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/AutomizerC.xml -s ../../../trunk/examples/settings/cade18-smtinterpol/svcomp-DerefFreeMemtrack-32bit-Automizer_SmtInterpol_NoArray.epf -i ../../../trunk/examples/svcomp/array-memsafety/mult_array-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-c17473d-m [2018-02-04 17:25:45,006 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-02-04 17:25:45,007 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-02-04 17:25:45,019 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-02-04 17:25:45,020 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-02-04 17:25:45,020 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-02-04 17:25:45,021 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-02-04 17:25:45,023 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-02-04 17:25:45,024 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-02-04 17:25:45,025 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-02-04 17:25:45,025 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-02-04 17:25:45,026 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-02-04 17:25:45,026 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-02-04 17:25:45,027 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-02-04 17:25:45,028 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-02-04 17:25:45,030 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-02-04 17:25:45,031 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-02-04 17:25:45,033 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-02-04 17:25:45,034 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-02-04 17:25:45,035 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-02-04 17:25:45,036 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-02-04 17:25:45,040 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-02-04 17:25:45,041 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-02-04 17:25:45,041 INFO L98 SettingsManager]: Beginning loading settings from /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/cade18-smtinterpol/svcomp-DerefFreeMemtrack-32bit-Automizer_SmtInterpol_NoArray.epf [2018-02-04 17:25:45,049 INFO L110 SettingsManager]: Loading preferences was successful [2018-02-04 17:25:45,050 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-02-04 17:25:45,050 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-02-04 17:25:45,050 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-02-04 17:25:45,051 INFO L133 SettingsManager]: * Use SBE=true [2018-02-04 17:25:45,051 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-02-04 17:25:45,051 INFO L133 SettingsManager]: * sizeof long=4 [2018-02-04 17:25:45,051 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-02-04 17:25:45,051 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-02-04 17:25:45,051 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-02-04 17:25:45,051 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-02-04 17:25:45,051 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-02-04 17:25:45,051 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-02-04 17:25:45,051 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-02-04 17:25:45,052 INFO L133 SettingsManager]: * sizeof long double=12 [2018-02-04 17:25:45,052 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-02-04 17:25:45,052 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-02-04 17:25:45,052 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-02-04 17:25:45,052 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-02-04 17:25:45,052 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-02-04 17:25:45,052 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-02-04 17:25:45,052 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-02-04 17:25:45,052 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-02-04 17:25:45,052 INFO L133 SettingsManager]: * Trace refinement strategy=SMTINTERPOL [2018-02-04 17:25:45,082 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-02-04 17:25:45,090 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-02-04 17:25:45,092 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-02-04 17:25:45,093 INFO L271 PluginConnector]: Initializing CDTParser... [2018-02-04 17:25:45,094 INFO L276 PluginConnector]: CDTParser initialized [2018-02-04 17:25:45,094 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/mult_array-alloca_true-valid-memsafety_true-termination.i [2018-02-04 17:25:45,221 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-02-04 17:25:45,222 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-02-04 17:25:45,222 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-02-04 17:25:45,222 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-02-04 17:25:45,226 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-02-04 17:25:45,227 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.02 05:25:45" (1/1) ... [2018-02-04 17:25:45,229 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a53858a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 05:25:45, skipping insertion in model container [2018-02-04 17:25:45,229 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.02 05:25:45" (1/1) ... [2018-02-04 17:25:45,239 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-04 17:25:45,266 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-04 17:25:45,355 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-04 17:25:45,369 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-04 17:25:45,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 05:25:45 WrapperNode [2018-02-04 17:25:45,375 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-02-04 17:25:45,376 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-02-04 17:25:45,376 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-02-04 17:25:45,376 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-02-04 17:25:45,384 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 05:25:45" (1/1) ... [2018-02-04 17:25:45,384 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 05:25:45" (1/1) ... [2018-02-04 17:25:45,391 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 05:25:45" (1/1) ... [2018-02-04 17:25:45,391 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 05:25:45" (1/1) ... [2018-02-04 17:25:45,393 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 05:25:45" (1/1) ... [2018-02-04 17:25:45,396 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 05:25:45" (1/1) ... [2018-02-04 17:25:45,397 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 05:25:45" (1/1) ... [2018-02-04 17:25:45,398 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-02-04 17:25:45,399 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-02-04 17:25:45,399 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-02-04 17:25:45,399 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-02-04 17:25:45,400 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 05:25:45" (1/1) ... No working directory specified, using /home/ultimate/work/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 [2018-02-04 17:25:45,437 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-02-04 17:25:45,437 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-02-04 17:25:45,437 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-02-04 17:25:45,437 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-02-04 