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.epf -i ../../../trunk/examples/svcomp/array-memsafety/reverse_array_unsafe_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 15:11:01,906 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 15:11:01,908 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 15:11:01,923 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 15:11:01,923 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 15:11:01,924 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 15:11:01,925 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 15:11:01,927 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 15:11:01,929 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 15:11:01,930 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 15:11:01,931 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 15:11:01,931 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 15:11:01,932 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 15:11:01,933 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 15:11:01,934 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 15:11:01,936 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 15:11:01,938 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 15:11:01,940 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 15:11:01,942 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 15:11:01,943 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 15:11:01,945 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-24 15:11:01,946 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-24 15:11:01,946 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-24 15:11:01,947 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-24 15:11:01,948 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-24 15:11:01,949 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-24 15:11:01,950 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-24 15:11:01,950 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-24 15:11:01,951 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-24 15:11:01,951 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 15:11:01,951 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 15:11:01,952 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.epf [2018-01-24 15:11:01,962 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 15:11:01,963 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 15:11:01,964 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 15:11:01,964 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 15:11:01,964 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 15:11:01,964 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 15:11:01,964 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 15:11:01,965 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 15:11:01,965 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 15:11:01,965 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 15:11:01,966 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 15:11:01,966 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 15:11:01,966 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 15:11:01,966 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 15:11:01,966 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 15:11:01,967 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 15:11:01,967 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 15:11:01,967 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 15:11:01,967 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 15:11:01,967 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 15:11:01,968 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 15:11:01,968 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 15:11:01,968 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 15:11:01,968 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 15:11:01,968 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 15:11:01,969 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 15:11:01,969 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 15:11:01,969 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 15:11:01,969 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-24 15:11:01,969 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 15:11:01,969 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 15:11:01,970 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 15:11:01,970 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-24 15:11:01,971 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 15:11:01,971 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 15:11:02,007 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 15:11:02,020 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 15:11:02,023 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 15:11:02,024 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 15:11:02,025 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 15:11:02,025 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/reverse_array_unsafe_false-valid-deref.i [2018-01-24 15:11:02,179 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 15:11:02,186 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 15:11:02,187 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 15:11:02,188 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 15:11:02,195 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 15:11:02,196 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 03:11:02" (1/1) ... [2018-01-24 15:11:02,198 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73d2c0ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 03:11:02, skipping insertion in model container [2018-01-24 15:11:02,199 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 03:11:02" (1/1) ... [2018-01-24 15:11:02,217 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 15:11:02,259 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 15:11:02,380 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 15:11:02,403 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 15:11:02,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 03:11:02 WrapperNode [2018-01-24 15:11:02,449 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 15:11:02,449 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 15:11:02,449 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 15:11:02,449 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 15:11:02,462 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 03:11:02" (1/1) ... [2018-01-24 15:11:02,462 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 03:11:02" (1/1) ... [2018-01-24 15:11:02,470 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 03:11:02" (1/1) ... [2018-01-24 15:11:02,470 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 03:11:02" (1/1) ... [2018-01-24 15:11:02,473 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 03:11:02" (1/1) ... [2018-01-24 15:11:02,475 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 03:11:02" (1/1) ... [2018-01-24 15:11:02,477 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 03:11:02" (1/1) ... [2018-01-24 15:11:02,478 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 15:11:02,479 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 15:11:02,479 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 15:11:02,479 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 15:11:02,480 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 03:11:02" (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 15:11:02,527 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 15:11:02,527 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 15:11:02,527 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 15:11:02,527 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-24 15:11:02,527 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-24 15:11:02,528 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 15:11:02,528 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 15:11:02,528 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 15:11:02,528 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-24 15:11:02,528 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 15:11:02,528 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 15:11:02,528 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 15:11:02,793 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 15:11:02,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 03:11:02 BoogieIcfgContainer [2018-01-24 15:11:02,794 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 15:11:02,795 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 15:11:02,795 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 15:11:02,796 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 15:11:02,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 03:11:02" (1/3) ... [2018-01-24 15:11:02,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@280d01b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 03:11:02, skipping insertion in model container [2018-01-24 15:11:02,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 03:11:02" (2/3) ... [2018-01-24 15:11:02,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@280d01b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 03:11:02, skipping insertion in model container [2018-01-24 15:11:02,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 03:11:02" (3/3) ... [2018-01-24 15:11:02,800 INFO L105 eAbstractionObserver]: Analyzing ICFG reverse_array_unsafe_false-valid-deref.i [2018-01-24 15:11:02,806 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 15:11:02,812 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 21 error locations. [2018-01-24 15:11:02,859 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 15:11:02,860 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 15:11:02,860 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 15:11:02,860 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 15:11:02,860 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 15:11:02,861 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 15:11:02,861 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 15:11:02,861 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 15:11:02,862 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 15:11:02,884 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states. [2018-01-24 15:11:02,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-01-24 15:11:02,892 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 15:11:02,893 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 15:11:02,893 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]=== [2018-01-24 15:11:02,898 INFO L82 PathProgramCache]: Analyzing trace with hash -506470517, now seen corresponding path program 1 times [2018-01-24 15:11:02,901 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 15:11:02,961 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 15:11:02,961 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 15:11:02,961 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 15:11:02,961 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 15:11:03,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 15:11:03,031 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 15:11:03,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 15:11:03,074 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 15:11:03,074 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-24 15:11:03,074 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 15:11:03,077 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-24 15:11:03,092 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-24 15:11:03,092 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-24 15:11:03,095 INFO L87 Difference]: Start difference. First operand 63 states. Second operand 2 states. [2018-01-24 15:11:03,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 15:11:03,201 INFO L93 Difference]: Finished difference Result 101 states and 110 transitions. [2018-01-24 15:11:03,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-24 15:11:03,202 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2018-01-24 15:11:03,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 15:11:03,210 INFO L225 Difference]: With dead ends: 101 [2018-01-24 15:11:03,210 INFO L226 Difference]: Without dead ends: 60 [2018-01-24 15:11:03,213 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 [2018-01-24 15:11:03,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-01-24 15:11:03,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-01-24 15:11:03,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-01-24 15:11:03,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2018-01-24 15:11:03,245 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 12 [2018-01-24 15:11:03,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 15:11:03,245 INFO L432 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2018-01-24 15:11:03,245 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-24 15:11:03,246 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2018-01-24 15:11:03,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-24 15:11:03,246 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 15:11:03,246 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 15:11:03,246 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]=== [2018-01-24 15:11:03,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1479258408, now seen corresponding path program 1 times [2018-01-24 15:11:03,247 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 15:11:03,247 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 15:11:03,248 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 15:11:03,248 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 15:11:03,248 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 15:11:03,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 15:11:03,264 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 15:11:03,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 15:11:03,315 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 15:11:03,316 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 15:11:03,316 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 15:11:03,317 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 15:11:03,317 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 15:11:03,317 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 15:11:03,318 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand 4 states. [2018-01-24 15:11:03,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 15:11:03,471 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2018-01-24 15:11:03,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 15:11:03,472 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-01-24 15:11:03,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 15:11:03,473 INFO L225 Difference]: With dead ends: 60 [2018-01-24 15:11:03,473 INFO L226 Difference]: Without dead ends: 56 [2018-01-24 15:11:03,474 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 [2018-01-24 15:11:03,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-01-24 15:11:03,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-01-24 15:11:03,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-01-24 15:11:03,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2018-01-24 15:11:03,481 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 13 [2018-01-24 15:11:03,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 15:11:03,482 INFO L432 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2018-01-24 15:11:03,482 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 15:11:03,482 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2018-01-24 15:11:03,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-24 15:11:03,482 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 15:11:03,483 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 15:11:03,483 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]=== [2018-01-24 15:11:03,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1479258409, now seen corresponding path program 1 times [2018-01-24 15:11:03,483 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 15:11:03,484 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 15:11:03,484 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 15:11:03,484 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 15:11:03,484 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 15:11:03,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 15:11:03,504 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 15:11:03,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 15:11:03,568 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 15:11:03,569 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 15:11:03,569 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 15:11:03,569 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 15:11:03,569 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 15:11:03,569 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-01-24 15:11:03,570 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand 4 states. [2018-01-24 15:11:03,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 15:11:03,645 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2018-01-24 15:11:03,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 15:11:03,645 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-01-24 15:11:03,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 15:11:03,647 INFO L225 Difference]: With dead ends: 102 [2018-01-24 15:11:03,647 INFO L226 Difference]: Without dead ends: 68 [2018-01-24 15:11:03,647 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 [2018-01-24 15:11:03,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-01-24 15:11:03,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2018-01-24 15:11:03,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-01-24 15:11:03,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2018-01-24 15:11:03,655 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 13 [2018-01-24 15:11:03,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 15:11:03,655 INFO L432 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2018-01-24 15:11:03,655 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 15:11:03,655 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2018-01-24 15:11:03,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-24 15:11:03,655 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 15:11:03,655 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 15:11:03,656 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]=== [2018-01-24 15:11:03,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1479258450, now seen corresponding path program 1 times [2018-01-24 15:11:03,656 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 15:11:03,657 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 15:11:03,657 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 15:11:03,657 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 15:11:03,657 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 15:11:03,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-24 15:11:03,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-24 15:11:03,698 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-24 15:11:03,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.01 03:11:03 BoogieIcfgContainer [2018-01-24 15:11:03,717 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-24 15:11:03,718 INFO L168 Benchmark]: Toolchain (without parser) took 1537.74 ms. Allocated memory was 298.8 MB in the beginning and 456.7 MB in the end (delta: 157.8 MB). Free memory was 258.9 MB in the beginning and 397.3 MB in the end (delta: -138.4 MB). Peak memory consumption was 19.5 MB. Max. memory is 5.3 GB. [2018-01-24 15:11:03,719 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 298.8 MB. Free memory is still 264.9 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-24 15:11:03,719 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.38 ms. Allocated memory is still 298.8 MB. Free memory was 257.9 MB in the beginning and 247.8 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 5.3 GB. [2018-01-24 15:11:03,720 INFO L168 Benchmark]: Boogie Preprocessor took 29.20 ms. Allocated memory is still 298.8 MB. Free memory was 247.8 MB in the beginning and 245.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-24 15:11:03,720 INFO L168 Benchmark]: RCFGBuilder took 315.60 ms. Allocated memory is still 298.8 MB. Free memory was 245.8 MB in the beginning and 226.2 MB in the end (delta: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 5.3 GB. [2018-01-24 15:11:03,720 INFO L168 Benchmark]: TraceAbstraction took 922.24 ms. Allocated memory was 298.8 MB in the beginning and 456.7 MB in the end (delta: 157.8 MB). Free memory was 226.2 MB in the beginning and 397.3 MB in the end (delta: -171.0 MB). There was no memory consumed. Max. memory is 5.3 GB. [2018-01-24 15:11:03,723 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 298.8 MB. Free memory is still 264.9 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 261.38 ms. Allocated memory is still 298.8 MB. Free memory was 257.9 MB in the beginning and 247.8 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 29.20 ms. Allocated memory is still 298.8 MB. Free memory was 247.8 MB in the beginning and 245.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 315.60 ms. Allocated memory is still 298.8 MB. Free memory was 245.8 MB in the beginning and 226.2 MB in the end (delta: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 5.3 GB. * TraceAbstraction took 922.24 ms. Allocated memory was 298.8 MB in the beginning and 456.7 MB in the end (delta: 157.8 MB). Free memory was 226.2 MB in the beginning and 397.3 MB in the end (delta: -171.0 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