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_precise.epf -i ../../../trunk/examples/svcomp/array-memsafety/cstrspn-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 23:12:37,671 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 23:12:37,673 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 23:12:37,690 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 23:12:37,690 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 23:12:37,691 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 23:12:37,693 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 23:12:37,694 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 23:12:37,697 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 23:12:37,698 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 23:12:37,699 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 23:12:37,699 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 23:12:37,700 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 23:12:37,702 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 23:12:37,702 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 23:12:37,705 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 23:12:37,708 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 23:12:37,710 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 23:12:37,711 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 23:12:37,713 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 23:12:37,715 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-24 23:12:37,715 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-24 23:12:37,716 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-24 23:12:37,717 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-24 23:12:37,718 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-24 23:12:37,719 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-24 23:12:37,720 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-24 23:12:37,720 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-24 23:12:37,721 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-24 23:12:37,721 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 23:12:37,722 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 23:12:37,722 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_precise.epf [2018-01-24 23:12:37,731 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 23:12:37,732 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 23:12:37,732 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 23:12:37,733 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 23:12:37,733 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 23:12:37,733 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-24 23:12:37,733 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 23:12:37,733 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 23:12:37,734 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 23:12:37,734 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 23:12:37,734 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 23:12:37,734 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 23:12:37,734 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 23:12:37,734 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 23:12:37,735 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 23:12:37,735 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 23:12:37,735 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 23:12:37,735 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 23:12:37,735 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 23:12:37,735 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 23:12:37,735 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 23:12:37,736 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 23:12:37,736 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 23:12:37,736 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 23:12:37,736 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 23:12:37,736 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 23:12:37,737 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 23:12:37,737 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 23:12:37,737 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 23:12:37,737 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-24 23:12:37,737 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 23:12:37,737 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 23:12:37,737 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 23:12:37,737 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-24 23:12:37,738 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 23:12:37,738 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 23:12:37,774 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 23:12:37,788 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 23:12:37,792 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 23:12:37,793 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 23:12:37,793 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 23:12:37,794 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/cstrspn-alloca_true-valid-memsafety_true-termination.i [2018-01-24 23:12:37,955 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 23:12:37,960 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 23:12:37,960 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 23:12:37,961 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 23:12:37,966 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 23:12:37,967 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 11:12:37" (1/1) ... [2018-01-24 23:12:37,970 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1365a45b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:12:37, skipping insertion in model container [2018-01-24 23:12:37,970 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 11:12:37" (1/1) ... [2018-01-24 23:12:37,985 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 23:12:38,023 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 23:12:38,153 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 23:12:38,179 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 23:12:38,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:12:38 WrapperNode [2018-01-24 23:12:38,188 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 23:12:38,189 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 23:12:38,190 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 23:12:38,190 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 23:12:38,207 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:12:38" (1/1) ... [2018-01-24 23:12:38,207 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:12:38" (1/1) ... [2018-01-24 23:12:38,216 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:12:38" (1/1) ... [2018-01-24 23:12:38,217 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:12:38" (1/1) ... [2018-01-24 23:12:38,222 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:12:38" (1/1) ... [2018-01-24 