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_Camel+AI_EQ.epf -i ../../../trunk/examples/svcomp/array-memsafety/cstrncpy-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-47db877 [2018-01-23 14:21:27,647 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-23 14:21:27,649 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-23 14:21:27,662 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-23 14:21:27,662 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-23 14:21:27,663 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-23 14:21:27,663 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-23 14:21:27,665 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-23 14:21:27,666 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-23 14:21:27,667 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-23 14:21:27,668 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-23 14:21:27,668 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-23 14:21:27,668 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-23 14:21:27,669 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-23 14:21:27,670 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-23 14:21:27,672 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-23 14:21:27,675 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-23 14:21:27,677 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-23 14:21:27,678 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-23 14:21:27,679 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-23 14:21:27,682 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-23 14:21:27,687 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-23 14:21:27,687 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-23 14:21:27,688 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Camel+AI_EQ.epf [2018-01-23 14:21:27,698 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-23 14:21:27,698 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-23 14:21:27,699 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-23 14:21:27,699 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-23 14:21:27,700 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-23 14:21:27,700 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-23 14:21:27,700 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-23 14:21:27,700 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-23 14:21:27,701 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-23 14:21:27,701 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-23 14:21:27,701 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-23 14:21:27,701 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-23 14:21:27,701 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-23 14:21:27,702 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-23 14:21:27,702 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-23 14:21:27,702 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-23 14:21:27,702 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-23 14:21:27,702 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-23 14:21:27,703 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-23 14:21:27,703 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-23 14:21:27,703 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-23 14:21:27,703 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-23 14:21:27,703 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-23 14:21:27,703 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-23 14:21:27,704 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-23 14:21:27,704 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-23 14:21:27,704 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-23 14:21:27,704 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-23 14:21:27,704 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-23 14:21:27,705 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-23 14:21:27,705 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-23 14:21:27,705 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-23 14:21:27,705 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-23 14:21:27,705 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-23 14:21:27,706 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-23 14:21:27,706 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-23 14:21:27,707 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-23 14:21:27,741 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-23 14:21:27,756 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-23 14:21:27,760 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-23 14:21:27,762 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-23 14:21:27,762 INFO L276 PluginConnector]: CDTParser initialized [2018-01-23 14:21:27,763 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/cstrncpy-alloca_true-valid-memsafety_true-termination.i [2018-01-23 14:21:27,954 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-23 14:21:27,959 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-23 14:21:27,959 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-23 14:21:27,960 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-23 14:21:27,965 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-23 14:21:27,966 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 02:21:27" (1/1) ... [2018-01-23 14:21:27,969 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1266e3d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:21:27, skipping insertion in model container [2018-01-23 14:21:27,969 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 02:21:27" (1/1) ... [2018-01-23 14:21:27,982 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-23 14:21:28,020 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-23 14:21:28,137 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-23 14:21:28,159 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-23 14:21:28,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:21:28 WrapperNode [2018-01-23 14:21:28,166 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-23 14:21:28,167 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-23 