java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf -i ../../../trunk/examples/svcomp/array-memsafety/cstrcat-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 19:44:05,678 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 19:44:05,679 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 19:44:05,692 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 19:44:05,692 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 19:44:05,693 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 19:44:05,694 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 19:44:05,696 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 19:44:05,697 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 19:44:05,698 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 19:44:05,699 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 19:44:05,699 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 19:44:05,699 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 19:44:05,700 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 19:44:05,701 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 19:44:05,704 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 19:44:05,706 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 19:44:05,708 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 19:44:05,709 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 19:44:05,711 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 19:44:05,713 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-24 19:44:05,714 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-24 19:44:05,714 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-24 19:44:05,715 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-24 19:44:05,716 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-24 19:44:05,717 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-24 19:44:05,717 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-24 19:44:05,718 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-24 19:44:05,718 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-24 19:44:05,718 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 19:44:05,719 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 19:44:05,719 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf [2018-01-24 19:44:05,730 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 19:44:05,731 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 19:44:05,731 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 19:44:05,732 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 19:44:05,732 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 19:44:05,732 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-24 19:44:05,732 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 19:44:05,732 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-24 19:44:05,733 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 19:44:05,733 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 19:44:05,734 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 19:44:05,734 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 19:44:05,734 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 19:44:05,734 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 19:44:05,734 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 19:44:05,735 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 19:44:05,735 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 19:44:05,735 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 19:44:05,735 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 19:44:05,735 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 19:44:05,736 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 19:44:05,736 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 19:44:05,736 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 19:44:05,736 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 19:44:05,736 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 19:44:05,737 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 19:44:05,737 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 19:44:05,737 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 19:44:05,737 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 19:44:05,737 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 19:44:05,738 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-24 19:44:05,738 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 19:44:05,738 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 19:44:05,738 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 19:44:05,738 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-24 19:44:05,739 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 19:44:05,739 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 19:44:05,777 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 19:44:05,791 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 19:44:05,796 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 19:44:05,797 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 19:44:05,797 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 19:44:05,798 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/cstrcat-alloca_true-valid-memsafety_true-termination.i [2018-01-24 19:44:05,955 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 19:44:05,962 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 19:44:05,963 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 19:44:05,963 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 19:44:05,969 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 19:44:05,970 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 07:44:05" (1/1) ... [2018-01-24 19:44:05,972 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e47ad9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 07:44:05, skipping insertion in model container [2018-01-24 19:44:05,972 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 07:44:05" (1/1) ... [2018-01-24 19:44:05,991 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 19:44:06,031 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 19:44:06,142 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 19:44:06,159 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 19:44:06,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 07:44:06 WrapperNode [2018-01-24 19:44:06,169 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 19:44:06,170 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 19:44:06,170 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 19:44:06,170 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 19:44:06,188 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 07:44:06" (1/1) ... [2018-01-24 19:44:06,188 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 07:44:06" (1/1) ... [2018-01-24 19:44:06,198 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 07:44:06" (1/1) ... [2018-01-24 19:44:06,198 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 07:44:06" (1/1) ... [2018-01-24 19:44:06,203 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 07:44:06" (1/1) ... [2018-01-24 19:44:06,206 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 07:44:06" (1/1) ... [2018-01-24 19:44:06,208 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 07:44:06" (1/1) ... [2018-01-24 19:44:06,210 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 19:44:06,210 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 19:44:06,211 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 19:44:06,211 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 19:44:06,212 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 07:44:06" (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 [2018-01-24 19:44:06,264 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 19:44:06,264 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 19:44:06,264 INFO L136 BoogieDeclarations]: Found implementation of procedure cstrcat [2018-01-24 19:44:06,264 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 19:44:06,264 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-24 19:44:06,264 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-24 19:44:06,265 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 19:44:06,265 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 19:44:06,265 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 19:44:06,265 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-24 19:44:06,265 INFO L128 BoogieDeclarations]: Found specification of procedure cstrcat [2018-01-24 19:44:06,265 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 19:44:06,265 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 19:44:06,265 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 19:44:06,490 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 19:44:06,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 07:44:06 BoogieIcfgContainer [2018-01-24 19:44:06,491 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 19:44:06,491 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 19:44:06,492 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 19:44:06,493 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 19:44:06,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 07:44:05" (1/3) ... [2018-01-24 19:44:06,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76c1bbf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 07:44:06, skipping insertion in model container [2018-01-24 19:44:06,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 07:44:06" (2/3) ... [2018-01-24 19:44:06,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76c1bbf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 07:44:06, skipping insertion in model container [2018-01-24 19:44:06,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 07:44:06" (3/3) ... [2018-01-24 19:44:06,496 INFO L105 eAbstractionObserver]: Analyzing ICFG cstrcat-alloca_true-valid-memsafety_true-termination.i [2018-01-24 19:44:06,503 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 19:44:06,508 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 11 error locations. [2018-01-24 19:44:06,554 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 19:44:06,554 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 19:44:06,554 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 19:44:06,554 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 19:44:06,554 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 19:44:06,555 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 19:44:06,555 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 19:44:06,555 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 19:44:06,556 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 19:44:06,578 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states. [2018-01-24 19:44:06,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-01-24 19:44:06,585 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 19:44:06,586 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 19:44:06,586 INFO L371 AbstractCegarLoop]: === Iteration 1 === [cstrcatErr0RequiresViolation, cstrcatErr2RequiresViolation, cstrcatErr1RequiresViolation, cstrcatErr5RequiresViolation, cstrcatErr3RequiresViolation, cstrcatErr4RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 19:44:06,592 INFO L82 PathProgramCache]: Analyzing trace with hash 104454547, now seen corresponding path program 1 times [2018-01-24 19:44:06,595 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 19:44:06,639 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 19:44:06,639 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 19:44:06,640 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 19:44:06,640 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 19:44:06,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 19:44:06,692 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 19:44:06,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 19:44:06,769 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 19:44:06,769 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-24 19:44:06,770 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 19:44:06,773 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-24 19:44:06,787 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-24 19:44:06,788 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 19:44:06,790 INFO L87 Difference]: Start difference. First operand 49 states. Second operand 3 states. [2018-01-24 19:44:06,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 19:44:06,964 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2018-01-24 19:44:06,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-24 19:44:06,966 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-01-24 19:44:06,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 19:44:06,979 INFO L225 Difference]: With dead ends: 72 [2018-01-24 19:44:06,979 INFO L226 Difference]: Without dead ends: 46 [2018-01-24 19:44:06,983 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 [2018-01-24 19:44:07,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-01-24 19:44:07,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-01-24 19:44:07,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-01-24 19:44:07,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2018-01-24 19:44:07,021 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 11 [2018-01-24 19:44:07,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 19:44:07,021 INFO L432 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2018-01-24 19:44:07,021 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-24 19:44:07,021 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2018-01-24 19:44:07,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-24 19:44:07,022 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 19:44:07,022 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 19:44:07,022 INFO L371 AbstractCegarLoop]: === Iteration 2 === [cstrcatErr0RequiresViolation, cstrcatErr2RequiresViolation, cstrcatErr1RequiresViolation, cstrcatErr5RequiresViolation, cstrcatErr3RequiresViolation, cstrcatErr4RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 19:44:07,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1017224676, now seen corresponding path program 1 times [2018-01-24 19:44:07,022 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 19:44:07,023 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 19:44:07,024 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 19:44:07,024 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 19:44:07,024 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 19:44:07,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 19:44:07,046 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 19:44:07,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 19:44:07,113 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 19:44:07,113 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 19:44:07,113 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 19:44:07,115 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 19:44:07,115 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 19:44:07,116 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 19:44:07,116 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 4 states. [2018-01-24 19:44:07,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 19:44:07,181 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2018-01-24 19:44:07,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 19:44:07,182 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2018-01-24 19:44:07,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 19:44:07,183 INFO L225 Difference]: With dead ends: 46 [2018-01-24 19:44:07,183 INFO L226 Difference]: Without dead ends: 45 [2018-01-24 19:44:07,184 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 19:44:07,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-01-24 19:44:07,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-01-24 19:44:07,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-01-24 19:44:07,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2018-01-24 19:44:07,191 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 15 [2018-01-24 19:44:07,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 19:44:07,191 INFO L432 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2018-01-24 19:44:07,191 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 19:44:07,192 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2018-01-24 