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_preciseopt.epf -i ../../../trunk/examples/svcomp/array-memsafety/cstrlen_unsafe_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-25 02:30:06,867 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-25 02:30:06,869 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-25 02:30:06,885 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-25 02:30:06,885 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-25 02:30:06,886 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-25 02:30:06,887 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-25 02:30:06,890 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-25 02:30:06,894 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-25 02:30:06,895 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-25 02:30:06,896 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-25 02:30:06,897 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-25 02:30:06,898 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-25 02:30:06,901 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-25 02:30:06,903 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-25 02:30:06,905 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-25 02:30:06,907 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-25 02:30:06,909 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-25 02:30:06,911 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-25 02:30:06,912 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-25 02:30:06,914 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-25 02:30:06,915 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-25 02:30:06,915 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-25 02:30:06,916 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-25 02:30:06,917 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-25 02:30:06,918 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-25 02:30:06,919 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-25 02:30:06,919 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-25 02:30:06,920 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-25 02:30:06,920 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-25 02:30:06,921 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-25 02:30:06,921 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_preciseopt.epf [2018-01-25 02:30:06,931 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-25 02:30:06,932 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-25 02:30:06,932 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-25 02:30:06,933 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-25 02:30:06,933 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-25 02:30:06,933 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-25 02:30:06,933 INFO L133 SettingsManager]: * Flatten before fatten=true [2018-01-25 02:30:06,934 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-25 02:30:06,934 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-25 02:30:06,934 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-25 02:30:06,935 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-25 02:30:06,935 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-25 02:30:06,935 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-25 02:30:06,935 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-25 02:30:06,935 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-25 02:30:06,936 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-25 02:30:06,936 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-25 02:30:06,936 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-25 02:30:06,936 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-25 02:30:06,936 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-25 02:30:06,937 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-25 02:30:06,937 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-25 02:30:06,937 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-25 02:30:06,937 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-25 02:30:06,937 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-25 02:30:06,938 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-25 02:30:06,938 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-25 02:30:06,938 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-25 02:30:06,938 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-25 02:30:06,939 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-25 02:30:06,939 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-25 02:30:06,939 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-25 02:30:06,939 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-25 02:30:06,939 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-25 02:30:06,939 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-25 02:30:06,940 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-25 02:30:06,941 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-25 02:30:06,989 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-25 02:30:07,003 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-25 02:30:07,007 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-25 02:30:07,009 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-25 02:30:07,009 INFO L276 PluginConnector]: CDTParser initialized [2018-01-25 02:30:07,010 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/cstrlen_unsafe_false-valid-deref.i [2018-01-25 02:30:07,257 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-25 02:30:07,266 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-25 02:30:07,267 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-25 02:30:07,268 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-25 02:30:07,280 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-25 02:30:07,288 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.01 02:30:07" (1/1) ... [2018-01-25 02:30:07,297 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@432f9c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:30:07, skipping insertion in model container [2018-01-25 02:30:07,297 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.01 02:30:07" (1/1) ... [2018-01-25 02:30:07,319 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-25 02:30:07,422 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-25 02:30:07,608 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-25 02:30:07,624 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-25 02:30:07,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:30:07 WrapperNode [2018-01-25 02:30:07,631 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-25 02:30:07,632 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-25 02:30:07,632 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-25 02:30:07,632 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-25 02:30:07,650 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:30:07" (1/1) ... [2018-01-25 02:30:07,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:30:07" (1/1) ... [2018-01-25 02:30:07,661 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:30:07" (1/1) ... [2018-01-25 02:30:07,662 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:30:07" (1/1) ... [2018-01-25 02:30:07,666 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:30:07" (1/1) ... [2018-01-25 02:30:07,670 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:30:07" (1/1) ... [2018-01-25 02:30:07,672 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:30:07" (1/1) ... [2018-01-25 