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/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_smtcomp.epf -i ../../../trunk/examples/svcomp/array-memsafety/reverse_array_unsafe_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-25 05:19:23,938 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-25 05:19:23,940 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-25 05:19:23,954 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-25 05:19:23,955 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-25 05:19:23,956 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-25 05:19:23,957 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-25 05:19:23,958 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-25 05:19:23,960 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-25 05:19:23,961 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-25 05:19:23,962 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-25 05:19:23,962 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-25 05:19:23,963 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-25 05:19:23,964 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-25 05:19:23,965 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-25 05:19:23,968 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-25 05:19:23,970 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-25 05:19:23,972 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-25 05:19:23,973 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-25 05:19:23,974 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-25 05:19:23,976 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-25 05:19:23,976 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-25 05:19:23,976 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-25 05:19:23,977 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-25 05:19:23,978 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-25 05:19:23,979 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-25 05:19:23,979 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-25 05:19:23,980 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-25 05:19:23,980 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-25 05:19:23,980 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-25 05:19:23,981 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-25 05:19:23,981 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_smtcomp.epf [2018-01-25 05:19:23,991 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-25 05:19:23,991 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-25 05:19:23,992 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-25 05:19:23,992 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-25 05:19:23,992 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-25 05:19:23,992 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-25 05:19:23,993 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-25 05:19:23,993 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-25 05:19:23,993 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-25 05:19:23,994 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-25 05:19:23,994 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-25 05:19:23,994 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-25 05:19:23,994 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-25 05:19:23,994 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-25 05:19:23,995 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-25 05:19:23,995 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-25 05:19:23,995 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-25 05:19:23,995 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-25 05:19:23,995 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-25 05:19:23,996 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-25 05:19:23,996 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-25 05:19:23,996 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-25 05:19:23,996 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-25 05:19:23,996 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-25 05:19:23,997 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-25 05:19:23,997 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-25 05:19:23,997 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-25 05:19:23,997 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-25 05:19:23,997 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-25 05:19:23,998 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-25 05:19:23,998 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-25 05:19:23,998 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-25 05:19:23,998 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-25 05:19:23,998 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-25 05:19:23,999 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-25 05:19:23,999 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-25 05:19:24,033 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-25 05:19:24,046 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-25 05:19:24,050 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-25 05:19:24,051 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-25 05:19:24,052 INFO L276 PluginConnector]: CDTParser initialized [2018-01-25 05:19:24,053 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/reverse_array_unsafe_false-valid-deref.i [2018-01-25 05:19:24,245 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-25 05:19:24,249 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-25 05:19:24,250 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-25 05:19:24,250 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-25 05:19:24,256 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-25 05:19:24,257 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.01 05:19:24" (1/1) ... [2018-01-25 05:19:24,259 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75d63a1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 05:19:24, skipping insertion in model container [2018-01-25 05:19:24,259 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.01 05:19:24" (1/1) ... [2018-01-25 05:19:24,271 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-25 05:19:24,308 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-25 05:19:24,421 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-25 05:19:24,442 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-25 05:19:24,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 05:19:24 WrapperNode [2018-01-25 05:19:24,449 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-25 05:19:24,450 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-25 05:19:24,450 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-25 05:19:24,450 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-25 05:19:24,461 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 05:19:24" (1/1) ... [2018-01-25 05:19:24,461 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 05:19:24" (1/1) ... [2018-01-25 05:19:24,469 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 05:19:24" (1/1) ... [2018-01-25 05:19:24,469 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 05:19:24" (1/1) ... [2018-01-25 05:19:24,472 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 05:19:24" (1/1) ... [2018-01-25 05:19:24,475 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 05:19:24" (1/1) ... [2018-01-25 05:19:24,476 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 05:19:24" (1/1) ... [2018-01-25 05:19:24,477 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-25 05:19:24,477 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-25 05:19:24,477 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-25 05:19:24,478 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-25 05:19:24,478 