19:44:07,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-24 19:44:07,192 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 19:44:07,192 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 19:44:07,193 INFO L371 AbstractCegarLoop]: === Iteration 3 === [cstrcatErr0RequiresViolation, cstrcatErr2RequiresViolation, cstrcatErr1RequiresViolation, cstrcatErr5RequiresViolation, cstrcatErr3RequiresViolation, cstrcatErr4RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 19:44:07,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1017224677, now seen corresponding path program 1 times [2018-01-24 19:44:07,193 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 19:44:07,194 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 19:44:07,194 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 19:44:07,194 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 19:44:07,195 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 19:44:07,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 19:44:07,215 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 19:44:07,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 19:44:07,337 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 19:44:07,337 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 19:44:07,337 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 19:44:07,338 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 19:44:07,338 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 19:44:07,338 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-01-24 19:44:07,338 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 6 states. [2018-01-24 19:44:07,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 19:44:07,414 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2018-01-24 19:44:07,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 19:44:07,415 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2018-01-24 19:44:07,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 19:44:07,416 INFO L225 Difference]: With dead ends: 45 [2018-01-24 19:44:07,416 INFO L226 Difference]: Without dead ends: 44 [2018-01-24 19:44:07,416 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-01-24 19:44:07,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-01-24 19:44:07,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-01-24 19:44:07,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-01-24 19:44:07,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2018-01-24 19:44:07,423 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 15 [2018-01-24 19:44:07,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 19:44:07,423 INFO L432 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2018-01-24 19:44:07,423 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 19:44:07,423 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2018-01-24 19:44:07,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-01-24 19:44:07,424 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 19:44:07,424 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 19:44:07,424 INFO L371 AbstractCegarLoop]: === Iteration 4 === [cstrcatErr0RequiresViolation, cstrcatErr2RequiresViolation, cstrcatErr1RequiresViolation, cstrcatErr5RequiresViolation, cstrcatErr3RequiresViolation, cstrcatErr4RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 19:44:07,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1469193927, now seen corresponding path program 1 times [2018-01-24 19:44:07,425 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 19:44:07,426 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 19:44:07,426 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 19:44:07,426 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 19:44:07,427 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 19:44:07,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 19:44:07,442 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 19:44:07,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 19:44:07,489 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 19:44:07,489 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 19:44:07,489 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 19:44:07,489 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 19:44:07,489 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 19:44:07,489 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 19:44:07,490 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 4 states. [2018-01-24 19:44:07,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 19:44:07,550 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2018-01-24 19:44:07,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 19:44:07,551 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2018-01-24 19:44:07,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 19:44:07,552 INFO L225 Difference]: With dead ends: 44 [2018-01-24 19:44:07,552 INFO L226 Difference]: Without dead ends: 43 [2018-01-24 19:44:07,552 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 19:44:07,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-01-24 19:44:07,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-01-24 19:44:07,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-01-24 19:44:07,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2018-01-24 19:44:07,558 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 16 [2018-01-24 19:44:07,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 19:44:07,559 INFO L432 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2018-01-24 19:44:07,559 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 19:44:07,559 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2018-01-24 19:44:07,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-01-24 19:44:07,560 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 19:44:07,560 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 19:44:07,560 INFO L371 AbstractCegarLoop]: === Iteration 5 === [cstrcatErr0RequiresViolation, cstrcatErr2RequiresViolation, cstrcatErr1RequiresViolation, cstrcatErr5RequiresViolation, cstrcatErr3RequiresViolation, cstrcatErr4RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 19:44:07,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1469193928, now seen corresponding path program 1 times [2018-01-24 19:44:07,560 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 19:44:07,561 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 19:44:07,562 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 19:44:07,562 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 19:44:07,562 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 19:44:07,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 19:44:07,576 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 19:44:07,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 19:44:07,640 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 19:44:07,677 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 19:44:07,677 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 19:44:07,678 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 19:44:07,678 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 19:44:07,678 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-01-24 19:44:07,678 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 6 states. [2018-01-24 19:44:07,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 19:44:07,782 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2018-01-24 19:44:07,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 19:44:07,782 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2018-01-24 19:44:07,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 19:44:07,785 INFO L225 Difference]: With dead ends: 59 [2018-01-24 19:44:07,785 INFO L226 Difference]: Without dead ends: 58 [2018-01-24 19:44:07,785 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2018-01-24 19:44:07,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-01-24 19:44:07,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 50. [2018-01-24 19:44:07,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-01-24 19:44:07,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2018-01-24 19:44:07,796 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 16 [2018-01-24 19:44:07,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 19:44:07,797 INFO L432 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2018-01-24 19:44:07,797 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 19:44:07,797 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2018-01-24 19:44:07,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-01-24 19:44:07,797 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 19:44:07,797 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 19:44:07,798 INFO L371 AbstractCegarLoop]: === Iteration 6 === [cstrcatErr0RequiresViolation, cstrcatErr2RequiresViolation, cstrcatErr1RequiresViolation, cstrcatErr5RequiresViolation, cstrcatErr3RequiresViolation, cstrcatErr4RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 19:44:07,798 INFO L82 PathProgramCache]: Analyzing trace with hash 659847302, now seen corresponding path program 1 times [2018-01-24 19:44:07,798 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 19:44:07,799 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 19:44:07,799 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 19:44:07,799 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 19:44:07,799 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 19:44:07,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 19:44:07,812 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 19:44:07,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 19:44:07,912 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 19:44:07,912 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 19:44:07,912 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 19:44:07,913 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-24 19:44:07,913 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-24 19:44:07,913 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-01-24 19:44:07,913 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 7 states. [2018-01-24 19:44:08,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 19:44:08,022 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2018-01-24 19:44:08,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-24 19:44:08,022 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2018-01-24 19:44:08,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 19:44:08,023 INFO L225 Difference]: With dead ends: 50 [2018-01-24 19:44:08,023 INFO L226 Difference]: Without dead ends: 49 [2018-01-24 19:44:08,024 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-01-24 19:44:08,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-01-24 19:44:08,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2018-01-24 19:44:08,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-01-24 19:44:08,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2018-01-24 19:44:08,029 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 16 [2018-01-24 19:44:08,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 19:44:08,030 INFO L432 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2018-01-24 19:44:08,030 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-24 19:44:08,030 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2018-01-24 19:44:08,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-24 19:44:08,031 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 19:44:08,031 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 19:44:08,031 INFO L371 AbstractCegarLoop]: === Iteration 7 === [cstrcatErr0RequiresViolation, cstrcatErr2RequiresViolation, cstrcatErr1RequiresViolation, cstrcatErr5RequiresViolation, cstrcatErr3RequiresViolation, cstrcatErr4RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 19:44:08,031 INFO L82 PathProgramCache]: Analyzing trace with hash -262056781, now seen corresponding path program 1 times [2018-01-24 19:44:08,031 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 19:44:08,032 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 19:44:08,032 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 19:44:08,032 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 19:44:08,032 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 19:44:08,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 19:44:08,045 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 19:44:08,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 19:44:08,078 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 19:44:08,078 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 19:44:08,078 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 19:44:08,078 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 19:44:08,079 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 19:44:08,079 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 19:44:08,079 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 5 states. [2018-01-24 19:44:08,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 19:44:08,123 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2018-01-24 19:44:08,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 19:44:08,123 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-01-24 19:44:08,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 19:44:08,124 INFO L225 Difference]: With dead ends: 42 [2018-01-24 19:44:08,124 INFO L226 Difference]: Without dead ends: 41 [2018-01-24 19:44:08,124 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-01-24 19:44:08,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-01-24 19:44:08,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-01-24 19:44:08,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-01-24 19:44:08,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2018-01-24 19:44:08,130 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 20 [2018-01-24 19:44:08,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 19:44:08,131 INFO L432 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2018-01-24 19:44:08,131 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 19:44:08,131 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2018-01-24 19:44:08,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-24 19:44:08,132 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 19:44:08,132 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 19:44:08,132 INFO L371 AbstractCegarLoop]: === Iteration 8 === [cstrcatErr0RequiresViolation, cstrcatErr2RequiresViolation, cstrcatErr1RequiresViolation, cstrcatErr5RequiresViolation, cstrcatErr3RequiresViolation, cstrcatErr4RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 19:44:08,132 INFO L82 PathProgramCache]: Analyzing trace with hash -262056780, now seen corresponding path program 1 times [2018-01-24 19:44:08,132 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 19:44:08,133 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 19:44:08,134 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 19:44:08,134 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 19:44:08,134 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 19:44:08,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 19:44:08,152 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 19:44:08,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 19:44:08,211 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 19:44:08,211 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 19:44:08,211 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 19:44:08,212 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-24 19:44:08,212 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-24 19:44:08,212 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-01-24 19:44:08,213 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 7 states. [2018-01-24 19:44:08,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 19:44:08,341 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2018-01-24 19:44:08,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-24 19:44:08,341 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2018-01-24 19:44:08,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 19:44:08,342 INFO L225 Difference]: With dead ends: 47 [2018-01-24 19:44:08,342 INFO L226 Difference]: Without dead ends: 46 [2018-01-24 19:44:08,342 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2018-01-24 19:44:08,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-01-24 19:44:08,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2018-01-24 19:44:08,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-01-24 19:44:08,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2018-01-24 19:44:08,347 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 20 [2018-01-24 19:44:08,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 19:44:08,348 INFO L432 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2018-01-24 19:44:08,348 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-24 19:44:08,348 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2018-01-24 19:44:08,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-24 19:44:08,349 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 19:44:08,349 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] [2018-01-24 19:44:08,350 INFO L371 AbstractCegarLoop]: === Iteration 9 === [cstrcatErr0RequiresViolation, cstrcatErr2RequiresViolation, cstrcatErr1RequiresViolation, cstrcatErr5RequiresViolation, cstrcatErr3RequiresViolation, cstrcatErr4RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 19:44:08,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1316966177, now seen corresponding path program 1 times [2018-01-24 19:44:08,350 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 19:44:08,351 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 19:44:08,351 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 19:44:08,351 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 19:44:08,351 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 19:44:08,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 19:44:08,362 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 19:44:08,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 19:44:08,557 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 19:44:08,557 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-24 19:44:08,558 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 24 with the following transitions: [2018-01-24 19:44:08,560 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [6], [8], [10], [15], [43], [48], [52], [58], [65], [66], [67], [68], [69], [70], [73], [84], [85], [86], [88] [2018-01-24 19:44:08,617 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-24 19:44:08,617 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-24 19:44:42,805 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-24 19:44:42,807 INFO L268 AbstractInterpreter]: Visited 22 different actions 26 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-01-24 19:44:42,819 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-01-24 19:44:42,819 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 19:44:42,819 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG 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 [2018-01-24 19:44:42,849 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 19:44:42,849 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-24 19:44:42,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 19:44:42,889 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 19:44:42,963 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 11 treesize of output 8 [2018-01-24 19:44:42,965 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 8 treesize of output 7 [2018-01-24 19:44:42,966 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-24 19:44:42,968 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-24 19:44:42,970 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-01-24 19:44:42,970 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2018-01-24 19:44:43,012 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 15 treesize of output 11 [2018-01-24 19:44:43,020 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 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 3 [2018-01-24 19:44:43,020 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-24 19:44:43,022 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-24 19:44:43,024 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-01-24 19:44:43,024 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2018-01-24 19:44:43,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 19:44:43,040 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-24 19:44:43,050 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 13 treesize of output 11 [2018-01-24 19:44:43,072 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2018-01-24 19:44:43,072 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-24 19:44:43,078 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-24 19:44:43,080 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-01-24 19:44:43,080 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:13, output treesize:3 [2018-01-24 19:44:43,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 19:44:43,112 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-01-24 19:44:43,112 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [7] total 13 [2018-01-24 19:44:43,113 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 19:44:43,113 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-24 19:44:43,113 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-24 19:44:43,113 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-01-24 19:44:43,113 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 7 states. [2018-01-24 19:44:43,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 19:44:43,260 INFO L93 Difference]: Finished difference Result 93 states and 99 transitions. [2018-01-24 19:44:43,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 19:44:43,261 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2018-01-24 19:44:43,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 19:44:43,262 INFO L225 Difference]: With dead ends: 93 [2018-01-24 19:44:43,262 INFO L226 Difference]: Without dead ends: 70 [2018-01-24 19:44:43,263 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2018-01-24 19:44:43,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-01-24 19:44:43,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 55. [2018-01-24 19:44:43,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-01-24 19:44:43,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2018-01-24 19:44:43,271 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 23 [2018-01-24 19:44:43,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 19:44:43,272 INFO L432 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2018-01-24 19:44:43,272 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-24 19:44:43,272 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2018-01-24 19:44:43,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-24 19:44:43,273 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 19:44:43,273 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] [2018-01-24 19:44:43,273 INFO L371 AbstractCegarLoop]: === Iteration 10 === [cstrcatErr0RequiresViolation, cstrcatErr2RequiresViolation, cstrcatErr1RequiresViolation, cstrcatErr5RequiresViolation, cstrcatErr3RequiresViolation, cstrcatErr4RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 19:44:43,273 INFO L82 PathProgramCache]: Analyzing trace with hash 37102499, now seen corresponding path program 1 times [2018-01-24 19:44:43,273 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 19:44:43,274 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 19:44:43,274 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 19:44:43,275 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 19:44:43,275 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 19:44:43,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 19:44:43,287 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 19:44:43,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 19:44:43,368 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 19:44:43,368 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-24 19:44:43,368 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 24 with the following transitions: [2018-01-24 19:44:43,368 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [6], [8], [10], [15], [43], [48], [52], [60], [65], [66], [67], [68], [69], [70], [73], [84], [85], [86], [88] [2018-01-24 19:44:43,369 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-24 19:44:43,370 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown