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_precise.epf -i ../../../trunk/examples/svcomp/array-memsafety/cstrlen_unsafe_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 23:05:47,833 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 23:05:47,835 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 23:05:47,847 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 23:05:47,847 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 23:05:47,848 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 23:05:47,849 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 23:05:47,851 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 23:05:47,852 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 23:05:47,853 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 23:05:47,854 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 23:05:47,854 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 23:05:47,854 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 23:05:47,856 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 23:05:47,857 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 23:05:47,859 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 23:05:47,862 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 23:05:47,864 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 23:05:47,865 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 23:05:47,866 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 23:05:47,869 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-24 23:05:47,869 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-24 23:05:47,869 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-24 23:05:47,870 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-24 23:05:47,871 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-24 23:05:47,872 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-24 23:05:47,873 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-24 23:05:47,873 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-24 23:05:47,873 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-24 23:05:47,874 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 23:05:47,874 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 23:05:47,875 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_precise.epf [2018-01-24 23:05:47,884 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 23:05:47,885 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 23:05:47,886 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 23:05:47,886 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 23:05:47,886 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 23:05:47,886 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-24 23:05:47,886 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 23:05:47,887 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 23:05:47,887 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 23:05:47,888 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 23:05:47,888 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 23:05:47,888 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 23:05:47,888 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 23:05:47,888 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 23:05:47,889 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 23:05:47,889 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 23:05:47,889 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 23:05:47,889 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 23:05:47,889 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 23:05:47,890 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 23:05:47,890 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 23:05:47,890 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 23:05:47,890 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 23:05:47,890 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 23:05:47,891 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 23:05:47,891 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 23:05:47,891 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 23:05:47,891 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 23:05:47,891 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 23:05:47,892 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-24 23:05:47,892 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 23:05:47,892 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 23:05:47,892 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 23:05:47,892 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-24 23:05:47,893 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 23:05:47,894 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 23:05:47,930 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 23:05:47,943 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 23:05:47,947 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 23:05:47,949 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 23:05:47,950 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 23:05:47,950 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/cstrlen_unsafe_false-valid-deref.i [2018-01-24 23:05:48,128 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 23:05:48,133 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 23:05:48,134 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 23:05:48,134 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 23:05:48,140 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 23:05:48,141 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 11:05:48" (1/1) ... [2018-01-24 23:05:48,143 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70e2ed18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:05:48, skipping insertion in model container [2018-01-24 23:05:48,144 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 11:05:48" (1/1) ... [2018-01-24 23:05:48,158 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 23:05:48,195 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 23:05:48,311 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 23:05:48,326 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 23:05:48,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:05:48 WrapperNode [2018-01-24 23:05:48,335 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 23:05:48,336 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 23:05:48,336 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 23:05:48,336 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 23:05:48,354 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:05:48" (1/1) ... [2018-01-24 23:05:48,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:05:48" (1/1) ... [2018-01-24 23:05:48,365 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:05:48" (1/1) ... [2018-01-24 23:05:48,365 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:05:48" (1/1) ... [2018-01-24 23:05:48,368 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:05:48" (1/1) ... [2018-01-24 23:05:48,371 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:05:48" (1/1) ... [2018-01-24 23:05:48,372 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:05:48" (1/1) ... [2018-01-24 23:05:48,374 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 23:05:48,374 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 23:05:48,374 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 23:05:48,374 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 23:05:48,375 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:05:48" (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 23:05:48,427 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 23:05:48,428 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 