java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem13_label27_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 16:22:11,547 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 16:22:11,550 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 16:22:11,569 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 16:22:11,569 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 16:22:11,570 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 16:22:11,571 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 16:22:11,573 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 16:22:11,575 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 16:22:11,576 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 16:22:11,577 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 16:22:11,577 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 16:22:11,578 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 16:22:11,579 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 16:22:11,580 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 16:22:11,581 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 16:22:11,582 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 16:22:11,584 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 16:22:11,586 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 16:22:11,587 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 16:22:11,588 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 16:22:11,590 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 16:22:11,593 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-24 16:22:11,593 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-24 16:22:11,593 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-24 16:22:11,594 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-24 16:22:11,595 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-24 16:22:11,596 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-24 16:22:11,597 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-24 16:22:11,598 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-24 16:22:11,598 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-24 16:22:11,600 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-24 16:22:11,602 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-24 16:22:11,630 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 16:22:11,630 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 16:22:11,631 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 16:22:11,631 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 16:22:11,632 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 16:22:11,632 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 16:22:11,632 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 16:22:11,632 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 16:22:11,633 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 16:22:11,633 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 16:22:11,633 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 16:22:11,633 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 16:22:11,633 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 16:22:11,634 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 16:22:11,634 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 16:22:11,634 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 16:22:11,634 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 16:22:11,635 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 16:22:11,635 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 16:22:11,635 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 16:22:11,635 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 16:22:11,635 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 16:22:11,636 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 16:22:11,636 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 16:22:11,636 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 16:22:11,636 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 16:22:11,636 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 16:22:11,637 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 16:22:11,685 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 16:22:11,703 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 16:22:11,707 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 16:22:11,709 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 16:22:11,709 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 16:22:11,710 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label27_true-unreach-call.c [2018-10-24 16:22:11,778 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/0202393df/b12647567ed0485c9a72c19bbdc5e454/FLAGa360b5c1c [2018-10-24 16:22:12,584 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 16:22:12,585 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label27_true-unreach-call.c [2018-10-24 16:22:12,624 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/0202393df/b12647567ed0485c9a72c19bbdc5e454/FLAGa360b5c1c [2018-10-24 16:22:12,645 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/0202393df/b12647567ed0485c9a72c19bbdc5e454 [2018-10-24 16:22:12,657 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 16:22:12,659 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 16:22:12,660 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 16:22:12,660 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 16:22:12,664 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 16:22:12,666 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:22:12" (1/1) ... [2018-10-24 16:22:12,669 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6895558e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:22:12, skipping insertion in model container [2018-10-24 16:22:12,669 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:22:12" (1/1) ... [2018-10-24 16:22:12,680 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 16:22:12,885 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 16:22:14,436 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 16:22:14,443 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 16:22:15,288 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 16:22:15,333 INFO L193 MainTranslator]: Completed translation [2018-10-24 16:22:15,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:22:15 WrapperNode [2018-10-24 16:22:15,334 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 16:22:15,335 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 16:22:15,335 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 16:22:15,336 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 16:22:15,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:22:15" (1/1) ... [2018-10-24 16:22:15,435 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:22:15" (1/1) ... [2018-10-24 16:22:16,242 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 16:22:16,243 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 16:22:16,243 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 16:22:16,243 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 16:22:16,255 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:22:15" (1/1) ... [2018-10-24 16:22:16,255 