14:21:28,167 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-23 14:21:28,168 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-23 14:21:28,185 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:21:28" (1/1) ... [2018-01-23 14:21:28,185 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:21:28" (1/1) ... [2018-01-23 14:21:28,194 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:21:28" (1/1) ... [2018-01-23 14:21:28,194 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:21:28" (1/1) ... [2018-01-23 14:21:28,199 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:21:28" (1/1) ... [2018-01-23 14:21:28,203 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:21:28" (1/1) ... [2018-01-23 14:21:28,204 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:21:28" (1/1) ... [2018-01-23 14:21:28,206 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-23 14:21:28,206 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-23 14:21:28,207 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-23 14:21:28,207 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-23 14:21:28,208 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:21:28" (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 [2018-01-23 14:21:28,254 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-23 14:21:28,255 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-23 14:21:28,255 INFO L136 BoogieDeclarations]: Found implementation of procedure cstrncpy [2018-01-23 14:21:28,255 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-23 14:21:28,255 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-23 14:21:28,255 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-23 14:21:28,255 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-23 14:21:28,255 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-23 14:21:28,255 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-23 14:21:28,255 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-23 14:21:28,256 INFO L128 BoogieDeclarations]: Found specification of procedure cstrncpy [2018-01-23 14:21:28,256 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-23 14:21:28,256 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-23 14:21:28,256 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-23 14:21:28,441 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-23 14:21:28,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 02:21:28 BoogieIcfgContainer [2018-01-23 14:21:28,441 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-23 14:21:28,442 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-23 14:21:28,442 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-23 14:21:28,444 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-23 14:21:28,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.01 02:21:27" (1/3) ... [2018-01-23 14:21:28,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10caa162 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.01 02:21:28, skipping insertion in model container [2018-01-23 14:21:28,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:21:28" (2/3) ... [2018-01-23 14:21:28,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10caa162 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.01 02:21:28, skipping insertion in model container [2018-01-23 14:21:28,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 02:21:28" (3/3) ... [2018-01-23 14:21:28,447 INFO L105 eAbstractionObserver]: Analyzing ICFG cstrncpy-alloca_true-valid-memsafety_true-termination.i [2018-01-23 14:21:28,453 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-23 14:21:28,460 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-23 14:21:28,500 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:21:28,500 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:21:28,500 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:21:28,500 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:21:28,500 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:21:28,500 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:21:28,500 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:21:28,500 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == cstrncpyErr0EnsuresViolation======== [2018-01-23 14:21:28,501 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:21:28,522 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2018-01-23 14:21:28,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-23 14:21:28,529 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:21:28,531 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:21:28,531 INFO L371 AbstractCegarLoop]: === Iteration 1 === [cstrncpyErr0EnsuresViolation]=== [2018-01-23 14:21:28,537 INFO L82 PathProgramCache]: Analyzing trace with hash -863788705, now seen corresponding path program 1 times [2018-01-23 14:21:28,539 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:21:28,540 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:21:28,585 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:21:28,585 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:21:28,585 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:21:28,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:21:28,645 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:21:28,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:21:28,689 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:21:28,689 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-23 14:21:28,691 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-23 14:21:28,702 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-23 14:21:28,703 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-23 14:21:28,705 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2018-01-23 14:21:28,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:21:28,724 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2018-01-23 14:21:28,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-23 14:21:28,725 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2018-01-23 14:21:28,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:21:28,732 INFO L225 Difference]: With dead ends: 55 [2018-01-23 14:21:28,732 INFO L226 Difference]: Without dead ends: 0 [2018-01-23 14:21:28,735 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 [2018-01-23 14:21:28,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-23 14:21:28,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-23 14:21:28,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-23 14:21:28,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-23 14:21:28,843 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2018-01-23 14:21:28,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:21:28,843 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-23 14:21:28,844 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-23 14:21:28,844 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-23 14:21:28,844 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-23 14:21:28,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-01-23 14:21:28,874 INFO L401 ceAbstractionStarter]: For program point L551'(lines 551 552) no Hoare annotation was computed. [2018-01-23 14:21:28,874 INFO L401 ceAbstractionStarter]: For program point L546(lines 546 555) no Hoare annotation was computed. [2018-01-23 14:21:28,875 INFO L404 ceAbstractionStarter]: At program point cstrncpyENTRY(lines 540 557) the Hoare annotation is: true [2018-01-23 14:21:28,875 INFO L401 ceAbstractionStarter]: For program point L548(line 548) no Hoare annotation was computed. [2018-01-23 14:21:28,875 INFO L401 ceAbstractionStarter]: For program point cstrncpyFINAL(lines 540 557) no Hoare annotation was computed. [2018-01-23 14:21:28,875 INFO L401 ceAbstractionStarter]: For program point L548'(line 548) no Hoare annotation was computed. [2018-01-23 14:21:28,875 INFO L401 ceAbstractionStarter]: For program point cstrncpyErr0EnsuresViolation(lines 540 557) no Hoare annotation was computed. [2018-01-23 14:21:28,875 INFO L401 ceAbstractionStarter]: For program point L552(line 552) no Hoare annotation was computed. [2018-01-23 14:21:28,875 INFO L401 ceAbstractionStarter]: For program point L551(lines 551 552) no Hoare annotation was computed. [2018-01-23 14:21:28,876 INFO L401 ceAbstractionStarter]: For program point L552'(line 552) no Hoare annotation was computed. [2018-01-23 14:21:28,876 INFO L401 ceAbstractionStarter]: For program point cstrncpyEXIT(lines 540 557) no Hoare annotation was computed. [2018-01-23 14:21:28,876 INFO L404 ceAbstractionStarter]: At program point L551'''(lines 551 552) the Hoare annotation is: true [2018-01-23 14:21:28,876 INFO L404 ceAbstractionStarter]: At program point L546''(lines 546 555) the Hoare annotation is: true [2018-01-23 14:21:28,876 INFO L401 ceAbstractionStarter]: For program point L546'''(lines 546 555) no Hoare annotation was computed. [2018-01-23 14:21:28,876 INFO L401 ceAbstractionStarter]: For program point L548''(line 548) no Hoare annotation was computed. [2018-01-23 14:21:28,877 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initErr0EnsuresViolation(lines 1 572) no Hoare annotation was computed. [2018-01-23 14:21:28,877 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(lines 1 572) no Hoare annotation was computed. [2018-01-23 14:21:28,877 INFO L404 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(lines 1 572) the Hoare annotation is: true [2018-01-23 14:21:28,877 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(lines 1 572) no Hoare annotation was computed. [2018-01-23 14:21:28,877 INFO L404 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(lines 1 572) the Hoare annotation is: true [2018-01-23 14:21:28,877 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(lines 1 572) no Hoare annotation was computed. [2018-01-23 14:21:28,878 INFO L404 ceAbstractionStarter]: At program point L1(lines 1 572) the Hoare annotation is: true [2018-01-23 14:21:28,878 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startErr0EnsuresViolation(lines 1 572) no Hoare annotation was computed. [2018-01-23 14:21:28,878 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(lines 1 572) no Hoare annotation was computed. [2018-01-23 14:21:28,878 INFO L401 ceAbstractionStarter]: For program point L561(lines 561 563) no Hoare annotation was computed. [2018-01-23 14:21:28,878 INFO L401 ceAbstractionStarter]: For program point L568(line 568) no Hoare annotation was computed. [2018-01-23 14:21:28,878 INFO L401 ceAbstractionStarter]: For program point L567(line 567) no Hoare annotation was computed. [2018-01-23 14:21:28,879 INFO L401 ceAbstractionStarter]: For program point L569(line 569) no Hoare annotation was computed. [2018-01-23 14:21:28,879 INFO L401 ceAbstractionStarter]: For program point L568'(line 568) no Hoare annotation was computed. [2018-01-23 14:21:28,879 INFO L401 ceAbstractionStarter]: For program point mainErr0EnsuresViolation(lines 558 572) no Hoare annotation was computed. [2018-01-23 14:21:28,879 INFO L401 ceAbstractionStarter]: For program point L570(line 570) no Hoare annotation was computed. [2018-01-23 14:21:28,879 INFO L401 ceAbstractionStarter]: For program point L568'''(line 568) no Hoare annotation was computed. [2018-01-23 14:21:28,879 INFO L401 ceAbstractionStarter]: For program point L564'(lines 564 566) no Hoare annotation was computed. [2018-01-23 14:21:28,879 INFO L401 ceAbstractionStarter]: For program point mainFINAL(lines 558 572) no Hoare annotation was computed. [2018-01-23 14:21:28,880 INFO L401 ceAbstractionStarter]: For program point mainEXIT(lines 558 572) no Hoare annotation was computed. [2018-01-23 14:21:28,880 INFO L404 ceAbstractionStarter]: At program point mainENTRY(lines 558 572) the Hoare annotation is: true [2018-01-23 14:21:28,880 INFO L401 ceAbstractionStarter]: For program point L561''(lines 561 563) no Hoare annotation was computed. [2018-01-23 14:21:28,880 INFO L401 ceAbstractionStarter]: For program point L567'(line 567) no Hoare annotation was computed. [2018-01-23 14:21:28,880 INFO L404 ceAbstractionStarter]: At program point L569'(line 569) the Hoare annotation is: true [2018-01-23 14:21:28,880 INFO L401 ceAbstractionStarter]: For program point L567''(line 567) no Hoare annotation was computed. [2018-01-23 14:21:28,880 INFO L401 ceAbstractionStarter]: For program point L568''(line 