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-properties/simple_built_from_end_true-unreach-call_false-valid-memtrack.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 16:33:24,381 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 16:33:24,382 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 16:33:24,397 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 16:33:24,398 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 16:33:24,399 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 16:33:24,400 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 16:33:24,401 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 16:33:24,403 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 16:33:24,404 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 16:33:24,405 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 16:33:24,405 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 16:33:24,406 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 16:33:24,408 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 16:33:24,408 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 16:33:24,411 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 16:33:24,413 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 16:33:24,415 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 16:33:24,416 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 16:33:24,418 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 16:33:24,420 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-24 16:33:24,425 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 16:33:24,425 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 16:33:24,426 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 16:33:24,434 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 16:33:24,435 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 16:33:24,435 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 16:33:24,435 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 16:33:24,436 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 16:33:24,436 INFO L133 SettingsManager]: * Deactivate Weak Equivalences=true [2018-01-24 16:33:24,436 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 16:33:24,436 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 16:33:24,436 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 16:33:24,436 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 16:33:24,437 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 16:33:24,437 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 16:33:24,437 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 16:33:24,437 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 16:33:24,437 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 16:33:24,437 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 16:33:24,437 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 16:33:24,438 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 16:33:24,438 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 16:33:24,438 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 16:33:24,438 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 16:33:24,438 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 16:33:24,438 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 16:33:24,439 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 16:33:24,439 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 16:33:24,439 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 16:33:24,439 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 16:33:24,439 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 16:33:24,439 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 16:33:24,440 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-24 16:33:24,440 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 16:33:24,440 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 16:33:24,440 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 16:33:24,441 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 16:33:24,441 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 16:33:24,474 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 16:33:24,484 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 16:33:24,488 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 16:33:24,489 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 16:33:24,489 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 16:33:24,490 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/simple_built_from_end_true-unreach-call_false-valid-memtrack.i [2018-01-24 16:33:24,664 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 16:33:24,669 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 16:33:24,670 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 16:33:24,670 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 16:33:24,675 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 16:33:24,676 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 04:33:24" (1/1) ... [2018-01-24 16:33:24,678 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f7832e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:33:24, skipping insertion in model container [2018-01-24 16:33:24,678 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 04:33:24" (1/1) ... [2018-01-24 16:33:24,691 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 16:33:24,728 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 16:33:24,843 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 16:33:24,861 