17:25:45,437 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-02-04 17:25:45,438 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-02-04 17:25:45,438 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-02-04 17:25:45,438 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-02-04 17:25:45,438 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-02-04 17:25:45,438 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-02-04 17:25:45,438 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-02-04 17:25:45,438 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-02-04 17:25:45,584 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-02-04 17:25:45,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.02 05:25:45 BoogieIcfgContainer [2018-02-04 17:25:45,585 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-02-04 17:25:45,585 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-02-04 17:25:45,586 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-02-04 17:25:45,587 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-02-04 17:25:45,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.02 05:25:45" (1/3) ... [2018-02-04 17:25:45,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31500894 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.02 05:25:45, skipping insertion in model container [2018-02-04 17:25:45,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 05:25:45" (2/3) ... [2018-02-04 17:25:45,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31500894 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.02 05:25:45, skipping insertion in model container [2018-02-04 17:25:45,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.02 05:25:45" (3/3) ... [2018-02-04 17:25:45,590 INFO L107 eAbstractionObserver]: Analyzing ICFG mult_array-alloca_true-valid-memsafety_true-termination.i [2018-02-04 17:25:45,596 INFO L128 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-02-04 17:25:45,600 INFO L140 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2018-02-04 17:25:45,622 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-02-04 17:25:45,622 INFO L323 AbstractCegarLoop]: Hoare is false [2018-02-04 17:25:45,622 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-02-04 17:25:45,622 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-02-04 17:25:45,622 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-02-04 17:25:45,622 INFO L327 AbstractCegarLoop]: Difference is false [2018-02-04 17:25:45,622 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-02-04 17:25:45,622 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-02-04 17:25:45,623 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-02-04 17:25:45,630 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2018-02-04 17:25:45,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-02-04 17:25:45,636 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 17:25:45,636 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 17:25:45,637 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr5RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6EnsuresViolation, mainErr0RequiresViolation]=== [2018-02-04 17:25:45,639 INFO L82 PathProgramCache]: Analyzing trace with hash 83465695, now seen corresponding path program 1 times [2018-02-04 17:25:45,640 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS_NO_ARRAY [2018-02-04 17:25:45,641 INFO L67 tionRefinementEngine]: Using refinement strategy SmtInterpolRefinementStrategy [2018-02-04 17:25:45,669 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 17:25:45,670 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 17:25:45,670 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 17:25:45,700 ERROR L243 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-02-04 17:25:45,700 INFO L266 seRefinementStrategy]: Advancing trace checker [2018-02-04 17:25:45,701 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_FP [2018-02-04 17:25:45,701 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 17:25:45,719 ERROR L243 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-02-04 17:25:45,720 INFO L293 seRefinementStrategy]: Strategy SmtInterpolRefinementStrategy was unsuccessful and could not determine trace feasibility. [2018-02-04 17:25:45,720 INFO L410 BasicCegarLoop]: Counterexample might be feasible [2018-02-04 17:25:45,731 WARN L188 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2018-02-04 17:25:45,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.02 05:25:45 BoogieIcfgContainer [2018-02-04 17:25:45,731 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-02-04 17:25:45,732 INFO L168 Benchmark]: Toolchain (without parser) took 510.89 ms. Allocated memory is still 400.0 MB. Free memory was 356.9 MB in the beginning and 313.8 MB in the end (delta: 43.1 MB). Peak memory consumption was 43.1 MB. Max. memory is 5.3 GB. [2018-02-04 17:25:45,733 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 400.0 MB. Free memory is still 362.2 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-02-04 17:25:45,733 INFO L168 Benchmark]: CACSL2BoogieTranslator took 153.46 ms. Allocated memory is still 400.0 MB. Free memory was 356.9 MB in the beginning and 346.3 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 5.3 GB. [2018-02-04 17:25:45,733 INFO L168 Benchmark]: Boogie Preprocessor took 22.59 ms. Allocated memory is still 400.0 MB. Free memory was 346.3 MB in the beginning and 343.7 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 5.3 GB. [2018-02-04 17:25:45,734 INFO L168 Benchmark]: RCFGBuilder took 186.33 ms. Allocated memory is still 400.0 MB. Free memory was 343.7 MB in the beginning and 327.0 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 5.3 GB. [2018-02-04 17:25:45,734 INFO L168 Benchmark]: TraceAbstraction took 146.10 ms. Allocated memory is still 400.0 MB. Free memory was 327.0 MB in the beginning and 313.8 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 5.3 GB. [2018-02-04 17:25:45,736 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 400.0 MB. Free memory is still 362.2 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 153.46 ms. Allocated memory is still 400.0 MB. Free memory was 356.9 MB in the beginning and 346.3 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 22.59 ms. Allocated memory is still 400.0 MB. Free memory was 346.3 MB in the beginning and 343.7 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 5.3 GB. * RCFGBuilder took 186.33 ms. Allocated memory is still 400.0 MB. Free memory was 343.7 MB in the beginning and 327.0 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 5.3 GB. * TraceAbstraction took 146.10 ms. Allocated memory is still 400.0 MB. Free memory was 327.0 MB in the beginning and 313.8 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L541] int i, j; [L542] int length = __VERIFIER_nondet_int(); [L543] COND TRUE length < 1 || length >= 2147483647 / sizeof(int) [L543] length = 1 [L544] int fac = __VERIFIER_nondet_int(); [L545] COND FALSE !(fac < 1 || fac >= 2147483647 / (sizeof(int) * length)) [L546] EXPR, FCALL __builtin_alloca (length*sizeof(int)) [L546] int *arr = __builtin_alloca (length*sizeof(int)); [L547] EXPR, FCALL __builtin_alloca (fac*length*sizeof(int)) [L547] int *arr2 = __builtin_alloca (fac*length*sizeof(int)); [L548] COND FALSE !(!arr || !arr2) [L549] i=0 [L549] COND TRUE i