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:22:15" (1/1) ... [2018-10-24 16:22:16,353 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:22:15" (1/1) ... [2018-10-24 16:22:16,354 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:22:15" (1/1) ... [2018-10-24 16:22:16,576 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:22:15" (1/1) ... [2018-10-24 16:22:16,622 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:22:15" (1/1) ... [2018-10-24 16:22:16,702 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:22:15" (1/1) ... [2018-10-24 16:22:16,780 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 16:22:16,781 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 16:22:16,781 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 16:22:16,782 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 16:22:16,783 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:22:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-24 16:22:16,857 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-24 16:22:16,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 16:22:16,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 16:22:32,604 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 16:22:32,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:22:32 BoogieIcfgContainer [2018-10-24 16:22:32,605 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 16:22:32,606 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 16:22:32,606 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 16:22:32,610 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 16:22:32,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 04:22:12" (1/3) ... [2018-10-24 16:22:32,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78ebbee9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:22:32, skipping insertion in model container [2018-10-24 16:22:32,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:22:15" (2/3) ... [2018-10-24 16:22:32,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78ebbee9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:22:32, skipping insertion in model container [2018-10-24 16:22:32,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:22:32" (3/3) ... [2018-10-24 16:22:32,614 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label27_true-unreach-call.c [2018-10-24 16:22:32,624 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 16:22:32,635 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 16:22:32,653 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 16:22:32,715 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 16:22:32,715 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 16:22:32,716 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 16:22:32,716 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 16:22:32,716 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 16:22:32,716 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 16:22:32,716 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 16:22:32,716 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 16:22:32,717 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 16:22:32,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states. [2018-10-24 16:22:32,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-24 16:22:32,777 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:22:32,778 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:22:32,780 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:22:32,785 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:22:32,786 INFO L82 PathProgramCache]: Analyzing trace with hash 279835594, now seen corresponding path program 1 times [2018-10-24 16:22:32,788 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:22:32,788 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:22:32,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:22:32,845 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:22:32,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:22:32,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:22:33,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:22:33,288 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:22:33,289 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:22:33,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:22:33,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:22:33,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:22:33,314 INFO L87 Difference]: Start difference. First operand 1099 states. Second operand 4 states. [2018-10-24 16:22:47,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:22:47,950 INFO L93 Difference]: Finished difference Result 3896 states and 7286 transitions. [2018-10-24 16:22:47,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:22:47,952 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2018-10-24 16:22:47,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:22:47,997 INFO L225 Difference]: With dead ends: 3896 [2018-10-24 16:22:47,998 INFO L226 Difference]: Without dead ends: 2790 [2018-10-24 16:22:48,008 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:22:48,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2790 states. [2018-10-24 16:22:48,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2790 to 1945. [2018-10-24 16:22:48,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1945 states. [2018-10-24 16:22:48,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1945 states to 1945 states and 3412 transitions. [2018-10-24 16:22:48,166 INFO L78 Accepts]: Start accepts. Automaton has 1945 states and 3412 transitions. Word has length 46 [2018-10-24 16:22:48,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:22:48,167 INFO L481 AbstractCegarLoop]: Abstraction has 1945 states and 3412 transitions. [2018-10-24 16:22:48,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:22:48,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1945 states and 3412 transitions. [2018-10-24 16:22:48,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-24 16:22:48,173 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:22:48,173 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:22:48,173 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:22:48,174 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:22:48,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1500396782, now seen corresponding path program 1 times [2018-10-24 16:22:48,174 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:22:48,174 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:22:48,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:22:48,175 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:22:48,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:22:48,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:22:48,702 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 27 [2018-10-24 16:22:48,913 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:22:48,915 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:22:48,915 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:22:48,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:22:48,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:22:48,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:22:48,920 