568) no Hoare annotation was computed. [2018-01-23 14:21:28,884 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:21:28,884 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:21:28,885 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:21:28,885 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:21:28,885 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:21:28,885 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:21:28,885 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:21:28,885 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-23 14:21:28,886 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:21:28,887 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2018-01-23 14:21:28,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-23 14:21:28,888 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:21:28,888 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-23 14:21:28,888 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-23 14:21:28,889 INFO L82 PathProgramCache]: Analyzing trace with hash 101226, now seen corresponding path program 1 times [2018-01-23 14:21:28,889 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:21:28,889 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:21:28,890 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:21:28,890 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:21:28,891 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:21:28,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:21:28,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:21:28,921 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-23 14:21:28,925 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 14:21:28,929 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:21:28,929 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:21:28,930 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:21:28,930 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:21:28,930 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:21:28,930 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:21:28,930 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:21:28,930 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-23 14:21:28,930 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:21:28,931 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2018-01-23 14:21:28,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-23 14:21:28,932 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:21:28,932 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:21:28,933 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:21:28,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1088900075, now seen corresponding path program 1 times [2018-01-23 14:21:28,933 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:21:28,933 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:21:28,934 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:21:28,934 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:21:28,934 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:21:28,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:21:28,953 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:21:28,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:21:28,976 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:21:28,976 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-23 14:21:28,977 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-23 14:21:28,977 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-23 14:21:28,977 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-23 14:21:28,978 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2018-01-23 14:21:28,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:21:28,982 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2018-01-23 14:21:28,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-23 14:21:28,982 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 27 [2018-01-23 14:21:28,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:21:28,986 INFO L225 Difference]: With dead ends: 55 [2018-01-23 14:21:28,986 INFO L226 Difference]: Without dead ends: 37 [2018-01-23 14:21:28,987 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 [2018-01-23 14:21:28,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-01-23 14:21:28,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-01-23 14:21:28,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-01-23 14:21:28,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2018-01-23 14:21:28,997 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 27 [2018-01-23 14:21:28,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:21:28,997 INFO L432 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2018-01-23 14:21:28,997 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-23 14:21:28,997 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2018-01-23 14:21:28,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-23 14:21:28,998 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:21:28,998 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] [2018-01-23 14:21:28,998 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:21:28,998 INFO L82 PathProgramCache]: Analyzing trace with hash -145997304, now seen corresponding path program 1 times [2018-01-23 14:21:28,999 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:21:28,999 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:21:28,999 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:21:29,000 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:21:29,000 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:21:29,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:21:29,020 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:21:29,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:21:29,106 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:21:29,106 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-23 14:21:29,108 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-23 14:21:29,108 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-23 14:21:29,109 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-23 14:21:29,109 