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/mempurity-32bit-Automizer_Taipan+AI_EQ.epf -i ../../../trunk/examples/svcomp/array-memsafety/cstrchr-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-20 23:24:11,008 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-20 23:24:11,011 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-20 23:24:11,027 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-20 23:24:11,028 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-20 23:24:11,029 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-20 23:24:11,030 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-20 23:24:11,032 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-20 23:24:11,034 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-20 23:24:11,035 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-20 23:24:11,036 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-20 23:24:11,036 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-20 23:24:11,037 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-20 23:24:11,038 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-20 23:24:11,039 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-20 23:24:11,041 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-20 23:24:11,044 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-20 23:24:11,046 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-20 23:24:11,047 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-20 23:24:11,048 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-20 23:24:11,050 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-20 23:24:11,056 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-20 23:24:11,056 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-20 23:24:11,057 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ.epf [2018-01-20 23:24:11,066 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-20 23:24:11,067 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-20 23:24:11,067 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-20 23:24:11,068 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-20 23:24:11,068 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-20 23:24:11,068 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-20 23:24:11,068 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-20 23:24:11,069 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-20 23:24:11,069 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-20 23:24:11,069 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-20 23:24:11,070 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-20 23:24:11,070 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-20 23:24:11,070 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-20 23:24:11,070 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-20 23:24:11,070 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-20 23:24:11,070 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-20 23:24:11,071 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-20 23:24:11,071 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-20 23:24:11,071 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-20 23:24:11,071 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-20 23:24:11,071 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-20 23:24:11,072 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-20 23:24:11,072 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-20 23:24:11,072 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-20 23:24:11,072 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-20 23:24:11,072 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-20 23:24:11,073 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-20 23:24:11,073 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-20 23:24:11,073 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-20 23:24:11,073 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-20 23:24:11,073 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-20 23:24:11,073 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-20 23:24:11,074 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-20 23:24:11,074 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-20 23:24:11,074 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-20 23:24:11,074 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-20 23:24:11,075 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-20 23:24:11,075 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-20 23:24:11,109 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-20 23:24:11,122 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-20 23:24:11,126 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-20 23:24:11,127 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-20 23:24:11,128 INFO L276 PluginConnector]: CDTParser initialized [2018-01-20 23:24:11,128 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/cstrchr-alloca_true-valid-memsafety_true-termination.i [2018-01-20 23:24:11,305 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-20 23:24:11,310 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-20 23:24:11,310 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-20 23:24:11,310 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-20 23:24:11,315 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-20 23:24:11,316 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 11:24:11" (1/1) ... [2018-01-20 23:24:11,318 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@533d743e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:24:11, skipping insertion in model container [2018-01-20 23:24:11,319 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 11:24:11" (1/1) ... [2018-01-20 23:24:11,331 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-20 23:24:11,367 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-20 23:24:11,487 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-20 23:24:11,504 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-20 23:24:11,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:24:11 WrapperNode [2018-01-20 23:24:11,512 