INFO L87 Difference]: Start difference. First operand 1945 states and 3412 transitions. Second operand 5 states. [2018-10-24 16:22:49,154 WARN L179 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-10-24 16:23:06,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:23:06,969 INFO L93 Difference]: Finished difference Result 7061 states and 12475 transitions. [2018-10-24 16:23:06,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 16:23:06,975 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 112 [2018-10-24 16:23:06,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:23:07,002 INFO L225 Difference]: With dead ends: 7061 [2018-10-24 16:23:07,003 INFO L226 Difference]: Without dead ends: 5118 [2018-10-24 16:23:07,008 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-24 16:23:07,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5118 states. [2018-10-24 16:23:07,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5118 to 5117. [2018-10-24 16:23:07,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5117 states. [2018-10-24 16:23:07,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5117 states to 5117 states and 7612 transitions. [2018-10-24 16:23:07,316 INFO L78 Accepts]: Start accepts. Automaton has 5117 states and 7612 transitions. Word has length 112 [2018-10-24 16:23:07,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:23:07,317 INFO L481 AbstractCegarLoop]: Abstraction has 5117 states and 7612 transitions. [2018-10-24 16:23:07,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:23:07,317 INFO L276 IsEmpty]: Start isEmpty. Operand 5117 states and 7612 transitions. [2018-10-24 16:23:07,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-24 16:23:07,330 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:23:07,331 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:23:07,331 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:23:07,334 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:23:07,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1448093035, now seen corresponding path program 1 times [2018-10-24 16:23:07,334 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:23:07,334 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:23:07,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:23:07,336 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:23:07,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:23:07,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:23:07,845 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2018-10-24 16:23:07,845 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:23:07,845 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-24 16:23:07,862 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:23:07,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:23:07,939 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:23:08,066 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:23:08,100 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:23:08,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2018-10-24 16:23:08,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:23:08,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:23:08,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:23:08,105 INFO L87 Difference]: Start difference. First operand 5117 states and 7612 transitions. Second operand 5 states. [2018-10-24 16:23:25,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:23:25,433 INFO L93 Difference]: Finished difference Result 16567 states and 26030 transitions. [2018-10-24 16:23:25,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 16:23:25,433 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 172 [2018-10-24 16:23:25,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:23:25,491 INFO L225 Difference]: With dead ends: 16567 [2018-10-24 16:23:25,491 INFO L226 Difference]: Without dead ends: 12240 [2018-10-24 16:23:25,500 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 173 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-24 16:23:25,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12240 states. [2018-10-24 16:23:25,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12240 to 12209. [2018-10-24 16:23:25,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12209 states. [2018-10-24 16:23:25,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12209 states to 12209 states and 15208 transitions. [2018-10-24 16:23:25,721 INFO L78 Accepts]: Start accepts. Automaton has 12209 states and 15208 transitions. Word has length 172 [2018-10-24 16:23:25,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:23:25,722 INFO L481 AbstractCegarLoop]: Abstraction has 12209 states and 15208 transitions. [2018-10-24 16:23:25,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:23:25,722 INFO L276 IsEmpty]: Start isEmpty. Operand 12209 states and 15208 transitions. [2018-10-24 16:23:25,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2018-10-24 16:23:25,728 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:23:25,729 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:23:25,729 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:23:25,729 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:23:25,729 INFO L82 PathProgramCache]: Analyzing trace with hash 991684463, now seen corresponding path program 1 times [2018-10-24 16:23:25,729 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:23:25,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:23:25,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:23:25,731 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:23:25,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:23:25,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:23:26,084 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 87 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-24 16:23:26,085 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:23:26,085 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:23:26,105 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:23:26,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:23:26,188 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:23:26,351 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:23:26,390 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:23:26,391 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2018-10-24 16:23:26,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:23:26,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:23:26,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:23:26,393 INFO L87 Difference]: Start difference. First operand 12209 states and 15208 transitions. Second operand 5 states. [2018-10-24 16:23:40,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:23:40,393 INFO L93 Difference]: Finished difference Result 45733 states and 57505 transitions. [2018-10-24 16:23:40,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 16:23:40,394 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 211 [2018-10-24 16:23:40,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:23:40,485 INFO L225 Difference]: With dead ends: 45733 [2018-10-24 16:23:40,485 INFO L226 Difference]: Without dead ends: 34314 [2018-10-24 16:23:40,503 