02:30:07,673 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-25 02:30:07,674 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-25 02:30:07,674 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-25 02:30:07,674 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-25 02:30:07,675 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:30:07" (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 02:30:07,738 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-25 02:30:07,738 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-25 02:30:07,739 INFO L136 BoogieDeclarations]: Found implementation of procedure build_nondet_String [2018-01-25 02:30:07,739 INFO L136 BoogieDeclarations]: Found implementation of procedure cstrlen [2018-01-25 02:30:07,739 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-25 02:30:07,753 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-25 02:30:07,753 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-25 02:30:07,753 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-25 02:30:07,754 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-25 02:30:07,754 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-25 02:30:07,754 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-25 02:30:07,754 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-25 02:30:07,754 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-25 02:30:07,754 INFO L128 BoogieDeclarations]: Found specification of procedure build_nondet_String [2018-01-25 02:30:07,754 INFO L128 BoogieDeclarations]: Found specification of procedure cstrlen [2018-01-25 02:30:07,755 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-25 02:30:07,755 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-25 02:30:07,755 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-25 02:30:08,000 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-25 02:30:08,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.01 02:30:08 BoogieIcfgContainer [2018-01-25 02:30:08,001 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-25 02:30:08,001 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-25 02:30:08,002 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-25 02:30:08,003 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-25 02:30:08,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.01 02:30:07" (1/3) ... [2018-01-25 02:30:08,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6afed167 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.01 02:30:08, skipping insertion in model container [2018-01-25 02:30:08,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:30:07" (2/3) ... [2018-01-25 02:30:08,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6afed167 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.01 02:30:08, skipping insertion in model container [2018-01-25 02:30:08,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.01 02:30:08" (3/3) ... [2018-01-25 02:30:08,007 INFO L105 eAbstractionObserver]: Analyzing ICFG cstrlen_unsafe_false-valid-deref.i [2018-01-25 02:30:08,014 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-25 02:30:08,021 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2018-01-25 02:30:08,069 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-25 02:30:08,070 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-25 02:30:08,070 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-25 02:30:08,070 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-25 02:30:08,070 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-25 02:30:08,070 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-25 02:30:08,071 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-25 02:30:08,071 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-25 02:30:08,072 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-25 02:30:08,094 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2018-01-25 02:30:08,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-01-25 02:30:08,101 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:30:08,102 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 02:30:08,103 INFO L371 AbstractCegarLoop]: === Iteration 1 === [build_nondet_StringErr0RequiresViolation, build_nondet_StringErr1RequiresViolation, cstrlenErr1RequiresViolation, cstrlenErr0RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-25 02:30:08,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1546631509, now seen corresponding path program 1 times [2018-01-25 02:30:08,112 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:30:08,166 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:30:08,166 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:30:08,166 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:30:08,166 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:30:08,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 02:30:08,223 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 02:30:08,308 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 02:30:08,311 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 02:30:08,311 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-25 02:30:08,311 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 02:30:08,315 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-25 02:30:08,332 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-25 02:30:08,333 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-25 02:30:08,336 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 4 states. [2018-01-25 02:30:08,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 02:30:08,451 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2018-01-25 02:30:08,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-25 02:30:08,453 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2018-01-25 02:30:08,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 02:30:08,528 INFO L225 Difference]: With dead ends: 50 [2018-01-25 02:30:08,529 INFO L226 Difference]: Without dead ends: 33 [2018-01-25 02:30:08,533 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 02:30:08,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-01-25 02:30:08,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-01-25 02:30:08,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-01-25 02:30:08,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-01-25 02:30:08,567 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 11 [2018-01-25 02:30:08,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 02:30:08,567 INFO L432 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-01-25 02:30:08,567 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-25 02:30:08,567 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-01-25 02:30:08,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-01-25 02:30:08,568 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:30:08,568 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 02:30:08,568 INFO L371 AbstractCegarLoop]: === Iteration 2 === [build_nondet_StringErr0RequiresViolation, build_nondet_StringErr1RequiresViolation, cstrlenErr1RequiresViolation, cstrlenErr0RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-25 02:30:08,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1546631508, now seen corresponding path program 1 times [2018-01-25 02:30:08,569 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:30:08,570 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:30:08,570 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:30:08,570 