23:12:38,226 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:12:38" (1/1) ... [2018-01-24 23:12:38,228 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:12:38" (1/1) ... [2018-01-24 23:12:38,230 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 23:12:38,231 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 23:12:38,231 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 23:12:38,231 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 23:12:38,232 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:12:38" (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 23:12:38,287 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 23:12:38,287 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 23:12:38,287 INFO L136 BoogieDeclarations]: Found implementation of procedure cstrspn [2018-01-24 23:12:38,287 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 23:12:38,288 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-24 23:12:38,288 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-24 23:12:38,288 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 23:12:38,288 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 23:12:38,288 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 23:12:38,288 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-24 23:12:38,288 INFO L128 BoogieDeclarations]: Found specification of procedure cstrspn [2018-01-24 23:12:38,288 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 23:12:38,288 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 23:12:38,288 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 23:12:38,558 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 23:12:38,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 11:12:38 BoogieIcfgContainer [2018-01-24 23:12:38,558 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 23:12:38,559 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 23:12:38,559 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 23:12:38,561 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 23:12:38,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 11:12:37" (1/3) ... [2018-01-24 23:12:38,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60bb3036 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 11:12:38, skipping insertion in model container [2018-01-24 23:12:38,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:12:38" (2/3) ... [2018-01-24 23:12:38,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60bb3036 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 11:12:38, skipping insertion in model container [2018-01-24 23:12:38,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 11:12:38" (3/3) ... [2018-01-24 23:12:38,565 INFO L105 eAbstractionObserver]: Analyzing ICFG cstrspn-alloca_true-valid-memsafety_true-termination.i [2018-01-24 23:12:38,572 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 23:12:38,578 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 15 error locations. [2018-01-24 23:12:38,623 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 23:12:38,624 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 23:12:38,624 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 23:12:38,624 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 23:12:38,624 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 23:12:38,624 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 23:12:38,624 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 23:12:38,624 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 23:12:38,625 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 23:12:38,648 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states. [2018-01-24 23:12:38,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-24 23:12:38,655 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:12:38,656 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:12:38,656 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation, cstrspnErr7RequiresViolation, cstrspnErr5RequiresViolation, cstrspnErr1RequiresViolation, cstrspnErr0RequiresViolation, cstrspnErr6RequiresViolation, cstrspnErr8RequiresViolation, cstrspnErr2RequiresViolation, cstrspnErr4RequiresViolation, cstrspnErr3RequiresViolation, cstrspnErr9RequiresViolation]=== [2018-01-24 23:12:38,661 INFO L82 PathProgramCache]: Analyzing trace with hash 380982983, now seen corresponding path program 1 times [2018-01-24 23:12:38,663 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:12:38,707 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:12:38,707 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:12:38,707 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:12:38,707 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:12:38,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:12:38,776 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:12:38,916 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 23:12:38,919 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:12:38,919 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 23:12:38,919 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:12:38,922 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 23:12:38,999 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 23:12:39,000 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 23:12:39,002 INFO L87 Difference]: Start difference. First operand 58 states. Second operand 4 states. [2018-01-24 23:12:39,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:12:39,143 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2018-01-24 23:12:39,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 23:12:39,145 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-01-24 23:12:39,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:12:39,152 INFO L225 Difference]: With dead ends: 96 [2018-01-24 23:12:39,152 INFO L226 Difference]: Without dead ends: 54 [2018-01-24 23:12:39,155 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 23:12:39,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-01-24 23:12:39,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-01-24 23:12:39,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-01-24 23:12:39,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2018-01-24 23:12:39,184 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 13 [2018-01-24 23:12:39,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:12:39,184 INFO L432 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2018-01-24 23:12:39,184 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 23:12:39,184 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2018-01-24 23:12:39,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-24 23:12:39,185 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:12:39,185 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:12:39,185 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation, cstrspnErr7RequiresViolation, cstrspnErr5RequiresViolation, cstrspnErr1RequiresViolation, cstrspnErr0RequiresViolation, cstrspnErr6RequiresViolation, cstrspnErr8RequiresViolation, cstrspnErr2RequiresViolation, cstrspnErr4RequiresViolation, cstrspnErr3RequiresViolation, cstrspnErr9RequiresViolation]=== [2018-01-24 