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_precise.epf -i ../../../trunk/examples/svcomp/array-memsafety/cstrlen-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 05:33:04,491 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 05:33:04,493 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 05:33:04,509 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 05:33:04,510 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 05:33:04,510 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 05:33:04,511 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 05:33:04,514 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 05:33:04,516 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 05:33:04,517 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 05:33:04,518 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 05:33:04,519 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 05:33:04,520 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 05:33:04,521 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 05:33:04,522 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 05:33:04,524 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 05:33:04,527 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 05:33:04,529 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 05:33:04,530 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 05:33:04,532 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 05:33:04,534 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 05:33:04,539 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 05:33:04,540 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 05:33:04,540 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_precise.epf [2018-01-21 05:33:04,549 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 05:33:04,549 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 05:33:04,550 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 05:33:04,550 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 05:33:04,551 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 05:33:04,551 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 05:33:04,551 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 05:33:04,551 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 05:33:04,552 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 05:33:04,552 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 05:33:04,552 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 05:33:04,553 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 05:33:04,553 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 05:33:04,553 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 05:33:04,553 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 05:33:04,553 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 05:33:04,553 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 05:33:04,554 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 05:33:04,554 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 05:33:04,554 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 05:33:04,554 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 05:33:04,554 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 05:33:04,555 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 05:33:04,555 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 05:33:04,555 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 05:33:04,555 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 05:33:04,555 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 05:33:04,556 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 05:33:04,556 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 05:33:04,556 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 05:33:04,556 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 05:33:04,556 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 05:33:04,556 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 05:33:04,557 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 05:33:04,557 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 05:33:04,557 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 05:33:04,557 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 05:33:04,558 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 05:33:04,558 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 05:33:04,591 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 05:33:04,603 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 05:33:04,608 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 05:33:04,609 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 05:33:04,609 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 05:33:04,610 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/cstrlen-alloca_true-valid-memsafety_true-termination.i [2018-01-21 05:33:04,788 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 05:33:04,792 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 05:33:04,793 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 05:33:04,793 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 05:33:04,799 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 05:33:04,800 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 05:33:04" (1/1) ... [2018-01-21 05:33:04,802 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c4d1597 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:33:04, skipping insertion in model container [2018-01-21 05:33:04,802 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 05:33:04" (1/1) ... [2018-01-21 05:33:04,820 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 05:33:04,863 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 05:33:04,981 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 05:33:04,998 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 05:33:05,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:33:05 WrapperNode [2018-01-21 05:33:05,005 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 05:33:05,006 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 05:33:05,006 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 05:33:05,006 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 05:33:05,018 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:33:05" (1/1) ... [2018-01-21 05:33:05,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:33:05" (1/1) ... [2018-01-21 05:33:05,026 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:33:05" (1/1) ... [2018-01-21 05:33:05,026 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:33:05" (1/1) ... [2018-01-21 05:33:05,029 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:33:05" (1/1) ... [2018-01-21 05:33:05,032 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:33:05" (1/1) ... [2018-01-21 05:33:05,033 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:33:05" (1/1) ... [2018-01-21 05:33:05,034 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 05:33:05,035 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 05:33:05,035 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 05:33:05,035 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 05:33:05,036 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:33:05" (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 [2018-01-21 05:33:05,083 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 05:33:05,083 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 05:33:05,083 INFO L136 BoogieDeclarations]: Found implementation of procedure cstrlen [2018-01-21 05:33:05,083 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 05:33:05,083 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 05:33:05,084 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 05:33:05,084 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 05:33:05,084 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 05:33:05,084 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 05:33:05,084 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 05:33:05,084 INFO L128 BoogieDeclarations]: Found specification of procedure cstrlen [2018-01-21 05:33:05,085 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 05:33:05,085 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 05:33:05,085 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 05:33:05,239 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 05:33:05,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 05:33:05 BoogieIcfgContainer [2018-01-21 05:33:05,239 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 05:33:05,240 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 05:33:05,240 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 05:33:05,242 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 05:33:05,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 05:33:04" (1/3) ... [2018-01-21 05:33:05,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10de6206 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 05:33:05, skipping insertion in model container [2018-01-21 05:33:05,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:33:05" (2/3) ... [2018-01-21 05:33:05,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10de6206 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 05:33:05, skipping insertion in model container [2018-01-21 05:33:05,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 05:33:05" (3/3) ... [2018-01-21 05:33:05,245 INFO L105 eAbstractionObserver]: Analyzing ICFG cstrlen-alloca_true-valid-memsafety_true-termination.i [2018-01-21 05:33:05,252 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 05:33:05,259 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-21 05:33:05,311 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 05:33:05,312 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 05:33:05,312 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 05:33:05,312 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 05:33:05,312 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 05:33:05,312 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 05:33:05,312 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 05:33:05,313 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 05:33:05,314 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 05:33:05,335 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2018-01-21 05:33:05,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 05:33:05,342 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:33:05,343 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 05:33:05,343 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 05:33:05,349 INFO L82 PathProgramCache]: Analyzing trace with hash 69194, now seen corresponding path program 1 times [2018-01-21 05:33:05,352 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:33:05,413 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:33:05,413 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:33:05,413 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:33:05,414 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:33:05,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 05:33:05,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 05:33:05,478 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 05:33:05,486 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 05:33:05,493 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 05:33:05,493 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 05:33:05,493 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 05:33:05,493 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 05:33:05,493 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 05:33:05,494 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 05:33:05,494 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 05:33:05,494 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == cstrlenErr0EnsuresViolation======== [2018-01-21 05:33:05,494 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 05:33:05,496 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2018-01-21 05:33:05,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-21 05:33:05,497 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:33:05,497 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 05:33:05,497 INFO L371 AbstractCegarLoop]: === Iteration 1 === [cstrlenErr0EnsuresViolation]=== [2018-01-21 05:33:05,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1765539224, now seen corresponding path program 1 times [2018-01-21 05:33:05,497 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:33:05,499 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:33:05,499 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:33:05,499 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:33:05,499 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:33:05,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:33:05,534 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:33:05,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 05:33:05,572 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:33:05,572 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 05:33:05,572 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:33:05,574 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 05:33:05,587 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 05:33:05,588 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 05:33:05,590 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2018-01-21 05:33:05,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:33:05,694 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2018-01-21 05:33:05,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 05:33:05,695 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2018-01-21 05:33:05,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:33:05,703 INFO L225 Difference]: With dead ends: 41 [2018-01-21 05:33:05,703 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 05:33:05,706 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 [2018-01-21 05:33:05,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 05:33:05,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 05:33:05,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 05:33:05,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 05:33:05,732 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2018-01-21 05:33:05,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:33:05,733 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 05:33:05,733 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 05:33:05,733 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 05:33:05,733 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 05:33:05,735 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 05:33:05,735 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 05:33:05,735 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 05:33:05,735 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 05:33:05,735 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 05:33:05,735 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 05:33:05,735 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 05:33:05,736 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 05:33:05,736 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 05:33:05,736 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2018-01-21 05:33:05,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-21 05:33:05,737 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:33:05,737 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] [2018-01-21 05:33:05,737 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 05:33:05,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1402415957, now