23:05:48,428 INFO L136 BoogieDeclarations]: Found implementation of procedure build_nondet_String [2018-01-24 23:05:48,428 INFO L136 BoogieDeclarations]: Found implementation of procedure cstrlen [2018-01-24 23:05:48,428 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 23:05:48,428 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-24 23:05:48,428 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-24 23:05:48,428 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 23:05:48,428 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 23:05:48,428 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 23:05:48,428 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-24 23:05:48,429 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-24 23:05:48,429 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-24 23:05:48,429 INFO L128 BoogieDeclarations]: Found specification of procedure build_nondet_String [2018-01-24 23:05:48,429 INFO L128 BoogieDeclarations]: Found specification of procedure cstrlen [2018-01-24 23:05:48,429 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 23:05:48,429 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 23:05:48,429 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 23:05:48,604 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 23:05:48,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 11:05:48 BoogieIcfgContainer [2018-01-24 23:05:48,605 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 23:05:48,605 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 23:05:48,605 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 23:05:48,607 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 23:05:48,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 11:05:48" (1/3) ... [2018-01-24 23:05:48,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21121308 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 11:05:48, skipping insertion in model container [2018-01-24 23:05:48,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:05:48" (2/3) ... [2018-01-24 23:05:48,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21121308 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 11:05:48, skipping insertion in model container [2018-01-24 23:05:48,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 11:05:48" (3/3) ... [2018-01-24 23:05:48,610 INFO L105 eAbstractionObserver]: Analyzing ICFG cstrlen_unsafe_false-valid-deref.i [2018-01-24 23:05:48,617 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 23:05:48,623 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2018-01-24 23:05:48,661 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 23:05:48,661 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 23:05:48,662 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 23:05:48,662 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 23:05:48,662 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 23:05:48,662 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 23:05:48,662 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 23:05:48,663 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 23:05:48,663 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 23:05:48,685 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2018-01-24 23:05:48,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-01-24 23:05:48,692 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:05:48,693 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:05:48,694 INFO L371 AbstractCegarLoop]: === Iteration 1 === [build_nondet_StringErr0RequiresViolation, build_nondet_StringErr1RequiresViolation, cstrlenErr1RequiresViolation, cstrlenErr0RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 23:05:48,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1546631509, now seen corresponding path program 1 times [2018-01-24 23:05:48,700 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:05:48,741 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:05:48,741 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:05:48,741 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:05:48,741 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:05:48,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:05:48,804 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:05:48,900 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 23:05:48,903 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:05:48,903 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 23:05:48,903 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:05:48,906 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 23:05:48,922 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 23:05:48,923 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 23:05:48,925 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 4 states. [2018-01-24 23:05:49,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:05:49,023 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2018-01-24 23:05:49,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 23:05:49,087 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2018-01-24 23:05:49,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:05:49,096 INFO L225 Difference]: With dead ends: 50 [2018-01-24 23:05:49,096 INFO L226 Difference]: Without dead ends: 33 [2018-01-24 23:05:49,099 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 23:05:49,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-01-24 23:05:49,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-01-24 23:05:49,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-01-24 23:05:49,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-01-24 23:05:49,128 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 11 [2018-01-24 23:05:49,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:05:49,128 INFO L432 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-01-24 23:05:49,128 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 23:05:49,128 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-01-24 23:05:49,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-01-24 23:05:49,129 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:05:49,129 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:05:49,129 INFO L371 AbstractCegarLoop]: === Iteration 2 === [build_nondet_StringErr0RequiresViolation, build_nondet_StringErr1RequiresViolation, cstrlenErr1RequiresViolation, cstrlenErr0RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 23:05:49,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1546631508, now seen corresponding path program 1 times [2018-01-24 23:05:49,129 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:05:49,130 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:05:49,131 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:05:49,131 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:05:49,131 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:05:49,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:05:49,149 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:05:49,268 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 23:05:49,269 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:05:49,269 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 23:05:49,269 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:05:49,271 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 23:05:49,271 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 23:05:49,271 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 23:05:49,272 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 5 states. [2018-01-24 23:05:49,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:05:49,348 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-01-24 23:05:49,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 23:05:49,348 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-01-24 23:05:49,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:05:49,350 INFO L225 Difference]: With dead ends: 33 [2018-01-24 23:05:49,350 INFO L226 Difference]: Without dead ends: 32 [2018-01-24 23:05:49,351 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-01-24 23:05:49,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-01-24 23:05:49,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-01-24 23:05:49,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-01-24 23:05:49,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2018-01-24 23:05:49,356 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 11 [2018-01-24 23:05:49,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:05:49,357 INFO L432 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2018-01-24 23:05:49,357 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 23:05:49,357 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2018-01-24 23:05:49,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-24 23:05:49,358 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:05:49,358 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:05:49,358 INFO L371 AbstractCegarLoop]: === Iteration 3 === [build_nondet_StringErr0RequiresViolation, build_nondet_StringErr1RequiresViolation, cstrlenErr1RequiresViolation, cstrlenErr0RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 23:05:49,359 INFO L82 PathProgramCache]: Analyzing trace with hash -496824236, now seen corresponding path program 1 times [2018-01-24 23:05:49,359 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:05:49,360 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:05:49,360 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:05:49,360 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:05:49,360 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:05:49,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:05:49,379 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:05:49,502 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 23:05:49,502 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:05:49,502 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-01-24 23:05:49,502 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:05:49,503 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-24 23:05:49,503 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-24 23:05:49,503 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-01-24 23:05:49,503 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 8 states. [2018-01-24 23:05:49,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:05:49,665 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2018-01-24 23:05:49,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-24 23:05:49,666 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2018-01-24 23:05:49,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:05:49,667 INFO L225 Difference]: With dead ends: 32 [2018-01-24 23:05:49,667 INFO L226 Difference]: Without dead ends: 30 [2018-01-24 23:05:49,667 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-01-24 23:05:49,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-01-24 23:05:49,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-01-24 23:05:49,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-01-24 23:05:49,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-01-24 23:05:49,673 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 19 [2018-01-24 23:05:49,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:05:49,673 INFO L432 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-01-24 23:05:49,673 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-24 23:05:49,674 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-01-24 23:05:49,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-24 23:05:49,674 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:05:49,674 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:05:49,675 INFO L371 AbstractCegarLoop]: === Iteration 4 === [build_nondet_StringErr0RequiresViolation, build_nondet_StringErr1RequiresViolation, cstrlenErr1RequiresViolation, cstrlenErr0RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 23:05:49,675 INFO L82 PathProgramCache]: Analyzing trace with hash -496824235, now seen corresponding path program 1 times [2018-01-24 23:05:49,675 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:05:49,676 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:05:49,676 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:05:49,676 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:05:49,677 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:05:49,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:05:49,692 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:05:49,834 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 23:05:49,834 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:05:49,834 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2018-01-24 23:05:49,834 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:05:49,835 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-01-24 23:05:49,835 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-01-24 23:05:49,835 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2018-01-24 23:05:49,835 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 11 states. [2018-01-24 23:05:49,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:05:49,987 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2018-01-24 23:05:49,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-24 23:05:49,987 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-01-24 23:05:49,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:05:49,990 INFO L225 Difference]: With dead ends: 37 [2018-01-24 23:05:49,990 INFO L226 Difference]: Without dead ends: 35 [2018-01-24 23:05:49,990 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2018-01-24 23:05:49,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-01-24 23:05:49,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2018-01-24 23:05:49,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-01-24 23:05:49,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-01-24 23:05:49,996 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 19 [2018-01-24 23:05:49,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:05:49,996 INFO L432 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-01-24 23:05:49,996 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-01-24 23:05:49,997 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-01-24 23:05:49,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-24 23:05:49,997 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:05:49,998 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:05:49,998 INFO L371 AbstractCegarLoop]: === Iteration 5 === [build_nondet_StringErr0RequiresViolation, build_nondet_StringErr1RequiresViolation, cstrlenErr1RequiresViolation, cstrlenErr0RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 23:05:49,998 INFO L82 PathProgramCache]: Analyzing trace with hash -433504008, now seen corresponding path program 1 times [2018-01-24 23:05:49,998 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:05:49,999 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:05:49,999 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:05:49,999 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:05:50,000 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:05:50,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:05:50,015 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:05:50,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:05:50,175 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:05:50,175 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-01-24 23:05:50,175 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:05:50,176 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-24 23:05:50,176 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-24 23:05:50,176 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2018-01-24 23:05:50,176 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 12 states. [2018-01-24 23:05:50,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:05:50,389 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2018-01-24 23:05:50,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-01-24 23:05:50,389 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-01-24 23:05:50,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:05:50,390 INFO L225 Difference]: With dead ends: 63 [2018-01-24 23:05:50,390 INFO L226 Difference]: Without dead ends: 51 [2018-01-24 23:05:50,391 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2018-01-24 23:05:50,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-01-24 23:05:50,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2018-01-24 23:05:50,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-01-24 23:05:50,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2018-01-24 23:05:50,399 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 22 [2018-01-24 23:05:50,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:05:50,400 INFO L432 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2018-01-24 23:05:50,400 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-24 23:05:50,400 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2018-01-24 23:05:50,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-24 23:05:50,401 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:05:50,401 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:05:50,401 INFO L371 AbstractCegarLoop]: === Iteration 6 === [build_nondet_StringErr0RequiresViolation, build_nondet_StringErr1RequiresViolation, cstrlenErr1RequiresViolation, cstrlenErr0RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 23:05:50,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1713367686, now seen corresponding path program 1 times [2018-01-24 23:05:50,402 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:05:50,402 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:05:50,402 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:05:50,403 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:05:50,403 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:05:50,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-24 23:05:50,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-24 23:05:50,449 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-24 23:05:50,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.01 11:05:50 BoogieIcfgContainer [2018-01-24 23:05:50,473 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-24 23:05:50,474 INFO L168 Benchmark]: Toolchain (without parser) took 2345.20 ms. Allocated memory was 306.2 MB in the beginning and 475.0 MB in the end (delta: 168.8 MB). Free memory was 266.3 MB in the beginning and 429.3 MB in the end (delta: -163.1 MB). Peak memory consumption was 5.7 MB. Max. memory is 5.3 GB. [2018-01-24 23:05:50,476 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 306.2 MB. Free memory is still 272.2 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-24 23:05:50,476 INFO L168 Benchmark]: CACSL2BoogieTranslator took 201.83 ms. Allocated memory is still 306.2 MB. Free memory was 265.3 MB in the beginning and 255.1 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 5.3 GB. [2018-01-24 23:05:50,476 INFO L168 Benchmark]: Boogie Preprocessor took 37.58 ms. Allocated memory is still 306.2 MB. Free memory was 255.1 MB in the beginning and 254.1 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 5.3 GB. [2018-01-24 23:05:50,477 INFO L168 Benchmark]: RCFGBuilder took 230.54 ms. Allocated memory is still 306.2 MB. Free memory was 254.1 MB in the beginning and 238.4 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 5.3 GB. [2018-01-24 23:05:50,477 INFO L168 Benchmark]: TraceAbstraction took 1868.04 ms. Allocated memory was 306.2 MB in the beginning and 475.0 MB in the end (delta: 168.8 MB). Free memory was 238.4 MB in the beginning and 429.3 MB in the end (delta: -190.9 MB). There was no memory consumed. Max. memory is 5.3 GB. [2018-01-24 23:05:50,479 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 306.2 MB. Free memory is still 272.2 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 201.83 ms. Allocated memory is still 306.2 MB. Free memory was 265.3 MB in the beginning and 255.1 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 37.58 ms. Allocated memory is still 306.2 MB. Free memory was 255.1 MB in the beginning and 254.1 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 5.3 GB. * RCFGBuilder took 230.54 ms. Allocated memory is still 306.2 MB. Free memory was 254.1 MB in the beginning and 238.4 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 5.3 GB. * TraceAbstraction took 1868.04 ms. Allocated memory was 306.2 MB in the beginning and 475.0 MB in the end (delta: 168.8 MB). Free memory was 238.4 MB in the beginning and 429.3 MB in the end (delta: -190.9 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: [L557] CALL, EXPR build_nondet_String() [L541] int length = __VERIFIER_nondet_int(); [L542] COND FALSE !(length < 1) VAL [length=2] [L545] EXPR, FCALL malloc(length * sizeof(char)) VAL [length=2, malloc(length * sizeof(char))={5:0}] [L545] char* nondetString = (char*) malloc(length * sizeof(char)); VAL [length=2, malloc(length * sizeof(char))={5:0}, nondetString={5:0}] [L546] FCALL nondetString[length-1] = '\0' VAL [length=2, malloc(length * sizeof(char))={5:0}, nondetString={5:0}] [L547] RET return nondetString; VAL [\result={5:0}, length=2, malloc(length * sizeof(char))={5:0}, nondetString={5:0}] [L557] EXPR build_nondet_String() VAL [build_nondet_String()={5:0}] [L557] char* p = build_nondet_String(); [L558] CALL cstrlen(p) VAL [s={5:0}] [L551] const char *p = s; VAL [p={5:0}, s={5:0}, s={5:0}] [L552] EXPR, FCALL \read(*p) VAL [\read(*p)=4, p={5:0}, s={5:0}, s={5:0}] [L552] COND TRUE *p != '\0' [L553] p = p+2 VAL [p={5:2}, s={5:0}, s={5:0}] [L552] FCALL \read(*p) VAL [p={5:2}, s={5:0}, s={5:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 7 error locations. UNSAFE Result, 1.8s OverallTime, 6 OverallIterations, 2 TraceHistogramMax, 0.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 123 SDtfs, 96 SDslu, 410 SDs, 0 SdLazy, 316 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 48 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=5, 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, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 9 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 104 NumberOfCodeBlocks, 104 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 77 ConstructedInterpolants, 0 QuantifiedInterpolants, 5449 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 2/2 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available RESULT: Ultimate proved your program to be incorrect! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrlen_unsafe_false-valid-deref.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_precise.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-24_23-05-50-485.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrlen_unsafe_false-valid-deref.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_precise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-24_23-05-50-485.csv Received shutdown request...