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-20 23:24:11,513 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-20 23:24:11,513 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-20 23:24:11,513 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-20 23:24:11,524 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:24:11" (1/1) ... [2018-01-20 23:24:11,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:24:11" (1/1) ... [2018-01-20 23:24:11,533 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:24:11" (1/1) ... [2018-01-20 23:24:11,533 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:24:11" (1/1) ... [2018-01-20 23:24:11,537 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:24:11" (1/1) ... [2018-01-20 23:24:11,540 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:24:11" (1/1) ... [2018-01-20 23:24:11,541 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:24:11" (1/1) ... [2018-01-20 23:24:11,543 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-20 23:24:11,544 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-20 23:24:11,544 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-20 23:24:11,544 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-20 23:24:11,545 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:24:11" (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 [2018-01-20 23:24:11,593 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-20 23:24:11,593 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-20 23:24:11,593 INFO L136 BoogieDeclarations]: Found implementation of procedure cstrchr [2018-01-20 23:24:11,594 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-20 23:24:11,594 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-20 23:24:11,594 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-20 23:24:11,594 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-20 23:24:11,594 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-20 23:24:11,594 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-20 23:24:11,594 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-20 23:24:11,594 INFO L128 BoogieDeclarations]: Found specification of procedure cstrchr [2018-01-20 23:24:11,594 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-20 23:24:11,594 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-20 23:24:11,595 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-20 23:24:11,779 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-20 23:24:11,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 11:24:11 BoogieIcfgContainer [2018-01-20 23:24:11,780 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-20 23:24:11,781 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-20 23:24:11,781 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-20 23:24:11,783 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-20 23:24:11,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.01 11:24:11" (1/3) ... [2018-01-20 23:24:11,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48b17cdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 11:24:11, skipping insertion in model container [2018-01-20 23:24:11,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:24:11" (2/3) ... [2018-01-20 23:24:11,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48b17cdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 11:24:11, skipping insertion in model container [2018-01-20 23:24:11,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 11:24:11" (3/3) ... [2018-01-20 23:24:11,788 INFO L105 eAbstractionObserver]: Analyzing ICFG cstrchr-alloca_true-valid-memsafety_true-termination.i [2018-01-20 23:24:11,797 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-20 23:24:11,805 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-20 23:24:11,858 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 23:24:11,858 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 23:24:11,858 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 23:24:11,858 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 23:24:11,858 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 23:24:11,858 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 23:24:11,859 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 23:24:11,859 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == cstrchrErr0EnsuresViolation======== [2018-01-20 23:24:11,860 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 23:24:11,879 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2018-01-20 23:24:11,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-20 23:24:11,886 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:24:11,888 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 23:24:11,888 INFO L371 AbstractCegarLoop]: === Iteration 1 === [cstrchrErr0EnsuresViolation]=== [2018-01-20 23:24:11,892 INFO L82 PathProgramCache]: Analyzing trace with hash 880221785, now seen corresponding path program 1 times [2018-01-20 23:24:11,894 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:24:11,937 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:24:11,937 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:24:11,937 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:24:11,937 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:24:11,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:24:11,995 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:24:12,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:24:12,036 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 23:24:12,037 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-20 23:24:12,037 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-20 23:24:12,039 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-20 23:24:12,050 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-20 23:24:12,050 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-20 23:24:12,052 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 2 states. [2018-01-20 23:24:12,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:24:12,072 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2018-01-20 23:24:12,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-20 23:24:12,074 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2018-01-20 23:24:12,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:24:12,082 INFO L225 Difference]: With dead ends: 50 [2018-01-20 23:24:12,082 INFO L226 Difference]: Without dead ends: 0 [2018-01-20 23:24:12,086 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-20 23:24:12,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-20 23:24:12,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-20 23:24:12,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-20 23:24:12,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-20 23:24:12,197 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2018-01-20 23:24:12,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:24:12,197 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-20 23:24:12,197 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-20 23:24:12,198 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-20 23:24:12,198 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-20 23:24:12,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-01-20 23:24:12,234 INFO L401 ceAbstractionStarter]: For program point cstrchrEXIT(lines 540 545) no Hoare annotation was computed. [2018-01-20 23:24:12,234 INFO L401 ceAbstractionStarter]: For program point L542(lines 542 543) no Hoare annotation was computed. [2018-01-20 23:24:12,234 INFO L401 ceAbstractionStarter]: For program point L544(line 544) no Hoare annotation was computed. [2018-01-20 23:24:12,234 INFO L404 ceAbstractionStarter]: At program point L542''''''''(lines 542 543) the Hoare annotation is: true [2018-01-20 23:24:12,234 INFO L401 ceAbstractionStarter]: For program point cstrchrFINAL(lines 540 545) no Hoare annotation was computed. [2018-01-20 23:24:12,235 INFO L401 ceAbstractionStarter]: For program point L542'(line 542) no Hoare annotation was computed. [2018-01-20 23:24:12,235 INFO L401 ceAbstractionStarter]: For program point cstrchrErr0EnsuresViolation(lines 540 545) no Hoare annotation was computed. [2018-01-20 23:24:12,235 INFO L401 ceAbstractionStarter]: For program point L542'''''''''(lines 542 543) no Hoare annotation was computed. [2018-01-20 23:24:12,235 INFO L401 ceAbstractionStarter]: For program point L542''(line 542) no Hoare annotation was computed. [2018-01-20 23:24:12,235 INFO L401 ceAbstractionStarter]: For program point L542''''(line 542) no Hoare annotation was computed. [2018-01-20 23:24:12,235 INFO L401 ceAbstractionStarter]: For program point L542''''''(line 542) no Hoare annotation was computed. [2018-01-20 23:24:12,236 INFO L404 ceAbstractionStarter]: At program point cstrchrENTRY(lines 540 545) the Hoare annotation is: true [2018-01-20 23:24:12,236 INFO L401 ceAbstractionStarter]: For program point L544''(line 544) no Hoare annotation was computed. [2018-01-20 23:24:12,236 INFO L401 ceAbstractionStarter]: For program point L542'''(line 542) no Hoare annotation was computed. [2018-01-20 23:24:12,236 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initErr0EnsuresViolation(lines 1 555) no Hoare annotation was computed. [2018-01-20 23:24:12,236 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(lines 1 555) no Hoare annotation was computed. [2018-01-20 23:24:12,236 INFO L404 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(lines 1 555) the Hoare annotation is: true [2018-01-20 23:24:12,237 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(lines 1 555) no Hoare annotation was computed. [2018-01-20 23:24:12,237 INFO L404 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(lines 1 555) the Hoare annotation is: true [2018-01-20 23:24:12,237 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(lines 1 555) no Hoare annotation was computed. [2018-01-20 23:24:12,237 INFO L404 ceAbstractionStarter]: At program point L1(lines 1 555) the Hoare annotation is: true [2018-01-20 23:24:12,237 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startErr0EnsuresViolation(lines 1 555) no Hoare annotation was computed. [2018-01-20 23:24:12,237 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(lines 1 555) no Hoare annotation was computed. [2018-01-20 23:24:12,237 INFO L404 ceAbstractionStarter]: At program point L553(line 553) the Hoare annotation is: true [2018-01-20 23:24:12,238 INFO L401 ceAbstractionStarter]: For program point L552(line 552) no Hoare annotation was computed. [2018-01-20 23:24:12,238 INFO L401 ceAbstractionStarter]: For program point L551'(line 551) no Hoare annotation was computed. [2018-01-20 23:24:12,238 INFO L401 ceAbstractionStarter]: For program point L551(line 551) no Hoare annotation was computed. [2018-01-20 23:24:12,238 INFO L401 ceAbstractionStarter]: For program point L552'(line 552) no Hoare annotation was computed. [2018-01-20 23:24:12,238 INFO L401 ceAbstractionStarter]: For program point L553'(line 553) no Hoare annotation was computed. [2018-01-20 23:24:12,238 INFO L401 ceAbstractionStarter]: For program point mainFINAL(lines 546 555) no Hoare annotation was computed. [2018-01-20 23:24:12,238 INFO L401 ceAbstractionStarter]: For program point L548(lines 548 550) no Hoare annotation was computed. [2018-01-20 23:24:12,238 INFO L401 ceAbstractionStarter]: For program point mainEXIT(lines 546 555) no Hoare annotation was computed. [2018-01-20 23:24:12,238 INFO L404 ceAbstractionStarter]: At program point mainENTRY(lines 546 555) the Hoare annotation is: true [2018-01-20 23:24:12,238 INFO L401 ceAbstractionStarter]: For program point L551''(line 551) no Hoare annotation was computed. [2018-01-20 23:24:12,239 INFO L401 ceAbstractionStarter]: For program point L548''(lines 548 550) no Hoare annotation was computed. [2018-01-20 23:24:12,239 INFO L401 ceAbstractionStarter]: For program point mainErr0EnsuresViolation(lines 546 555) no Hoare annotation was computed. [2018-01-20 23:24:12,242 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 23:24:12,242 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 23:24:12,242 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 23:24:12,242 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 23:24:12,243 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 23:24:12,243 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 23:24:12,243 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 23:24:12,243 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-20 23:24:12,243 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 23:24:12,245 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2018-01-20 23:24:12,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-20 23:24:12,246 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:24:12,246 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-20 23:24:12,246 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-20 23:24:12,246 INFO L82 PathProgramCache]: Analyzing trace with hash 86619, now seen corresponding path program 1 times [2018-01-20 23:24:12,246 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:24:12,248 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:24:12,248 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:24:12,248 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:24:12,248 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:24:12,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 23:24:12,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 23:24:12,280 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-20 23:24:12,285 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 23:24:12,290 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 23:24:12,290 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 23:24:12,290 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 23:24:12,291 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 23:24:12,291 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 23:24:12,291 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 23:24:12,291 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 23:24:12,291 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-20 23:24:12,291 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 23:24:12,293 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2018-01-20 23:24:12,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-20 23:24:12,295 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:24:12,295 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 23:24:12,295 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 23:24:12,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1568748556, now seen corresponding path program 1 times [2018-01-20 23:24:12,295 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:24:12,297 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:24:12,297 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:24:12,297 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:24:12,297 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:24:12,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:24:12,316 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:24:12,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:24:12,338 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 23:24:12,339 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-20 23:24:12,339 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-20 23:24:12,339 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-20 23:24:12,340 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-20 23:24:12,340 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-20 23:24:12,340 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 2 states. [2018-01-20 23:24:12,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:24:12,345 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2018-01-20 23:24:12,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-20 23:24:12,345 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 25 [2018-01-20 23:24:12,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:24:12,348 INFO L225 Difference]: With dead ends: 50 [2018-01-20 23:24:12,348 INFO L226 Difference]: Without dead ends: 32 [2018-01-20 23:24:12,349 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-20 23:24:12,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-01-20 23:24:12,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-01-20 23:24:12,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-01-20 23:24:12,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2018-01-20 23:24:12,360 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 25 [2018-01-20 23:24:12,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:24:12,360 INFO L432 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2018-01-20 23:24:12,360 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-20 23:24:12,360 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2018-01-20 23:24:12,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-01-20 23:24:12,361 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:24:12,362 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 23:24:12,362 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 23:24:12,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1745311519, now seen corresponding path program 1 times [2018-01-20 23:24:12,362 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:24:12,363 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:24:12,363 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:24:12,363 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:24:12,363 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:24:12,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 23:24:12,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 23:24:12,414 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-20 23:24:12,421 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 23:24:12,424 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 23:24:12,425 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 23:24:12,426 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 23:24:12,438 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 23:24:12,438 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 23:24:12,438 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 23:24:12,438 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 23:24:12,438 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 23:24:12,439 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 23:24:12,439 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 23:24:12,439 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-20 23:24:12,439 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 23:24:12,441 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2018-01-20 23:24:12,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-20 23:24:12,442 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:24:12,442 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 23:24:12,443 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-20 23:24:12,443 INFO L82 PathProgramCache]: Analyzing trace with hash -922301782, now seen corresponding path program 1 times [2018-01-20 23:24:12,443 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:24:12,444 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:24:12,444 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:24:12,444 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:24:12,444 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:24:12,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:24:12,457 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:24:12,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:24:12,473 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 23:24:12,473 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-20 23:24:12,473 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-20 23:24:12,473 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-20 23:24:12,474 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-20 23:24:12,474 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-20 23:24:12,474 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 2 states. [2018-01-20 23:24:12,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:24:12,478 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2018-01-20 23:24:12,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-20 23:24:12,478 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 23 [2018-01-20 23:24:12,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:24:12,479 INFO L225 Difference]: With dead ends: 50 [2018-01-20 23:24:12,480 INFO L226 Difference]: Without dead ends: 30 [2018-01-20 23:24:12,480 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-20 23:24:12,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-01-20 23:24:12,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-01-20 23:24:12,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-01-20 23:24:12,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2018-01-20 23:24:12,485 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 23 [2018-01-20 23:24:12,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:24:12,486 INFO L432 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2018-01-20 23:24:12,486 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-20 23:24:12,486 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2018-01-20 23:24:12,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-20 23:24:12,487 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:24:12,487 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 23:24:12,487 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-20 23:24:12,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1933377239, now seen corresponding path program 1 times [2018-01-20 23:24:12,488 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:24:12,488 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:24:12,489 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:24:12,489 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:24:12,489 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:24:12,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:24:12,507 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:24:12,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:24:12,601 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 23:24:12,601 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-20 23:24:12,601 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-20 23:24:12,601 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-20 23:24:12,602 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-20 23:24:12,602 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-20 23:24:12,602 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 4 states. [2018-01-20 23:24:12,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:24:12,717 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-01-20 23:24:12,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-20 23:24:12,718 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2018-01-20 23:24:12,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:24:12,719 INFO L225 Difference]: With dead ends: 30 [2018-01-20 23:24:12,719 INFO L226 Difference]: Without dead ends: 0 [2018-01-20 23:24:12,720 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-20 23:24:12,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-20 23:24:12,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-20 23:24:12,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-20 23:24:12,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-20 23:24:12,721 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2018-01-20 23:24:12,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:24:12,721 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-20 23:24:12,721 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-20 23:24:12,722 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-20 23:24:12,722 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-20 23:24:12,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.01 11:24:12 BoogieIcfgContainer [2018-01-20 23:24:12,725 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-20 23:24:12,726 INFO L168 Benchmark]: Toolchain (without parser) took 1420.01 ms. Allocated memory was 304.6 MB in the beginning and 469.2 MB in the end (delta: 164.6 MB). Free memory was 260.9 MB in the beginning and 400.6 