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 05:19:24" (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 [2018-01-25 05:19:24,526 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-25 05:19:24,527 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-25 05:19:24,527 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-25 05:19:24,527 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-25 05:19:24,527 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-25 05:19:24,527 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-25 05:19:24,527 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-25 05:19:24,527 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-25 05:19:24,527 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-25 05:19:24,527 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-25 05:19:24,528 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-25 05:19:24,528 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-25 05:19:24,778 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-25 05:19:24,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.01 05:19:24 BoogieIcfgContainer [2018-01-25 05:19:24,780 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-25 05:19:24,781 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-25 05:19:24,781 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-25 05:19:24,783 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-25 05:19:24,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.01 05:19:24" (1/3) ... [2018-01-25 05:19:24,784 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@622ff946 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.01 05:19:24, skipping insertion in model container [2018-01-25 05:19:24,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 05:19:24" (2/3) ... [2018-01-25 05:19:24,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@622ff946 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.01 05:19:24, skipping insertion in model container [2018-01-25 05:19:24,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.01 05:19:24" (3/3) ... [2018-01-25 05:19:24,787 INFO L105 eAbstractionObserver]: Analyzing ICFG reverse_array_unsafe_false-valid-deref.i [2018-01-25 05:19:24,793 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-25 05:19:24,799 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 21 error locations. [2018-01-25 05:19:24,835 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-25 05:19:24,835 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-25 05:19:24,835 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-25 05:19:24,835 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-25 05:19:24,835 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-25 05:19:24,835 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-25 05:19:24,835 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-25 05:19:24,835 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-25 05:19:24,836 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-25 05:19:24,852 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states. [2018-01-25 05:19:24,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-01-25 05:19:24,857 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 05:19:24,858 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 05:19:24,858 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr20EnsuresViolation, mainErr9RequiresViolation, mainErr18RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation, mainErr19RequiresViolation]=== [2018-01-25 05:19:24,862 INFO L82 PathProgramCache]: Analyzing trace with hash -506470517, now seen corresponding path program 1 times [2018-01-25 05:19:24,864 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 05:19:24,904 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 05:19:24,904 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 05:19:24,904 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 05:19:24,904 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 05:19:24,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 05:19:24,959 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 05:19:24,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 05:19:24,996 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 05:19:24,996 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-25 05:19:24,996 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 05:19:24,998 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-25 05:19:25,008 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-25 05:19:25,009 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-25 05:19:25,010 INFO L87 Difference]: Start difference. First operand 63 states. Second operand 2 states. [2018-01-25 05:19:25,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 05:19:25,108 INFO L93 Difference]: Finished difference Result 101 states and 110 transitions. [2018-01-25 05:19:25,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-25 05:19:25,110 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2018-01-25 05:19:25,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 05:19:25,118 INFO L225 Difference]: With dead ends: 101 [2018-01-25 05:19:25,118 INFO L226 Difference]: Without dead ends: 60 [2018-01-25 05:19:25,121 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-25 05:19:25,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-01-25 05:19:25,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-01-25 05:19:25,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-01-25 05:19:25,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2018-01-25 05:19:25,152 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 12 [2018-01-25 05:19:25,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 05:19:25,152 INFO L432 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2018-01-25 05:19:25,152 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-25 05:19:25,152 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2018-01-25 05:19:25,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-25 05:19:25,153 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 05:19:25,153 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 05:19:25,153 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr20EnsuresViolation, mainErr9RequiresViolation, mainErr18RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation, mainErr19RequiresViolation]=== [2018-01-25 05:19:25,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1479258408, now seen corresponding path program 1 times [2018-01-25 05:19:25,154 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 05:19:25,155 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 05:19:25,155 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 05:19:25,155 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 05:19:25,155 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 05:19:25,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 05:19:25,173 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 05:19:25,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 05:19:25,225 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 05:19:25,226 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-25 05:19:25,226 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 05:19:25,227 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-25 05:19:25,228 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-25 05:19:25,228 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-25 05:19:25,228 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand 4 states. [2018-01-25 05:19:25,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 05:19:25,337 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2018-01-25 05:19:25,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-25 05:19:25,354 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-01-25 