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 16:33:24,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:33:24 WrapperNode [2018-01-24 16:33:24,870 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 16:33:24,870 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 16:33:24,870 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 16:33:24,870 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 16:33:24,881 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:33:24" (1/1) ... [2018-01-24 16:33:24,881 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:33:24" (1/1) ... [2018-01-24 16:33:24,889 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:33:24" (1/1) ... [2018-01-24 16:33:24,890 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:33:24" (1/1) ... [2018-01-24 16:33:24,894 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:33:24" (1/1) ... [2018-01-24 16:33:24,897 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:33:24" (1/1) ... [2018-01-24 16:33:24,898 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:33:24" (1/1) ... [2018-01-24 16:33:24,900 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 16:33:24,901 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 16:33:24,901 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 16:33:24,901 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 16:33:24,902 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:33:24" (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 16:33:24,962 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 16:33:24,962 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 16:33:24,962 INFO L136 BoogieDeclarations]: Found implementation of procedure exit [2018-01-24 16:33:24,962 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 16:33:24,962 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-24 16:33:24,962 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-24 16:33:24,962 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-24 16:33:24,962 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-24 16:33:24,962 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 16:33:24,963 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 16:33:24,963 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 16:33:24,963 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-24 16:33:24,963 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-24 16:33:24,963 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-24 16:33:24,963 INFO L128 BoogieDeclarations]: Found specification of procedure exit [2018-01-24 16:33:24,963 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 16:33:24,963 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 16:33:24,963 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 16:33:25,144 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 16:33:25,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 04:33:25 BoogieIcfgContainer [2018-01-24 16:33:25,145 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 16:33:25,145 INFO L113 PluginConnector]: ------------------------Abstract Interpretation---------------------------- [2018-01-24 16:33:25,145 INFO L271 PluginConnector]: Initializing Abstract Interpretation... [2018-01-24 16:33:25,145 INFO L276 PluginConnector]: Abstract Interpretation initialized [2018-01-24 16:33:25,146 INFO L185 PluginConnector]: Executing the observer AbstractInterpretationRcfgObserver from plugin Abstract Interpretation for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 04:33:25" (1/1) ... [2018-01-24 16:33:25,190 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-24 16:33:25,782 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-24 16:33:25,797 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-24 16:33:25,802 INFO L268 AbstractInterpreter]: Visited 40 different actions 107 times. Merged at 24 different actions 45 times. Never widened. Found 6 fixpoints after 5 different actions. Largest state had 25 variables. [2018-01-24 16:33:25,804 INFO L132 PluginConnector]: ------------------------ END Abstract Interpretation---------------------------- [2018-01-24 16:33:25,805 INFO L168 Benchmark]: Toolchain (without parser) took 1139.95 ms. Allocated memory was 306.7 MB in the beginning and 332.9 MB in the end (delta: 26.2 MB). Free memory was 265.7 MB in the beginning and 203.1 MB in the end (delta: 62.7 MB). Peak memory consumption was 88.9 MB. Max. memory is 5.3 GB. [2018-01-24 16:33:25,806 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 306.7 MB. Free memory is still 271.7 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-24 16:33:25,806 INFO L168 Benchmark]: CACSL2BoogieTranslator took 199.86 ms. Allocated memory is still 306.7 MB. Free memory was 265.7 MB in the beginning and 255.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. [2018-01-24 16:33:25,806 INFO L168 Benchmark]: Boogie Preprocessor took 30.11 ms. Allocated memory is still 306.7 MB. Free memory was 255.8 MB in the beginning and 253.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-24 16:33:25,806 INFO L168 Benchmark]: RCFGBuilder took 243.98 ms. Allocated memory is still 306.7 MB. Free memory was 253.8 MB in the beginning and 237.2 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 5.3 GB. [2018-01-24 16:33:25,807 INFO L168 Benchmark]: Abstract Interpretation took 658.99 ms. Allocated memory was 306.7 MB in the beginning and 332.9 MB in the end (delta: 26.2 MB). Free memory was 237.2 MB in the beginning and 203.1 MB in the end (delta: 34.2 MB). Peak memory consumption was 60.4 MB. Max. memory is 5.3 GB. [2018-01-24 16:33:25,808 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 306.7 MB. Free memory is still 271.7 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 199.86 ms. Allocated memory is still 306.7 MB. Free memory was 265.7 MB in the beginning and 255.