MB in the end (delta: -139.6 MB). Peak memory consumption was 25.0 MB. Max. memory is 5.3 GB. [2018-01-20 23:24:12,727 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 304.6 MB. Free memory is still 266.9 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-20 23:24:12,728 INFO L168 Benchmark]: CACSL2BoogieTranslator took 202.14 ms. Allocated memory is still 304.6 MB. Free memory was 259.9 MB in the beginning and 249.9 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. [2018-01-20 23:24:12,728 INFO L168 Benchmark]: Boogie Preprocessor took 30.86 ms. Allocated memory is still 304.6 MB. Free memory was 249.9 MB in the beginning and 248.9 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 5.3 GB. [2018-01-20 23:24:12,728 INFO L168 Benchmark]: RCFGBuilder took 236.37 ms. Allocated memory is still 304.6 MB. Free memory was 248.9 MB in the beginning and 233.0 MB in the end (delta: 15.9 MB). Peak memory consumption was 15.9 MB. Max. memory is 5.3 GB. [2018-01-20 23:24:12,728 INFO L168 Benchmark]: TraceAbstraction took 943.89 ms. Allocated memory was 304.6 MB in the beginning and 469.2 MB in the end (delta: 164.6 MB). Free memory was 233.0 MB in the beginning and 400.6 MB in the end (delta: -167.6 MB). There was no memory consumed. Max. memory is 5.3 GB. [2018-01-20 23:24:12,730 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 304.6 MB. Free memory is still 266.9 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 202.14 ms. Allocated memory is still 304.6 MB. Free memory was 259.9 MB in the beginning and 249.9 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 30.86 ms. Allocated memory is still 304.6 MB. Free memory was 249.9 MB in the beginning and 248.9 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 5.3 GB. * RCFGBuilder took 236.37 ms. Allocated memory is still 304.6 MB. Free memory was 248.9 MB in the beginning and 233.0 MB in the end (delta: 15.9 MB). Peak memory consumption was 15.9 MB. Max. memory is 5.3 GB. * TraceAbstraction took 943.89 ms. Allocated memory was 304.6 MB in the beginning and 469.2 MB in the end (delta: 164.6 MB). Free memory was 233.0 MB in the beginning and 400.6 MB in the end (delta: -167.6 MB). There was no memory consumed. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 540]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data for error location: cstrchrErr0EnsuresViolation CFG has 4 procedures, 36 locations, 4 error locations. SAFE Result, 0.3s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 38 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 7 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 289 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - CounterExampleResult [Line: 1]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.initErr0EnsuresViolation CFG has 4 procedures, 36 locations, 4 error locations. UNSAFE Result, 0.0s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - CounterExampleResult [Line: 1]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L547] int length = __VERIFIER_nondet_int(); [L548] COND TRUE length < 1 [L549] length = 1 VAL [length=1] [L551] EXPR, FCALL __builtin_alloca (length * sizeof(char)) VAL [__builtin_alloca (length * sizeof(char))={3:0}, length=1] [L551] char* nondetString = (char*) __builtin_alloca (length * sizeof(char)); VAL [__builtin_alloca (length * sizeof(char))={3:0}, length=1, nondetString={3:0}] [L552] FCALL nondetString[length-1] = '\0' VAL [__builtin_alloca (length * sizeof(char))={3:0}, length=1, nondetString={3:0}] [L553] CALL cstrchr(nondetString,__VERIFIER_nondet_int()) VAL [\old(c)=0, s={3:0}] [L542] EXPR, FCALL \read(*s) VAL [\old(c)=0, \read(*s)=0, c=0, s={3:0}, s={3:0}] [L542] *s != '\0' && *s != (char)c VAL [*s != '\0' && *s != (char)c=0, \old(c)=0, \read(*s)=0, c=0, s={3:0}, s={3:0}] [L542] COND FALSE !(*s != '\0' && *s != (char)c) [L544] EXPR, FCALL \read(*s) VAL [\old(c)=0, \read(*s)=0, c=0, s={3:0}, s={3:0}] [L544] COND TRUE, EXPR (*s == c) ? (char *) s : 0 VAL [(*s == c) ? (char *) s : 0={3:0}, \old(c)=0, \read(*s)=0, c=0, s={3:0}, s={3:0}] [L544] RET return ( (*s == c) ? (char *) s : 0 ); [L553] cstrchr(nondetString,__VERIFIER_nondet_int()) VAL [__builtin_alloca (length * sizeof(char))={3:0}, __VERIFIER_nondet_int()=0, cstrchr(nondetString,__VERIFIER_nondet_int())={3:0}, length=1, nondetString={3:0}] [L554] return 0; - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0EnsuresViolation CFG has 4 procedures, 36 locations, 4 error locations. UNSAFE Result, 0.1s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 38 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 54 NumberOfCodeBlocks, 54 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 24 ConstructedInterpolants, 0 QuantifiedInterpolants, 576 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - PositiveResult [Line: 546]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data for error location: mainErr0EnsuresViolation CFG has 4 procedures, 36 locations, 4 error locations. SAFE Result, 0.2s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 65 SDtfs, 16 SDslu, 6 SDs, 0 SdLazy, 32 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 50 NumberOfCodeBlocks, 50 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 48 ConstructedInterpolants, 0 QuantifiedInterpolants, 2252 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - InvariantResult [Line: 542]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be incorrect! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrchr-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-20_23-24-12-739.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrchr-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-20_23-24-12-739.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrchr-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-20_23-24-12-739.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrchr-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-20_23-24-12-739.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrchr-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-3-2018-01-20_23-24-12-739.csv Received shutdown request...