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 5 states. [2018-01-23 14:21:29,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:21:29,175 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2018-01-23 14:21:29,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-23 14:21:29,175 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2018-01-23 14:21:29,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:21:29,177 INFO L225 Difference]: With dead ends: 51 [2018-01-23 14:21:29,177 INFO L226 Difference]: Without dead ends: 39 [2018-01-23 14:21:29,178 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-01-23 14:21:29,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-01-23 14:21:29,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-01-23 14:21:29,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-01-23 14:21:29,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2018-01-23 14:21:29,184 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 28 [2018-01-23 14:21:29,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:21:29,185 INFO L432 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2018-01-23 14:21:29,185 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-23 14:21:29,185 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2018-01-23 14:21:29,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-01-23 14:21:29,187 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:21:29,187 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:21:29,187 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:21:29,187 INFO L82 PathProgramCache]: Analyzing trace with hash 197922362, now seen corresponding path program 1 times [2018-01-23 14:21:29,187 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:21:29,187 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:21:29,188 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:21:29,189 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:21:29,189 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:21:29,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:21:29,212 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:21:29,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:21:29,510 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:21:29,510 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:21:29,521 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:21:29,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:21:29,561 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:21:29,616 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 11 [2018-01-23 14:21:29,619 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 10 [2018-01-23 14:21:29,620 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-23 14:21:29,622 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-23 14:21:29,629 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-01-23 14:21:29,629 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2018-01-23 14:21:29,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:21:29,703 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:21:29,704 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 11 [2018-01-23 14:21:29,704 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-01-23 14:21:29,704 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-01-23 14:21:29,705 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2018-01-23 14:21:29,705 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 11 states. [2018-01-23 14:21:29,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:21:29,961 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2018-01-23 14:21:29,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-01-23 14:21:29,961 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2018-01-23 14:21:29,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:21:29,964 INFO L225 Difference]: With dead ends: 73 [2018-01-23 14:21:29,964 INFO L226 Difference]: Without dead ends: 64 [2018-01-23 14:21:29,965 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2018-01-23 14:21:29,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-01-23 14:21:29,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2018-01-23 14:21:29,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-01-23 14:21:29,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2018-01-23 14:21:29,976 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 33 [2018-01-23 14:21:29,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:21:29,976 INFO L432 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2018-01-23 14:21:29,976 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-01-23 14:21:29,976 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2018-01-23 14:21:29,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-01-23 14:21:29,978 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:21:29,978 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:21:29,978 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:21:29,978 INFO L82 PathProgramCache]: Analyzing trace with hash 2121150396, now seen corresponding path program 1 times [2018-01-23 14:21:29,978 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:21:29,978 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:21:29,979 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:21:29,979 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:21:29,979 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:21:29,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:21:30,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:21:30,027 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-23 14:21:30,035 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 14:21:30,040 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 14:21:30,042 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 14:21:30,042 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 14:21:30,055 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:21:30,055 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:21:30,055 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:21:30,055 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:21:30,055 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:21:30,055 