632] FCALL item->data = (item->next) ? item->next->data : malloc(sizeof *item) [L633] RET, FCALL *plist = item [L640] append(&list) [L641] length++ [L642] COND FALSE !(__VERIFIER_nondet_int() && c < 20) [L643] COND TRUE length > 0 [L644] COND TRUE length < 0 [L645] EXPR, FCALL \read(*list) [L645] FCALL list->data - 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: [L620] int c = 0; [L637] FCALL struct item *list = ((void *)0); [L638] int length = 0; [L640] CALL append(&list) [L627] c++ [L628] EXPR, FCALL malloc(sizeof *item) [L628] struct item *item = malloc(sizeof *item); [L629] EXPR, FCALL \read(**plist) [L629] FCALL item->next = *plist [L630] EXPR, FCALL item->next [L630-L632] COND FALSE, EXPR !((item->next) ? item->next->data : malloc(sizeof *item)) [L632] EXPR, FCALL malloc(sizeof *item) [L630-L632] EXPR (item->next) ? item->next->data : malloc(sizeof *item) [L630-L632] FCALL item->data = (item->next) ? item->next->data : malloc(sizeof *item) [L633] RET, FCALL *plist = item [L640] append(&list) [L641] length++ [L642] COND FALSE !(__VERIFIER_nondet_int() && c < 20) [L643] COND FALSE !(length > 0) [L652] COND TRUE length > 0 [L653] EXPR, FCALL \read(*list) [L653] FCALL list->next - UnprovableResult [Line: 1]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: abstract domain could reach this error location. Possible FailurePath: [L620] int c = 0; [L637] FCALL struct item *list = ((void *)0); [L638] int length = 0; [L640] CALL append(&list) [L627] c++ [L628] EXPR, FCALL malloc(sizeof *item) [L628] struct item *item = malloc(sizeof *item); [L629] EXPR, FCALL \read(**plist) [L629] FCALL item->next = *plist [L630] EXPR, FCALL item->next [L630-L632] COND FALSE, EXPR !((item->next) ? item->next->data : malloc(sizeof *item)) [L632] EXPR, FCALL malloc(sizeof *item) [L630-L632] EXPR (item->next) ? item->next->data : malloc(sizeof *item) [L630-L632] FCALL item->data = (item->next) ? item->next->data : malloc(sizeof *item) [L633] RET, FCALL *plist = item [L640] append(&list) [L641] length++ [L642] COND FALSE !(__VERIFIER_nondet_int() && c < 20) [L643] COND TRUE length > 0 [L644] COND TRUE length < 0 [L645] EXPR, FCALL \read(*list) [L645] EXPR, FCALL list->data [L645] FCALL free(list->data) - UnprovableResult [Line: 1]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: abstract domain could reach this error location. Possible FailurePath: [L620] int c = 0; [L637] FCALL struct item *list = ((void *)0); [L638] int length = 0; [L640] CALL append(&list) [L627] c++ [L628] EXPR, FCALL malloc(sizeof *item) [L628] struct item *item = malloc(sizeof *item); [L629] EXPR, FCALL \read(**plist) [L629] FCALL item->next = *plist [L630] EXPR, FCALL item->next [L630-L632] COND FALSE, EXPR !((item->next) ? item->next->data : malloc(sizeof *item)) [L632] EXPR, FCALL malloc(sizeof *item) [L630-L632] EXPR (item->next) ? item->next->data : malloc(sizeof *item) [L630-L632] FCALL item->data = (item->next) ? item->next->data : malloc(sizeof *item) [L633] RET, FCALL *plist = item [L640] append(&list) [L641] length++ [L642] COND FALSE !(__VERIFIER_nondet_int() && c < 20) [L643] COND TRUE length > 0 [L644] COND TRUE length < 0 [L645] EXPR, FCALL \read(*list) [L645] EXPR, FCALL list->data [L645] FCALL free(list->data) - 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: [L620] int c = 0; [L637] FCALL struct item *list = ((void *)0); [L638] int length = 0; [L640] CALL append(&list) [L627] c++ [L628] EXPR, FCALL malloc(sizeof *item) [L628] struct item *item = malloc(sizeof *item); [L629] EXPR, FCALL \read(**plist) [L629] FCALL item->next = *plist [L630] EXPR, FCALL item->next [L630-L632] COND FALSE, EXPR !