23:12:39,185 INFO L82 PathProgramCache]: Analyzing trace with hash 380982984, now seen corresponding path program 1 times [2018-01-24 23:12:39,185 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:12:39,186 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:12:39,186 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:12:39,186 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:12:39,186 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:12:39,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:12:39,207 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:12:39,333 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 23:12:39,334 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:12:39,334 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 23:12:39,334 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:12:39,336 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 23:12:39,336 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 23:12:39,336 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-01-24 23:12:39,337 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 6 states. [2018-01-24 23:12:39,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:12:39,509 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2018-01-24 23:12:39,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 23:12:39,509 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-01-24 23:12:39,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:12:39,511 INFO L225 Difference]: With dead ends: 54 [2018-01-24 23:12:39,511 INFO L226 Difference]: Without dead ends: 53 [2018-01-24 23:12:39,512 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-01-24 23:12:39,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-01-24 23:12:39,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-01-24 23:12:39,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-01-24 23:12:39,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2018-01-24 23:12:39,519 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 13 [2018-01-24 23:12:39,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:12:39,520 INFO L432 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2018-01-24 23:12:39,520 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 23:12:39,520 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2018-01-24 23:12:39,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-01-24 23:12:39,521 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:12:39,521 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:12:39,521 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation, cstrspnErr7RequiresViolation, cstrspnErr5RequiresViolation, cstrspnErr1RequiresViolation, cstrspnErr0RequiresViolation, cstrspnErr6RequiresViolation, cstrspnErr8RequiresViolation, cstrspnErr2RequiresViolation, cstrspnErr4RequiresViolation, cstrspnErr3RequiresViolation, cstrspnErr9RequiresViolation]=== [2018-01-24 23:12:39,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1074429420, now seen corresponding path program 1 times [2018-01-24 23:12:39,521 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:12:39,522 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:12:39,523 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:12:39,523 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:12:39,523 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:12:39,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:12:39,536 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:12:39,576 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 23:12:39,577 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:12:39,577 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 23:12:39,577 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:12:39,577 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 23:12:39,577 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 23:12:39,578 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 23:12:39,578 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand 4 states. [2018-01-24 23:12:39,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:12:39,671 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2018-01-24 23:12:39,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 23:12:39,671 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2018-01-24 23:12:39,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:12:39,672 INFO L225 Difference]: With dead ends: 53 [2018-01-24 23:12:39,673 INFO L226 Difference]: Without dead ends: 52 [2018-01-24 23:12:39,673 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 23:12:39,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-01-24 23:12:39,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-01-24 23:12:39,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-01-24 23:12:39,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2018-01-24 23:12:39,680 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 14 [2018-01-24 23:12:39,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:12:39,680 INFO L432 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2018-01-24 23:12:39,681 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 23:12:39,681 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2018-01-24 23:12:39,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-01-24 23:12:39,681 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:12:39,682 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:12:39,682 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation, cstrspnErr7RequiresViolation, cstrspnErr5RequiresViolation, cstrspnErr1RequiresViolation, cstrspnErr0RequiresViolation, cstrspnErr6RequiresViolation, cstrspnErr8RequiresViolation, cstrspnErr2RequiresViolation, cstrspnErr4RequiresViolation, cstrspnErr3RequiresViolation, cstrspnErr9RequiresViolation]=== [2018-01-24 23:12:39,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1074429419, now seen corresponding path program 1 times [2018-01-24 23:12:39,682 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:12:39,683 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:12:39,684 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:12:39,684 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:12:39,684 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:12:39,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:12:39,697 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:12:39,774 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 23:12:39,774 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:12:39,774 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 23:12:39,774 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:12:39,774 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 23:12:39,774 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 23:12:39,775 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 