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:21:30,055 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:21:30,055 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-23 14:21:30,056 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:21:30,056 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2018-01-23 14:21:30,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-23 14:21:30,057 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:21:30,057 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:21:30,058 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-23 14:21:30,058 INFO L82 PathProgramCache]: Analyzing trace with hash -23479436, now seen corresponding path program 1 times [2018-01-23 14:21:30,058 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:21:30,058 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:21:30,059 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:21:30,059 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:21:30,059 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:21:30,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:21:30,069 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:21:30,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:21:30,083 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:21:30,084 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-23 14:21:30,084 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-23 14:21:30,084 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-23 14:21:30,084 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-23 14:21:30,085 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2018-01-23 14:21:30,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:21:30,088 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2018-01-23 14:21:30,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-23 14:21:30,089 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 25 [2018-01-23 14:21:30,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:21:30,090 INFO L225 Difference]: With dead ends: 55 [2018-01-23 14:21:30,090 INFO L226 Difference]: Without dead ends: 35 [2018-01-23 14:21:30,090 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 [2018-01-23 14:21:30,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-01-23 14:21:30,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-01-23 14:21:30,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-01-23 14:21:30,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2018-01-23 14:21:30,095 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 25 [2018-01-23 14:21:30,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:21:30,095 INFO L432 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2018-01-23 14:21:30,095 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-23 14:21:30,095 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2018-01-23 14:21:30,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-23 14:21:30,096 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:21:30,096 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] [2018-01-23 14:21:30,096 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-23 14:21:30,096 INFO L82 PathProgramCache]: Analyzing trace with hash -902944217, now seen corresponding path program 1 times [2018-01-23 14:21:30,096 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:21:30,097 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:21:30,097 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:21:30,097 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:21:30,097 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:21:30,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:21:30,109 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:21:30,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:21:30,168 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:21:30,168 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-23 14:21:30,168 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-23 14:21:30,168 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-23 14:21:30,169 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-23 14:21:30,169 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 5 states. [2018-01-23 14:21:30,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:21:30,202 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2018-01-23 14:21:30,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-23 14:21:30,203 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2018-01-23 14:21:30,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:21:30,203 INFO L225 Difference]: With dead ends: 47 [2018-01-23 14:21:30,203 INFO L226 Difference]: Without dead ends: 37 [2018-01-23 14:21:30,204 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-01-23 14:21:30,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-01-23 14:21:30,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-01-23 14:21:30,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-01-23 14:21:30,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2018-01-23 14:21:30,207 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 26 [2018-01-23 14:21:30,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:21:30,208 INFO L432 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2018-01-23 14:21:30,208 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-23 14:21:30,208 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2018-01-23 14:21:30,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-01-23 14:21:30,208 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:21:30,209 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:21:30,209 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-23 14:21:30,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1010260697, now seen corresponding path program 1 times [2018-01-23 14:21:30,209 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:21:30,209 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:21:30,210 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:21:30,210 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:21:30,210 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:21:30,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:21:30,226 