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_Array.epf -i ../../../trunk/examples/svcomp/array-memsafety/add_last_unsafe_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-c17473d-m [2018-02-04 14:54:52,686 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-02-04 14:54:52,688 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-02-04 14:54:52,700 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-02-04 14:54:52,701 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-02-04 14:54:52,701 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-02-04 14:54:52,702 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-02-04 14:54:52,704 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-02-04 14:54:52,705 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-02-04 14:54:52,706 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-02-04 14:54:52,706 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-02-04 14:54:52,707 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-02-04 14:54:52,707 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-02-04 14:54:52,708 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-02-04 14:54:52,709 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-02-04 14:54:52,711 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-02-04 14:54:52,713 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-02-04 14:54:52,714 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-02-04 14:54:52,716 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-02-04 14:54:52,717 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-02-04 14:54:52,718 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-02-04 14:54:52,719 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-02-04 14:54:52,719 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-02-04 14:54:52,720 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-02-04 14:54:52,720 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-02-04 14:54:52,721 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-02-04 14:54:52,721 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-02-04 14:54:52,722 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-02-04 14:54:52,722 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-02-04 14:54:52,722 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-02-04 14:54:52,722 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-02-04 14:54:52,723 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_Array.epf [2018-02-04 14:54:52,736 INFO L110 SettingsManager]: Loading preferences was successful [2018-02-04 14:54:52,737 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-02-04 14:54:52,738 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-02-04 14:54:52,738 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-02-04 14:54:52,738 INFO L133 SettingsManager]: * Use SBE=true [2018-02-04 14:54:52,738 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-02-04 14:54:52,738 INFO L133 SettingsManager]: * sizeof long=4 [2018-02-04 14:54:52,738 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-02-04 14:54:52,738 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-02-04 14:54:52,738 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-02-04 14:54:52,738 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-02-04 14:54:52,739 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-02-04 14:54:52,739 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-02-04 14:54:52,739 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-02-04 14:54:52,739 INFO L133 SettingsManager]: * sizeof long double=12 [2018-02-04 14:54:52,739 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-02-04 14:54:52,739 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-02-04 14:54:52,739 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-02-04 14:54:52,739 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-02-04 14:54:52,739 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-02-04 14:54:52,739 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-02-04 14:54:52,740 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_TreeInterpolation [2018-02-04 14:54:52,769 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-02-04 14:54:52,778 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-02-04 14:54:52,781 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-02-04 14:54:52,782 INFO L271 PluginConnector]: Initializing CDTParser... [2018-02-04 14:54:52,783 INFO L276 PluginConnector]: CDTParser initialized [2018-02-04 14:54:52,783 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/add_last_unsafe_false-valid-deref.i [2018-02-04 14:54:52,912 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-02-04 14:54:52,913 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-02-04 14:54:52,914 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-02-04 14:54:52,914 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-02-04 14:54:52,919 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-02-04 14:54:52,920 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.02 02:54:52" (1/1) ... [2018-02-04 14:54:52,923 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fb25181 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 02:54:52, skipping insertion in model container [2018-02-04 14:54:52,923 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.02 02:54:52" (1/1) ... [2018-02-04 14:54:52,934 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-04 14:54:52,962 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-04 14:54:53,049 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-04 14:54:53,062 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-04 14:54:53,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 02:54:53 WrapperNode [2018-02-04 14:54:53,068 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-02-04 14:54:53,068 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-02-04 14:54:53,068 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-02-04 14:54:53,069 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-02-04 14:54:53,081 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 02:54:53" (1/1) ... [2018-02-04 14:54:53,081 