23:12:39,775 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand 5 states. [2018-01-24 23:12:39,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:12:39,846 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2018-01-24 23:12:39,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 23:12:39,846 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-01-24 23:12:39,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:12:39,848 INFO L225 Difference]: With dead ends: 52 [2018-01-24 23:12:39,848 INFO L226 Difference]: Without dead ends: 51 [2018-01-24 23:12:39,848 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-01-24 23:12:39,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-01-24 23:12:39,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-01-24 23:12:39,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-01-24 23:12:39,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2018-01-24 23:12:39,855 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 14 [2018-01-24 23:12:39,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:12:39,855 INFO L432 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2018-01-24 23:12:39,856 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 23:12:39,856 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2018-01-24 23:12:39,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-24 23:12:39,856 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:12:39,856 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:12:39,856 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation, cstrspnErr7RequiresViolation, cstrspnErr5RequiresViolation, cstrspnErr1RequiresViolation, cstrspnErr0RequiresViolation, cstrspnErr6RequiresViolation, cstrspnErr8RequiresViolation, cstrspnErr2RequiresViolation, cstrspnErr4RequiresViolation, cstrspnErr3RequiresViolation, cstrspnErr9RequiresViolation]=== [2018-01-24 23:12:39,856 INFO L82 PathProgramCache]: Analyzing trace with hash -425895657, now seen corresponding path program 1 times [2018-01-24 23:12:39,857 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:12:39,857 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:12:39,858 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:12:39,858 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:12:39,858 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:12:39,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:12:39,871 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:12:39,909 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 23:12:39,909 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:12:39,909 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 23:12:39,909 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:12:39,910 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 23:12:39,910 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 23:12:39,910 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 23:12:39,910 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand 5 states. [2018-01-24 23:12:39,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:12:39,968 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2018-01-24 23:12:39,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 23:12:39,968 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2018-01-24 23:12:39,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:12:39,969 INFO L225 Difference]: With dead ends: 51 [2018-01-24 23:12:39,969 INFO L226 Difference]: Without dead ends: 49 [2018-01-24 23:12:39,969 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 23:12:39,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-01-24 23:12:39,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-01-24 23:12:39,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-01-24 23:12:39,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2018-01-24 23:12:39,974 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 18 [2018-01-24 23:12:39,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:12:39,974 INFO L432 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2018-01-24 23:12:39,974 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 23:12:39,974 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2018-01-24 23:12:39,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-24 23:12:39,975 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:12:39,975 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:12:39,975 INFO L371 AbstractCegarLoop]: === Iteration 6 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation, cstrspnErr7RequiresViolation, cstrspnErr5RequiresViolation, cstrspnErr1RequiresViolation, cstrspnErr0RequiresViolation, cstrspnErr6RequiresViolation, cstrspnErr8RequiresViolation, cstrspnErr2RequiresViolation, cstrspnErr4RequiresViolation, cstrspnErr3RequiresViolation, cstrspnErr9RequiresViolation]=== [2018-01-24 23:12:39,975 INFO L82 PathProgramCache]: Analyzing trace with hash -425895656, now seen corresponding path program 1 times [2018-01-24 23:12:39,975 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:12:39,976 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:12:39,976 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:12:39,976 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:12:39,976 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:12:39,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:12:39,989 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:12:40,086 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 23:12:40,086 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:12:40,196 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-01-24 23:12:40,196 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:12:40,197 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-24 23:12:40,197 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-24 23:12:40,197 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-01-24 23:12:40,197 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 8 states. [2018-01-24 23:12:40,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:12:40,323 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2018-01-24 23:12:40,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-24 23:12:40,323 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2018-01-24 23:12:40,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:12:40,326 INFO L225 Difference]: With dead ends: 75 [2018-01-24 23:12:40,326 INFO L226 Difference]: Without dead ends: 73 [2018-01-24 23:12:40,326 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2018-01-24 23:12:40,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-01-24 23:12:40,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2018-01-24 23:12:40,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-01-24 23:12:40,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2018-01-24 23:12:40,334 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 18 [2018-01-24 23:12:40,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:12:40,335 INFO L432 