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:23:40,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34314 states. [2018-10-24 16:23:41,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34314 to 26393. [2018-10-24 16:23:41,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26393 states. [2018-10-24 16:23:41,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26393 states to 26393 states and 31447 transitions. [2018-10-24 16:23:41,042 INFO L78 Accepts]: Start accepts. Automaton has 26393 states and 31447 transitions. Word has length 211 [2018-10-24 16:23:41,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:23:41,042 INFO L481 AbstractCegarLoop]: Abstraction has 26393 states and 31447 transitions. [2018-10-24 16:23:41,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:23:41,043 INFO L276 IsEmpty]: Start isEmpty. Operand 26393 states and 31447 transitions. [2018-10-24 16:23:41,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-10-24 16:23:41,047 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:23:41,047 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:23:41,048 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:23:41,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:23:41,048 INFO L82 PathProgramCache]: Analyzing trace with hash 230599966, now seen corresponding path program 1 times [2018-10-24 16:23:41,048 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:23:41,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:23:41,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:23:41,050 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:23:41,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:23:41,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:23:41,391 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-10-24 16:23:41,391 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:23:41,391 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 16:23:41,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 16:23:41,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 16:23:41,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:23:41,393 INFO L87 Difference]: Start difference. First operand 26393 states and 31447 transitions. Second operand 3 states. [2018-10-24 16:23:48,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:23:48,699 INFO L93 Difference]: Finished difference Result 74845 states and 89593 transitions. [2018-10-24 16:23:48,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:23:48,699 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 222 [2018-10-24 16:23:48,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:23:48,774 INFO L225 Difference]: With dead ends: 74845 [2018-10-24 16:23:48,774 INFO L226 Difference]: Without dead ends: 49242 [2018-10-24 16:23:48,808 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:23:48,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49242 states. [2018-10-24 16:23:49,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49242 to 49241. [2018-10-24 16:23:49,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49241 states. [2018-10-24 16:23:49,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49241 states to 49241 states and 56078 transitions. [2018-10-24 16:23:49,457 INFO L78 Accepts]: Start accepts. Automaton has 49241 states and 56078 transitions. Word has length 222 [2018-10-24 16:23:49,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:23:49,457 INFO L481 AbstractCegarLoop]: Abstraction has 49241 states and 56078 transitions. [2018-10-24 16:23:49,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 16:23:49,458 INFO L276 IsEmpty]: Start isEmpty. Operand 49241 states and 56078 transitions. [2018-10-24 16:23:49,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2018-10-24 16:23:49,468 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:23:49,468 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:23:49,469 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:23:49,469 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:23:49,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1465928611, now seen corresponding path program 1 times [2018-10-24 16:23:49,469 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:23:49,469 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:23:49,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:23:49,470 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:23:49,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:23:49,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:23:49,993 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 244 proven. 4 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2018-10-24 16:23:49,994 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:23:49,994 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:23:50,003 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:23:50,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:23:50,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:23:50,216 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 340 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2018-10-24 16:23:50,238 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:23:50,238 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2018-10-24 16:23:50,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:23:50,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:23:50,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:23:50,239 INFO L87 Difference]: Start difference. First operand 49241 states and 56078 transitions. Second operand 4 states. [2018-10-24 16:23:58,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:23:58,682 INFO L93 Difference]: Finished difference Result 115854 states and 130464 transitions. [2018-10-24 16:23:58,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:23:58,687 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 339 [2018-10-24 16:23:58,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:23:58,763 INFO L225 Difference]: With dead ends: 115854 [2018-10-24 16:23:58,763 INFO L226 Difference]: Without dead ends: 59475 [2018-10-24 16:23:58,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:23:58,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59475 states. [2018-10-24 16:23:59,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59475 to 51576. [2018-10-24 16:23:59,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51576 states. [2018-10-24 16:23:59,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51576 states to 51576 states and 58058 transitions. [2018-10-24 16:23:59,408 INFO L78 Accepts]: Start accepts. Automaton has 51576 states and 58058 transitions. Word has length 339 [2018-10-24 16:23:59,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:23:59,409 INFO L481 AbstractCegarLoop]: Abstraction has 51576 states and 58058 transitions. [2018-10-24 16:23:59,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:23:59,409 INFO L276 IsEmpty]: Start isEmpty. Operand 51576 states and 58058 transitions. [2018-10-24 16:23:59,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2018-10-24 16:23:59,419 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:23:59,420 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:23:59,420 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:23:59,420 