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 30.11 ms. Allocated memory is still 306.7 MB. Free memory was 255.8 MB in the beginning and 253.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 243.98 ms. Allocated memory is still 306.7 MB. Free memory was 253.8 MB in the beginning and 237.2 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 5.3 GB. * Abstract Interpretation took 658.99 ms. Allocated memory was 306.7 MB in the beginning and 332.9 MB in the end (delta: 26.2 MB). Free memory was 237.2 MB in the beginning and 203.1 MB in the end (delta: 34.2 MB). Peak memory consumption was 60.4 MB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: - StatisticsResult: ArrayEqualityDomainStatistics #Locations : 31 LocStat_MAX_WEQGRAPH_SIZE : 0 LocStat_MAX_SIZEOF_WEQEDGELABEL : 0 LocStat_NO_SUPPORTING_EQUALITIES : 169 LocStat_NO_SUPPORTING_DISEQUALITIES : 19 LocStat_NO_DISJUNCTIONS : -62 LocStat_MAX_NO_DISJUNCTIONS : -1 #Transitions : 44 TransStat_MAX_WEQGRAPH_SIZE : 0 TransStat_MAX_SIZEOF_WEQEDGELABEL : 0 TransStat_NO_SUPPORTING_EQUALITIES : 57 TransStat_NO_SUPPORTING_DISEQUALITIES : 15 TransStat_NO_DISJUNCTIONS : 47 TransStat_MAX_NO_DISJUNCTIONS : 2 - StatisticsResult: EqConstraintFactoryStatistics CONJOIN_DISJUNCTIVE(MILLISECONDS) : 0.368415 RENAME_VARIABLES(MILLISECONDS) : 0.804235 UNFREEZE(MILLISECONDS) : 0.000000 CONJOIN(MILLISECONDS) : 0.314935 PROJECTAWAY(MILLISECONDS) : 0.493871 ADD_WEAK_EQUALITY(MILLISECONDS) : 0.001275 DISJOIN(MILLISECONDS) : 0.550075 RENAME_VARIABLES_DISJUNCTIVE(MILLISECONDS) : 0.842587 ADD_EQUALITY(MILLISECONDS) : 0.013716 DISJOIN_DISJUNCTIVE(MILLISECONDS) : 0.000000 ADD_DISEQUALITY(MILLISECONDS) : 0.044484 #CONJOIN_DISJUNCTIVE : 163 #RENAME_VARIABLES : 317 #UNFREEZE : 0 #CONJOIN : 222 #PROJECTAWAY : 189 #ADD_WEAK_EQUALITY : 15 #DISJOIN : 26 #RENAME_VARIABLES_DISJUNCTIVE : 305 #ADD_EQUALITY : 66 #DISJOIN_DISJUNCTIVE : 0 #ADD_DISEQUALITY : 12 - 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: [L627] List t; [L628] List p = 0; [L629] COND TRUE __VERIFIER_nondet_int() [L630] EXPR, FCALL malloc(sizeof(struct node)) [L630] t = (List) malloc(sizeof(struct node)) [L631] COND FALSE !(t == 0) [L632] FCALL t->h = 1 - 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: [L627] List t; [L628] List p = 0; [L629] COND TRUE __VERIFIER_nondet_int() [L630] EXPR, FCALL malloc(sizeof(struct node)) [L630] t = (List) malloc(sizeof(struct node)) [L631] COND FALSE !(t == 0) [L632] FCALL t->h = 1 [L633] FCALL t->n = p - 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: [L627] List t; [L628] List p = 0; [L629] COND TRUE __VERIFIER_nondet_int() [L630] EXPR, FCALL malloc(sizeof(struct node)) [L630] t = (List) malloc(sizeof(struct node)) [L631] COND FALSE !(t == 0) [L632] FCALL t->h = 1 [L633] FCALL t->n = p [L634] p = t [L629] COND FALSE !(__VERIFIER_nondet_int()) [L636] COND TRUE p!=0 [L637] FCALL p->h - 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: [L627] List t; [L628] List p = 0; [L629] COND TRUE __VERIFIER_nondet_int() [L630] EXPR, FCALL malloc(sizeof(struct node)) [L630] t = (List) malloc(sizeof(struct node)) [L631] COND FALSE !(t == 0) [L632] FCALL t->h = 1 [L633] FCALL t->n = p [L634] p = t [L629] COND FALSE !(__VERIFIER_nondet_int()) [L636] COND TRUE p!=0 [L637] EXPR, FCALL p->h [L637] COND FALSE !(p->h != 1) [L640] FCALL p->n - UnprovableResult [Line: 626]: 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: [L627] List t; [L628] List p = 0; [L629] COND TRUE __VERIFIER_nondet_int() [L630] EXPR, FCALL malloc(sizeof(struct node)) [L630] t = (List) malloc(sizeof(struct node)) [L631] COND FALSE !(t == 0) [L632] FCALL t->h = 1 [L633] FCALL t->n = p [L634] p = t [L629] COND FALSE !(__VERIFIER_nondet_int()) [L636] COND TRUE p!=0 [L637] EXPR, FCALL p->h [L637] COND FALSE !(p->h != 1) [L640] EXPR, FCALL p->n [L640] p = p->n [L636] COND FALSE !(p!=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: [L627] List t; [L628] List p = 0; [L629] COND TRUE __VERIFIER_nondet_int() [L630] EXPR, FCALL malloc(sizeof(struct node)) [L630] t = (List) malloc(sizeof(struct node)) [L631] COND FALSE !(t == 0) [L632] FCALL t->h = 1 [L633] FCALL t->n = p [L634] p = t [L629] COND FALSE !(__VERIFIER_nondet_int()) [L636] COND TRUE p!=0 [L637] EXPR, FCALL p->h [L637] COND FALSE !(p->h != 1) [L640] EXPR, FCALL p->n [L640] p = p->n [L636] COND TRUE p!=0 [L637] FCALL p->h - 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/simple_built_from_end_true-unreach-call_false-valid-memtrack.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Camel+AI_EQ_imprecise.epf_AbstractInterpretationC.xml/Csv-Benchmark-0-2018-01-24_16-33-25-816.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/simple_built_from_end_true-unreach-call_false-valid-memtrack.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Camel+AI_EQ_imprecise.epf_AbstractInterpretationC.xml/Csv-VPDomainBenchmark-0-2018-01-24_16-33-25-816.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/simple_built_from_end_true-unreach-call_false-valid-memtrack.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Camel+AI_EQ_imprecise.epf_AbstractInterpretationC.xml/Csv-BenchmarkWithCounters-0-2018-01-24_16-33-25-816.csv Received shutdown request...