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2018-01-24 23:12:40,335 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-24 23:12:40,335 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2018-01-24 23:12:40,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-24 23:12:40,336 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:12:40,336 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:12:40,336 INFO L371 AbstractCegarLoop]: === Iteration 7 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation, cstrspnErr7RequiresViolation, cstrspnErr5RequiresViolation, cstrspnErr1RequiresViolation, cstrspnErr0RequiresViolation, cstrspnErr6RequiresViolation, cstrspnErr8RequiresViolation, cstrspnErr2RequiresViolation, cstrspnErr4RequiresViolation, cstrspnErr3RequiresViolation, cstrspnErr9RequiresViolation]=== [2018-01-24 23:12:40,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1156031168, now seen corresponding path program 1 times [2018-01-24 23:12:40,337 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:12:40,338 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:12:40,338 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:12:40,338 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:12:40,338 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:12:40,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:12:40,351 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:12:40,408 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 23:12:40,408 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:12:40,408 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 23:12:40,408 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:12:40,409 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 23:12:40,409 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 23:12:40,409 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 23:12:40,409 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 6 states. [2018-01-24 23:12:40,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:12:40,501 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2018-01-24 23:12:40,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 23:12:40,501 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2018-01-24 23:12:40,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:12:40,502 INFO L225 Difference]: With dead ends: 56 [2018-01-24 23:12:40,503 INFO L226 Difference]: Without dead ends: 53 [2018-01-24 23:12:40,503 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-01-24 23:12:40,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-01-24 23:12:40,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2018-01-24 23:12:40,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-01-24 23:12:40,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2018-01-24 23:12:40,509 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 23 [2018-01-24 23:12:40,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:12:40,510 INFO L432 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2018-01-24 23:12:40,510 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 23:12:40,510 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2018-01-24 23:12:40,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-24 23:12:40,511 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:12:40,511 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:12:40,511 INFO L371 AbstractCegarLoop]: === Iteration 8 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation, cstrspnErr7RequiresViolation, cstrspnErr5RequiresViolation, cstrspnErr1RequiresViolation, cstrspnErr0RequiresViolation, cstrspnErr6RequiresViolation, cstrspnErr8RequiresViolation, cstrspnErr2RequiresViolation, cstrspnErr4RequiresViolation, cstrspnErr3RequiresViolation, cstrspnErr9RequiresViolation]=== [2018-01-24 23:12:40,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1156031167, now seen corresponding path program 1 times [2018-01-24 23:12:40,511 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:12:40,512 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:12:40,512 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:12:40,513 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:12:40,513 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:12:40,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:12:40,525 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:12:40,627 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 23:12:40,627 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:12:40,628 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-01-24 23:12:40,628 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:12:40,628 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-24 23:12:40,628 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-24 23:12:40,628 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-01-24 23:12:40,629 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand 9 states. [2018-01-24 23:12:40,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:12:40,787 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2018-01-24 23:12:40,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-24 23:12:40,787 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2018-01-24 23:12:40,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:12:40,788 INFO L225 Difference]: With dead ends: 70 [2018-01-24 23:12:40,788 INFO L226 Difference]: Without dead ends: 67 [2018-01-24 23:12:40,788 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2018-01-24 23:12:40,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-01-24 23:12:40,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 58. [2018-01-24 23:12:40,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-01-24 23:12:40,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2018-01-24 23:12:40,795 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 23 [2018-01-24 23:12:40,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:12:40,796 INFO L432 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2018-01-24 23:12:40,796 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-24 23:12:40,796 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2018-01-24 23:12:40,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-24 23:12:40,797 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:12:40,797 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] [2018-01-24 23:12:40,797 INFO L371 AbstractCegarLoop]: === Iteration 9 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation, cstrspnErr7RequiresViolation, cstrspnErr5RequiresViolation, cstrspnErr1RequiresViolation, cstrspnErr0RequiresViolation, cstrspnErr6RequiresViolation, cstrspnErr8RequiresViolation, cstrspnErr2RequiresViolation, cstrspnErr4RequiresViolation, cstrspnErr3RequiresViolation, cstrspnErr9RequiresViolation]=== [2018-01-24 23:12:40,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1785224664, now seen corresponding path program 1 times [2018-01-24 23:12:40,798 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:12:40,799 