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:21:30,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-23 14:21:30,537 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:21:30,537 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-01-23 14:21:30,537 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-23 14:21:30,538 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-23 14:21:30,538 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-01-23 14:21:30,538 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 8 states. [2018-01-23 14:21:30,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:21:30,710 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2018-01-23 14:21:30,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-23 14:21:30,710 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2018-01-23 14:21:30,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:21:30,711 INFO L225 Difference]: With dead ends: 50 [2018-01-23 14:21:30,711 INFO L226 Difference]: Without dead ends: 37 [2018-01-23 14:21:30,712 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-01-23 14:21:30,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-01-23 14:21:30,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-01-23 14:21:30,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-01-23 14:21:30,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2018-01-23 14:21:30,715 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 31 [2018-01-23 14:21:30,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:21:30,716 INFO L432 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2018-01-23 14:21:30,716 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-23 14:21:30,716 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2018-01-23 14:21:30,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-01-23 14:21:30,716 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:21:30,717 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:21:30,717 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr0EnsuresViolation]=== [2018-01-23 14:21:30,717 INFO L82 PathProgramCache]: Analyzing trace with hash 876247191, now seen corresponding path program 1 times [2018-01-23 14:21:30,717 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:21:30,717 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:21:30,718 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:21:30,718 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:21:30,718 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:21:30,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:21:30,731 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:21:30,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-23 14:21:30,832 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:21:30,832 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-23 14:21:30,833 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-23 14:21:30,834 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-23 14:21:30,834 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-23 14:21:30,834 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 6 states. [2018-01-23 14:21:30,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:21:30,966 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2018-01-23 14:21:30,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-23 14:21:30,966 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2018-01-23 14:21:30,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:21:30,967 INFO L225 Difference]: With dead ends: 37 [2018-01-23 14:21:30,967 INFO L226 Difference]: Without dead ends: 0 [2018-01-23 14:21:30,967 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-01-23 14:21:30,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-23 14:21:30,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-23 14:21:30,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-23 14:21:30,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-23 14:21:30,968 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2018-01-23 14:21:30,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:21:30,968 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-23 14:21:30,968 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-23 14:21:30,968 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-23 14:21:30,968 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-23 14:21:30,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.01 02:21:30 BoogieIcfgContainer [2018-01-23 14:21:30,971 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-23 14:21:30,972 INFO L168 Benchmark]: Toolchain (without parser) took 3017.56 ms. Allocated memory was 302.5 MB in the beginning and 478.2 MB in the end (delta: 175.6 MB). Free memory was 260.8 MB in the beginning and 346.5 MB in the end (delta: -85.7 MB). Peak memory consumption was 90.0 MB. Max. memory is 5.3 GB. [2018-01-23 14:21:30,973 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 302.5 MB. Free memory is still 266.8 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-23 14:21:30,974 INFO L168 Benchmark]: CACSL2BoogieTranslator took 207.58 ms. Allocated memory is still 302.5 MB. Free memory was 259.8 MB in the beginning and 249.7 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 5.3 GB. [2018-01-23 14:21:30,974 INFO L168 Benchmark]: Boogie Preprocessor took 38.80 ms. Allocated memory is still 302.5 MB. Free memory was 249.7 MB in the beginning and 247.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 5.3 GB. [2018-01-23 14:21:30,974 INFO L168 Benchmark]: RCFGBuilder took 234.82 ms. Allocated memory is still 302.5 MB. Free memory was 247.7 MB in the beginning and 230.9 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 5.3 GB. [2018-01-23 14:21:30,975 INFO L168 Benchmark]: TraceAbstraction took 2529.61 ms. Allocated memory was 302.5 MB in the beginning and 478.2 MB in the end (delta: 175.6 MB). Free memory was 230.9 MB in the beginning and 346.5 MB in the end (delta: -115.6 MB). Peak memory consumption was 60.0 MB. Max. memory is 5.3 GB. [2018-01-23 14:21:30,977 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 302.5 MB. Free memory is still 266.8 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 207.58 ms. Allocated memory is still 302.5 MB. Free memory was 259.8 MB in the beginning and 249.7 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 38.80 ms. Allocated memory is still 302.5 MB. Free memory was 249.7 MB in the beginning and 247.