((item->next) ? item->next->data : malloc(sizeof *item)) [L632] EXPR, FCALL malloc(sizeof *item) [L630-L632] EXPR (item->next) ? item->next->data : malloc(sizeof *item) [L630-L632] FCALL item->data = (item->next) ? item->next->data : malloc(sizeof *item) [L633] RET, FCALL *plist = item [L640] append(&list) [L641] length++ [L642] COND FALSE !(__VERIFIER_nondet_int() && c < 20) [L643] COND TRUE length > 0 [L644] COND FALSE !(length < 0) [L647] EXPR, FCALL \read(*list) [L647] EXPR, FCALL list->next [L647] struct item *next = list->next; [L648] FCALL \read(*list) - UnprovableResult [Line: 635]: 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: [L620] int c = 0; [L637] FCALL struct item *list = ((void *)0); [L638] int length = 0; [L640] CALL append(&list) [L627] c++ [L628] EXPR, FCALL malloc(sizeof *item) [L628] struct item *item = malloc(sizeof *item); [L629] EXPR, FCALL \read(**plist) [L629] FCALL item->next = *plist [L630] EXPR, FCALL item->next [L630-L632] COND FALSE, EXPR !((item->next) ? item->next->data : malloc(sizeof *item)) [L632] EXPR, FCALL malloc(sizeof *item) [L630-L632] EXPR (item->next) ? item->next->data : malloc(sizeof *item) [L630-L632] FCALL item->data = (item->next) ? item->next->data : malloc(sizeof *item) [L633] RET, FCALL *plist = item [L640] append(&list) [L641] length++ [L642] COND FALSE !(__VERIFIER_nondet_int() && c < 20) [L643] COND FALSE !(length > 0) [L652] COND FALSE !(length > 0) [L658] return 0; [L637] FCALL struct item *list = ((void *)0); [L658] return 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: [L620] int c = 0; [L637] FCALL struct item *list = ((void *)0); [L638] int length = 0; [L640] CALL append(&list) [L627] c++ [L628] EXPR, FCALL malloc(sizeof *item) [L628] struct item *item = malloc(sizeof *item); [L629] EXPR, FCALL \read(**plist) [L629] FCALL item->next = *plist [L630] EXPR, FCALL item->next [L630-L632] COND FALSE, EXPR !((item->next) ? item->next->data : malloc(sizeof *item)) [L632] EXPR, FCALL malloc(sizeof *item) [L630-L632] EXPR (item->next) ? item->next->data : malloc(sizeof *item) [L630-L632] FCALL item->data = (item->next) ? item->next->data : malloc(sizeof *item) [L633] RET, FCALL *plist = item [L640] append(&list) [L641] length++ [L642] COND FALSE !(__VERIFIER_nondet_int() && c < 20) [L643] COND FALSE !(length > 0) [L652] COND TRUE length > 0 [L653] EXPR, FCALL \read(*list) [L653] EXPR, FCALL list->next [L653] struct item *next = list->next; [L654] FCALL \read(*list) - 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: [L620] int c = 0; [L637] FCALL struct item *list = ((void *)0); [L638] int length = 0; [L640] CALL append(&list) [L627] c++ [L628] EXPR, FCALL malloc(sizeof *item) [L628] struct item *item = malloc(sizeof *item); [L629] EXPR, FCALL \read(**plist) [L629] FCALL item->next = *plist [L630] EXPR, FCALL item->next [L630-L632] COND FALSE, EXPR !((item->next) ? item->next->data : malloc(sizeof *item)) [L632] EXPR, FCALL malloc(sizeof *item) [L630-L632] EXPR (item->next) ? item->next->data : malloc(sizeof *item) [L630-L632] FCALL item->data = (item->next) ? item->next->data : malloc(sizeof *item) [L633] RET, FCALL *plist = item [L640] append(&list) [L641] length++ [L642] COND FALSE !(__VERIFIER_nondet_int() && c < 20) [L643] COND TRUE length > 0 [L644] COND TRUE length < 0 [L645] EXPR, FCALL \read(*list) [L645] EXPR, FCALL list->data [L645] FCALL free(list->data) [L647] FCALL \read(*list) - 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: [L620] int c = 0; [L637] FCALL struct item *list = ((void *)0); [L638] int length = 0; [L640] CALL append(&list) [L627] c++ [L628] EXPR, FCALL malloc(sizeof *item) [L628] struct item *item = malloc(sizeof *item); [L629] EXPR, FCALL \read(**plist) [L629] FCALL item->next = *plist [L630] EXPR, FCALL item->next [L630-L632] COND FALSE, EXPR !