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:23:59,421 INFO L82 PathProgramCache]: Analyzing trace with hash 308408486, now seen corresponding path program 1 times [2018-10-24 16:23:59,421 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:23:59,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:23:59,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:23:59,422 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:23:59,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:23:59,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:23:59,861 WARN L179 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2018-10-24 16:23:59,982 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 358 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2018-10-24 16:23:59,982 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:23:59,982 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:23:59,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:23:59,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:23:59,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:23:59,984 INFO L87 Difference]: Start difference. First operand 51576 states and 58058 transitions. Second operand 4 states. [2018-10-24 16:24:07,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:24:07,881 INFO L93 Difference]: Finished difference Result 109455 states and 122807 transitions. [2018-10-24 16:24:07,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:24:07,882 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 368 [2018-10-24 16:24:07,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:24:07,945 INFO L225 Difference]: With dead ends: 109455 [2018-10-24 16:24:07,945 INFO L226 Difference]: Without dead ends: 55480 [2018-10-24 16:24:07,980 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:24:08,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55480 states. [2018-10-24 16:24:08,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55480 to 50750. [2018-10-24 16:24:08,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50750 states. [2018-10-24 16:24:08,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50750 states to 50750 states and 56418 transitions. [2018-10-24 16:24:08,540 INFO L78 Accepts]: Start accepts. Automaton has 50750 states and 56418 transitions. Word has length 368 [2018-10-24 16:24:08,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:24:08,540 INFO L481 AbstractCegarLoop]: Abstraction has 50750 states and 56418 transitions. [2018-10-24 16:24:08,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:24:08,541 INFO L276 IsEmpty]: Start isEmpty. Operand 50750 states and 56418 transitions. [2018-10-24 16:24:08,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2018-10-24 16:24:08,547 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:24:08,547 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:24:08,547 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:24:08,547 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:24:08,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1225749556, now seen corresponding path program 1 times [2018-10-24 16:24:08,548 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:24:08,548 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:24:08,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:24:08,549 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:24:08,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:24:08,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:24:08,869 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 318 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2018-10-24 16:24:08,870 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:24:08,870 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:24:08,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:24:08,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:24:08,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:24:08,871 INFO L87 Difference]: Start difference. First operand 50750 states and 56418 transitions. Second operand 4 states. [2018-10-24 16:24:18,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:24:18,207 INFO L93 Difference]: Finished difference Result 130680 states and 146216 transitions. [2018-10-24 16:24:18,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:24:18,207 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 388 [2018-10-24 16:24:18,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:24:18,285 INFO L225 Difference]: With dead ends: 130680 [2018-10-24 16:24:18,285 INFO L226 Difference]: Without dead ends: 79928 [2018-10-24 16:24:18,312 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:24:18,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79928 states. [2018-10-24 16:24:18,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79928 to 77539. [2018-10-24 16:24:18,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77539 states. [2018-10-24 16:24:18,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77539 states to 77539 states and 85018 transitions. [2018-10-24 16:24:18,951 INFO L78 Accepts]: Start accepts. Automaton has 77539 states and 85018 transitions. Word has length 388 [2018-10-24 16:24:18,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:24:18,951 INFO L481 AbstractCegarLoop]: Abstraction has 77539 states and 85018 transitions. [2018-10-24 16:24:18,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:24:18,951 INFO L276 IsEmpty]: Start isEmpty. Operand 77539 states and 85018 transitions. [2018-10-24 16:24:18,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2018-10-24 16:24:18,957 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:24:18,958 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:24:18,958 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:24:18,958 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:24:18,959 INFO L82 PathProgramCache]: Analyzing trace with hash -453176567, now seen corresponding path program 1 times [2018-10-24 16:24:18,959 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:24:18,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:24:18,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:24:18,960 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:24:18,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:24:18,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:24:19,500 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 497 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2018-10-24 16:24:19,500 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:24:19,501 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:24:19,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:24:19,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:24:19,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:24:19,502 INFO L87 Difference]: Start difference. First operand 77539 states and 85018 transitions. Second operand 5 states. [2018-10-24 16:24:39,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:24:39,172 INFO L93 Difference]: Finished difference Result 279816 states and 306267 transitions. [2018-10-24 16:24:39,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 16:24:39,173 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 