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:30:08,571 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:30:08,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 02:30:08,589 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 02:30:08,817 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 02:30:08,818 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 02:30:08,818 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-25 02:30:08,818 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 02:30:08,819 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-25 02:30:08,819 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-25 02:30:08,820 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-25 02:30:08,820 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 5 states. [2018-01-25 02:30:08,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 02:30:08,858 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-01-25 02:30:08,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-25 02:30:08,859 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-01-25 02:30:08,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 02:30:08,860 INFO L225 Difference]: With dead ends: 33 [2018-01-25 02:30:08,861 INFO L226 Difference]: Without dead ends: 32 [2018-01-25 02:30:08,864 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 [2018-01-25 02:30:08,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-01-25 02:30:08,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-01-25 02:30:08,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-01-25 02:30:08,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2018-01-25 02:30:08,870 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 11 [2018-01-25 02:30:08,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 02:30:08,871 INFO L432 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2018-01-25 02:30:08,871 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-25 02:30:08,871 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2018-01-25 02:30:08,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-25 02:30:08,872 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:30:08,872 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 02:30:08,872 INFO L371 AbstractCegarLoop]: === Iteration 3 === [build_nondet_StringErr0RequiresViolation, build_nondet_StringErr1RequiresViolation, cstrlenErr1RequiresViolation, cstrlenErr0RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-25 02:30:08,872 INFO L82 PathProgramCache]: Analyzing trace with hash -496824236, now seen corresponding path program 1 times [2018-01-25 02:30:08,873 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:30:08,874 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:30:08,874 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:30:08,874 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:30:08,874 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:30:08,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 02:30:08,893 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 02:30:09,043 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 02:30:09,043 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 02:30:09,044 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-01-25 02:30:09,044 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 02:30:09,044 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-25 02:30:09,044 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-25 02:30:09,045 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-01-25 02:30:09,045 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 8 states. [2018-01-25 02:30:09,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 02:30:09,196 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2018-01-25 02:30:09,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-25 02:30:09,197 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2018-01-25 02:30:09,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 02:30:09,198 INFO L225 Difference]: With dead ends: 32 [2018-01-25 02:30:09,198 INFO L226 Difference]: Without dead ends: 30 [2018-01-25 02:30:09,199 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 [2018-01-25 02:30:09,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-01-25 02:30:09,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-01-25 02:30:09,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-01-25 02:30:09,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-01-25 02:30:09,205 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 19 [2018-01-25 02:30:09,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 02:30:09,205 INFO L432 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-01-25 02:30:09,205 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-25 02:30:09,206 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-01-25 02:30:09,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-25 02:30:09,206 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:30:09,207 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 02:30:09,207 INFO L371 AbstractCegarLoop]: === Iteration 4 === [build_nondet_StringErr0RequiresViolation, build_nondet_StringErr1RequiresViolation, cstrlenErr1RequiresViolation, cstrlenErr0RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-25 02:30:09,208 INFO L82 PathProgramCache]: Analyzing trace with hash -496824235, now seen corresponding path program 1 times [2018-01-25 02:30:09,208 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:30:09,209 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:30:09,209 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:30:09,209 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:30:09,209 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:30:09,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 02:30:09,227 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 02:30:09,457 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 02:30:09,457 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 02:30:09,457 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2018-01-25 02:30:09,458 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 02:30:09,458 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-01-25 02:30:09,458 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-01-25 02:30:09,459 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2018-01-25 02:30:09,459 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 11 states. [2018-01-25 02:30:09,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 02:30:09,777 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2018-01-25 02:30:09,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-25 02:30:09,798 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-01-25 02:30:09,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 02:30:09,801 INFO L225 Difference]: With dead ends: 37 [2018-01-25 02:30:09,802 INFO L226 Difference]: Without dead ends: 35 [2018-01-25 02:30:09,802 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2018-01-25 02:30:09,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-01-25 02:30:09,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2018-01-25 02:30:09,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-01-25 02:30:09,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-01-25 02:30:09,808 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 19 [2018-01-25 02:30:09,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 02:30:09,808 