((item->next) ? item->next->data : malloc(sizeof *item)) [L632] EXPR, FCALL malloc(sizeof *item) [L630-L632] EXPR (item->next) ? item->next->data : malloc(sizeof *item) [L630-L632] FCALL item->data = (item->next) ? item->next->data : malloc(sizeof *item) [L633] RET, FCALL *plist = item [L640] append(&list) [L641] length++ [L642] COND FALSE !(__VERIFIER_nondet_int() && c < 20) [L643] COND TRUE length > 0 [L644] COND TRUE length < 0 [L645] EXPR, FCALL \read(*list) [L645] EXPR, FCALL list->data [L645] FCALL free(list->data) [L647] EXPR, FCALL \read(*list) [L647] FCALL list->next - 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: [L620] int c = 0; [L637] FCALL struct item *list = ((void *)0); [L638] int length = 0; [L640] CALL append(&list) [L627] c++ [L628] EXPR, FCALL malloc(sizeof *item) [L628] struct item *item = malloc(sizeof *item); [L629] EXPR, FCALL \read(**plist) [L629] FCALL item->next = *plist [L630] EXPR, FCALL item->next [L630-L632] COND FALSE, EXPR !((item->next) ? item->next->data : malloc(sizeof *item)) [L632] EXPR, FCALL malloc(sizeof *item) [L630-L632] EXPR (item->next) ? item->next->data : malloc(sizeof *item) [L630-L632] FCALL item->data = (item->next) ? item->next->data : malloc(sizeof *item) [L633] RET, FCALL *plist = item [L640] append(&list) [L641] length++ [L642] COND FALSE !(__VERIFIER_nondet_int() && c < 20) [L643] COND TRUE length > 0 [L644] COND FALSE !(length < 0) [L647] EXPR, FCALL \read(*list) [L647] EXPR, FCALL list->next [L647] struct item *next = list->next; [L648] EXPR, FCALL \read(*list) [L648] FCALL free(list) [L649] FCALL list = next - 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: [L620] int c = 0; [L637] FCALL struct item *list = ((void *)0); [L638] int length = 0; [L640] CALL append(&list) [L627] c++ [L628] EXPR, FCALL malloc(sizeof *item) [L628] struct item *item = malloc(sizeof *item); [L629] EXPR, FCALL \read(**plist) [L629] FCALL item->next = *plist [L630] EXPR, FCALL item->next [L630-L632] COND FALSE, EXPR !((item->next) ? item->next->data : malloc(sizeof *item)) [L632] EXPR, FCALL malloc(sizeof *item) [L630-L632] EXPR (item->next) ? item->next->data : malloc(sizeof *item) [L630-L632] FCALL item->data = (item->next) ? item->next->data : malloc(sizeof *item) [L633] RET, FCALL *plist = item [L640] append(&list) [L641] length++ [L642] COND FALSE !(__VERIFIER_nondet_int() && c < 20) [L643] COND TRUE length > 0 [L644] COND FALSE !(length < 0) [L647] EXPR, FCALL \read(*list) [L647] EXPR, FCALL list->next [L647] struct item *next = list->next; [L648] EXPR, FCALL \read(*list) [L648] FCALL free(list) [L649] FCALL list = next - 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: [L620] int c = 0; [L637] FCALL struct item *list = ((void *)0); [L638] int length = 0; [L640] CALL append(&list) [L627] c++ [L628] EXPR, FCALL malloc(sizeof *item) [L628] struct item *item = malloc(sizeof *item); [L629] EXPR, FCALL \read(**plist) [L629] FCALL item->next = *plist [L630] EXPR, FCALL item->next [L630-L632] COND FALSE, EXPR !((item->next) ? item->next->data : malloc(sizeof *item)) [L632] EXPR, FCALL malloc(sizeof *item) [L630-L632] EXPR (item->next) ? item->next->data : malloc(sizeof *item) [L630-L632] FCALL item->data = (item->next) ? item->next->data : malloc(sizeof *item) [L633] RET, FCALL *plist = item [L640] append(&list) [L641] length++ [L642] COND FALSE !(__VERIFIER_nondet_int() && c < 20) [L643] COND FALSE !(length > 0) [L652] COND TRUE length > 0 [L653] EXPR, FCALL \read(*list) [L653] EXPR, FCALL list->next [L653] struct item *next = list->next; [L654] EXPR, FCALL \read(*list) [L654] FCALL free(list) [L655] FCALL list = next - 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: [L620] int c = 0; [L637] FCALL struct item *list = ((void *)0); [L638] int length = 0; [L640] CALL append(&list) [L627] c++ [L628] EXPR, FCALL malloc(sizeof *item) [L628] struct item *item = malloc(sizeof *item); [L629] EXPR, FCALL \read(**plist) [L629] FCALL item->next = *plist [L630] EXPR, FCALL item->next [L630-L632] COND FALSE, EXPR !((item->next) ? item->next->data : malloc(sizeof *item)) [L632] EXPR, FCALL malloc(sizeof *item) [L630-L632] EXPR (item->next) ? item->next->data : malloc(sizeof *item) [L630-L632] FCALL item->data = (item->next) ? item->next->data : malloc(sizeof *item) [L633] RET, FCALL *plist = item [L640] append(&list) [L641] length++ [L642] COND FALSE !(__VERIFIER_nondet_int() && c < 20) [L643] COND FALSE !(length > 0) [L652] COND TRUE length > 0 [L653] EXPR, FCALL \read(*list) [L653] EXPR, FCALL list->next [L653] struct item *next = list->next; [L654] EXPR, FCALL \read(*list) [L654] FCALL free(list) [L655] FCALL list = next - 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: [L620] int c = 0; [L637] FCALL struct item *list = ((void *)0); [L638] int length = 0; [L640] CALL append(&list) [L627] c++ [L628] EXPR, FCALL malloc(sizeof *item) [L628] struct item *item = malloc(sizeof *item); [L629] EXPR, FCALL \read(**plist) [L629] FCALL item->next = *plist [L630] EXPR, FCALL item->next [L630-L632] COND FALSE, EXPR !((item->next) ? item->next->data : malloc(sizeof *item)) [L632] EXPR, FCALL malloc(sizeof *item) [L630-L632] EXPR (item->next) ? item->next->data : malloc(sizeof *item) [L630-L632] FCALL item->data = (item->next) ? item->next->data : malloc(sizeof *item) [L633] RET, FCALL *plist = item [L640] append(&list) [L641] length++ [L642] COND TRUE __VERIFIER_nondet_int() && c < 20 [L640] CALL append(&list) [L627] c++ [L628] EXPR, FCALL malloc(sizeof *item) [L628] struct item *item = malloc(sizeof *item); [L629] EXPR, FCALL \read(**plist) [L629] FCALL item->next = *plist [L630] EXPR, FCALL item->next [L630-L632] COND TRUE (item->next) ? item->next->data : malloc(sizeof *item) [L631] FCALL item->next - 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: [L620] int c = 0; [L637] FCALL struct item *list = ((void *)0); [L638] int length = 0; [L640] CALL append(&list) [L627] c++ [L628] EXPR, FCALL malloc(sizeof *item) [L628] struct item *item = malloc(sizeof *item); [L629] EXPR, FCALL \read(**plist) [L629] FCALL item->next = *plist [L630] EXPR, FCALL item->next [L630-L632] COND FALSE, EXPR !((item->next) ? item->next->data : malloc(sizeof *item)) [L632] EXPR, FCALL malloc(sizeof *item) [L630-L632] EXPR (item->next) ? item->next->data : malloc(sizeof *item) [L630-L632] FCALL item->data = (item->next) ? item->next->data : malloc(sizeof *item) [L633] RET, FCALL *plist = item [L640] append(&list) [L641] length++ [L642] COND TRUE __VERIFIER_nondet_int() && c < 20 [L640] CALL append(&list) [L627] c++ [L628] EXPR, FCALL malloc(sizeof *item) [L628] struct item *item = malloc(sizeof *item); [L629] EXPR, FCALL \read(**plist) [L629] FCALL item->next = *plist [L630] EXPR, FCALL item->next [L630-L632] COND TRUE (item->next) ? item->next->data : malloc(sizeof *item) [L631] EXPR, FCALL item->next [L631] FCALL item->next->data - 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: [L620] int c = 0; [L637] FCALL struct item *list = ((void *)0); [L638] int length = 0; [L640] CALL append(&list) [L627] c++ [L628] EXPR, FCALL malloc(sizeof *item) [L628] struct item *item = malloc(sizeof *item); [L629] EXPR, FCALL \read(**plist) [L629] FCALL item->next = *plist [L630] EXPR, FCALL item->next [L630-L632] COND FALSE, EXPR !((item->next) ? item->next->data : malloc(sizeof *item)) [L632] EXPR, FCALL malloc(sizeof *item) [L630-L632] EXPR (item->next) ? item->next->data : malloc(sizeof *item) [L630-L632] FCALL item->data = (item->next) ? item->next->data : malloc(sizeof *item) [L633] RET, FCALL *plist = item [L640] append(&list) [L641] length++ [L642] COND TRUE __VERIFIER_nondet_int() && c < 20 [L640] CALL append(&list) [L627] c++ [L628] EXPR, FCALL malloc(sizeof *item) [L628] struct item *item = malloc(sizeof *item); [L629] EXPR, FCALL \read(**plist) [L629] FCALL item->next = *plist [L630] EXPR, FCALL item->next [L630-L632] COND TRUE (item->next) ? item->next->data : malloc(sizeof *item) [L631] EXPR, FCALL item->next [L631] FCALL item->next->data - 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: [L620] int c = 0; [L637] FCALL struct item *list = ((void *)0); [L638] int length = 0; [L640] CALL append(&list) [L627] c++ [L628] EXPR, FCALL malloc(sizeof *item) [L628] struct item *item = malloc(sizeof *item); [L629] EXPR, FCALL \read(**plist) [L629] FCALL item->next = *plist [L630] EXPR, FCALL item->next [L630-L632] COND FALSE, EXPR !((item->next) ? item->next->data : malloc(sizeof *item)) [L632] EXPR, FCALL malloc(sizeof *item) [L630-L632] EXPR (item->next) ? item->next->data : malloc(sizeof *item) [L630-L632] FCALL item->data = (item->next) ? item->next->data : malloc(sizeof *item) [L633] RET, FCALL *plist = item [L640] append(&list) [L641] length++ [L642] COND FALSE !(__VERIFIER_nondet_int() && c < 20) [L643] COND TRUE length > 0 [L644] COND FALSE !(length < 0) [L647] EXPR, FCALL \read(*list) [L647] EXPR, FCALL list->next [L647] struct item *next = list->next; [L648] EXPR, FCALL \read(*list) [L648] FCALL free(list) [L649] FCALL list = next [L650] length-- [L652] COND TRUE length > 0 [L653] EXPR, FCALL \read(*list) [L653] FCALL list->next - UnprovableResult [Line: 1]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: abstract domain could reach this error location. Possible FailurePath: [L620] int c = 0; [L637] FCALL struct item *list = ((void *)0); [L638] int length = 0; [L640] CALL append(&list) [L627] c++ [L628] EXPR, FCALL malloc(sizeof *item) [L628] struct item *item = malloc(sizeof *item); [L629] EXPR, FCALL \read(**plist) [L629] FCALL item->next = *plist [L630] EXPR, FCALL item->next [L630-L632] COND FALSE, EXPR !((item->next) ? item->next->data : malloc(sizeof *item)) [L632] EXPR, FCALL malloc(sizeof *item) [L630-L632] EXPR (item->next) ? item->next->data : malloc(sizeof *item) [L630-L632] FCALL item->data = (item->next) ? item->next->data : malloc(sizeof *item) [L633] RET, FCALL *plist = item [L640] append(&list) [L641] length++ [L642] COND FALSE !(__VERIFIER_nondet_int() && c < 20) [L643] COND TRUE length > 0 [L644] COND FALSE !(length < 0) [L647] EXPR, FCALL \read(*list) [L647] EXPR, FCALL list->next [L647] struct item *next = list->next; [L648] EXPR, FCALL \read(*list) [L648] FCALL free(list) [L649] FCALL list = next [L650] length-- [L652] COND TRUE length > 0 [L653] EXPR, FCALL \read(*list) [L653] EXPR, FCALL list->next [L653] struct item *next = list->next; [L654] EXPR, FCALL \read(*list) [L654] FCALL free(list) - 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]: 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]: 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 - 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 * 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/test-0232_1_false-valid-memtrack_true-termination.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Camel+AI_EQ_imprecise.epf_AbstractInterpretationC.xml/Csv-Benchmark-0-2018-01-24_16-28-41-235.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/test-0232_1_false-valid-memtrack_true-termination.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Camel+AI_EQ_imprecise.epf_AbstractInterpretationC.xml/Csv-VPDomainBenchmark-0-2018-01-24_16-28-41-235.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/test-0232_1_false-valid-memtrack_true-termination.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Camel+AI_EQ_imprecise.epf_AbstractInterpretationC.xml/Csv-BenchmarkWithCounters-0-2018-01-24_16-28-41-235.csv Received shutdown request...