403 [2018-10-24 16:24:39,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:24:39,393 INFO L225 Difference]: With dead ends: 279816 [2018-10-24 16:24:39,394 INFO L226 Difference]: Without dead ends: 203066 [2018-10-24 16:24:39,442 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:24:39,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203066 states. [2018-10-24 16:24:40,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203066 to 187927. [2018-10-24 16:24:40,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187927 states. [2018-10-24 16:24:40,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187927 states to 187927 states and 203464 transitions. [2018-10-24 16:24:40,967 INFO L78 Accepts]: Start accepts. Automaton has 187927 states and 203464 transitions. Word has length 403 [2018-10-24 16:24:40,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:24:40,968 INFO L481 AbstractCegarLoop]: Abstraction has 187927 states and 203464 transitions. [2018-10-24 16:24:40,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:24:40,968 INFO L276 IsEmpty]: Start isEmpty. Operand 187927 states and 203464 transitions. [2018-10-24 16:24:40,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2018-10-24 16:24:40,979 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:24:40,979 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:24:40,980 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:24:40,980 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:24:40,980 INFO L82 PathProgramCache]: Analyzing trace with hash -320703339, now seen corresponding path program 1 times [2018-10-24 16:24:40,980 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:24:40,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:24:40,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:24:40,981 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:24:40,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:24:41,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:24:41,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 787 proven. 0 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2018-10-24 16:24:41,385 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:24:41,385 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:24:41,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:24:41,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:24:41,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:24:41,386 INFO L87 Difference]: Start difference. First operand 187927 states and 203464 transitions. Second operand 4 states. [2018-10-24 16:24:52,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:24:52,880 INFO L93 Difference]: Finished difference Result 375102 states and 406072 transitions. [2018-10-24 16:24:52,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:24:52,881 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 493 [2018-10-24 16:24:52,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:24:53,091 INFO L225 Difference]: With dead ends: 375102 [2018-10-24 16:24:53,091 INFO L226 Difference]: Without dead ends: 186384 [2018-10-24 16:24:53,185 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:24:53,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186384 states. [2018-10-24 16:24:55,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186384 to 182403. [2018-10-24 16:24:55,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182403 states. [2018-10-24 16:24:55,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182403 states to 182403 states and 193216 transitions. [2018-10-24 16:24:55,827 INFO L78 Accepts]: Start accepts. Automaton has 182403 states and 193216 transitions. Word has length 493 [2018-10-24 16:24:55,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:24:55,827 INFO L481 AbstractCegarLoop]: Abstraction has 182403 states and 193216 transitions. [2018-10-24 16:24:55,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:24:55,827 INFO L276 IsEmpty]: Start isEmpty. Operand 182403 states and 193216 transitions. [2018-10-24 16:24:55,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2018-10-24 16:24:55,834 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:24:55,835 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:24:55,835 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:24:55,835 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:24:55,835 INFO L82 PathProgramCache]: Analyzing trace with hash 612784664, now seen corresponding path program 1 times [2018-10-24 16:24:55,836 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:24:55,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:24:55,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:24:55,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:24:55,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:24:55,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:24:56,280 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 656 proven. 0 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2018-10-24 16:24:56,280 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:24:56,280 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:24:56,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:24:56,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:24:56,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:24:56,281 INFO L87 Difference]: Start difference. First operand 182403 states and 193216 transitions. Second operand 4 states. [2018-10-24 16:25:12,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:25:12,211 INFO L93 Difference]: Finished difference Result 404345 states and 428666 transitions. [2018-10-24 16:25:12,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:25:12,211 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 504 [2018-10-24 16:25:12,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:25:12,442 INFO L225 Difference]: With dead ends: 404345 [2018-10-24 16:25:12,442 INFO L226 Difference]: Without dead ends: 222732 [2018-10-24 16:25:12,509 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:25:12,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222732 states. [2018-10-24 16:25:14,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222732 to 219454. [2018-10-24 16:25:14,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219454 states. [2018-10-24 16:25:15,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219454 states to 219454 states and 232235 transitions. [2018-10-24 16:25:15,743 INFO L78 Accepts]: Start accepts. Automaton has 219454 states and 232235 transitions. Word has length 504 [2018-10-24 16:25:15,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:25:15,744 INFO L481 AbstractCegarLoop]: Abstraction has 219454 states and 232235 transitions. [2018-10-24 16:25:15,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:25:15,745 INFO L276 IsEmpty]: Start isEmpty. Operand 219454 states and 232235 transitions. [2018-10-24 16:25:15,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2018-10-24 16:25:15,751 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:25:15,751 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:25:15,751 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:25:15,752 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:25:15,752 INFO L82 PathProgramCache]: Analyzing trace with hash -675463201, now seen corresponding path program 1 times [2018-10-24 16:25:15,752 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:25:15,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:25:15,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:25:15,753 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:25:15,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:25:15,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:25:16,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 711 proven. 0 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2018-10-24 16:25:16,187 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:25:16,187 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:25:16,188 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:25:16,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:25:16,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:25:16,188 INFO L87 Difference]: Start difference. First operand 219454 states and 232235 transitions. Second operand 4 states. [2018-10-24 16:25:26,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:25:26,865 INFO L93 Difference]: Finished difference Result 426248 states and 451399 transitions. [2018-10-24 16:25:26,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:25:26,866 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 523 [2018-10-24 16:25:26,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:25:27,115 INFO L225 Difference]: With dead ends: 426248 [2018-10-24 16:25:27,115 INFO L226 Difference]: Without dead ends: 207584 [2018-10-24 16:25:27,190 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:25:27,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207584 states. [2018-10-24 16:25:29,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207584 to 205219. [2018-10-24 16:25:29,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205219 states. [2018-10-24 16:25:30,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205219 states to 205219 states and 213641 transitions. [2018-10-24 16:25:30,200 INFO L78 Accepts]: Start accepts. Automaton has 205219 states and 213641 transitions. Word has length 523 [2018-10-24 16:25:30,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:25:30,201 INFO L481 AbstractCegarLoop]: Abstraction has 205219 states and 213641 transitions. [2018-10-24 16:25:30,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:25:30,201 INFO L276 IsEmpty]: Start isEmpty. Operand 205219 states and 213641 transitions. [2018-10-24 16:25:30,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 530 [2018-10-24 16:25:30,208 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:25:30,208 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2018-10-24 16:25:30,208 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:25:30,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:25:30,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1848344313, now seen corresponding path program 1 times [2018-10-24 16:25:30,209 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:25:30,209 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:25:30,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:25:30,211 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:25:30,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:25:30,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:25:30,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1011 backedges. 438 proven. 0 refuted. 0 times theorem prover too weak. 573 trivial. 0 not checked. [2018-10-24 16:25:30,650 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:25:30,651 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 16:25:30,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 16:25:30,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 16:25:30,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:25:30,652 INFO L87 Difference]: Start difference. First operand 205219 states and 213641 transitions. Second operand 3 states. [2018-10-24 16:25:36,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:25:36,118 INFO L93 Difference]: Finished difference Result 408849 states and 425628 transitions. [2018-10-24 16:25:36,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:25:36,118 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 529 [2018-10-24 16:25:36,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:25:36,376 INFO L225 Difference]: With dead ends: 408849 [2018-10-24 16:25:36,377 INFO L226 Difference]: Without dead ends: 204418 [2018-10-24 16:25:36,481 INFO L605 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 [2018-10-24 16:25:36,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204418 states. [2018-10-24 16:25:46,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204418 to 204418. [2018-10-24 16:25:46,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204418 states. [2018-10-24 16:25:46,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204418 states to 204418 states and 212765 transitions. [2018-10-24 16:25:46,203 INFO L78 Accepts]: Start accepts. Automaton has 204418 states and 212765 transitions. Word has length 529 [2018-10-24 16:25:46,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:25:46,204 INFO L481 AbstractCegarLoop]: Abstraction has 204418 states and 212765 transitions. [2018-10-24 16:25:46,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 16:25:46,204 INFO L276 IsEmpty]: Start isEmpty. Operand 204418 states and 212765 transitions. [2018-10-24 16:25:46,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2018-10-24 16:25:46,212 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:25:46,212 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:25:46,213 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:25:46,213 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:25:46,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1672619671, now seen corresponding path program 1 times [2018-10-24 16:25:46,213 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:25:46,213 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:25:46,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:25:46,214 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:25:46,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:25:46,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:25:46,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 482 proven. 