INFO L432 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-01-25 02:30:09,809 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-01-25 02:30:09,809 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-01-25 02:30:09,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-25 02:30:09,810 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:30:09,810 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] [2018-01-25 02:30:09,810 INFO L371 AbstractCegarLoop]: === Iteration 5 === [build_nondet_StringErr0RequiresViolation, build_nondet_StringErr1RequiresViolation, cstrlenErr1RequiresViolation, cstrlenErr0RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-25 02:30:09,810 INFO L82 PathProgramCache]: Analyzing trace with hash -433504008, now seen corresponding path program 1 times [2018-01-25 02:30:09,810 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:30:09,812 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:30:09,812 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:30:09,812 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:30:09,812 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:30:09,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 02:30:09,827 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 02:30:09,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 02:30:09,982 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 02:30:09,982 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-01-25 02:30:09,982 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 02:30:09,983 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-25 02:30:09,983 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-25 02:30:09,983 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2018-01-25 02:30:09,984 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 12 states. [2018-01-25 02:30:10,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 02:30:10,205 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2018-01-25 02:30:10,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-01-25 02:30:10,205 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-01-25 02:30:10,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 02:30:10,206 INFO L225 Difference]: With dead ends: 63 [2018-01-25 02:30:10,206 INFO L226 Difference]: Without dead ends: 51 [2018-01-25 02:30:10,207 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2018-01-25 02:30:10,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-01-25 02:30:10,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2018-01-25 02:30:10,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-01-25 02:30:10,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2018-01-25 02:30:10,212 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 22 [2018-01-25 02:30:10,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 02:30:10,213 INFO L432 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2018-01-25 02:30:10,213 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-25 02:30:10,213 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2018-01-25 02:30:10,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-25 02:30:10,213 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:30:10,214 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] [2018-01-25 02:30:10,214 INFO L371 AbstractCegarLoop]: === Iteration 6 === [build_nondet_StringErr0RequiresViolation, build_nondet_StringErr1RequiresViolation, cstrlenErr1RequiresViolation, cstrlenErr0RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-25 02:30:10,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1713367686, now seen corresponding path program 1 times [2018-01-25 02:30:10,214 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:30:10,215 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:30:10,215 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:30:10,215 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:30:10,215 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:30:10,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-25 02:30:10,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-25 02:30:10,258 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-25 02:30:10,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.01 02:30:10 BoogieIcfgContainer [2018-01-25 02:30:10,281 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-25 02:30:10,281 INFO L168 Benchmark]: Toolchain (without parser) took 3023.49 ms. Allocated memory was 299.9 MB in the beginning and 467.1 MB in the end (delta: 167.2 MB). Free memory was 258.8 MB in the beginning and 422.5 MB in the end (delta: -163.7 MB). Peak memory consumption was 3.6 MB. Max. memory is 5.3 GB. [2018-01-25 02:30:10,282 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 299.9 MB. Free memory is still 264.8 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-25 02:30:10,282 INFO L168 Benchmark]: CACSL2BoogieTranslator took 364.34 ms. Allocated memory is still 299.9 MB. Free memory was 258.8 MB in the beginning and 248.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. [2018-01-25 02:30:10,283 INFO L168 Benchmark]: Boogie Preprocessor took 41.33 ms. Allocated memory is still 299.9 MB. Free memory was 248.8 MB in the beginning and 246.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-25 02:30:10,283 INFO L168 Benchmark]: RCFGBuilder took 326.96 ms. Allocated memory is still 299.9 MB. Free memory was 246.8 MB in the beginning and 231.8 MB in the end (delta: 15.0 MB). Peak memory consumption was 15.0 MB. Max. memory is 5.3 GB. [2018-01-25 02:30:10,283 INFO L168 Benchmark]: TraceAbstraction took 2279.25 ms. Allocated memory was 299.9 MB in the beginning and 467.1 MB in the end (delta: 167.2 MB). Free memory was 229.8 MB in the beginning and 422.5 MB in the end (delta: -192.6 MB). There was no memory consumed. Max. memory is 5.3 GB. [2018-01-25 02:30:10,284 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 299.9 MB. Free memory is still 264.8 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 364.34 ms. Allocated memory is still 299.9 MB. Free memory was 258.8 MB in the beginning and 248.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 41.33 ms. Allocated memory is still 299.9 MB. Free memory was 248.8 MB in the beginning and 246.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 326.96 ms. Allocated memory is still 299.9 MB. Free memory was 246.8 MB in the beginning and 231.8 MB in the end (delta: 15.0 MB). Peak memory consumption was 15.0 MB. Max. memory is 5.3 GB. * TraceAbstraction took 2279.25 ms. Allocated memory was 299.9 MB in the beginning and 467.1 MB in the end (delta: 167.2 MB). Free memory was 229.8 MB in the beginning and 422.5 MB in the end (delta: -192.6 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: [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, 2.2s OverallTime, 6 OverallIterations, 2 TraceHistogramMax, 0.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 123 SDtfs, 96 SDslu, 410 SDs, 0 SdLazy, 316 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 48 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.8s 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, 0.0s SatisfiabilityAnalysisTime, 0.8s 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_preciseopt.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-25_02-30-10-292.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_preciseopt.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-25_02-30-10-292.csv Received shutdown request...