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 5.3 GB. * RCFGBuilder took 234.82 ms. Allocated memory is still 302.5 MB. Free memory was 247.7 MB in the beginning and 230.9 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 5.3 GB. * TraceAbstraction took 2529.61 ms. Allocated memory was 302.5 MB in the beginning and 478.2 MB in the end (delta: 175.6 MB). Free memory was 230.9 MB in the beginning and 346.5 MB in the end (delta: -115.6 MB). Peak memory consumption was 60.0 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) - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 540]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data for error location: cstrncpyErr0EnsuresViolation CFG has 4 procedures, 41 locations, 4 error locations. SAFE Result, 0.3s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 44 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=41occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 8 PreInvPairs, 8 NumberOfFragments, 8 HoareAnnotationTreeSize, 8 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 289 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - CounterExampleResult [Line: 1]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.initErr0EnsuresViolation CFG has 4 procedures, 41 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=41occurred 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: [L559] int length = __VERIFIER_nondet_int(); [L560] int n = __VERIFIER_nondet_int(); [L561] COND FALSE !(length < 1) VAL [length=3, n=0] [L564] COND TRUE n < 1 [L565] n = 1 VAL [length=3, n=1] [L567] EXPR, FCALL __builtin_alloca (n * sizeof(char)) VAL [__builtin_alloca (n * sizeof(char))={6:0}, length=3, n=1] [L567] char* nondetArea = (char*) __builtin_alloca (n * sizeof(char)); VAL [__builtin_alloca (n * sizeof(char))={6:0}, length=3, n=1, nondetArea={6:0}] [L568] EXPR, FCALL __builtin_alloca (length * sizeof(char)) VAL [__builtin_alloca (length * sizeof(char))={5:0}, __builtin_alloca (n * sizeof(char))={6:0}, length=3, n=1, nondetArea={6:0}] [L568] char* nondetString = (char*) __builtin_alloca (length * sizeof(char)); VAL [__builtin_alloca (length * sizeof(char))={5:0}, __builtin_alloca (n * sizeof(char))={6:0}, length=3, n=1, nondetArea={6:0}, nondetString={5:0}] [L569] FCALL nondetString[length-1] = '\0' VAL [__builtin_alloca (length * sizeof(char))={5:0}, __builtin_alloca (n * sizeof(char))={6:0}, length=3, n=1, nondetArea={6:0}, nondetString={5:0}] [L570] CALL cstrncpy(nondetArea, nondetString, n) VAL [\old(n)=1, s1={6:0}, s2={5:0}] [L542] char *dst = s1; [L543] const char *src = s2; [L544] char *us; [L545] int n2; VAL [\old(n)=1, dst={6:0}, n=1, s1={6:0}, s1={6:0}, s2={5:0}, s2={5:0}, src={5:0}] [L546] COND TRUE n > 0 [L547] n-- [L548] EXPR dst++ [L548] EXPR src++ VAL [\old(n)=1, dst={6:1}, dst++={6:0}, n=0, s1={6:0}, s1={6:0}, s2={5:0}, s2={5:0}, src={5:1}, src++=7src++={5:0}] [L548] EXPR, FCALL *dst++ = *src++ VAL [\old(n)=1, dst={6:1}, dst++={6:0}, n=0, s1={6:0}, s1={6:0}, s2={5:0}, s2={5:0}, src={5:1}, src++={5:0}src++=7] [L548] COND FALSE !((*dst++ = *src++) == '\0') [L546] COND FALSE !(n > 0) VAL [\old(n)=1, dst={6:1}, n=0, s1={6:0}, s1={6:0}, s2={5:0}, s2={5:0}, src={5:1}] [L556] RET return s1; VAL [\old(n)=1, \result={6:0}, dst={6:1}, n=0, s1={6:0}, s1={6:0}, s2={5:0}, s2={5:0}, src={5:1}] [L570] cstrncpy(nondetArea, nondetString, n) VAL [__builtin_alloca (length * sizeof(char))={5:0}, __builtin_alloca (n * sizeof(char))={6:0}, cstrncpy(nondetArea, nondetString, n)={6:0}, length=3, n=1, nondetArea={6:0}, nondetString={5:0}] [L571] return 0; - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0EnsuresViolation CFG has 4 procedures, 41 locations, 4 error locations. UNSAFE Result, 1.1s OverallTime, 4 OverallIterations, 2 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 134 SDtfs, 59 SDslu, 312 SDs, 0 SdLazy, 116 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 57 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=3, 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, 3 MinimizatonAttempts, 7 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 154 NumberOfCodeBlocks, 154 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 117 ConstructedInterpolants, 0 QuantifiedInterpolants, 11759 SizeOfPredicates, 6 NumberOfNonLiveVariables, 139 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 0/4 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - PositiveResult [Line: 558]: 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, 41 locations, 4 error locations. SAFE Result, 0.9s OverallTime, 4 OverallIterations, 2 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 146 SDtfs, 48 SDslu, 146 SDs, 0 SdLazy, 301 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 113 NumberOfCodeBlocks, 113 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 109 ConstructedInterpolants, 0 QuantifiedInterpolants, 12281 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 4/4 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - InvariantResult [Line: 546]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 551]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be incorrect! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrncpy-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-23_14-21-30-986.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrncpy-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-23_14-21-30-986.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrncpy-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-23_14-21-30-986.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrncpy-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-23_14-21-30-986.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrncpy-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-3-2018-01-23_14-21-30-986.csv Received shutdown request...