seen corresponding path program 1 times [2018-01-21 05:33:05,738 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:33:05,739 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:33:05,739 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:33:05,739 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:33:05,739 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:33:05,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:33:05,750 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:33:05,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 05:33:05,769 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:33:05,769 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 05:33:05,770 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:33:05,770 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 05:33:05,770 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 05:33:05,770 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 05:33:05,771 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2018-01-21 05:33:05,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:33:05,775 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2018-01-21 05:33:05,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 05:33:05,775 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2018-01-21 05:33:05,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:33:05,779 INFO L225 Difference]: With dead ends: 41 [2018-01-21 05:33:05,779 INFO L226 Difference]: Without dead ends: 25 [2018-01-21 05:33:05,780 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 [2018-01-21 05:33:05,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-01-21 05:33:05,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-01-21 05:33:05,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-01-21 05:33:05,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-01-21 05:33:05,789 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2018-01-21 05:33:05,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:33:05,789 INFO L432 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-01-21 05:33:05,789 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 05:33:05,789 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-01-21 05:33:05,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-01-21 05:33:05,790 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:33:05,790 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] [2018-01-21 05:33:05,790 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 05:33:05,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1447957179, now seen corresponding path program 1 times [2018-01-21 05:33:05,791 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:33:05,791 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:33:05,791 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:33:05,792 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:33:05,792 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:33:05,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 05:33:05,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 05:33:05,834 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 05:33:05,840 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 05:33:05,841 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 05:33:05,842 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 05:33:05,842 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 05:33:05,851 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 05:33:05,851 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 05:33:05,851 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 05:33:05,851 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 05:33:05,851 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 05:33:05,851 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 05:33:05,851 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 05:33:05,851 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 05:33:05,851 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 05:33:05,852 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2018-01-21 05:33:05,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-21 05:33:05,853 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:33:05,853 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] [2018-01-21 05:33:05,853 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 05:33:05,853 INFO L82 PathProgramCache]: Analyzing trace with hash 533302314, now seen corresponding path program 1 times [2018-01-21 05:33:05,853 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:33:05,854 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:33:05,854 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:33:05,854 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:33:05,855 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:33:05,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:33:05,866 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:33:05,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 05:33:05,881 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:33:05,881 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 05:33:05,881 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:33:05,882 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 05:33:05,882 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 05:33:05,882 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 05:33:05,883 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2018-01-21 05:33:05,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:33:05,885 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2018-01-21 05:33:05,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 05:33:05,885 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 20 [2018-01-21 05:33:05,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:33:05,886 INFO L225 Difference]: With dead ends: 41 [2018-01-21 05:33:05,886 INFO L226 Difference]: Without dead ends: 23 [2018-01-21 05:33:05,886 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 [2018-01-21 05:33:05,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-01-21 05:33:05,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-01-21 05:33:05,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-01-21 05:33:05,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-01-21 05:33:05,889 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2018-01-21 05:33:05,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:33:05,890 INFO L432 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-01-21 05:33:05,890 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 05:33:05,890 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-01-21 05:33:05,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-21 05:33:05,890 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:33:05,890 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] [2018-01-21 05:33:05,891 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-21 05:33:05,891 INFO L82 PathProgramCache]: Analyzing trace with hash -910224112, now seen corresponding path program 1 times [2018-01-21 05:33:05,891 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:33:05,892 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:33:05,892 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:33:05,892 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:33:05,892 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:33:05,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:33:05,907 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:33:06,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 05:33:06,011 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:33:06,011 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-21 05:33:06,011 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:33:06,011 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-21 05:33:06,012 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-21 05:33:06,012 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-21 05:33:06,012 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 4 states. [2018-01-21 05:33:06,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:33:06,086 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2018-01-21 05:33:06,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 05:33:06,087 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2018-01-21 05:33:06,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:33:06,087 INFO L225 Difference]: With dead ends: 23 [2018-01-21 05:33:06,087 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 05:33:06,088 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 [2018-01-21 05:33:06,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 05:33:06,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 05:33:06,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 05:33:06,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 05:33:06,089 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2018-01-21 05:33:06,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:33:06,089 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 05:33:06,089 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-21 05:33:06,089 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 05:33:06,089 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 05:33:06,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.01 05:33:06 BoogieIcfgContainer [2018-01-21 05:33:06,091 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-21 05:33:06,092 INFO L168 Benchmark]: Toolchain (without parser) took 1303.63 ms. Allocated memory was 302.0 MB in the beginning and 460.8 MB in the end (delta: 158.9 MB). Free memory was 259.3 MB in the beginning and 398.6 MB in the end (delta: -139.3 MB). Peak memory consumption was 19.6 MB. Max. memory is 5.3 GB. [2018-01-21 05:33:06,093 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 302.0 MB. Free memory is still 265.3 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-21 05:33:06,093 INFO L168 Benchmark]: CACSL2BoogieTranslator took 212.63 ms. Allocated memory is still 302.0 MB. Free memory was 259.3 MB in the beginning and 249.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. [2018-01-21 05:33:06,093 INFO L168 Benchmark]: Boogie Preprocessor took 28.40 ms. Allocated memory is still 302.0 MB. Free memory was 249.3 MB in the beginning and 247.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-21 05:33:06,094 INFO L168 Benchmark]: RCFGBuilder took 204.84 ms. Allocated memory is still 302.0 MB. Free memory was 247.3 MB in the beginning and 234.5 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 5.3 GB. [2018-01-21 05:33:06,094 INFO L168 Benchmark]: TraceAbstraction took 851.15 ms. Allocated memory was 302.0 MB in the beginning and 460.8 MB in the end (delta: 158.9 MB). Free memory was 234.5 MB in the beginning and 398.6 MB in the end (delta: -164.1 MB). There was no memory consumed. Max. memory is 5.3 GB. [2018-01-21 05:33:06,097 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 302.0 MB. Free memory is still 265.3 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 212.63 ms. Allocated memory is still 302.0 MB. Free memory was 259.3 MB in the beginning and 249.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 28.40 ms. Allocated memory is still 302.0 MB. Free memory was 249.3 MB in the beginning and 247.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 204.84 ms. Allocated memory is still 302.0 MB. Free memory was 247.3 MB in the beginning and 234.5 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 5.3 GB. * TraceAbstraction took 851.15 ms. Allocated memory was 302.0 MB in the beginning and 460.8 MB in the end (delta: 158.9 MB). Free memory was 234.5 MB in the beginning and 398.6 MB in the end (delta: -164.1 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: - 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, 29 locations, 4 error locations. UNSAFE Result, 0.1s 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=29occurred 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 - 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: cstrlenErr0EnsuresViolation CFG has 4 procedures, 29 locations, 4 error locations. SAFE Result, 0.2s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 29 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=29occurred 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, 15 NumberOfCodeBlocks, 15 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 14 ConstructedInterpolants, 0 QuantifiedInterpolants, 196 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: [L548] int length1 = __VERIFIER_nondet_int(); [L549] COND TRUE length1 < 1 [L550] length1 = 1 VAL [length1=1] [L552] EXPR, FCALL __builtin_alloca (length1 * sizeof(char)) VAL [__builtin_alloca (length1 * sizeof(char))={2:0}, length1=1] [L552] char* nondetString1 = (char*) __builtin_alloca (length1 * sizeof(char)); VAL [__builtin_alloca (length1 * sizeof(char))={2:0}, length1=1, nondetString1={2:0}] [L553] FCALL nondetString1[length1-1] = '\0' VAL [__builtin_alloca (length1 * sizeof(char))={2:0}, length1=1, nondetString1={2:0}] [L554] CALL, EXPR cstrlen(nondetString1) VAL [s={2:0}] [L542] const char *p = s; VAL [p={2:0}, s={2:0}, s={2:0}] [L543] EXPR, FCALL \read(*p) VAL [\read(*p)=0, p={2:0}, s={2:0}, s={2:0}] [L543] COND FALSE !(*p != '\0') [L545] RET return (int)(p - s); VAL [\result=0, p={2:0}, s={2:0}, s={2:0}] [L554] EXPR cstrlen(nondetString1) VAL [__builtin_alloca (length1 * sizeof(char))={2:0}, cstrlen(nondetString1)=0, length1=1, nondetString1={2:0}] [L554] return cstrlen(nondetString1); - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0EnsuresViolation CFG has 4 procedures, 29 locations, 4 error locations. UNSAFE Result, 0.1s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 29 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=29occurred 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, 46 NumberOfCodeBlocks, 46 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 441 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: 547]: 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, 29 locations, 4 error locations. SAFE Result, 0.2s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 47 SDtfs, 8 SDslu, 5 SDs, 0 SdLazy, 24 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=29occurred 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, 42 NumberOfCodeBlocks, 42 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 40 ConstructedInterpolants, 0 QuantifiedInterpolants, 2104 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 RESULT: Ultimate proved your program to be incorrect! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrlen-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_precise.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-21_05-33-06-105.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrlen-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_precise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-21_05-33-06-105.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrlen-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_precise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-21_05-33-06-105.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrlen-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_precise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-21_05-33-06-105.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrlen-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_precise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-3-2018-01-21_05-33-06-105.csv Received shutdown request...