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_preciseopt.epf -i ../../../trunk/examples/svcomp/array-memsafety/cstrncat-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 08:15:02,529 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 08:15:02,531 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 08:15:02,547 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 08:15:02,547 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 08:15:02,548 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 08:15:02,549 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 08:15:02,551 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 08:15:02,553 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 08:15:02,553 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 08:15:02,554 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 08:15:02,555 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 08:15:02,555 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 08:15:02,557 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 08:15:02,558 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 08:15:02,560 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 08:15:02,562 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 08:15:02,564 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 08:15:02,566 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 08:15:02,567 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 08:15:02,569 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 08:15:02,574 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 08:15:02,575 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 08:15:02,575 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_preciseopt.epf [2018-01-21 08:15:02,584 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 08:15:02,584 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 08:15:02,585 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 08:15:02,585 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 08:15:02,585 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 08:15:02,586 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 08:15:02,586 INFO L133 SettingsManager]: * Flatten before fatten=true [2018-01-21 08:15:02,586 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 08:15:02,586 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 08:15:02,586 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 08:15:02,586 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 08:15:02,587 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 08:15:02,587 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 08:15:02,587 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 08:15:02,587 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 08:15:02,587 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 08:15:02,587 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 08:15:02,587 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 08:15:02,587 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 08:15:02,588 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 08:15:02,588 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 08:15:02,588 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 08:15:02,588 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 08:15:02,588 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 08:15:02,589 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 08:15:02,589 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 08:15:02,589 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 08:15:02,589 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 08:15:02,589 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 08:15:02,589 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 08:15:02,589 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 08:15:02,590 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 08:15:02,590 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 08:15:02,590 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 08:15:02,590 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 08:15:02,590 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 08:15:02,590 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 08:15:02,590 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 08:15:02,591 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 08:15:02,591 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 08:15:02,624 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 08:15:02,635 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 08:15:02,638 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 08:15:02,640 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 08:15:02,640 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 08:15:02,641 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/cstrncat-alloca_true-valid-memsafety_true-termination.i [2018-01-21 08:15:02,800 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 08:15:02,805 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 08:15:02,805 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 08:15:02,805 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 08:15:02,811 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 08:15:02,812 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 08:15:02" (1/1) ... [2018-01-21 08:15:02,815 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22535488 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:15:02, skipping insertion in model container [2018-01-21 08:15:02,815 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 08:15:02" (1/1) ... [2018-01-21 08:15:02,829 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 08:15:02,867 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 08:15:02,992 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 08:15:03,010 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 08:15:03,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:15:03 WrapperNode [2018-01-21 08:15:03,017 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 08:15:03,018 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 08:15:03,018 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 08:15:03,018 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 08:15:03,035 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:15:03" (1/1) ... [2018-01-21 08:15:03,035 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:15:03" (1/1) ... [2018-01-21 08:15:03,047 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:15:03" (1/1) ... [2018-01-21 08:15:03,047 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:15:03" (1/1) ... [2018-01-21 08:15:03,052 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:15:03" (1/1) ... [2018-01-21 08:15:03,055 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:15:03" (1/1) ... [2018-01-21 08:15:03,056 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:15:03" (1/1) ... [2018-01-21 08:15:03,058 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 08:15:03,058 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 08:15:03,058 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 08:15:03,058 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 08:15:03,059 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:15:03" (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 08:15:03,117 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 08:15:03,117 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 08:15:03,117 INFO L136 BoogieDeclarations]: Found implementation of procedure cstrncat [2018-01-21 08:15:03,118 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 08:15:03,118 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 08:15:03,118 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 08:15:03,118 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 08:15:03,118 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 08:15:03,118 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 08:15:03,118 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 08:15:03,118 INFO L128 BoogieDeclarations]: Found specification of procedure cstrncat [2018-01-21 08:15:03,118 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 08:15:03,119 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 08:15:03,119 