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:12:40,799 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:12:40,799 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:12:40,799 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:12:40,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:12:40,811 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:12:40,843 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 23:12:40,843 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:12:40,843 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 23:12:40,843 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:12:40,844 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-24 23:12:40,844 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-24 23:12:40,844 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 23:12:40,844 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 3 states. [2018-01-24 23:12:40,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:12:40,857 INFO L93 Difference]: Finished difference Result 98 states and 113 transitions. [2018-01-24 23:12:40,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-24 23:12:40,857 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2018-01-24 23:12:40,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:12:40,859 INFO L225 Difference]: With dead ends: 98 [2018-01-24 23:12:40,859 INFO L226 Difference]: Without dead ends: 60 [2018-01-24 23:12:40,859 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 23:12:40,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-01-24 23:12:40,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-01-24 23:12:40,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-01-24 23:12:40,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2018-01-24 23:12:40,868 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 28 [2018-01-24 23:12:40,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:12:40,868 INFO L432 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2018-01-24 23:12:40,868 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-24 23:12:40,869 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2018-01-24 23:12:40,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-24 23:12:40,869 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:12:40,870 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] [2018-01-24 23:12:40,870 INFO L371 AbstractCegarLoop]: === Iteration 10 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation, cstrspnErr7RequiresViolation, cstrspnErr5RequiresViolation, cstrspnErr1RequiresViolation, cstrspnErr0RequiresViolation, cstrspnErr6RequiresViolation, cstrspnErr8RequiresViolation, cstrspnErr2RequiresViolation, cstrspnErr4RequiresViolation, cstrspnErr3RequiresViolation, cstrspnErr9RequiresViolation]=== [2018-01-24 23:12:40,870 INFO L82 PathProgramCache]: Analyzing trace with hash -419708018, now seen corresponding path program 1 times [2018-01-24 23:12:40,870 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:12:40,871 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:12:40,871 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:12:40,871 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:12:40,872 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:12:40,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:12:40,886 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:12:41,011 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 23:12:41,012 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:12:41,012 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 23:12:41,012 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:12:41,012 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 23:12:41,013 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 23:12:41,013 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 23:12:41,013 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand 6 states. [2018-01-24 23:12:41,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:12:41,262 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2018-01-24 23:12:41,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-24 23:12:41,262 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2018-01-24 23:12:41,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:12:41,263 INFO L225 Difference]: With dead ends: 60 [2018-01-24 23:12:41,263 INFO L226 Difference]: Without dead ends: 50 [2018-01-24 23:12:41,263 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-01-24 23:12:41,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-01-24 23:12:41,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-01-24 23:12:41,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-01-24 23:12:41,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2018-01-24 23:12:41,270 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 28 [2018-01-24 23:12:41,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:12:41,271 INFO L432 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2018-01-24 23:12:41,271 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 23:12:41,271 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2018-01-24 23:12:41,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-24 23:12:41,271 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:12:41,272 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] [2018-01-24 23:12:41,272 INFO L371 AbstractCegarLoop]: === Iteration 11 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation, cstrspnErr7RequiresViolation, cstrspnErr5RequiresViolation, cstrspnErr1RequiresViolation, cstrspnErr0RequiresViolation, cstrspnErr6RequiresViolation, cstrspnErr8RequiresViolation, cstrspnErr2RequiresViolation, cstrspnErr4RequiresViolation, cstrspnErr3RequiresViolation, cstrspnErr9RequiresViolation]=== [2018-01-24 23:12:41,272 INFO L82 PathProgramCache]: Analyzing trace with hash -2090509973, now seen corresponding path program 1 times [2018-01-24 23:12:41,272 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:12:41,273 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:12:41,273 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:12:41,273 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:12:41,273 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:12:41,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:12:41,292 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:12:41,622 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 23:12:41,622 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 23:12:41,623 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-24 23:12:41,624 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 31 with the following transitions: [2018-01-24 23:12:41,626 INFO L201 CegarAbsIntRunner]: [0], [1], [5], [8], [16], [18], [19], [20], [21], [22], [25], [36], [40], [41], [48], [49], [52], [56], [58], [60], [61], [64], [65], [68], [76], [94], [95], [96], [98] [2018-01-24 23:12:41,677 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-24 23:12:41,678 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