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 02:54:53" (1/1) ... [2018-02-04 14:54:53,088 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 02:54:53" (1/1) ... [2018-02-04 14:54:53,088 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 02:54:53" (1/1) ... [2018-02-04 14:54:53,091 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 02:54:53" (1/1) ... [2018-02-04 14:54:53,093 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 02:54:53" (1/1) ... [2018-02-04 14:54:53,094 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 02:54:53" (1/1) ... [2018-02-04 14:54:53,095 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-02-04 14:54:53,096 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-02-04 14:54:53,096 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-02-04 14:54:53,096 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-02-04 14:54:53,096 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 02:54:53" (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 14:54:53,132 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-02-04 14:54:53,132 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-02-04 14:54:53,132 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-02-04 14:54:53,132 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-02-04 14:54:53,133 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-02-04 14:54:53,133 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-02-04 14:54:53,133 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-02-04 14:54:53,133 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-02-04 14:54:53,133 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-02-04 14:54:53,133 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-02-04 14:54:53,133 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-02-04 14:54:53,133 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-02-04 14:54:53,266 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-02-04 14:54:53,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.02 02:54:53 BoogieIcfgContainer [2018-02-04 14:54:53,266 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-02-04 14:54:53,267 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-02-04 14:54:53,267 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-02-04 14:54:53,269 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-02-04 14:54:53,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.02 02:54:52" (1/3) ... [2018-02-04 14:54:53,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19aeb5cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.02 02:54:53, skipping insertion in model container [2018-02-04 14:54:53,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 02:54:53" (2/3) ... [2018-02-04 14:54:53,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19aeb5cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.02 02:54:53, skipping insertion in model container [2018-02-04 14:54:53,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.02 02:54:53" (3/3) ... [2018-02-04 14:54:53,272 INFO L107 eAbstractionObserver]: Analyzing ICFG add_last_unsafe_false-valid-deref.i [2018-02-04 14:54:53,279 INFO L128 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_TreeInterpolation Determinization: PREDICATE_ABSTRACTION [2018-02-04 14:54:53,283 INFO L140 ceAbstractionStarter]: Appying trace abstraction to program that has 11 error locations. [2018-02-04 14:54:53,319 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-02-04 14:54:53,320 INFO L323 AbstractCegarLoop]: Hoare is false [2018-02-04 14:54:53,320 INFO L324 AbstractCegarLoop]: Compute interpolants for Craig_TreeInterpolation [2018-02-04 14:54:53,320 INFO L325 AbstractCegarLoop]: Backedges is CANONICAL [2018-02-04 14:54:53,320 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-02-04 14:54:53,320 INFO L327 AbstractCegarLoop]: Difference is false [2018-02-04 14:54:53,320 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-02-04 14:54:53,320 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-02-04 14:54:53,321 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-02-04 14:54:53,332 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2018-02-04 14:54:53,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-02-04 14:54:53,342 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:54:53,343 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:54:53,343 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr5RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr7RequiresViolation, mainErr9RequiresViolation, mainErr8RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr0RequiresViolation, mainErr10EnsuresViolation]=== [2018-02-04 14:54:53,347 INFO L82 PathProgramCache]: Analyzing trace with hash 756039163, now seen corresponding path program 1 times [2018-02-04 14:54:53,387 INFO L67 tionRefinementEngine]: Using refinement strategy FixedTraceAbstractionRefinementStrategy [2018-02-04 14:54:53,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:54:53,433 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:54:53,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-04 14:54:53,505 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-04 14:54:53,505 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-02-04 14:54:53,506 INFO L142 lantAutomatonBuilder]: Constructing canonical interpolant automaton, with selfloop in false state [2018-02-04 14:54:53,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-04 14:54:53,507 INFO L182 omatonBuilderFactory]: Interpolants [41#true, 42#false, 43#(= 1 (select |#valid| |main_#t~malloc1.base|)), 44#(= 1 (select |#valid| main_~arr~0.base)), 45#(= 1 (select |#valid| main_~a~0.base))] [2018-02-04 14:54:53,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-04 14:54:53,508 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-02-04 14:54:53,517 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-02-04 14:54:53,518 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-02-04 14:54:53,519 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 5 states. [2018-02-04 14:54:53,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:54:53,668 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2018-02-04 14:54:53,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-02-04 14:54:53,669 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2018-02-04 14:54:53,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:54:53,677 INFO L225 Difference]: With dead ends: 33 [2018-02-04 14:54:53,677 INFO L226 Difference]: Without dead ends: 30 [2018-02-04 14:54:53,679 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-02-04 14:54:53,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-02-04 14:54:53,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-02-04 14:54:53,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-02-04 14:54:53,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2018-02-04 14:54:53,705 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 12 [2018-02-04 14:54:53,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:54:53,705 INFO L432 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2018-02-04 14:54:53,705 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-02-04 14:54:53,706 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2018-02-04 14:54:53,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-02-04 14:54:53,706 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:54:53,706 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:54:53,706 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr5RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr7RequiresViolation, mainErr9RequiresViolation, mainErr8RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr0RequiresViolation, mainErr10EnsuresViolation]=== [2018-02-04 14:54:53,706 INFO L82 PathProgramCache]: Analyzing trace with hash 756039164, now seen corresponding path program 1 times [2018-02-04 14:54:53,707 INFO L67 tionRefinementEngine]: Using refinement strategy FixedTraceAbstractionRefinementStrategy [2018-02-04 14:54:53,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-02-04 14:54:53,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-02-04 14:54:53,741 INFO L410 BasicCegarLoop]: Counterexample might be feasible [2018-02-04 14:54:53,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.02 02:54:53 BoogieIcfgContainer [2018-02-04 14:54:53,752 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-02-04 14:54:53,752 INFO L168 Benchmark]: Toolchain (without parser) took 839.77 ms. Allocated memory was 399.5 MB in the beginning and 601.4 MB in the end (delta: 201.9 MB). Free memory was 357.5 MB in the beginning and 564.1 MB in the end (delta: -206.6 MB). There was no memory consumed. Max. memory is 5.3 GB. [2018-02-04 14:54:53,753 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 399.5 MB. Free memory is still 362.8 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-02-04 14:54:53,753 INFO L168 Benchmark]: CACSL2BoogieTranslator took 154.19 ms. Allocated memory is still 399.5 MB. Free memory was 356.2 MB in the beginning and 346.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 5.3 GB. [2018-02-04 14:54:53,754 INFO L168 Benchmark]: Boogie Preprocessor took 26.97 ms. Allocated memory is still 399.5 MB. Free memory was 346.9 MB in the beginning and 344.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 5.3 GB. [2018-02-04 14:54:53,754 INFO L168 Benchmark]: RCFGBuilder took 170.94 ms. Allocated memory is still 399.5 MB. Free memory was 344.3 MB in the beginning and 328.1 MB in the end (delta: 16.2 MB). Peak memory consumption was 16.2 MB. Max. memory is 5.3 GB. [2018-02-04 14:54:53,754 INFO L168 Benchmark]: TraceAbstraction took 485.15 ms. Allocated memory was 399.5 MB in the beginning and 601.4 MB in the end (delta: 201.9 MB). Free memory was 326.8 MB in the beginning and 564.1 MB in the end (delta: -237.3 MB). There was no memory consumed. Max. memory is 5.3 GB. [2018-02-04 14:54:53,756 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 399.5 MB. Free memory is still 362.8 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 154.19 ms. Allocated memory is still 399.5 MB. Free memory was 356.2 MB in the beginning and 346.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 26.97 ms. Allocated memory is still 399.5 MB. Free memory was 346.9 MB in the beginning and 344.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 5.3 GB. * RCFGBuilder took 170.94 ms. Allocated memory is still 399.5 MB. Free memory was 344.3 MB in the beginning and 328.1 MB in the end (delta: 16.2 MB). Peak memory consumption was 16.2 MB. Max. memory is 5.3 GB. * TraceAbstraction took 485.15 ms. Allocated memory was 399.5 MB in the beginning and 601.4 MB in the end (delta: 201.9 MB). Free memory was 326.8 MB in the beginning and 564.1 MB in the end (delta: -237.3 MB). There was no memory consumed. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L541] int i, j; [L542] int length = __VERIFIER_nondet_int(); [L543] COND TRUE length < 1 [L543] length = 1 VAL [length=1] [L544] EXPR, FCALL __builtin_alloca (length) VAL [__builtin_alloca (length)={3:0}, length=1] [L544] int *arr = __builtin_alloca (length); VAL [__builtin_alloca (length)={3:0}, arr={3:0}, length=1] [L545] COND FALSE !(!arr) [L546] int *a = arr; VAL [__builtin_alloca (length)={3:0}, a={3:0}, arr={3:0}, length=1] [L547] FCALL \read(*a) VAL [__builtin_alloca (length)={3:0}, a={3:0}, arr={3:0}, length=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 38 locations, 11 error locations. UNSAFE Result, 0.4s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 19 SDtfs, 46 SDslu, 31 SDs, 0 SdLazy, 37 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 11 ConstructedInterpolants, 0 QuantifiedInterpolants, 297 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Written .csv to /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/add_last_unsafe_false-valid-deref.i_svcomp-DerefFreeMemtrack-32bit-Automizer_SmtInterpol_Array.epf_AutomizerC.xml/Csv-Benchmark-0-2018-02-04_14-54-53-762.csv Written .csv to /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/add_last_unsafe_false-valid-deref.i_svcomp-DerefFreeMemtrack-32bit-Automizer_SmtInterpol_Array.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-02-04_14-54-53-762.csv Received shutdown request...