05:19:25,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 05:19:25,355 INFO L225 Difference]: With dead ends: 60 [2018-01-25 05:19:25,355 INFO L226 Difference]: Without dead ends: 56 [2018-01-25 05:19:25,356 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-25 05:19:25,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-01-25 05:19:25,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-01-25 05:19:25,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-01-25 05:19:25,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2018-01-25 05:19:25,363 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 13 [2018-01-25 05:19:25,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 05:19:25,363 INFO L432 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2018-01-25 05:19:25,363 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-25 05:19:25,364 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2018-01-25 05:19:25,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-25 05:19:25,364 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 05:19:25,364 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 05:19:25,364 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr20EnsuresViolation, mainErr9RequiresViolation, mainErr18RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation, mainErr19RequiresViolation]=== [2018-01-25 05:19:25,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1479258409, now seen corresponding path program 1 times [2018-01-25 05:19:25,365 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 05:19:25,366 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 05:19:25,366 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 05:19:25,366 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 05:19:25,366 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 05:19:25,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 05:19:25,384 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 05:19:25,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 05:19:25,442 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 05:19:25,442 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-25 05:19:25,442 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 05:19:25,443 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-25 05:19:25,443 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-25 05:19:25,443 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-01-25 05:19:25,443 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand 4 states. [2018-01-25 05:19:25,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 05:19:25,498 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2018-01-25 05:19:25,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-25 05:19:25,499 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-01-25 05:19:25,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 05:19:25,500 INFO L225 Difference]: With dead ends: 102 [2018-01-25 05:19:25,500 INFO L226 Difference]: Without dead ends: 68 [2018-01-25 05:19:25,501 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-01-25 05:19:25,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-01-25 05:19:25,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2018-01-25 05:19:25,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-01-25 05:19:25,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2018-01-25 05:19:25,508 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 13 [2018-01-25 05:19:25,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 05:19:25,509 INFO L432 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2018-01-25 05:19:25,509 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-25 05:19:25,509 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2018-01-25 05:19:25,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-25 05:19:25,510 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 05:19:25,510 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 05:19:25,510 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr20EnsuresViolation, mainErr9RequiresViolation, mainErr18RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation, mainErr19RequiresViolation]=== [2018-01-25 05:19:25,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1479258450, now seen corresponding path program 1 times [2018-01-25 05:19:25,511 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 05:19:25,511 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 05:19:25,512 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 05:19:25,512 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 05:19:25,512 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 05:19:25,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-25 05:19:25,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-25 05:19:25,563 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-25 05:19:25,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.01 05:19:25 BoogieIcfgContainer [2018-01-25 05:19:25,585 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-25 05:19:25,586 INFO L168 Benchmark]: Toolchain (without parser) took 1340.15 ms. Allocated memory was 304.6 MB in the beginning and 467.7 MB in the end (delta: 163.1 MB). Free memory was 264.7 MB in the beginning and 408.6 MB in the end (delta: -143.9 MB). Peak memory consumption was 19.2 MB. Max. memory is 5.3 GB. [2018-01-25 05:19:25,587 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 304.6 MB. Free memory is still 270.6 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-25 05:19:25,588 INFO L168 Benchmark]: CACSL2BoogieTranslator took 199.69 ms. Allocated memory is still 304.6 MB. Free memory was 263.7 MB in the beginning and 253.5 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 5.3 GB. [2018-01-25 05:19:25,588 INFO L168 Benchmark]: Boogie Preprocessor took 27.14 ms. Allocated memory is still 304.6 MB. Free memory was 253.5 MB in the beginning and 251.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-25 05:19:25,589 INFO L168 Benchmark]: RCFGBuilder took 302.33 ms. Allocated memory is still 304.6 MB. Free memory was 251.5 MB in the beginning and 232.0 MB in the end (delta: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 5.3 GB. [2018-01-25 05:19:25,589 INFO L168 Benchmark]: TraceAbstraction took 804.62 ms. Allocated memory was 304.6 MB in the beginning and 467.7 MB in the end (delta: 163.1 MB). Free memory was 232.0 MB in the beginning and 408.6 MB in the end (delta: -176.6 MB). There was no memory consumed. Max. memory is 5.3 GB. [2018-01-25 05:19:25,591 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 304.6 MB. Free memory is still 270.6 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 199.69 ms. Allocated memory is still 304.6 MB. Free memory was 263.7 MB in the beginning and 253.5 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 27.14 ms. Allocated memory is still 304.6 MB. Free memory was 253.5 MB in the beginning and 251.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 302.33 ms. Allocated memory is still 304.6 MB. Free memory was 251.5 MB in the beginning and 232.0 MB in the end (delta: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 5.3 GB. * TraceAbstraction took 804.62 ms. Allocated memory was 304.6 MB in the beginning and 467.7 MB in the end (delta: 163.1 MB). Free memory was 232.0 MB in the beginning and 408.6 MB in the end (delta: -176.6 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, tmp; [L542] int length = __VERIFIER_nondet_int(); [L543] COND TRUE length < 1 [L543] length = 1 VAL [length=1] [L544] COND FALSE !(length % 2 == 0) VAL [length=1] [L545] EXPR, FCALL __builtin_alloca (length) VAL [__builtin_alloca (length)={2:0}, length=1] [L545] int *arr = __builtin_alloca (length); [L546] i=0 VAL [__builtin_alloca (length)={2:0}, arr={2:0}, i=0, length=1] [L546] COND TRUE i