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 08:15:03,327 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 08:15:03,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 08:15:03 BoogieIcfgContainer [2018-01-21 08:15:03,327 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 08:15:03,328 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 08:15:03,329 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 08:15:03,331 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 08:15:03,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 08:15:02" (1/3) ... [2018-01-21 08:15:03,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f569557 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 08:15:03, skipping insertion in model container [2018-01-21 08:15:03,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:15:03" (2/3) ... [2018-01-21 08:15:03,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f569557 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 08:15:03, skipping insertion in model container [2018-01-21 08:15:03,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 08:15:03" (3/3) ... [2018-01-21 08:15:03,335 INFO L105 eAbstractionObserver]: Analyzing ICFG cstrncat-alloca_true-valid-memsafety_true-termination.i [2018-01-21 08:15:03,344 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 08:15:03,351 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-21 08:15:03,398 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:15:03,398 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:15:03,398 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:15:03,398 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:15:03,398 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:15:03,398 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:15:03,398 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:15:03,399 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 08:15:03,399 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:15:03,418 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2018-01-21 08:15:03,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 08:15:03,424 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:15:03,425 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 08:15:03,425 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 08:15:03,429 INFO L82 PathProgramCache]: Analyzing trace with hash 118205, now seen corresponding path program 1 times [2018-01-21 08:15:03,431 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:15:03,472 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:15:03,473 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:15:03,473 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:15:03,473 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:15:03,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:15:03,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:15:03,525 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 08:15:03,530 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:15:03,535 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:15:03,536 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:15:03,536 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:15:03,536 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:15:03,536 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:15:03,536 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:15:03,536 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:15:03,536 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 08:15:03,536 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:15:03,538 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2018-01-21 08:15:03,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-21 08:15:03,538 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:15:03,538 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 08:15:03,538 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 08:15:03,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1650403995, now seen corresponding path program 1 times [2018-01-21 08:15:03,539 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:15:03,540 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:15:03,540 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:15:03,540 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:15:03,540 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:15:03,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:15:03,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:15:03,583 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 08:15:03,585 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:15:03,586 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:15:03,586 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:15:03,592 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:15:03,592 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:15:03,593 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:15:03,593 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:15:03,593 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:15:03,593 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:15:03,593 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:15:03,593 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 08:15:03,594 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:15:03,596 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2018-01-21 08:15:03,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-01-21 08:15:03,597 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:15:03,597 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 08:15:03,597 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 08:15:03,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1409537045, now seen corresponding path program 1 times [2018-01-21 08:15:03,598 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:15:03,599 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:15:03,599 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:15:03,600 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:15:03,600 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:15:03,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:15:03,622 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:15:03,682 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 08:15:03,683 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:15:03,683 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 08:15:03,683 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:15:03,761 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-21 08:15:03,773 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-21 08:15:03,774 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 08:15:03,776 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2018-01-21 08:15:03,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:15:03,848 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2018-01-21 08:15:03,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-21 08:15:03,850 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-01-21 08:15:03,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:15:03,859 INFO L225 Difference]: With dead ends: 72 [2018-01-21 08:15:03,859 INFO L226 Difference]: Without dead ends: 41 [2018-01-21 08:15:03,862 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 08:15:03,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-01-21 08:15:03,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-01-21 08:15:03,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-01-21 08:15:03,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2018-01-21 08:15:03,897 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 11 [2018-01-21 08:15:03,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:15:03,897 INFO L432 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2018-01-21 08:15:03,897 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-21 08:15:03,898 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2018-01-21 08:15:03,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-01-21 08:15:03,899 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:15:03,899 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, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 08:15:03,899 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-21 08:15:03,900 INFO L82 PathProgramCache]: Analyzing trace with hash 2049811947, now seen corresponding path program 1 times [2018-01-21 08:15:03,900 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:15:03,901 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:15:03,901 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:15:03,901 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:15:03,902 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:15:03,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:15:03,917 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:15:03,992 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 08:15:03,993 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:15:03,993 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 08:15:03,993 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:15:03,995 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 08:15:03,995 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 08:15:03,996 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 08:15:03,996 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 5 states. [2018-01-21 08:15:04,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:15:04,067 INFO L93 Difference]: Finished difference Result 75 states and 86 transitions. [2018-01-21 08:15:04,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 08:15:04,068 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2018-01-21 08:15:04,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:15:04,068 INFO L225 Difference]: With dead ends: 75 [2018-01-21 08:15:04,069 INFO L226 Difference]: Without dead ends: 41 [2018-01-21 08:15:04,069 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-21 08:15:04,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-01-21 08:15:04,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-01-21 08:15:04,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-01-21 08:15:04,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2018-01-21 08:15:04,076 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 36 [2018-01-21 08:15:04,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:15:04,076 INFO L432 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2018-01-21 08:15:04,076 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 08:15:04,076 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2018-01-21 08:15:04,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-01-21 08:15:04,077 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:15:04,078 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, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 08:15:04,078 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-21 08:15:04,078 INFO L82 PathProgramCache]: Analyzing trace with hash 2072444201, now seen corresponding path program 1 times [2018-01-21 08:15:04,078 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:15:04,079 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:15:04,080 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:15:04,080 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:15:04,080 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:15:04,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:15:04,106 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:15:04,187 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 08:15:04,187 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:15:04,188 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-21 08:15:04,188 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:15:04,188 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-21 08:15:04,188 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-21 08:15:04,189 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-01-21 08:15:04,189 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 6 states. [2018-01-21 08:15:04,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:15:04,266 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2018-01-21 08:15:04,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-21 08:15:04,266 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2018-01-21 08:15:04,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:15:04,270 INFO L225 Difference]: With dead ends: 81 [2018-01-21 08:15:04,271 INFO L226 Difference]: Without dead ends: 54 [2018-01-21 08:15:04,271 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-01-21 08:15:04,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-01-21 08:15:04,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 44. [2018-01-21 08:15:04,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-01-21 08:15:04,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2018-01-21 08:15:04,279 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 36 [2018-01-21 08:15:04,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:15:04,279 INFO L432 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2018-01-21 08:15:04,279 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-21 08:15:04,279 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2018-01-21 08:15:04,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-01-21 08:15:04,281 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:15:04,281 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 08:15:04,281 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr0EnsuresViolation]=== [2018-01-21 08:15:04,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1987871450, now seen corresponding path program 1 times [2018-01-21 08:15:04,281 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:15:04,282 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:15:04,282 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:15:04,282 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:15:04,282 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:15:04,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:15:04,310 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:15:04,560 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 08:15:04,561 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:15:04,561 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-21 08:15:04,561 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:15:04,562 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-21 08:15:04,562 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-21 08:15:04,562 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-01-21 08:15:04,562 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 7 states. [2018-01-21 08:15:04,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:15:04,766 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2018-01-21 08:15:04,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-21 08:15:04,766 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 39 [2018-01-21 08:15:04,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:15:04,767 INFO L225 Difference]: With dead ends: 44 [2018-01-21 08:15:04,767 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 08:15:04,768 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-01-21 08:15:04,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 08:15:04,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 08:15:04,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 08:15:04,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 08:15:04,768 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 39 [2018-01-21 08:15:04,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:15:04,769 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 08:15:04,769 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-21 08:15:04,769 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 08:15:04,769 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 08:15:04,772 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:15:04,772 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:15:04,772 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:15:04,772 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:15:04,772 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:15:04,773 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:15:04,773 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:15:04,773 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == cstrncatErr0EnsuresViolation======== [2018-01-21 08:15:04,773 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:15:04,774 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2018-01-21 08:15:04,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-01-21 08:15:04,776 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:15:04,776 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 08:15:04,776 INFO L371 AbstractCegarLoop]: === Iteration 1 === [cstrncatErr0EnsuresViolation]=== [2018-01-21 08:15:04,776 INFO L82 PathProgramCache]: Analyzing trace with hash -821118556, now seen corresponding path program 1 times [2018-01-21 08:15:04,776 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:15:04,777 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:15:04,778 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:15:04,778 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:15:04,778 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:15:04,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:15:04,786 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:15:04,819 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 08:15:04,820 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:15:04,820 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 08:15:04,820 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:15:04,821 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 08:15:04,821 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 08:15:04,821 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 08:15:04,821 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 5 states. [2018-01-21 08:15:04,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:15:04,889 INFO L93 Difference]: Finished difference Result 88 states and 107 transitions. [2018-01-21 08:15:04,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 08:15:04,889 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2018-01-21 08:15:04,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:15:04,890 INFO L225 Difference]: With dead ends: 88 [2018-01-21 08:15:04,890 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 08:15:04,891 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-21 08:15:04,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 08:15:04,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 08:15:04,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 08:15:04,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 08:15:04,892 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2018-01-21 08:15:04,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:15:04,892 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 08:15:04,892 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 08:15:04,892 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 08:15:04,892 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 08:15:04,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.01 08:15:04 BoogieIcfgContainer [2018-01-21 08:15:04,895 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-21 08:15:04,896 INFO L168 Benchmark]: Toolchain (without parser) took 2095.75 ms. Allocated memory was 308.8 MB in the beginning and 470.8 MB in the end (delta: 162.0 MB). Free memory was 267.0 MB in the beginning and 330.9 MB in the end (delta: -64.0 MB). Peak memory consumption was 98.0 MB. Max. memory is 5.3 GB. [2018-01-21 08:15:04,898 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 308.8 MB. Free memory is still 272.9 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-21 08:15:04,898 INFO L168 Benchmark]: CACSL2BoogieTranslator took 212.42 ms. Allocated memory is still 308.8 MB. Free memory was 266.0 MB in the beginning and 255.8 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 5.3 GB. [2018-01-21 08:15:04,899 INFO L168 Benchmark]: Boogie Preprocessor took 39.76 ms. Allocated memory is still 308.8 MB. Free memory was 255.8 MB in the beginning and 253.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-21 08:15:04,899 INFO L168 Benchmark]: RCFGBuilder took 269.42 ms. Allocated memory is still 308.8 MB. Free memory was 253.9 MB in the beginning and 235.8 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 5.3 GB. [2018-01-21 08:15:04,899 INFO L168 Benchmark]: TraceAbstraction took 1567.12 ms. Allocated memory was 308.8 MB in the beginning and 470.8 MB in the end (delta: 162.0 MB). Free memory was 235.8 MB in the beginning and 330.9 MB in the end (delta: -95.1 MB). Peak memory consumption was 66.9 MB. Max. memory is 5.3 GB. [2018-01-21 08:15:04,901 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 308.8 MB. Free memory is still 272.9 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 212.42 ms. Allocated memory is still 308.8 MB. Free memory was 266.0 MB in the beginning and 255.8 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 39.76 ms. Allocated memory is still 308.8 MB. Free memory was 255.8 MB in the beginning and 253.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 269.42 ms. Allocated memory is still 308.8 MB. Free memory was 253.9 MB in the beginning and 235.8 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 5.3 GB. * TraceAbstraction took 1567.12 ms. Allocated memory was 308.8 MB in the beginning and 470.8 MB in the end (delta: 162.0 MB). Free memory was 235.8 MB in the beginning and 330.9 MB in the end (delta: -95.1 MB). Peak memory consumption was 66.9 MB. 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) * 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, 47 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=47occurred 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: [L554] int length1 = __VERIFIER_nondet_int(); [L555] int length2 = __VERIFIER_nondet_int(); [L556] int n = __VERIFIER_nondet_int(); [L557] COND TRUE length1 < 1 [L558] length1 = 1 VAL [length1=1, length2=0, n=0] [L560] COND TRUE length2 < 1 [L561] length2 = 1 VAL [length1=1, length2=1, n=0] [L563] COND TRUE n < 1 [L564] n = 1 VAL [length1=1, length2=1, n=1] [L566] COND TRUE length1 < n || length1 - n < length2 [L566] return 0; - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0EnsuresViolation CFG has 4 procedures, 47 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=47occurred 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, 13 NumberOfCodeBlocks, 13 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: 553]: 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, 47 locations, 4 error locations. SAFE Result, 1.1s OverallTime, 4 OverallIterations, 1 TraceHistogramMax, 0.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 180 SDtfs, 120 SDslu, 254 SDs, 0 SdLazy, 183 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred 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, 4 MinimizatonAttempts, 10 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 122 NumberOfCodeBlocks, 122 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 118 ConstructedInterpolants, 0 QuantifiedInterpolants, 12432 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 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: cstrncatErr0EnsuresViolation CFG has 4 procedures, 47 locations, 4 error locations. SAFE Result, 0.1s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 52 SDtfs, 15 SDslu, 128 SDs, 0 SdLazy, 31 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred 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, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 23 ConstructedInterpolants, 0 QuantifiedInterpolants, 759 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 RESULT: Ultimate proved your program to be incorrect! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrncat-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-21_08-15-04-911.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrncat-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-21_08-15-04-911.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrncat-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-21_08-15-04-911.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrncat-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-21_08-15-04-911.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrncat-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-3-2018-01-21_08-15-04-911.csv Received shutdown request...