0 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2018-10-24 16:25:46,680 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:25:46,680 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:25:46,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:25:46,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:25:46,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:25:46,681 INFO L87 Difference]: Start difference. First operand 204418 states and 212765 transitions. Second operand 4 states. [2018-10-24 16:25:55,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:25:55,794 INFO L93 Difference]: Finished difference Result 409652 states and 426349 transitions. [2018-10-24 16:25:55,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:25:55,797 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 534 [2018-10-24 16:25:55,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:25:56,049 INFO L225 Difference]: With dead ends: 409652 [2018-10-24 16:25:56,050 INFO L226 Difference]: Without dead ends: 206024 [2018-10-24 16:25:56,128 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:25:56,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206024 states. [2018-10-24 16:25:58,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206024 to 194959. [2018-10-24 16:25:58,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194959 states. [2018-10-24 16:25:58,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194959 states to 194959 states and 201192 transitions. [2018-10-24 16:25:58,647 INFO L78 Accepts]: Start accepts. Automaton has 194959 states and 201192 transitions. Word has length 534 [2018-10-24 16:25:58,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:25:58,647 INFO L481 AbstractCegarLoop]: Abstraction has 194959 states and 201192 transitions. [2018-10-24 16:25:58,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:25:58,648 INFO L276 IsEmpty]: Start isEmpty. Operand 194959 states and 201192 transitions. [2018-10-24 16:25:58,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2018-10-24 16:25:58,655 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:25:58,655 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:25:58,656 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:25:58,656 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:25:58,656 INFO L82 PathProgramCache]: Analyzing trace with hash -211509236, now seen corresponding path program 1 times [2018-10-24 16:25:58,656 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:25:58,656 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:25:58,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:25:58,657 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:25:58,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:25:58,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:25:59,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1044 backedges. 482 proven. 0 refuted. 0 times theorem prover too weak. 562 trivial. 0 not checked. [2018-10-24 16:25:59,864 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:25:59,864 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:25:59,865 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:25:59,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:25:59,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:25:59,866 INFO L87 Difference]: Start difference. First operand 194959 states and 201192 transitions. Second operand 4 states. Received shutdown request... [2018-10-24 16:26:00,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:26:00,667 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 16:26:00,673 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 16:26:00,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 04:26:00 BoogieIcfgContainer [2018-10-24 16:26:00,673 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 16:26:00,674 INFO L168 Benchmark]: Toolchain (without parser) took 228017.03 ms. Allocated memory was 1.5 GB in the beginning and 4.5 GB in the end (delta: 2.9 GB). Free memory was 1.4 GB in the beginning and 2.7 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. [2018-10-24 16:26:00,676 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 16:26:00,676 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2674.35 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 256.3 MB). Peak memory consumption was 256.3 MB. Max. memory is 7.1 GB. [2018-10-24 16:26:00,677 INFO L168 Benchmark]: Boogie Procedure Inliner took 907.62 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 807.9 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -999.7 MB). Peak memory consumption was 73.0 MB. Max. memory is 7.1 GB. [2018-10-24 16:26:00,678 INFO L168 Benchmark]: Boogie Preprocessor took 537.66 ms. Allocated memory is still 2.4 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 53.5 MB). Peak memory consumption was 53.5 MB. Max. memory is 7.1 GB. [2018-10-24 16:26:00,679 INFO L168 Benchmark]: RCFGBuilder took 15823.88 ms. Allocated memory was 2.4 GB in the beginning and 2.6 GB in the end (delta: 288.4 MB). Free memory was 2.1 GB in the beginning and 2.2 GB in the end (delta: -54.5 MB). Peak memory consumption was 655.8 MB. Max. memory is 7.1 GB. [2018-10-24 16:26:00,680 INFO L168 Benchmark]: TraceAbstraction took 208067.45 ms. Allocated memory was 2.6 GB in the beginning and 4.5 GB in the end (delta: 1.8 GB). Free memory was 2.2 GB in the beginning and 2.7 GB in the end (delta: -488.6 MB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. [2018-10-24 16:26:00,685 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 2674.35 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 256.3 MB). Peak memory consumption was 256.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 907.62 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 807.9 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -999.7 MB). Peak memory consumption was 73.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 537.66 ms. Allocated memory is still 2.4 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 53.5 MB). Peak memory consumption was 53.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 15823.88 ms. Allocated memory was 2.4 GB in the beginning and 2.6 GB in the end (delta: 288.4 MB). Free memory was 2.1 GB in the beginning and 2.2 GB in the end (delta: -54.5 MB). Peak memory consumption was 655.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 208067.45 ms. Allocated memory was 2.6 GB in the beginning and 4.5 GB in the end (delta: 1.8 GB). Free memory was 2.2 GB in the beginning and 2.7 GB in the end (delta: -488.6 MB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 147]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 147). Cancelled while BasicCegarLoop was constructing difference of abstraction (194959states) and FLOYD_HOARE automaton (currently 3 states, 4 states before enhancement),while ReachableStatesComputation was computing reachable states (616 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 1099 locations, 1 error locations. TIMEOUT Result, 207.9s OverallTime, 15 OverallIterations, 6 TraceHistogramMax, 172.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 9825 SDtfs, 32948 SDslu, 3338 SDs, 0 SdLazy, 67211 SolverSat, 16610 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 136.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 786 GetRequests, 741 SyntacticMatches, 10 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 3.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=219454occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 26.3s AutomataMinimizationTime, 14 MinimizatonAttempts, 59645 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 5.2s InterpolantComputationTime, 6109 NumberOfCodeBlocks, 6109 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 6091 ConstructedInterpolants, 0 QuantifiedInterpolants, 5173386 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1004 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 18 InterpolantComputations, 15 PerfectInterpolantSequences, 8831/8905 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown