java -Xmx8000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBpl.xml --generate-csv --csv-dir csv -s ../../../trunk/examples/programs/regression/bpl/AutomizerBpl-nestedInterpolants.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_k.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-56c9370 [2018-07-23 15:23:27,849 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-23 15:23:27,851 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-23 15:23:27,863 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-23 15:23:27,864 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-23 15:23:27,865 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-23 15:23:27,866 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-23 15:23:27,868 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-23 15:23:27,870 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-23 15:23:27,870 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-23 15:23:27,871 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-07-23 15:23:27,887 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-23 15:23:27,887 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-23 15:23:27,888 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-23 15:23:27,889 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-23 15:23:27,890 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-23 15:23:27,891 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-23 15:23:27,892 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-23 15:23:27,892 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-23 15:23:27,893 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-07-23 15:23:27,895 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/regression/bpl/AutomizerBpl-nestedInterpolants.epf [2018-07-23 15:23:27,909 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-23 15:23:27,909 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-23 15:23:27,912 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-23 15:23:27,913 INFO L133 SettingsManager]: * SMT solver=Internal_SMTInterpol [2018-07-23 15:23:27,913 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-23 15:23:27,913 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2018-07-23 15:23:27,913 INFO L133 SettingsManager]: * Use separate solver for trace checks=false [2018-07-23 15:23:27,915 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-23 15:23:27,993 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-23 15:23:28,009 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-23 15:23:28,017 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-23 15:23:28,019 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-07-23 15:23:28,020 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-07-23 15:23:28,021 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_k.i_3.bpl [2018-07-23 15:23:28,021 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_k.i_3.bpl' [2018-07-23 15:23:28,070 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-23 15:23:28,071 INFO L131 ToolchainWalker]: Walking toolchain with 3 elements. [2018-07-23 15:23:28,072 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-23 15:23:28,072 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-23 15:23:28,072 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-23 15:23:28,101 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:23:28" (1/1) ... [2018-07-23 15:23:28,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:23:28" (1/1) ... [2018-07-23 15:23:28,113 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:23:28" (1/1) ... [2018-07-23 15:23:28,114 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:23:28" (1/1) ... [2018-07-23 15:23:28,117 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:23:28" (1/1) ... [2018-07-23 15:23:28,119 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:23:28" (1/1) ... [2018-07-23 15:23:28,120 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:23:28" (1/1) ... [2018-07-23 15:23:28,122 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-23 15:23:28,123 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-23 15:23:28,123 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-23 15:23:28,123 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-23 15:23:28,125 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:23:28" (1/1) ... [2018-07-23 15:23:28,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-23 15:23:28,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-23 15:23:28,389 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-23 15:23:28,389 INFO L202 PluginConnector]: Adding new model count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 03:23:28 BoogieIcfgContainer [2018-07-23 15:23:28,390 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-23 15:23:28,391 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-23 15:23:28,391 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-23 15:23:28,395 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-23 15:23:28,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:23:28" (1/2) ... [2018-07-23 15:23:28,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1508bf6e and model type count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 03:23:28, skipping insertion in model container [2018-07-23 15:23:28,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 03:23:28" (2/2) ... [2018-07-23 15:23:28,399 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_k.i_3.bpl [2018-07-23 15:23:28,409 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2018-07-23 15:23:28,418 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-23 15:23:28,465 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-23 15:23:28,466 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-23 15:23:28,467 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-23 15:23:28,467 INFO L375 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2018-07-23 15:23:28,467 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-23 15:23:28,467 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-23 15:23:28,468 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-23 15:23:28,468 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-23 15:23:28,468 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-23 15:23:28,483 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-07-23 15:23:28,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-07-23 15:23:28,492 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:28,493 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-07-23 15:23:28,494 INFO L414 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:28,499 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-07-23 15:23:28,506 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:28,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:28,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:28,597 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 15:23:28,597 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-07-23 15:23:28,602 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-23 15:23:28,616 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-23 15:23:28,616 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-23 15:23:28,619 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-07-23 15:23:28,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:28,646 INFO L93 Difference]: Finished difference Result 10 states and 11 transitions. [2018-07-23 15:23:28,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-23 15:23:28,648 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-07-23 15:23:28,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:28,659 INFO L225 Difference]: With dead ends: 10 [2018-07-23 15:23:28,660 INFO L226 Difference]: Without dead ends: 7 [2018-07-23 15:23:28,663 INFO L573 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 [2018-07-23 15:23:28,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-07-23 15:23:28,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-07-23 15:23:28,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-07-23 15:23:28,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-07-23 15:23:28,701 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-07-23 15:23:28,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:28,702 INFO L471 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-07-23 15:23:28,702 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-23 15:23:28,702 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-07-23 15:23:28,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-07-23 15:23:28,703 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:28,703 INFO L353 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-07-23 15:23:28,703 INFO L414 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:28,704 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-07-23 15:23:28,704 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:28,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:28,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:28,737 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:28,737 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2018-07-23 15:23:28,739 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-23 15:23:28,740 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-23 15:23:28,740 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-07-23 15:23:28,740 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-07-23 15:23:28,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:28,758 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-07-23 15:23:28,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-23 15:23:28,759 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-07-23 15:23:28,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:28,760 INFO L225 Difference]: With dead ends: 11 [2018-07-23 15:23:28,760 INFO L226 Difference]: Without dead ends: 9 [2018-07-23 15:23:28,762 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-07-23 15:23:28,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-07-23 15:23:28,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-07-23 15:23:28,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-07-23 15:23:28,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-07-23 15:23:28,766 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-07-23 15:23:28,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:28,767 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-07-23 15:23:28,767 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-23 15:23:28,767 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-07-23 15:23:28,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-07-23 15:23:28,768 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:28,768 INFO L353 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-07-23 15:23:28,768 INFO L414 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:28,769 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-07-23 15:23:28,769 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:28,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:28,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:28,809 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:28,809 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-07-23 15:23:28,810 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-23 15:23:28,810 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-23 15:23:28,810 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-07-23 15:23:28,811 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-07-23 15:23:28,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:28,859 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-07-23 15:23:28,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-23 15:23:28,860 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-07-23 15:23:28,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:28,861 INFO L225 Difference]: With dead ends: 13 [2018-07-23 15:23:28,861 INFO L226 Difference]: Without dead ends: 11 [2018-07-23 15:23:28,862 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-07-23 15:23:28,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-07-23 15:23:28,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-07-23 15:23:28,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-07-23 15:23:28,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-07-23 15:23:28,867 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-07-23 15:23:28,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:28,867 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-07-23 15:23:28,868 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-23 15:23:28,868 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-07-23 15:23:28,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-07-23 15:23:28,868 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:28,869 INFO L353 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-07-23 15:23:28,869 INFO L414 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:28,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-07-23 15:23:28,869 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:28,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:28,916 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:28,916 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:28,917 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-07-23 15:23:28,917 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-23 15:23:28,917 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-23 15:23:28,918 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-07-23 15:23:28,918 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-07-23 15:23:29,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:29,007 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-07-23 15:23:29,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-23 15:23:29,008 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-07-23 15:23:29,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:29,009 INFO L225 Difference]: With dead ends: 15 [2018-07-23 15:23:29,009 INFO L226 Difference]: Without dead ends: 13 [2018-07-23 15:23:29,010 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-07-23 15:23:29,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-07-23 15:23:29,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-07-23 15:23:29,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-07-23 15:23:29,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-07-23 15:23:29,025 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-07-23 15:23:29,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:29,026 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-07-23 15:23:29,026 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-23 15:23:29,026 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-07-23 15:23:29,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-07-23 15:23:29,027 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:29,027 INFO L353 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-07-23 15:23:29,030 INFO L414 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:29,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-07-23 15:23:29,031 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:29,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:29,104 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:29,104 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:29,105 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-07-23 15:23:29,105 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-23 15:23:29,105 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-23 15:23:29,106 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-07-23 15:23:29,106 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-07-23 15:23:29,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:29,209 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-07-23 15:23:29,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-23 15:23:29,210 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-07-23 15:23:29,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:29,211 INFO L225 Difference]: With dead ends: 17 [2018-07-23 15:23:29,211 INFO L226 Difference]: Without dead ends: 15 [2018-07-23 15:23:29,212 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-07-23 15:23:29,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-07-23 15:23:29,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-07-23 15:23:29,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-07-23 15:23:29,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-07-23 15:23:29,221 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-07-23 15:23:29,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:29,222 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-07-23 15:23:29,222 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-23 15:23:29,222 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-07-23 15:23:29,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-07-23 15:23:29,223 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:29,223 INFO L353 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-07-23 15:23:29,223 INFO L414 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:29,226 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-07-23 15:23:29,226 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:29,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:29,308 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:29,311 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:29,311 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-07-23 15:23:29,311 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-23 15:23:29,312 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-23 15:23:29,312 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-07-23 15:23:29,313 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-07-23 15:23:29,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:29,431 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-07-23 15:23:29,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-23 15:23:29,431 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-07-23 15:23:29,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:29,432 INFO L225 Difference]: With dead ends: 19 [2018-07-23 15:23:29,433 INFO L226 Difference]: Without dead ends: 17 [2018-07-23 15:23:29,433 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2018-07-23 15:23:29,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-07-23 15:23:29,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-07-23 15:23:29,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-07-23 15:23:29,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-07-23 15:23:29,440 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-07-23 15:23:29,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:29,441 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-07-23 15:23:29,441 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-23 15:23:29,441 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-07-23 15:23:29,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-07-23 15:23:29,442 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:29,442 INFO L353 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-07-23 15:23:29,442 INFO L414 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:29,443 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-07-23 15:23:29,443 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:29,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:29,487 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:29,488 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:29,488 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2018-07-23 15:23:29,488 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-23 15:23:29,489 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-23 15:23:29,489 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-07-23 15:23:29,490 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-07-23 15:23:29,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:29,639 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-07-23 15:23:29,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-23 15:23:29,640 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-07-23 15:23:29,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:29,641 INFO L225 Difference]: With dead ends: 21 [2018-07-23 15:23:29,641 INFO L226 Difference]: Without dead ends: 19 [2018-07-23 15:23:29,642 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2018-07-23 15:23:29,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-07-23 15:23:29,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-07-23 15:23:29,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-07-23 15:23:29,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-07-23 15:23:29,653 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-07-23 15:23:29,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:29,656 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-07-23 15:23:29,657 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-23 15:23:29,657 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-07-23 15:23:29,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-07-23 15:23:29,658 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:29,658 INFO L353 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-07-23 15:23:29,658 INFO L414 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:29,658 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-07-23 15:23:29,659 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:29,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:29,739 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:29,740 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:29,740 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-07-23 15:23:29,741 INFO L450 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-23 15:23:29,742 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-23 15:23:29,742 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-07-23 15:23:29,742 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-07-23 15:23:29,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:29,871 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-07-23 15:23:29,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-23 15:23:29,871 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-07-23 15:23:29,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:29,874 INFO L225 Difference]: With dead ends: 23 [2018-07-23 15:23:29,874 INFO L226 Difference]: Without dead ends: 21 [2018-07-23 15:23:29,875 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2018-07-23 15:23:29,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-07-23 15:23:29,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-07-23 15:23:29,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-07-23 15:23:29,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-07-23 15:23:29,883 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-07-23 15:23:29,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:29,884 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-07-23 15:23:29,884 INFO L472 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-23 15:23:29,884 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-07-23 15:23:29,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-07-23 15:23:29,886 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:29,887 INFO L353 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-07-23 15:23:29,887 INFO L414 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:29,888 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-07-23 15:23:29,888 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:29,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:29,951 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:29,952 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:29,952 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2018-07-23 15:23:29,953 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-23 15:23:29,953 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-23 15:23:29,953 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-07-23 15:23:29,954 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-07-23 15:23:30,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:30,062 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-07-23 15:23:30,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-23 15:23:30,062 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-07-23 15:23:30,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:30,063 INFO L225 Difference]: With dead ends: 25 [2018-07-23 15:23:30,063 INFO L226 Difference]: Without dead ends: 23 [2018-07-23 15:23:30,065 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2018-07-23 15:23:30,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-07-23 15:23:30,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-07-23 15:23:30,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-07-23 15:23:30,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-07-23 15:23:30,074 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-07-23 15:23:30,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:30,076 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-07-23 15:23:30,077 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-23 15:23:30,077 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-07-23 15:23:30,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-07-23 15:23:30,078 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:30,078 INFO L353 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-07-23 15:23:30,078 INFO L414 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:30,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-07-23 15:23:30,079 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:30,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:30,136 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:30,136 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:30,136 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-07-23 15:23:30,137 INFO L450 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-07-23 15:23:30,137 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-07-23 15:23:30,139 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-07-23 15:23:30,140 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2018-07-23 15:23:30,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:30,275 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-07-23 15:23:30,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-23 15:23:30,275 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-07-23 15:23:30,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:30,276 INFO L225 Difference]: With dead ends: 27 [2018-07-23 15:23:30,276 INFO L226 Difference]: Without dead ends: 25 [2018-07-23 15:23:30,277 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2018-07-23 15:23:30,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-07-23 15:23:30,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-07-23 15:23:30,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-07-23 15:23:30,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-07-23 15:23:30,288 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-07-23 15:23:30,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:30,289 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-07-23 15:23:30,289 INFO L472 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-07-23 15:23:30,289 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-07-23 15:23:30,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-07-23 15:23:30,290 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:30,290 INFO L353 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-07-23 15:23:30,291 INFO L414 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:30,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1724181365, now seen corresponding path program 10 times [2018-07-23 15:23:30,292 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:30,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:30,367 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:30,368 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:30,368 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2018-07-23 15:23:30,369 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-23 15:23:30,369 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-23 15:23:30,370 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-07-23 15:23:30,370 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2018-07-23 15:23:30,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:30,528 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-07-23 15:23:30,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-07-23 15:23:30,529 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-07-23 15:23:30,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:30,530 INFO L225 Difference]: With dead ends: 29 [2018-07-23 15:23:30,530 INFO L226 Difference]: Without dead ends: 27 [2018-07-23 15:23:30,532 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2018-07-23 15:23:30,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-07-23 15:23:30,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-07-23 15:23:30,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-07-23 15:23:30,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-07-23 15:23:30,540 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-07-23 15:23:30,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:30,541 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-07-23 15:23:30,541 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-23 15:23:30,543 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-07-23 15:23:30,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-07-23 15:23:30,544 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:30,544 INFO L353 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-07-23 15:23:30,545 INFO L414 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:30,545 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 11 times [2018-07-23 15:23:30,545 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:30,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:30,617 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:30,617 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:30,617 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-07-23 15:23:30,618 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-23 15:23:30,618 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-23 15:23:30,618 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-07-23 15:23:30,619 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2018-07-23 15:23:30,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:30,776 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-07-23 15:23:30,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-07-23 15:23:30,776 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-07-23 15:23:30,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:30,777 INFO L225 Difference]: With dead ends: 31 [2018-07-23 15:23:30,777 INFO L226 Difference]: Without dead ends: 29 [2018-07-23 15:23:30,778 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2018-07-23 15:23:30,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-07-23 15:23:30,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-07-23 15:23:30,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-07-23 15:23:30,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-07-23 15:23:30,792 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-07-23 15:23:30,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:30,793 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-07-23 15:23:30,793 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-23 15:23:30,793 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-07-23 15:23:30,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-07-23 15:23:30,794 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:30,794 INFO L353 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-07-23 15:23:30,795 INFO L414 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:30,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1472956545, now seen corresponding path program 12 times [2018-07-23 15:23:30,795 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:30,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:30,884 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:30,885 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:30,885 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2018-07-23 15:23:30,886 INFO L450 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-07-23 15:23:30,886 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-07-23 15:23:30,886 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-07-23 15:23:30,887 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-07-23 15:23:31,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:31,068 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-07-23 15:23:31,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-23 15:23:31,069 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-07-23 15:23:31,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:31,069 INFO L225 Difference]: With dead ends: 33 [2018-07-23 15:23:31,070 INFO L226 Difference]: Without dead ends: 31 [2018-07-23 15:23:31,072 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2018-07-23 15:23:31,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-07-23 15:23:31,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-07-23 15:23:31,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-07-23 15:23:31,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-07-23 15:23:31,080 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-07-23 15:23:31,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:31,080 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-07-23 15:23:31,082 INFO L472 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-07-23 15:23:31,083 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-07-23 15:23:31,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-07-23 15:23:31,083 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:31,084 INFO L353 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-07-23 15:23:31,084 INFO L414 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:31,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 13 times [2018-07-23 15:23:31,084 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:31,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:31,178 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:31,178 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:31,179 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-07-23 15:23:31,179 INFO L450 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-07-23 15:23:31,179 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-07-23 15:23:31,180 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-07-23 15:23:31,180 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2018-07-23 15:23:31,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:31,400 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-07-23 15:23:31,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-07-23 15:23:31,400 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-07-23 15:23:31,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:31,407 INFO L225 Difference]: With dead ends: 35 [2018-07-23 15:23:31,407 INFO L226 Difference]: Without dead ends: 33 [2018-07-23 15:23:31,408 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2018-07-23 15:23:31,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-07-23 15:23:31,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-07-23 15:23:31,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-07-23 15:23:31,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-07-23 15:23:31,421 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-07-23 15:23:31,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:31,421 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-07-23 15:23:31,421 INFO L472 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-07-23 15:23:31,422 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-07-23 15:23:31,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-07-23 15:23:31,424 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:31,425 INFO L353 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-07-23 15:23:31,425 INFO L414 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:31,425 INFO L82 PathProgramCache]: Analyzing trace with hash 85672051, now seen corresponding path program 14 times [2018-07-23 15:23:31,426 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:31,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:31,534 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:31,535 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:31,535 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2018-07-23 15:23:31,535 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-23 15:23:31,536 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-23 15:23:31,536 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-07-23 15:23:31,537 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2018-07-23 15:23:31,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:31,791 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-07-23 15:23:31,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-07-23 15:23:31,792 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-07-23 15:23:31,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:31,793 INFO L225 Difference]: With dead ends: 37 [2018-07-23 15:23:31,793 INFO L226 Difference]: Without dead ends: 35 [2018-07-23 15:23:31,796 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2018-07-23 15:23:31,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-07-23 15:23:31,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-07-23 15:23:31,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-07-23 15:23:31,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-07-23 15:23:31,805 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-07-23 15:23:31,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:31,806 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-07-23 15:23:31,806 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-23 15:23:31,806 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-07-23 15:23:31,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-07-23 15:23:31,807 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:31,812 INFO L353 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-07-23 15:23:31,813 INFO L414 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:31,813 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 15 times [2018-07-23 15:23:31,813 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:31,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:31,934 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:31,934 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:31,934 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-07-23 15:23:31,935 INFO L450 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-07-23 15:23:31,937 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-07-23 15:23:31,938 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-07-23 15:23:31,938 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2018-07-23 15:23:32,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:32,270 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-07-23 15:23:32,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-07-23 15:23:32,271 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-07-23 15:23:32,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:32,274 INFO L225 Difference]: With dead ends: 39 [2018-07-23 15:23:32,274 INFO L226 Difference]: Without dead ends: 37 [2018-07-23 15:23:32,275 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=288, Invalid=768, Unknown=0, NotChecked=0, Total=1056 [2018-07-23 15:23:32,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-07-23 15:23:32,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-07-23 15:23:32,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-07-23 15:23:32,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-07-23 15:23:32,287 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-07-23 15:23:32,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:32,288 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-07-23 15:23:32,288 INFO L472 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-07-23 15:23:32,288 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-07-23 15:23:32,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-07-23 15:23:32,289 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:32,289 INFO L353 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1] [2018-07-23 15:23:32,289 INFO L414 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:32,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1899204761, now seen corresponding path program 16 times [2018-07-23 15:23:32,290 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:32,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:32,434 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:32,435 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:32,435 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2018-07-23 15:23:32,435 INFO L450 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-07-23 15:23:32,436 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-07-23 15:23:32,436 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-07-23 15:23:32,436 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2018-07-23 15:23:32,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:32,743 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-07-23 15:23:32,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-07-23 15:23:32,743 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-07-23 15:23:32,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:32,744 INFO L225 Difference]: With dead ends: 41 [2018-07-23 15:23:32,744 INFO L226 Difference]: Without dead ends: 39 [2018-07-23 15:23:32,745 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2018-07-23 15:23:32,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-07-23 15:23:32,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-07-23 15:23:32,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-07-23 15:23:32,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-07-23 15:23:32,759 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-07-23 15:23:32,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:32,760 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-07-23 15:23:32,760 INFO L472 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-07-23 15:23:32,760 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-07-23 15:23:32,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-07-23 15:23:32,761 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:32,761 INFO L353 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-07-23 15:23:32,761 INFO L414 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:32,762 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 17 times [2018-07-23 15:23:32,762 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:32,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:32,869 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:32,869 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:32,869 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2018-07-23 15:23:32,870 INFO L450 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-07-23 15:23:32,870 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-07-23 15:23:32,871 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-07-23 15:23:32,871 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2018-07-23 15:23:33,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:33,194 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-07-23 15:23:33,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-07-23 15:23:33,194 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-07-23 15:23:33,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:33,195 INFO L225 Difference]: With dead ends: 43 [2018-07-23 15:23:33,196 INFO L226 Difference]: Without dead ends: 41 [2018-07-23 15:23:33,198 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2018-07-23 15:23:33,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-07-23 15:23:33,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-07-23 15:23:33,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-07-23 15:23:33,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-07-23 15:23:33,213 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-07-23 15:23:33,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:33,214 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-07-23 15:23:33,214 INFO L472 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-07-23 15:23:33,214 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-07-23 15:23:33,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-07-23 15:23:33,215 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:33,215 INFO L353 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1] [2018-07-23 15:23:33,215 INFO L414 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:33,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1839531099, now seen corresponding path program 18 times [2018-07-23 15:23:33,219 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:33,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:33,355 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:33,356 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:33,356 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-07-23 15:23:33,357 INFO L450 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-07-23 15:23:33,357 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-07-23 15:23:33,357 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-07-23 15:23:33,359 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2018-07-23 15:23:33,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:33,675 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-07-23 15:23:33,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-07-23 15:23:33,676 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-07-23 15:23:33,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:33,677 INFO L225 Difference]: With dead ends: 45 [2018-07-23 15:23:33,677 INFO L226 Difference]: Without dead ends: 43 [2018-07-23 15:23:33,680 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2018-07-23 15:23:33,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-07-23 15:23:33,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-07-23 15:23:33,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-07-23 15:23:33,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-07-23 15:23:33,688 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2018-07-23 15:23:33,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:33,689 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-07-23 15:23:33,689 INFO L472 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-07-23 15:23:33,689 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-07-23 15:23:33,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-07-23 15:23:33,690 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:33,690 INFO L353 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1] [2018-07-23 15:23:33,690 INFO L414 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:33,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1737087723, now seen corresponding path program 19 times [2018-07-23 15:23:33,692 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:33,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:33,836 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:33,836 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:33,836 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2018-07-23 15:23:33,837 INFO L450 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-07-23 15:23:33,837 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-07-23 15:23:33,837 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-07-23 15:23:33,838 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2018-07-23 15:23:34,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:34,198 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-07-23 15:23:34,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-07-23 15:23:34,199 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-07-23 15:23:34,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:34,200 INFO L225 Difference]: With dead ends: 47 [2018-07-23 15:23:34,200 INFO L226 Difference]: Without dead ends: 45 [2018-07-23 15:23:34,201 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2018-07-23 15:23:34,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-07-23 15:23:34,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-07-23 15:23:34,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-07-23 15:23:34,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-07-23 15:23:34,215 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2018-07-23 15:23:34,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:34,216 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-07-23 15:23:34,216 INFO L472 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-07-23 15:23:34,216 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-07-23 15:23:34,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-07-23 15:23:34,216 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:34,216 INFO L353 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1] [2018-07-23 15:23:34,217 INFO L414 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:34,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1401028431, now seen corresponding path program 20 times [2018-07-23 15:23:34,217 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:34,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:34,352 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:34,353 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:34,353 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-07-23 15:23:34,353 INFO L450 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-07-23 15:23:34,354 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-07-23 15:23:34,354 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-07-23 15:23:34,354 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2018-07-23 15:23:34,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:34,803 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-07-23 15:23:34,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-07-23 15:23:34,803 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-07-23 15:23:34,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:34,804 INFO L225 Difference]: With dead ends: 49 [2018-07-23 15:23:34,804 INFO L226 Difference]: Without dead ends: 47 [2018-07-23 15:23:34,805 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2018-07-23 15:23:34,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-07-23 15:23:34,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-07-23 15:23:34,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-07-23 15:23:34,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-07-23 15:23:34,816 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2018-07-23 15:23:34,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:34,817 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-07-23 15:23:34,817 INFO L472 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-07-23 15:23:34,817 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-07-23 15:23:34,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-07-23 15:23:34,818 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:34,818 INFO L353 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1] [2018-07-23 15:23:34,818 INFO L414 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:34,818 INFO L82 PathProgramCache]: Analyzing trace with hash 2063610633, now seen corresponding path program 21 times [2018-07-23 15:23:34,819 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:34,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:34,971 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:34,973 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:34,973 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2018-07-23 15:23:34,973 INFO L450 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-07-23 15:23:34,974 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-07-23 15:23:34,974 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-07-23 15:23:34,974 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2018-07-23 15:23:35,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:35,391 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-07-23 15:23:35,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-07-23 15:23:35,391 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-07-23 15:23:35,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:35,392 INFO L225 Difference]: With dead ends: 51 [2018-07-23 15:23:35,392 INFO L226 Difference]: Without dead ends: 49 [2018-07-23 15:23:35,397 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=1452, Unknown=0, NotChecked=0, Total=1980 [2018-07-23 15:23:35,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-07-23 15:23:35,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-07-23 15:23:35,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-07-23 15:23:35,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-07-23 15:23:35,407 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2018-07-23 15:23:35,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:35,407 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-07-23 15:23:35,408 INFO L472 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-07-23 15:23:35,408 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-07-23 15:23:35,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-07-23 15:23:35,411 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:35,411 INFO L353 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1] [2018-07-23 15:23:35,411 INFO L414 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:35,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1145020349, now seen corresponding path program 22 times [2018-07-23 15:23:35,411 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:35,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:35,557 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:35,558 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:35,558 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-07-23 15:23:35,558 INFO L450 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-07-23 15:23:35,558 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-07-23 15:23:35,559 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-07-23 15:23:35,559 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2018-07-23 15:23:36,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:36,022 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-07-23 15:23:36,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-07-23 15:23:36,022 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-07-23 15:23:36,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:36,023 INFO L225 Difference]: With dead ends: 53 [2018-07-23 15:23:36,023 INFO L226 Difference]: Without dead ends: 51 [2018-07-23 15:23:36,025 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=575, Invalid=1587, Unknown=0, NotChecked=0, Total=2162 [2018-07-23 15:23:36,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-07-23 15:23:36,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-07-23 15:23:36,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-07-23 15:23:36,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-07-23 15:23:36,046 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2018-07-23 15:23:36,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:36,046 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-07-23 15:23:36,046 INFO L472 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-07-23 15:23:36,046 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-07-23 15:23:36,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-07-23 15:23:36,047 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:36,047 INFO L353 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1] [2018-07-23 15:23:36,047 INFO L414 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:36,047 INFO L82 PathProgramCache]: Analyzing trace with hash -852875523, now seen corresponding path program 23 times [2018-07-23 15:23:36,048 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:36,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:36,233 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:36,234 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:36,234 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2018-07-23 15:23:36,234 INFO L450 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-07-23 15:23:36,234 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-07-23 15:23:36,235 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-07-23 15:23:36,235 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2018-07-23 15:23:36,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:36,742 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-07-23 15:23:36,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-07-23 15:23:36,743 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-07-23 15:23:36,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:36,744 INFO L225 Difference]: With dead ends: 55 [2018-07-23 15:23:36,744 INFO L226 Difference]: Without dead ends: 53 [2018-07-23 15:23:36,745 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2018-07-23 15:23:36,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-07-23 15:23:36,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-07-23 15:23:36,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-07-23 15:23:36,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-07-23 15:23:36,755 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2018-07-23 15:23:36,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:36,755 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-07-23 15:23:36,755 INFO L472 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-07-23 15:23:36,756 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-07-23 15:23:36,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-07-23 15:23:36,756 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:36,756 INFO L353 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1] [2018-07-23 15:23:36,757 INFO L414 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:36,757 INFO L82 PathProgramCache]: Analyzing trace with hash 725428023, now seen corresponding path program 24 times [2018-07-23 15:23:36,757 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:36,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:36,942 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:36,942 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:36,943 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2018-07-23 15:23:36,943 INFO L450 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-07-23 15:23:36,944 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-07-23 15:23:36,944 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-07-23 15:23:36,945 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2018-07-23 15:23:37,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:37,550 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-07-23 15:23:37,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-07-23 15:23:37,550 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-07-23 15:23:37,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:37,551 INFO L225 Difference]: With dead ends: 57 [2018-07-23 15:23:37,551 INFO L226 Difference]: Without dead ends: 55 [2018-07-23 15:23:37,552 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=675, Invalid=1875, Unknown=0, NotChecked=0, Total=2550 [2018-07-23 15:23:37,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-07-23 15:23:37,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-07-23 15:23:37,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-07-23 15:23:37,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-07-23 15:23:37,566 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2018-07-23 15:23:37,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:37,566 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-07-23 15:23:37,566 INFO L472 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-07-23 15:23:37,566 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-07-23 15:23:37,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-07-23 15:23:37,567 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:37,567 INFO L353 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1] [2018-07-23 15:23:37,567 INFO L414 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:37,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1351680241, now seen corresponding path program 25 times [2018-07-23 15:23:37,571 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:37,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:37,742 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:37,742 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:37,742 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2018-07-23 15:23:37,743 INFO L450 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-07-23 15:23:37,743 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-07-23 15:23:37,744 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-07-23 15:23:37,744 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2018-07-23 15:23:38,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:38,280 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-07-23 15:23:38,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-07-23 15:23:38,280 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-07-23 15:23:38,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:38,281 INFO L225 Difference]: With dead ends: 59 [2018-07-23 15:23:38,281 INFO L226 Difference]: Without dead ends: 57 [2018-07-23 15:23:38,283 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=728, Invalid=2028, Unknown=0, NotChecked=0, Total=2756 [2018-07-23 15:23:38,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-07-23 15:23:38,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-07-23 15:23:38,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-07-23 15:23:38,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-07-23 15:23:38,290 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2018-07-23 15:23:38,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:38,290 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-07-23 15:23:38,291 INFO L472 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-07-23 15:23:38,291 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-07-23 15:23:38,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-07-23 15:23:38,291 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:38,291 INFO L353 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1] [2018-07-23 15:23:38,292 INFO L414 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:38,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1884640299, now seen corresponding path program 26 times [2018-07-23 15:23:38,292 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:38,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:38,483 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:38,483 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:38,483 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-07-23 15:23:38,484 INFO L450 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-07-23 15:23:38,484 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-07-23 15:23:38,484 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-07-23 15:23:38,485 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2018-07-23 15:23:39,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:39,114 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-07-23 15:23:39,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-07-23 15:23:39,117 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-07-23 15:23:39,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:39,118 INFO L225 Difference]: With dead ends: 61 [2018-07-23 15:23:39,118 INFO L226 Difference]: Without dead ends: 59 [2018-07-23 15:23:39,120 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=783, Invalid=2187, Unknown=0, NotChecked=0, Total=2970 [2018-07-23 15:23:39,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-07-23 15:23:39,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-07-23 15:23:39,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-07-23 15:23:39,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-07-23 15:23:39,128 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2018-07-23 15:23:39,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:39,129 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-07-23 15:23:39,129 INFO L472 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-07-23 15:23:39,129 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-07-23 15:23:39,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-07-23 15:23:39,130 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:39,130 INFO L353 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1] [2018-07-23 15:23:39,130 INFO L414 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:39,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1336819483, now seen corresponding path program 27 times [2018-07-23 15:23:39,130 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:39,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:39,356 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:39,358 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:39,358 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-07-23 15:23:39,359 INFO L450 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-07-23 15:23:39,359 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-07-23 15:23:39,359 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-07-23 15:23:39,360 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2018-07-23 15:23:40,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:40,093 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-07-23 15:23:40,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-07-23 15:23:40,093 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-07-23 15:23:40,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:40,094 INFO L225 Difference]: With dead ends: 63 [2018-07-23 15:23:40,094 INFO L226 Difference]: Without dead ends: 61 [2018-07-23 15:23:40,096 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=840, Invalid=2352, Unknown=0, NotChecked=0, Total=3192 [2018-07-23 15:23:40,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-07-23 15:23:40,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-07-23 15:23:40,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-07-23 15:23:40,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-07-23 15:23:40,104 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2018-07-23 15:23:40,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:40,104 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-07-23 15:23:40,104 INFO L472 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-07-23 15:23:40,104 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-07-23 15:23:40,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-07-23 15:23:40,105 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:40,105 INFO L353 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1] [2018-07-23 15:23:40,105 INFO L414 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:40,106 INFO L82 PathProgramCache]: Analyzing trace with hash -488249569, now seen corresponding path program 28 times [2018-07-23 15:23:40,106 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:40,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:40,318 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:40,318 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:40,318 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-07-23 15:23:40,319 INFO L450 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-07-23 15:23:40,319 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-07-23 15:23:40,319 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-07-23 15:23:40,320 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2018-07-23 15:23:40,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:40,974 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-07-23 15:23:40,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-07-23 15:23:40,974 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-07-23 15:23:40,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:40,975 INFO L225 Difference]: With dead ends: 65 [2018-07-23 15:23:40,975 INFO L226 Difference]: Without dead ends: 63 [2018-07-23 15:23:40,977 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=899, Invalid=2523, Unknown=0, NotChecked=0, Total=3422 [2018-07-23 15:23:40,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-07-23 15:23:40,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-07-23 15:23:40,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-07-23 15:23:40,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-07-23 15:23:40,988 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2018-07-23 15:23:40,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:40,989 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-07-23 15:23:40,989 INFO L472 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-07-23 15:23:40,989 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-07-23 15:23:40,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-07-23 15:23:40,990 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:40,990 INFO L353 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1] [2018-07-23 15:23:40,990 INFO L414 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:40,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1056348455, now seen corresponding path program 29 times [2018-07-23 15:23:40,990 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:41,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:41,199 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:41,200 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:41,200 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2018-07-23 15:23:41,200 INFO L450 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-07-23 15:23:41,200 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-07-23 15:23:41,201 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-07-23 15:23:41,201 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 32 states. [2018-07-23 15:23:41,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:41,936 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-07-23 15:23:41,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-07-23 15:23:41,937 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-07-23 15:23:41,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:41,938 INFO L225 Difference]: With dead ends: 67 [2018-07-23 15:23:41,938 INFO L226 Difference]: Without dead ends: 65 [2018-07-23 15:23:41,940 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=960, Invalid=2700, Unknown=0, NotChecked=0, Total=3660 [2018-07-23 15:23:41,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-07-23 15:23:41,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-07-23 15:23:41,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-07-23 15:23:41,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-07-23 15:23:41,948 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2018-07-23 15:23:41,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:41,949 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-07-23 15:23:41,949 INFO L472 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-07-23 15:23:41,949 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-07-23 15:23:41,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-07-23 15:23:41,950 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:41,950 INFO L353 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1] [2018-07-23 15:23:41,950 INFO L414 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:41,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1538531309, now seen corresponding path program 30 times [2018-07-23 15:23:41,950 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:42,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:42,175 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:42,176 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:42,176 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-07-23 15:23:42,176 INFO L450 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-07-23 15:23:42,176 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-07-23 15:23:42,177 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-07-23 15:23:42,177 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 33 states. [2018-07-23 15:23:42,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:42,969 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-07-23 15:23:42,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-07-23 15:23:42,969 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-07-23 15:23:42,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:42,970 INFO L225 Difference]: With dead ends: 69 [2018-07-23 15:23:42,970 INFO L226 Difference]: Without dead ends: 67 [2018-07-23 15:23:42,972 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1023, Invalid=2883, Unknown=0, NotChecked=0, Total=3906 [2018-07-23 15:23:42,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-07-23 15:23:42,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-07-23 15:23:42,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-07-23 15:23:42,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-07-23 15:23:42,979 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2018-07-23 15:23:42,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:42,979 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-07-23 15:23:42,979 INFO L472 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-07-23 15:23:42,979 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-07-23 15:23:42,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-07-23 15:23:42,980 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:42,980 INFO L353 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1] [2018-07-23 15:23:42,980 INFO L414 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:42,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1059786035, now seen corresponding path program 31 times [2018-07-23 15:23:42,981 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:43,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:43,192 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:43,193 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:43,193 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2018-07-23 15:23:43,193 INFO L450 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-07-23 15:23:43,194 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-07-23 15:23:43,194 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-07-23 15:23:43,195 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 34 states. [2018-07-23 15:23:44,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:44,012 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-07-23 15:23:44,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-07-23 15:23:44,013 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-07-23 15:23:44,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:44,013 INFO L225 Difference]: With dead ends: 71 [2018-07-23 15:23:44,013 INFO L226 Difference]: Without dead ends: 69 [2018-07-23 15:23:44,016 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1088, Invalid=3072, Unknown=0, NotChecked=0, Total=4160 [2018-07-23 15:23:44,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-07-23 15:23:44,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-07-23 15:23:44,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-07-23 15:23:44,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-07-23 15:23:44,023 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2018-07-23 15:23:44,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:44,024 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-07-23 15:23:44,024 INFO L472 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-07-23 15:23:44,024 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-07-23 15:23:44,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-07-23 15:23:44,025 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:44,025 INFO L353 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1] [2018-07-23 15:23:44,025 INFO L414 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:44,025 INFO L82 PathProgramCache]: Analyzing trace with hash -547078393, now seen corresponding path program 32 times [2018-07-23 15:23:44,025 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:44,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:44,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:44,262 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:44,262 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2018-07-23 15:23:44,262 INFO L450 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-07-23 15:23:44,263 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-07-23 15:23:44,263 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-07-23 15:23:44,264 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 35 states. [2018-07-23 15:23:45,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:45,258 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-07-23 15:23:45,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-07-23 15:23:45,258 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-07-23 15:23:45,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:45,259 INFO L225 Difference]: With dead ends: 73 [2018-07-23 15:23:45,259 INFO L226 Difference]: Without dead ends: 71 [2018-07-23 15:23:45,262 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1155, Invalid=3267, Unknown=0, NotChecked=0, Total=4422 [2018-07-23 15:23:45,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-07-23 15:23:45,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-07-23 15:23:45,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-07-23 15:23:45,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-07-23 15:23:45,270 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2018-07-23 15:23:45,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:45,270 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-07-23 15:23:45,270 INFO L472 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-07-23 15:23:45,270 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-07-23 15:23:45,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-07-23 15:23:45,271 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:45,271 INFO L353 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1] [2018-07-23 15:23:45,271 INFO L414 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:45,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1756273471, now seen corresponding path program 33 times [2018-07-23 15:23:45,272 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:45,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:45,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:45,493 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:45,494 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2018-07-23 15:23:45,494 INFO L450 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-07-23 15:23:45,494 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-07-23 15:23:45,495 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-07-23 15:23:45,495 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 36 states. [2018-07-23 15:23:46,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:46,410 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-07-23 15:23:46,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-07-23 15:23:46,410 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-07-23 15:23:46,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:46,411 INFO L225 Difference]: With dead ends: 75 [2018-07-23 15:23:46,411 INFO L226 Difference]: Without dead ends: 73 [2018-07-23 15:23:46,413 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1224, Invalid=3468, Unknown=0, NotChecked=0, Total=4692 [2018-07-23 15:23:46,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-07-23 15:23:46,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-07-23 15:23:46,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-07-23 15:23:46,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-07-23 15:23:46,422 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2018-07-23 15:23:46,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:46,423 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-07-23 15:23:46,423 INFO L472 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-07-23 15:23:46,423 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-07-23 15:23:46,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-07-23 15:23:46,423 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:46,424 INFO L353 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1] [2018-07-23 15:23:46,424 INFO L414 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:46,424 INFO L82 PathProgramCache]: Analyzing trace with hash 143393787, now seen corresponding path program 34 times [2018-07-23 15:23:46,424 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:46,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:46,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:46,679 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:46,679 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-07-23 15:23:46,679 INFO L450 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-07-23 15:23:46,679 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-07-23 15:23:46,680 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-07-23 15:23:46,680 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 37 states. [2018-07-23 15:23:47,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:47,651 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-07-23 15:23:47,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-07-23 15:23:47,651 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-07-23 15:23:47,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:47,652 INFO L225 Difference]: With dead ends: 77 [2018-07-23 15:23:47,652 INFO L226 Difference]: Without dead ends: 75 [2018-07-23 15:23:47,653 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1295, Invalid=3675, Unknown=0, NotChecked=0, Total=4970 [2018-07-23 15:23:47,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-07-23 15:23:47,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-07-23 15:23:47,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-07-23 15:23:47,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-07-23 15:23:47,661 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2018-07-23 15:23:47,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:47,662 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-07-23 15:23:47,662 INFO L472 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-07-23 15:23:47,662 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-07-23 15:23:47,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-07-23 15:23:47,662 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:47,663 INFO L353 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1] [2018-07-23 15:23:47,663 INFO L414 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:47,663 INFO L82 PathProgramCache]: Analyzing trace with hash 362527925, now seen corresponding path program 35 times [2018-07-23 15:23:47,663 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:47,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:47,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:47,918 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:47,918 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2018-07-23 15:23:47,919 INFO L450 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-07-23 15:23:47,919 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-07-23 15:23:47,919 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-07-23 15:23:47,920 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 38 states. [2018-07-23 15:23:48,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:48,926 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-07-23 15:23:48,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-07-23 15:23:48,927 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-07-23 15:23:48,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:48,927 INFO L225 Difference]: With dead ends: 79 [2018-07-23 15:23:48,928 INFO L226 Difference]: Without dead ends: 77 [2018-07-23 15:23:48,929 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1368, Invalid=3888, Unknown=0, NotChecked=0, Total=5256 [2018-07-23 15:23:48,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-07-23 15:23:48,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-07-23 15:23:48,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-07-23 15:23:48,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-07-23 15:23:48,936 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2018-07-23 15:23:48,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:48,937 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-07-23 15:23:48,937 INFO L472 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-07-23 15:23:48,937 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-07-23 15:23:48,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-07-23 15:23:48,938 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:48,938 INFO L353 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1] [2018-07-23 15:23:48,938 INFO L414 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:48,939 INFO L82 PathProgramCache]: Analyzing trace with hash 497037039, now seen corresponding path program 36 times [2018-07-23 15:23:48,939 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:49,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:49,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:49,199 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:49,199 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-07-23 15:23:49,200 INFO L450 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-07-23 15:23:49,200 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-07-23 15:23:49,200 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-07-23 15:23:49,200 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 39 states. [2018-07-23 15:23:50,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:50,364 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-07-23 15:23:50,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-07-23 15:23:50,364 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-07-23 15:23:50,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:50,365 INFO L225 Difference]: With dead ends: 81 [2018-07-23 15:23:50,365 INFO L226 Difference]: Without dead ends: 79 [2018-07-23 15:23:50,366 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1443, Invalid=4107, Unknown=0, NotChecked=0, Total=5550 [2018-07-23 15:23:50,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-07-23 15:23:50,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-07-23 15:23:50,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-07-23 15:23:50,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-07-23 15:23:50,372 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2018-07-23 15:23:50,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:50,373 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-07-23 15:23:50,373 INFO L472 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-07-23 15:23:50,373 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-07-23 15:23:50,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-07-23 15:23:50,374 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:50,374 INFO L353 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1] [2018-07-23 15:23:50,374 INFO L414 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:50,376 INFO L82 PathProgramCache]: Analyzing trace with hash 911276713, now seen corresponding path program 37 times [2018-07-23 15:23:50,376 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:50,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:50,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:50,647 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:50,647 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2018-07-23 15:23:50,648 INFO L450 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-07-23 15:23:50,648 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-07-23 15:23:50,648 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-07-23 15:23:50,649 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 40 states. [2018-07-23 15:23:51,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:51,791 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-07-23 15:23:51,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-07-23 15:23:51,792 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-07-23 15:23:51,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:51,793 INFO L225 Difference]: With dead ends: 83 [2018-07-23 15:23:51,793 INFO L226 Difference]: Without dead ends: 81 [2018-07-23 15:23:51,794 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1520, Invalid=4332, Unknown=0, NotChecked=0, Total=5852 [2018-07-23 15:23:51,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-07-23 15:23:51,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-07-23 15:23:51,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-07-23 15:23:51,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-07-23 15:23:51,803 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2018-07-23 15:23:51,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:51,804 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-07-23 15:23:51,804 INFO L472 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-07-23 15:23:51,804 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-07-23 15:23:51,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-07-23 15:23:51,805 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:51,805 INFO L353 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1] [2018-07-23 15:23:51,805 INFO L414 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:51,806 INFO L82 PathProgramCache]: Analyzing trace with hash -436355101, now seen corresponding path program 38 times [2018-07-23 15:23:51,806 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:51,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:52,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:52,098 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:52,098 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-07-23 15:23:52,099 INFO L450 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-07-23 15:23:52,099 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-07-23 15:23:52,099 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-07-23 15:23:52,100 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 41 states. [2018-07-23 15:23:53,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:53,315 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-07-23 15:23:53,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-07-23 15:23:53,315 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-07-23 15:23:53,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:53,316 INFO L225 Difference]: With dead ends: 85 [2018-07-23 15:23:53,316 INFO L226 Difference]: Without dead ends: 83 [2018-07-23 15:23:53,317 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1599, Invalid=4563, Unknown=0, NotChecked=0, Total=6162 [2018-07-23 15:23:53,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-07-23 15:23:53,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-07-23 15:23:53,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-07-23 15:23:53,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-07-23 15:23:53,325 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2018-07-23 15:23:53,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:53,326 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-07-23 15:23:53,326 INFO L472 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-07-23 15:23:53,326 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-07-23 15:23:53,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-07-23 15:23:53,327 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:53,327 INFO L353 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1] [2018-07-23 15:23:53,327 INFO L414 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:53,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1569595037, now seen corresponding path program 39 times [2018-07-23 15:23:53,327 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:53,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:53,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:53,594 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:53,594 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-07-23 15:23:53,594 INFO L450 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-07-23 15:23:53,595 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-07-23 15:23:53,595 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-07-23 15:23:53,595 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 42 states. [2018-07-23 15:23:54,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:54,798 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-07-23 15:23:54,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-07-23 15:23:54,799 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-07-23 15:23:54,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:54,800 INFO L225 Difference]: With dead ends: 87 [2018-07-23 15:23:54,800 INFO L226 Difference]: Without dead ends: 85 [2018-07-23 15:23:54,802 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1680, Invalid=4800, Unknown=0, NotChecked=0, Total=6480 [2018-07-23 15:23:54,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-07-23 15:23:54,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-07-23 15:23:54,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-07-23 15:23:54,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-07-23 15:23:54,809 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2018-07-23 15:23:54,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:54,809 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-07-23 15:23:54,809 INFO L472 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-07-23 15:23:54,809 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-07-23 15:23:54,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-07-23 15:23:54,810 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:54,810 INFO L353 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1] [2018-07-23 15:23:54,810 INFO L414 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:54,811 INFO L82 PathProgramCache]: Analyzing trace with hash 847361751, now seen corresponding path program 40 times [2018-07-23 15:23:54,811 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:54,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:55,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:55,104 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:55,104 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-07-23 15:23:55,104 INFO L450 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-07-23 15:23:55,105 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-07-23 15:23:55,105 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-07-23 15:23:55,106 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 43 states. [2018-07-23 15:23:56,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:56,544 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-07-23 15:23:56,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-07-23 15:23:56,544 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-07-23 15:23:56,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:56,545 INFO L225 Difference]: With dead ends: 89 [2018-07-23 15:23:56,545 INFO L226 Difference]: Without dead ends: 87 [2018-07-23 15:23:56,546 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1763, Invalid=5043, Unknown=0, NotChecked=0, Total=6806 [2018-07-23 15:23:56,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-07-23 15:23:56,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-07-23 15:23:56,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-07-23 15:23:56,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-07-23 15:23:56,556 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2018-07-23 15:23:56,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:56,557 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-07-23 15:23:56,557 INFO L472 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-07-23 15:23:56,557 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-07-23 15:23:56,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-07-23 15:23:56,558 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:56,558 INFO L353 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1] [2018-07-23 15:23:56,558 INFO L414 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:56,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1729091439, now seen corresponding path program 41 times [2018-07-23 15:23:56,558 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:56,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:56,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:56,852 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:56,852 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2018-07-23 15:23:56,852 INFO L450 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-07-23 15:23:56,852 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-07-23 15:23:56,853 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-07-23 15:23:56,853 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 44 states. [2018-07-23 15:23:58,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:58,025 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-07-23 15:23:58,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-07-23 15:23:58,025 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-07-23 15:23:58,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:58,026 INFO L225 Difference]: With dead ends: 91 [2018-07-23 15:23:58,026 INFO L226 Difference]: Without dead ends: 89 [2018-07-23 15:23:58,028 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1848, Invalid=5292, Unknown=0, NotChecked=0, Total=7140 [2018-07-23 15:23:58,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-07-23 15:23:58,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-07-23 15:23:58,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-07-23 15:23:58,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-07-23 15:23:58,035 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2018-07-23 15:23:58,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:58,036 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-07-23 15:23:58,036 INFO L472 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-07-23 15:23:58,036 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-07-23 15:23:58,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-07-23 15:23:58,037 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:58,037 INFO L353 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1] [2018-07-23 15:23:58,037 INFO L414 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:58,038 INFO L82 PathProgramCache]: Analyzing trace with hash 495522763, now seen corresponding path program 42 times [2018-07-23 15:23:58,038 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:58,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:58,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:58,337 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:58,337 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-07-23 15:23:58,337 INFO L450 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-07-23 15:23:58,338 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-07-23 15:23:58,338 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-07-23 15:23:58,339 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 45 states. [2018-07-23 15:23:59,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:23:59,410 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-07-23 15:23:59,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-07-23 15:23:59,410 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-07-23 15:23:59,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:23:59,411 INFO L225 Difference]: With dead ends: 93 [2018-07-23 15:23:59,411 INFO L226 Difference]: Without dead ends: 91 [2018-07-23 15:23:59,414 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1935, Invalid=5547, Unknown=0, NotChecked=0, Total=7482 [2018-07-23 15:23:59,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-07-23 15:23:59,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-07-23 15:23:59,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-07-23 15:23:59,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-07-23 15:23:59,421 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2018-07-23 15:23:59,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:23:59,421 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-07-23 15:23:59,421 INFO L472 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-07-23 15:23:59,422 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-07-23 15:23:59,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-07-23 15:23:59,422 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:23:59,423 INFO L353 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1] [2018-07-23 15:23:59,423 INFO L414 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:23:59,423 INFO L82 PathProgramCache]: Analyzing trace with hash -543942523, now seen corresponding path program 43 times [2018-07-23 15:23:59,423 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:23:59,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:23:59,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:23:59,686 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:23:59,686 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2018-07-23 15:23:59,687 INFO L450 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-07-23 15:23:59,687 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-07-23 15:23:59,687 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-07-23 15:23:59,688 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 46 states. [2018-07-23 15:24:00,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:00,826 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-07-23 15:24:00,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-07-23 15:24:00,826 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-07-23 15:24:00,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:00,827 INFO L225 Difference]: With dead ends: 95 [2018-07-23 15:24:00,827 INFO L226 Difference]: Without dead ends: 93 [2018-07-23 15:24:00,828 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2024, Invalid=5808, Unknown=0, NotChecked=0, Total=7832 [2018-07-23 15:24:00,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-07-23 15:24:00,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-07-23 15:24:00,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-07-23 15:24:00,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-07-23 15:24:00,837 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2018-07-23 15:24:00,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:00,838 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-07-23 15:24:00,838 INFO L472 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-07-23 15:24:00,838 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-07-23 15:24:00,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-07-23 15:24:00,839 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:00,839 INFO L353 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1] [2018-07-23 15:24:00,839 INFO L414 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:00,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1257297599, now seen corresponding path program 44 times [2018-07-23 15:24:00,840 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:00,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:01,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:24:01,104 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:01,104 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-07-23 15:24:01,105 INFO L450 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-07-23 15:24:01,105 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-07-23 15:24:01,105 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-07-23 15:24:01,105 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 47 states. [2018-07-23 15:24:02,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:02,262 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-07-23 15:24:02,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-07-23 15:24:02,262 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-07-23 15:24:02,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:02,263 INFO L225 Difference]: With dead ends: 97 [2018-07-23 15:24:02,263 INFO L226 Difference]: Without dead ends: 95 [2018-07-23 15:24:02,264 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2115, Invalid=6075, Unknown=0, NotChecked=0, Total=8190 [2018-07-23 15:24:02,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-07-23 15:24:02,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-07-23 15:24:02,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-07-23 15:24:02,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-07-23 15:24:02,271 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2018-07-23 15:24:02,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:02,272 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-07-23 15:24:02,272 INFO L472 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-07-23 15:24:02,272 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-07-23 15:24:02,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-07-23 15:24:02,273 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:02,273 INFO L353 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1] [2018-07-23 15:24:02,273 INFO L414 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:02,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1377234553, now seen corresponding path program 45 times [2018-07-23 15:24:02,274 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:02,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:02,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:24:02,581 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:02,581 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2018-07-23 15:24:02,582 INFO L450 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-07-23 15:24:02,582 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-07-23 15:24:02,582 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-07-23 15:24:02,582 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 48 states. [2018-07-23 15:24:03,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:03,818 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-07-23 15:24:03,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-07-23 15:24:03,818 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-07-23 15:24:03,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:03,819 INFO L225 Difference]: With dead ends: 99 [2018-07-23 15:24:03,819 INFO L226 Difference]: Without dead ends: 97 [2018-07-23 15:24:03,820 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2208, Invalid=6348, Unknown=0, NotChecked=0, Total=8556 [2018-07-23 15:24:03,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-07-23 15:24:03,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-07-23 15:24:03,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-07-23 15:24:03,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-07-23 15:24:03,827 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2018-07-23 15:24:03,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:03,828 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-07-23 15:24:03,828 INFO L472 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-07-23 15:24:03,828 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-07-23 15:24:03,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-07-23 15:24:03,829 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:03,829 INFO L353 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1] [2018-07-23 15:24:03,829 INFO L414 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:03,829 INFO L82 PathProgramCache]: Analyzing trace with hash 672530355, now seen corresponding path program 46 times [2018-07-23 15:24:03,829 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:03,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:04,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:24:04,175 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:04,175 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-07-23 15:24:04,176 INFO L450 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-07-23 15:24:04,176 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-07-23 15:24:04,177 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-07-23 15:24:04,177 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 49 states. [2018-07-23 15:24:05,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:05,577 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-07-23 15:24:05,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-07-23 15:24:05,577 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-07-23 15:24:05,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:05,578 INFO L225 Difference]: With dead ends: 101 [2018-07-23 15:24:05,578 INFO L226 Difference]: Without dead ends: 99 [2018-07-23 15:24:05,579 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2303, Invalid=6627, Unknown=0, NotChecked=0, Total=8930 [2018-07-23 15:24:05,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-07-23 15:24:05,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-07-23 15:24:05,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-07-23 15:24:05,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-07-23 15:24:05,586 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2018-07-23 15:24:05,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:05,587 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-07-23 15:24:05,587 INFO L472 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-07-23 15:24:05,587 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-07-23 15:24:05,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-07-23 15:24:05,588 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:05,588 INFO L353 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1] [2018-07-23 15:24:05,588 INFO L414 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:05,588 INFO L82 PathProgramCache]: Analyzing trace with hash 2056628845, now seen corresponding path program 47 times [2018-07-23 15:24:05,588 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:05,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:05,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:24:05,913 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:05,913 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2018-07-23 15:24:05,913 INFO L450 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-07-23 15:24:05,913 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-07-23 15:24:05,914 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-07-23 15:24:05,914 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 50 states. [2018-07-23 15:24:07,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:07,342 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-07-23 15:24:07,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-07-23 15:24:07,342 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-07-23 15:24:07,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:07,343 INFO L225 Difference]: With dead ends: 103 [2018-07-23 15:24:07,343 INFO L226 Difference]: Without dead ends: 101 [2018-07-23 15:24:07,344 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2400, Invalid=6912, Unknown=0, NotChecked=0, Total=9312 [2018-07-23 15:24:07,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-07-23 15:24:07,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-07-23 15:24:07,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-07-23 15:24:07,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-07-23 15:24:07,352 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2018-07-23 15:24:07,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:07,352 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-07-23 15:24:07,352 INFO L472 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-07-23 15:24:07,352 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-07-23 15:24:07,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-07-23 15:24:07,353 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:07,353 INFO L353 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1] [2018-07-23 15:24:07,353 INFO L414 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:07,354 INFO L82 PathProgramCache]: Analyzing trace with hash 735415975, now seen corresponding path program 48 times [2018-07-23 15:24:07,354 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:07,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:07,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:24:07,637 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:07,637 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2018-07-23 15:24:07,637 INFO L450 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-07-23 15:24:07,638 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-07-23 15:24:07,638 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-07-23 15:24:07,638 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 51 states. [2018-07-23 15:24:09,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:09,194 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-07-23 15:24:09,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-07-23 15:24:09,194 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-07-23 15:24:09,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:09,195 INFO L225 Difference]: With dead ends: 105 [2018-07-23 15:24:09,195 INFO L226 Difference]: Without dead ends: 103 [2018-07-23 15:24:09,196 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2499, Invalid=7203, Unknown=0, NotChecked=0, Total=9702 [2018-07-23 15:24:09,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-07-23 15:24:09,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-07-23 15:24:09,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-07-23 15:24:09,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-07-23 15:24:09,203 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2018-07-23 15:24:09,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:09,203 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-07-23 15:24:09,203 INFO L472 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-07-23 15:24:09,204 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-07-23 15:24:09,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-07-23 15:24:09,204 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:09,204 INFO L353 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1] [2018-07-23 15:24:09,204 INFO L414 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:09,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1934799775, now seen corresponding path program 49 times [2018-07-23 15:24:09,204 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:09,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:09,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:24:09,572 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:09,572 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2018-07-23 15:24:09,572 INFO L450 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-07-23 15:24:09,572 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-07-23 15:24:09,573 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-07-23 15:24:09,573 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 52 states. [2018-07-23 15:24:10,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:10,980 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-07-23 15:24:10,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-07-23 15:24:10,981 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-07-23 15:24:10,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:10,981 INFO L225 Difference]: With dead ends: 107 [2018-07-23 15:24:10,981 INFO L226 Difference]: Without dead ends: 105 [2018-07-23 15:24:10,982 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2600, Invalid=7500, Unknown=0, NotChecked=0, Total=10100 [2018-07-23 15:24:10,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-07-23 15:24:10,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-07-23 15:24:10,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-07-23 15:24:10,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-07-23 15:24:10,989 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2018-07-23 15:24:10,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:10,989 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-07-23 15:24:10,989 INFO L472 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-07-23 15:24:10,989 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-07-23 15:24:10,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-07-23 15:24:10,990 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:10,990 INFO L353 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1] [2018-07-23 15:24:10,990 INFO L414 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:10,990 INFO L82 PathProgramCache]: Analyzing trace with hash 378307483, now seen corresponding path program 50 times [2018-07-23 15:24:10,990 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:11,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:11,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:24:11,330 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:11,331 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-07-23 15:24:11,331 INFO L450 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-07-23 15:24:11,331 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-07-23 15:24:11,331 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-07-23 15:24:11,332 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 53 states. [2018-07-23 15:24:13,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:13,085 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-07-23 15:24:13,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-07-23 15:24:13,085 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-07-23 15:24:13,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:13,087 INFO L225 Difference]: With dead ends: 109 [2018-07-23 15:24:13,087 INFO L226 Difference]: Without dead ends: 107 [2018-07-23 15:24:13,088 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2703, Invalid=7803, Unknown=0, NotChecked=0, Total=10506 [2018-07-23 15:24:13,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-07-23 15:24:13,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-07-23 15:24:13,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-07-23 15:24:13,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-07-23 15:24:13,102 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2018-07-23 15:24:13,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:13,102 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-07-23 15:24:13,102 INFO L472 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-07-23 15:24:13,102 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-07-23 15:24:13,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-07-23 15:24:13,103 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:13,105 INFO L353 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1] [2018-07-23 15:24:13,105 INFO L414 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:13,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1518676907, now seen corresponding path program 51 times [2018-07-23 15:24:13,105 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:13,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:13,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:24:13,600 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:13,600 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2018-07-23 15:24:13,600 INFO L450 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-07-23 15:24:13,601 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-07-23 15:24:13,601 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-07-23 15:24:13,601 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 54 states. [2018-07-23 15:24:15,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:15,193 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-07-23 15:24:15,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-07-23 15:24:15,193 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-07-23 15:24:15,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:15,194 INFO L225 Difference]: With dead ends: 111 [2018-07-23 15:24:15,194 INFO L226 Difference]: Without dead ends: 109 [2018-07-23 15:24:15,195 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2808, Invalid=8112, Unknown=0, NotChecked=0, Total=10920 [2018-07-23 15:24:15,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-07-23 15:24:15,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-07-23 15:24:15,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-07-23 15:24:15,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-07-23 15:24:15,202 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2018-07-23 15:24:15,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:15,203 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-07-23 15:24:15,203 INFO L472 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-07-23 15:24:15,203 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-07-23 15:24:15,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-07-23 15:24:15,204 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:15,204 INFO L353 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1] [2018-07-23 15:24:15,204 INFO L414 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:15,204 INFO L82 PathProgramCache]: Analyzing trace with hash 840425103, now seen corresponding path program 52 times [2018-07-23 15:24:15,204 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:15,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:15,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:24:15,523 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:15,523 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2018-07-23 15:24:15,523 INFO L450 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-07-23 15:24:15,523 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-07-23 15:24:15,523 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-07-23 15:24:15,524 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 55 states. [2018-07-23 15:24:17,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:17,195 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-07-23 15:24:17,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-07-23 15:24:17,195 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-07-23 15:24:17,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:17,196 INFO L225 Difference]: With dead ends: 113 [2018-07-23 15:24:17,196 INFO L226 Difference]: Without dead ends: 111 [2018-07-23 15:24:17,197 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2915, Invalid=8427, Unknown=0, NotChecked=0, Total=11342 [2018-07-23 15:24:17,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-07-23 15:24:17,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-07-23 15:24:17,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-07-23 15:24:17,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-07-23 15:24:17,205 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2018-07-23 15:24:17,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:17,205 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-07-23 15:24:17,205 INFO L472 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-07-23 15:24:17,205 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-07-23 15:24:17,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-07-23 15:24:17,206 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:17,206 INFO L353 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1] [2018-07-23 15:24:17,206 INFO L414 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:17,206 INFO L82 PathProgramCache]: Analyzing trace with hash 194724425, now seen corresponding path program 53 times [2018-07-23 15:24:17,206 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:17,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:17,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:24:17,547 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:17,547 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2018-07-23 15:24:17,547 INFO L450 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-07-23 15:24:17,547 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-07-23 15:24:17,547 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-07-23 15:24:17,548 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 56 states. [2018-07-23 15:24:19,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:19,312 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-07-23 15:24:19,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-07-23 15:24:19,313 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-07-23 15:24:19,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:19,314 INFO L225 Difference]: With dead ends: 115 [2018-07-23 15:24:19,314 INFO L226 Difference]: Without dead ends: 113 [2018-07-23 15:24:19,315 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1378 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3024, Invalid=8748, Unknown=0, NotChecked=0, Total=11772 [2018-07-23 15:24:19,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-07-23 15:24:19,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-07-23 15:24:19,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-07-23 15:24:19,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-07-23 15:24:19,323 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2018-07-23 15:24:19,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:19,324 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-07-23 15:24:19,324 INFO L472 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-07-23 15:24:19,324 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-07-23 15:24:19,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-07-23 15:24:19,324 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:19,325 INFO L353 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1] [2018-07-23 15:24:19,325 INFO L414 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:19,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1848336509, now seen corresponding path program 54 times [2018-07-23 15:24:19,325 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:19,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:19,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:24:19,674 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:19,674 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2018-07-23 15:24:19,675 INFO L450 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-07-23 15:24:19,675 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-07-23 15:24:19,675 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-07-23 15:24:19,675 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 57 states. [2018-07-23 15:24:21,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:21,590 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-07-23 15:24:21,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-07-23 15:24:21,590 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-07-23 15:24:21,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:21,591 INFO L225 Difference]: With dead ends: 117 [2018-07-23 15:24:21,591 INFO L226 Difference]: Without dead ends: 115 [2018-07-23 15:24:21,592 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3135, Invalid=9075, Unknown=0, NotChecked=0, Total=12210 [2018-07-23 15:24:21,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-07-23 15:24:21,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-07-23 15:24:21,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-07-23 15:24:21,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-07-23 15:24:21,598 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2018-07-23 15:24:21,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:21,598 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-07-23 15:24:21,598 INFO L472 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-07-23 15:24:21,598 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-07-23 15:24:21,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-07-23 15:24:21,599 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:21,599 INFO L353 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1] [2018-07-23 15:24:21,599 INFO L414 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:21,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1865127485, now seen corresponding path program 55 times [2018-07-23 15:24:21,599 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:21,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:22,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:24:22,091 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:22,091 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2018-07-23 15:24:22,091 INFO L450 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-07-23 15:24:22,095 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-07-23 15:24:22,095 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-07-23 15:24:22,096 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 58 states. [2018-07-23 15:24:24,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:24,451 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-07-23 15:24:24,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-07-23 15:24:24,451 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-07-23 15:24:24,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:24,452 INFO L225 Difference]: With dead ends: 119 [2018-07-23 15:24:24,453 INFO L226 Difference]: Without dead ends: 117 [2018-07-23 15:24:24,453 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3248, Invalid=9408, Unknown=0, NotChecked=0, Total=12656 [2018-07-23 15:24:24,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-07-23 15:24:24,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-07-23 15:24:24,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-07-23 15:24:24,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-07-23 15:24:24,459 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2018-07-23 15:24:24,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:24,460 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-07-23 15:24:24,460 INFO L472 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-07-23 15:24:24,460 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-07-23 15:24:24,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-07-23 15:24:24,461 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:24,461 INFO L353 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1] [2018-07-23 15:24:24,461 INFO L414 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:24,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1386202743, now seen corresponding path program 56 times [2018-07-23 15:24:24,461 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:24,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:24,924 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:24:24,924 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:24,925 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2018-07-23 15:24:24,925 INFO L450 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-07-23 15:24:24,925 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-07-23 15:24:24,926 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-07-23 15:24:24,926 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 59 states. [2018-07-23 15:24:27,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:27,041 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-07-23 15:24:27,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-07-23 15:24:27,041 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-07-23 15:24:27,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:27,042 INFO L225 Difference]: With dead ends: 121 [2018-07-23 15:24:27,042 INFO L226 Difference]: Without dead ends: 119 [2018-07-23 15:24:27,043 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3363, Invalid=9747, Unknown=0, NotChecked=0, Total=13110 [2018-07-23 15:24:27,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-07-23 15:24:27,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-07-23 15:24:27,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-07-23 15:24:27,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-07-23 15:24:27,052 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2018-07-23 15:24:27,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:27,052 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-07-23 15:24:27,052 INFO L472 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-07-23 15:24:27,053 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-07-23 15:24:27,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-07-23 15:24:27,053 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:27,053 INFO L353 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1] [2018-07-23 15:24:27,053 INFO L414 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:27,054 INFO L82 PathProgramCache]: Analyzing trace with hash 701026353, now seen corresponding path program 57 times [2018-07-23 15:24:27,054 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:27,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:27,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:24:27,467 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:27,467 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2018-07-23 15:24:27,467 INFO L450 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-07-23 15:24:27,467 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-07-23 15:24:27,467 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2018-07-23 15:24:27,468 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 60 states. [2018-07-23 15:24:29,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:29,781 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-07-23 15:24:29,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-07-23 15:24:29,781 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-07-23 15:24:29,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:29,782 INFO L225 Difference]: With dead ends: 123 [2018-07-23 15:24:29,782 INFO L226 Difference]: Without dead ends: 121 [2018-07-23 15:24:29,783 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3480, Invalid=10092, Unknown=0, NotChecked=0, Total=13572 [2018-07-23 15:24:29,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-07-23 15:24:29,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-07-23 15:24:29,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-07-23 15:24:29,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-07-23 15:24:29,792 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2018-07-23 15:24:29,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:29,792 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-07-23 15:24:29,792 INFO L472 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-07-23 15:24:29,792 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-07-23 15:24:29,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-07-23 15:24:29,793 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:29,793 INFO L353 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1] [2018-07-23 15:24:29,793 INFO L414 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:29,794 INFO L82 PathProgramCache]: Analyzing trace with hash -623488149, now seen corresponding path program 58 times [2018-07-23 15:24:29,794 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:29,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:30,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:24:30,375 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:30,375 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-07-23 15:24:30,375 INFO L450 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-07-23 15:24:30,375 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-07-23 15:24:30,376 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2018-07-23 15:24:30,376 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 61 states. [2018-07-23 15:24:32,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:32,990 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-07-23 15:24:32,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-07-23 15:24:32,990 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 120 [2018-07-23 15:24:32,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:32,991 INFO L225 Difference]: With dead ends: 125 [2018-07-23 15:24:32,991 INFO L226 Difference]: Without dead ends: 123 [2018-07-23 15:24:32,991 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3599, Invalid=10443, Unknown=0, NotChecked=0, Total=14042 [2018-07-23 15:24:32,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-07-23 15:24:32,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-07-23 15:24:32,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-07-23 15:24:32,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-07-23 15:24:32,999 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2018-07-23 15:24:32,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:32,999 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-07-23 15:24:32,999 INFO L472 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-07-23 15:24:32,999 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-07-23 15:24:33,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-07-23 15:24:33,000 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:33,000 INFO L353 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1] [2018-07-23 15:24:33,000 INFO L414 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:33,000 INFO L82 PathProgramCache]: Analyzing trace with hash 2123362341, now seen corresponding path program 59 times [2018-07-23 15:24:33,001 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:33,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:33,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:24:33,572 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:33,572 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2018-07-23 15:24:33,573 INFO L450 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-07-23 15:24:33,573 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-07-23 15:24:33,573 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2018-07-23 15:24:33,574 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 62 states. [2018-07-23 15:24:36,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:36,065 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-07-23 15:24:36,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-07-23 15:24:36,065 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2018-07-23 15:24:36,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:36,066 INFO L225 Difference]: With dead ends: 127 [2018-07-23 15:24:36,067 INFO L226 Difference]: Without dead ends: 125 [2018-07-23 15:24:36,068 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1711 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3720, Invalid=10800, Unknown=0, NotChecked=0, Total=14520 [2018-07-23 15:24:36,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-07-23 15:24:36,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-07-23 15:24:36,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-07-23 15:24:36,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-07-23 15:24:36,076 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2018-07-23 15:24:36,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:36,077 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-07-23 15:24:36,077 INFO L472 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-07-23 15:24:36,077 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-07-23 15:24:36,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-07-23 15:24:36,077 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:36,078 INFO L353 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1] [2018-07-23 15:24:36,078 INFO L414 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:36,078 INFO L82 PathProgramCache]: Analyzing trace with hash 441796191, now seen corresponding path program 60 times [2018-07-23 15:24:36,078 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:36,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:36,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:24:36,547 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:36,547 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2018-07-23 15:24:36,547 INFO L450 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-07-23 15:24:36,548 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-07-23 15:24:36,548 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2018-07-23 15:24:36,548 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 63 states. [2018-07-23 15:24:39,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:39,112 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-07-23 15:24:39,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-07-23 15:24:39,112 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 124 [2018-07-23 15:24:39,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:39,114 INFO L225 Difference]: With dead ends: 129 [2018-07-23 15:24:39,114 INFO L226 Difference]: Without dead ends: 127 [2018-07-23 15:24:39,115 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3843, Invalid=11163, Unknown=0, NotChecked=0, Total=15006 [2018-07-23 15:24:39,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-07-23 15:24:39,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-07-23 15:24:39,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-07-23 15:24:39,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-07-23 15:24:39,123 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2018-07-23 15:24:39,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:39,124 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-07-23 15:24:39,124 INFO L472 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-07-23 15:24:39,124 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-07-23 15:24:39,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-07-23 15:24:39,125 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:39,125 INFO L353 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1] [2018-07-23 15:24:39,125 INFO L414 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:39,125 INFO L82 PathProgramCache]: Analyzing trace with hash -635570663, now seen corresponding path program 61 times [2018-07-23 15:24:39,126 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:39,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:39,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:24:39,610 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:39,611 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2018-07-23 15:24:39,611 INFO L450 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-07-23 15:24:39,611 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-07-23 15:24:39,612 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2018-07-23 15:24:39,612 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 64 states. [2018-07-23 15:24:42,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:42,293 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-07-23 15:24:42,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-07-23 15:24:42,293 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2018-07-23 15:24:42,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:42,294 INFO L225 Difference]: With dead ends: 131 [2018-07-23 15:24:42,294 INFO L226 Difference]: Without dead ends: 129 [2018-07-23 15:24:42,295 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3968, Invalid=11532, Unknown=0, NotChecked=0, Total=15500 [2018-07-23 15:24:42,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-07-23 15:24:42,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-07-23 15:24:42,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-07-23 15:24:42,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-07-23 15:24:42,312 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2018-07-23 15:24:42,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:42,312 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-07-23 15:24:42,312 INFO L472 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-07-23 15:24:42,314 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-07-23 15:24:42,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-07-23 15:24:42,314 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:42,314 INFO L353 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1] [2018-07-23 15:24:42,315 INFO L414 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:42,315 INFO L82 PathProgramCache]: Analyzing trace with hash -897999021, now seen corresponding path program 62 times [2018-07-23 15:24:42,315 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:42,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:42,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:24:42,807 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:42,808 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-07-23 15:24:42,808 INFO L450 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-07-23 15:24:42,808 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-07-23 15:24:42,809 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2018-07-23 15:24:42,809 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 65 states. [2018-07-23 15:24:45,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:45,390 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-07-23 15:24:45,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-07-23 15:24:45,390 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 128 [2018-07-23 15:24:45,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:45,391 INFO L225 Difference]: With dead ends: 133 [2018-07-23 15:24:45,391 INFO L226 Difference]: Without dead ends: 131 [2018-07-23 15:24:45,391 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1891 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4095, Invalid=11907, Unknown=0, NotChecked=0, Total=16002 [2018-07-23 15:24:45,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-07-23 15:24:45,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-07-23 15:24:45,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-07-23 15:24:45,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-07-23 15:24:45,399 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2018-07-23 15:24:45,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:45,399 INFO L471 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-07-23 15:24:45,399 INFO L472 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-07-23 15:24:45,399 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-07-23 15:24:45,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-07-23 15:24:45,400 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:45,400 INFO L353 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1] [2018-07-23 15:24:45,404 INFO L414 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:45,405 INFO L82 PathProgramCache]: Analyzing trace with hash 311419405, now seen corresponding path program 63 times [2018-07-23 15:24:45,405 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:45,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:45,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:24:45,904 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:45,905 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2018-07-23 15:24:45,905 INFO L450 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-07-23 15:24:45,905 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-07-23 15:24:45,906 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2018-07-23 15:24:45,906 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 66 states. [2018-07-23 15:24:49,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:49,127 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-07-23 15:24:49,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-07-23 15:24:49,127 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2018-07-23 15:24:49,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:49,128 INFO L225 Difference]: With dead ends: 135 [2018-07-23 15:24:49,128 INFO L226 Difference]: Without dead ends: 133 [2018-07-23 15:24:49,129 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1953 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4224, Invalid=12288, Unknown=0, NotChecked=0, Total=16512 [2018-07-23 15:24:49,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-07-23 15:24:49,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-07-23 15:24:49,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-07-23 15:24:49,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-07-23 15:24:49,138 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2018-07-23 15:24:49,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:49,138 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-07-23 15:24:49,138 INFO L472 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-07-23 15:24:49,139 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-07-23 15:24:49,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-07-23 15:24:49,139 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:49,139 INFO L353 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1] [2018-07-23 15:24:49,140 INFO L414 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:49,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1373610425, now seen corresponding path program 64 times [2018-07-23 15:24:49,140 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:49,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:49,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:24:49,707 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:49,707 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2018-07-23 15:24:49,708 INFO L450 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-07-23 15:24:49,708 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-07-23 15:24:49,708 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2018-07-23 15:24:49,708 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 67 states. [2018-07-23 15:24:52,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:52,769 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-07-23 15:24:52,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-07-23 15:24:52,769 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 132 [2018-07-23 15:24:52,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:52,770 INFO L225 Difference]: With dead ends: 137 [2018-07-23 15:24:52,770 INFO L226 Difference]: Without dead ends: 135 [2018-07-23 15:24:52,772 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2016 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4355, Invalid=12675, Unknown=0, NotChecked=0, Total=17030 [2018-07-23 15:24:52,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-07-23 15:24:52,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-07-23 15:24:52,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-07-23 15:24:52,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-07-23 15:24:52,782 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2018-07-23 15:24:52,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:52,782 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-07-23 15:24:52,783 INFO L472 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-07-23 15:24:52,783 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-07-23 15:24:52,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-07-23 15:24:52,783 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:52,784 INFO L353 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1] [2018-07-23 15:24:52,784 INFO L414 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:52,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1484606463, now seen corresponding path program 65 times [2018-07-23 15:24:52,784 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:53,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:53,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:24:53,327 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:53,327 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2018-07-23 15:24:53,328 INFO L450 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-07-23 15:24:53,328 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-07-23 15:24:53,328 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2018-07-23 15:24:53,329 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 68 states. [2018-07-23 15:24:56,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:24:56,578 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-07-23 15:24:56,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-07-23 15:24:56,578 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2018-07-23 15:24:56,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:24:56,579 INFO L225 Difference]: With dead ends: 139 [2018-07-23 15:24:56,579 INFO L226 Difference]: Without dead ends: 137 [2018-07-23 15:24:56,580 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4488, Invalid=13068, Unknown=0, NotChecked=0, Total=17556 [2018-07-23 15:24:56,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-07-23 15:24:56,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-07-23 15:24:56,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-07-23 15:24:56,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-07-23 15:24:56,590 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2018-07-23 15:24:56,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:24:56,590 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-07-23 15:24:56,590 INFO L472 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-07-23 15:24:56,590 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-07-23 15:24:56,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-07-23 15:24:56,591 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:24:56,591 INFO L353 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1] [2018-07-23 15:24:56,591 INFO L414 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:24:56,592 INFO L82 PathProgramCache]: Analyzing trace with hash -777616581, now seen corresponding path program 66 times [2018-07-23 15:24:56,592 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:24:56,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:24:57,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:24:57,226 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:24:57,226 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2018-07-23 15:24:57,227 INFO L450 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-07-23 15:24:57,227 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-07-23 15:24:57,227 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2018-07-23 15:24:57,227 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 69 states. [2018-07-23 15:25:00,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:00,496 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-07-23 15:25:00,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-07-23 15:25:00,496 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 136 [2018-07-23 15:25:00,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:00,497 INFO L225 Difference]: With dead ends: 141 [2018-07-23 15:25:00,497 INFO L226 Difference]: Without dead ends: 139 [2018-07-23 15:25:00,498 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2145 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4623, Invalid=13467, Unknown=0, NotChecked=0, Total=18090 [2018-07-23 15:25:00,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-07-23 15:25:00,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-07-23 15:25:00,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-07-23 15:25:00,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-07-23 15:25:00,508 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2018-07-23 15:25:00,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:00,508 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-07-23 15:25:00,508 INFO L472 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-07-23 15:25:00,508 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-07-23 15:25:00,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-07-23 15:25:00,509 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:00,509 INFO L353 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1] [2018-07-23 15:25:00,510 INFO L414 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:00,510 INFO L82 PathProgramCache]: Analyzing trace with hash 34827253, now seen corresponding path program 67 times [2018-07-23 15:25:00,510 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:00,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:01,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:01,119 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:01,119 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2018-07-23 15:25:01,119 INFO L450 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-07-23 15:25:01,120 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-07-23 15:25:01,120 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2018-07-23 15:25:01,120 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 70 states. [2018-07-23 15:25:04,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:04,644 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-07-23 15:25:04,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-07-23 15:25:04,644 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2018-07-23 15:25:04,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:04,645 INFO L225 Difference]: With dead ends: 143 [2018-07-23 15:25:04,645 INFO L226 Difference]: Without dead ends: 141 [2018-07-23 15:25:04,646 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2211 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4760, Invalid=13872, Unknown=0, NotChecked=0, Total=18632 [2018-07-23 15:25:04,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-07-23 15:25:04,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-07-23 15:25:04,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-07-23 15:25:04,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-07-23 15:25:04,654 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2018-07-23 15:25:04,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:04,655 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-07-23 15:25:04,655 INFO L472 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-07-23 15:25:04,655 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-07-23 15:25:04,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-07-23 15:25:04,656 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:04,656 INFO L353 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1] [2018-07-23 15:25:04,656 INFO L414 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:04,656 INFO L82 PathProgramCache]: Analyzing trace with hash -890696145, now seen corresponding path program 68 times [2018-07-23 15:25:04,656 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:04,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:05,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:05,226 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:05,226 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2018-07-23 15:25:05,226 INFO L450 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-07-23 15:25:05,226 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-07-23 15:25:05,227 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2018-07-23 15:25:05,227 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 71 states. [2018-07-23 15:25:08,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:08,368 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-07-23 15:25:08,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-07-23 15:25:08,368 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 140 [2018-07-23 15:25:08,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:08,369 INFO L225 Difference]: With dead ends: 145 [2018-07-23 15:25:08,369 INFO L226 Difference]: Without dead ends: 143 [2018-07-23 15:25:08,370 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2278 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4899, Invalid=14283, Unknown=0, NotChecked=0, Total=19182 [2018-07-23 15:25:08,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-07-23 15:25:08,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-07-23 15:25:08,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-07-23 15:25:08,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-07-23 15:25:08,379 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2018-07-23 15:25:08,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:08,380 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-07-23 15:25:08,380 INFO L472 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-07-23 15:25:08,380 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-07-23 15:25:08,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-07-23 15:25:08,380 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:08,380 INFO L353 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1] [2018-07-23 15:25:08,381 INFO L414 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:08,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1260451351, now seen corresponding path program 69 times [2018-07-23 15:25:08,381 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:08,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:08,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:08,974 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:08,974 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2018-07-23 15:25:08,975 INFO L450 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-07-23 15:25:08,975 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-07-23 15:25:08,975 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2018-07-23 15:25:08,975 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 72 states. [2018-07-23 15:25:12,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:12,616 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-07-23 15:25:12,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-07-23 15:25:12,616 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2018-07-23 15:25:12,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:12,617 INFO L225 Difference]: With dead ends: 147 [2018-07-23 15:25:12,617 INFO L226 Difference]: Without dead ends: 145 [2018-07-23 15:25:12,618 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2346 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5040, Invalid=14700, Unknown=0, NotChecked=0, Total=19740 [2018-07-23 15:25:12,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-07-23 15:25:12,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-07-23 15:25:12,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-07-23 15:25:12,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-07-23 15:25:12,627 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2018-07-23 15:25:12,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:12,627 INFO L471 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-07-23 15:25:12,627 INFO L472 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-07-23 15:25:12,627 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-07-23 15:25:12,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-07-23 15:25:12,628 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:12,628 INFO L353 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1] [2018-07-23 15:25:12,628 INFO L414 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:12,628 INFO L82 PathProgramCache]: Analyzing trace with hash -112918749, now seen corresponding path program 70 times [2018-07-23 15:25:12,628 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:12,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:13,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:13,250 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:13,250 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2018-07-23 15:25:13,250 INFO L450 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-07-23 15:25:13,250 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-07-23 15:25:13,251 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2018-07-23 15:25:13,251 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 73 states. [2018-07-23 15:25:17,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:17,062 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-07-23 15:25:17,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-07-23 15:25:17,062 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 144 [2018-07-23 15:25:17,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:17,063 INFO L225 Difference]: With dead ends: 149 [2018-07-23 15:25:17,063 INFO L226 Difference]: Without dead ends: 147 [2018-07-23 15:25:17,064 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2415 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5183, Invalid=15123, Unknown=0, NotChecked=0, Total=20306 [2018-07-23 15:25:17,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-07-23 15:25:17,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-07-23 15:25:17,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-07-23 15:25:17,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-07-23 15:25:17,074 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2018-07-23 15:25:17,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:17,074 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-07-23 15:25:17,075 INFO L472 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-07-23 15:25:17,075 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-07-23 15:25:17,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-07-23 15:25:17,075 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:17,076 INFO L353 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1] [2018-07-23 15:25:17,076 INFO L414 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:17,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1140683299, now seen corresponding path program 71 times [2018-07-23 15:25:17,076 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:17,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:17,719 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:17,719 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:17,720 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2018-07-23 15:25:17,720 INFO L450 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-07-23 15:25:17,720 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-07-23 15:25:17,720 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2018-07-23 15:25:17,721 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 74 states. [2018-07-23 15:25:22,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:22,253 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-07-23 15:25:22,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-07-23 15:25:22,253 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2018-07-23 15:25:22,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:22,254 INFO L225 Difference]: With dead ends: 151 [2018-07-23 15:25:22,254 INFO L226 Difference]: Without dead ends: 149 [2018-07-23 15:25:22,255 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2485 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=5328, Invalid=15552, Unknown=0, NotChecked=0, Total=20880 [2018-07-23 15:25:22,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-07-23 15:25:22,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-07-23 15:25:22,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-07-23 15:25:22,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-07-23 15:25:22,265 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2018-07-23 15:25:22,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:22,265 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-07-23 15:25:22,265 INFO L472 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-07-23 15:25:22,266 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-07-23 15:25:22,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-07-23 15:25:22,266 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:22,266 INFO L353 BasicCegarLoop]: trace histogram [73, 72, 1, 1, 1] [2018-07-23 15:25:22,267 INFO L414 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:22,267 INFO L82 PathProgramCache]: Analyzing trace with hash -979937769, now seen corresponding path program 72 times [2018-07-23 15:25:22,267 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:22,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:22,944 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:22,945 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:22,945 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2018-07-23 15:25:22,945 INFO L450 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-07-23 15:25:22,945 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-07-23 15:25:22,946 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2018-07-23 15:25:22,946 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 75 states. [2018-07-23 15:25:27,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:27,185 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-07-23 15:25:27,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-07-23 15:25:27,185 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 148 [2018-07-23 15:25:27,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:27,186 INFO L225 Difference]: With dead ends: 153 [2018-07-23 15:25:27,186 INFO L226 Difference]: Without dead ends: 151 [2018-07-23 15:25:27,187 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2556 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=5475, Invalid=15987, Unknown=0, NotChecked=0, Total=21462 [2018-07-23 15:25:27,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-07-23 15:25:27,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-07-23 15:25:27,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-07-23 15:25:27,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-07-23 15:25:27,197 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2018-07-23 15:25:27,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:27,197 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-07-23 15:25:27,197 INFO L472 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-07-23 15:25:27,197 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-07-23 15:25:27,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-07-23 15:25:27,198 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:27,198 INFO L353 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1] [2018-07-23 15:25:27,198 INFO L414 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:27,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1122306095, now seen corresponding path program 73 times [2018-07-23 15:25:27,199 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:27,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:27,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:27,843 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:27,843 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2018-07-23 15:25:27,844 INFO L450 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-07-23 15:25:27,844 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-07-23 15:25:27,844 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=5551, Unknown=0, NotChecked=0, Total=5700 [2018-07-23 15:25:27,845 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 76 states. [2018-07-23 15:25:32,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:32,193 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-07-23 15:25:32,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-07-23 15:25:32,193 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 150 [2018-07-23 15:25:32,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:32,194 INFO L225 Difference]: With dead ends: 155 [2018-07-23 15:25:32,194 INFO L226 Difference]: Without dead ends: 153 [2018-07-23 15:25:32,195 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2628 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=5624, Invalid=16428, Unknown=0, NotChecked=0, Total=22052 [2018-07-23 15:25:32,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-07-23 15:25:32,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-07-23 15:25:32,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-07-23 15:25:32,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-07-23 15:25:32,205 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2018-07-23 15:25:32,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:32,205 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-07-23 15:25:32,205 INFO L472 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-07-23 15:25:32,205 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-07-23 15:25:32,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-07-23 15:25:32,206 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:32,206 INFO L353 BasicCegarLoop]: trace histogram [75, 74, 1, 1, 1] [2018-07-23 15:25:32,206 INFO L414 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:32,207 INFO L82 PathProgramCache]: Analyzing trace with hash -499313909, now seen corresponding path program 74 times [2018-07-23 15:25:32,207 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:32,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:33,088 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:33,089 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:33,089 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2018-07-23 15:25:33,089 INFO L450 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-07-23 15:25:33,089 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-07-23 15:25:33,090 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=5701, Unknown=0, NotChecked=0, Total=5852 [2018-07-23 15:25:33,090 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 77 states. [2018-07-23 15:25:37,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:37,584 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-07-23 15:25:37,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-07-23 15:25:37,584 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 152 [2018-07-23 15:25:37,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:37,585 INFO L225 Difference]: With dead ends: 157 [2018-07-23 15:25:37,585 INFO L226 Difference]: Without dead ends: 155 [2018-07-23 15:25:37,586 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2701 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=5775, Invalid=16875, Unknown=0, NotChecked=0, Total=22650 [2018-07-23 15:25:37,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-07-23 15:25:37,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-07-23 15:25:37,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-07-23 15:25:37,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-07-23 15:25:37,596 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2018-07-23 15:25:37,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:37,596 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-07-23 15:25:37,596 INFO L472 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-07-23 15:25:37,596 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-07-23 15:25:37,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-07-23 15:25:37,597 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:37,597 INFO L353 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1] [2018-07-23 15:25:37,597 INFO L414 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:37,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1195722693, now seen corresponding path program 75 times [2018-07-23 15:25:37,597 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:37,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:38,331 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:38,331 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:38,331 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2018-07-23 15:25:38,332 INFO L450 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-07-23 15:25:38,332 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-07-23 15:25:38,332 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=5853, Unknown=0, NotChecked=0, Total=6006 [2018-07-23 15:25:38,333 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 78 states. [2018-07-23 15:25:42,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:42,966 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-07-23 15:25:42,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-07-23 15:25:42,966 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 154 [2018-07-23 15:25:42,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:42,967 INFO L225 Difference]: With dead ends: 159 [2018-07-23 15:25:42,967 INFO L226 Difference]: Without dead ends: 157 [2018-07-23 15:25:42,969 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2775 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=5928, Invalid=17328, Unknown=0, NotChecked=0, Total=23256 [2018-07-23 15:25:42,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-07-23 15:25:42,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-07-23 15:25:42,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-07-23 15:25:42,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2018-07-23 15:25:42,978 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2018-07-23 15:25:42,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:42,979 INFO L471 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2018-07-23 15:25:42,979 INFO L472 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-07-23 15:25:42,979 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2018-07-23 15:25:42,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-07-23 15:25:42,980 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:42,980 INFO L353 BasicCegarLoop]: trace histogram [77, 76, 1, 1, 1] [2018-07-23 15:25:42,980 INFO L414 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:42,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1961675265, now seen corresponding path program 76 times [2018-07-23 15:25:42,980 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:43,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:43,911 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:43,911 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:43,911 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2018-07-23 15:25:43,912 INFO L450 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-07-23 15:25:43,912 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-07-23 15:25:43,912 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=6007, Unknown=0, NotChecked=0, Total=6162 [2018-07-23 15:25:43,912 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 79 states. [2018-07-23 15:25:48,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:48,732 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-07-23 15:25:48,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-07-23 15:25:48,733 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 156 [2018-07-23 15:25:48,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:48,734 INFO L225 Difference]: With dead ends: 161 [2018-07-23 15:25:48,734 INFO L226 Difference]: Without dead ends: 159 [2018-07-23 15:25:48,735 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2850 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=6083, Invalid=17787, Unknown=0, NotChecked=0, Total=23870 [2018-07-23 15:25:48,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-07-23 15:25:48,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-07-23 15:25:48,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-07-23 15:25:48,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-07-23 15:25:48,744 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2018-07-23 15:25:48,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:48,744 INFO L471 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-07-23 15:25:48,745 INFO L472 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-07-23 15:25:48,745 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-07-23 15:25:48,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-07-23 15:25:48,745 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:48,745 INFO L353 BasicCegarLoop]: trace histogram [78, 77, 1, 1, 1] [2018-07-23 15:25:48,745 INFO L414 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:48,746 INFO L82 PathProgramCache]: Analyzing trace with hash 320765369, now seen corresponding path program 77 times [2018-07-23 15:25:48,746 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:49,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:49,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:49,692 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:49,693 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2018-07-23 15:25:49,693 INFO L450 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-07-23 15:25:49,693 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-07-23 15:25:49,693 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=6163, Unknown=0, NotChecked=0, Total=6320 [2018-07-23 15:25:49,694 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 80 states. [2018-07-23 15:25:54,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:25:54,743 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-07-23 15:25:54,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-07-23 15:25:54,743 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 158 [2018-07-23 15:25:54,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:25:54,744 INFO L225 Difference]: With dead ends: 163 [2018-07-23 15:25:54,744 INFO L226 Difference]: Without dead ends: 161 [2018-07-23 15:25:54,745 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2926 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=6240, Invalid=18252, Unknown=0, NotChecked=0, Total=24492 [2018-07-23 15:25:54,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-07-23 15:25:54,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-07-23 15:25:54,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-07-23 15:25:54,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2018-07-23 15:25:54,754 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2018-07-23 15:25:54,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:25:54,754 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2018-07-23 15:25:54,754 INFO L472 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-07-23 15:25:54,754 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2018-07-23 15:25:54,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-07-23 15:25:54,754 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:25:54,755 INFO L353 BasicCegarLoop]: trace histogram [79, 78, 1, 1, 1] [2018-07-23 15:25:54,755 INFO L414 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:25:54,755 INFO L82 PathProgramCache]: Analyzing trace with hash -982073613, now seen corresponding path program 78 times [2018-07-23 15:25:54,755 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:25:55,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:25:55,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:25:55,546 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:25:55,546 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2018-07-23 15:25:55,547 INFO L450 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-07-23 15:25:55,547 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-07-23 15:25:55,547 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=6321, Unknown=0, NotChecked=0, Total=6480 [2018-07-23 15:25:55,547 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 81 states. [2018-07-23 15:26:00,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:00,386 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-07-23 15:26:00,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-07-23 15:26:00,387 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 160 [2018-07-23 15:26:00,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:00,388 INFO L225 Difference]: With dead ends: 165 [2018-07-23 15:26:00,388 INFO L226 Difference]: Without dead ends: 163 [2018-07-23 15:26:00,389 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3003 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=6399, Invalid=18723, Unknown=0, NotChecked=0, Total=25122 [2018-07-23 15:26:00,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-07-23 15:26:00,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-07-23 15:26:00,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-07-23 15:26:00,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-07-23 15:26:00,398 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2018-07-23 15:26:00,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:00,399 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-07-23 15:26:00,399 INFO L472 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-07-23 15:26:00,399 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-07-23 15:26:00,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-07-23 15:26:00,400 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:00,400 INFO L353 BasicCegarLoop]: trace histogram [80, 79, 1, 1, 1] [2018-07-23 15:26:00,400 INFO L414 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:00,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1120115117, now seen corresponding path program 79 times [2018-07-23 15:26:00,400 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:00,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:01,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:26:01,166 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:01,166 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2018-07-23 15:26:01,166 INFO L450 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-07-23 15:26:01,166 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-07-23 15:26:01,167 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=6481, Unknown=0, NotChecked=0, Total=6642 [2018-07-23 15:26:01,167 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 82 states. [2018-07-23 15:26:06,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:06,133 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-07-23 15:26:06,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-07-23 15:26:06,133 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 162 [2018-07-23 15:26:06,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:06,134 INFO L225 Difference]: With dead ends: 167 [2018-07-23 15:26:06,134 INFO L226 Difference]: Without dead ends: 165 [2018-07-23 15:26:06,135 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3081 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=6560, Invalid=19200, Unknown=0, NotChecked=0, Total=25760 [2018-07-23 15:26:06,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-07-23 15:26:06,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-07-23 15:26:06,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-07-23 15:26:06,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2018-07-23 15:26:06,145 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2018-07-23 15:26:06,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:06,145 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2018-07-23 15:26:06,145 INFO L472 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-07-23 15:26:06,145 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2018-07-23 15:26:06,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-07-23 15:26:06,146 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:06,146 INFO L353 BasicCegarLoop]: trace histogram [81, 80, 1, 1, 1] [2018-07-23 15:26:06,146 INFO L414 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:06,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1606111769, now seen corresponding path program 80 times [2018-07-23 15:26:06,147 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:06,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:06,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:26:06,965 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:06,966 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2018-07-23 15:26:06,966 INFO L450 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-07-23 15:26:06,966 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-07-23 15:26:06,966 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=6643, Unknown=0, NotChecked=0, Total=6806 [2018-07-23 15:26:06,967 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 83 states. [2018-07-23 15:26:12,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:12,183 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-07-23 15:26:12,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-07-23 15:26:12,184 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 164 [2018-07-23 15:26:12,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:12,184 INFO L225 Difference]: With dead ends: 169 [2018-07-23 15:26:12,185 INFO L226 Difference]: Without dead ends: 167 [2018-07-23 15:26:12,185 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3160 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=6723, Invalid=19683, Unknown=0, NotChecked=0, Total=26406 [2018-07-23 15:26:12,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-07-23 15:26:12,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-07-23 15:26:12,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-07-23 15:26:12,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-07-23 15:26:12,192 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2018-07-23 15:26:12,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:12,192 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-07-23 15:26:12,192 INFO L472 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-07-23 15:26:12,192 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-07-23 15:26:12,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-07-23 15:26:12,193 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:12,193 INFO L353 BasicCegarLoop]: trace histogram [82, 81, 1, 1, 1] [2018-07-23 15:26:12,193 INFO L414 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:12,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1580098655, now seen corresponding path program 81 times [2018-07-23 15:26:12,194 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:12,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:13,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:26:13,028 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:13,028 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2018-07-23 15:26:13,028 INFO L450 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-07-23 15:26:13,028 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-07-23 15:26:13,029 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=6807, Unknown=0, NotChecked=0, Total=6972 [2018-07-23 15:26:13,029 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 84 states. [2018-07-23 15:26:18,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:18,600 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2018-07-23 15:26:18,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-07-23 15:26:18,601 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 166 [2018-07-23 15:26:18,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:18,602 INFO L225 Difference]: With dead ends: 171 [2018-07-23 15:26:18,602 INFO L226 Difference]: Without dead ends: 169 [2018-07-23 15:26:18,603 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3240 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=6888, Invalid=20172, Unknown=0, NotChecked=0, Total=27060 [2018-07-23 15:26:18,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-07-23 15:26:18,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-07-23 15:26:18,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-07-23 15:26:18,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2018-07-23 15:26:18,611 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2018-07-23 15:26:18,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:18,612 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2018-07-23 15:26:18,612 INFO L472 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-07-23 15:26:18,612 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2018-07-23 15:26:18,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-07-23 15:26:18,613 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:18,613 INFO L353 BasicCegarLoop]: trace histogram [83, 82, 1, 1, 1] [2018-07-23 15:26:18,613 INFO L414 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:18,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1943667419, now seen corresponding path program 82 times [2018-07-23 15:26:18,614 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:19,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:19,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:26:19,477 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:19,477 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2018-07-23 15:26:19,478 INFO L450 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-07-23 15:26:19,478 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-07-23 15:26:19,478 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=6973, Unknown=0, NotChecked=0, Total=7140 [2018-07-23 15:26:19,478 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 85 states. [2018-07-23 15:26:24,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:24,989 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-07-23 15:26:24,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-07-23 15:26:24,989 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 168 [2018-07-23 15:26:24,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:24,990 INFO L225 Difference]: With dead ends: 173 [2018-07-23 15:26:24,990 INFO L226 Difference]: Without dead ends: 171 [2018-07-23 15:26:24,991 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3321 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=7055, Invalid=20667, Unknown=0, NotChecked=0, Total=27722 [2018-07-23 15:26:24,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-07-23 15:26:24,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-07-23 15:26:24,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-07-23 15:26:24,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2018-07-23 15:26:24,998 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2018-07-23 15:26:24,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:24,998 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2018-07-23 15:26:24,998 INFO L472 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-07-23 15:26:24,998 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2018-07-23 15:26:24,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-07-23 15:26:24,999 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:24,999 INFO L353 BasicCegarLoop]: trace histogram [84, 83, 1, 1, 1] [2018-07-23 15:26:24,999 INFO L414 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:24,999 INFO L82 PathProgramCache]: Analyzing trace with hash -446332011, now seen corresponding path program 83 times [2018-07-23 15:26:24,999 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:25,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:25,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:26:25,872 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:25,872 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2018-07-23 15:26:25,872 INFO L450 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-07-23 15:26:25,873 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-07-23 15:26:25,873 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=7141, Unknown=0, NotChecked=0, Total=7310 [2018-07-23 15:26:25,873 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 86 states. [2018-07-23 15:26:31,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:31,955 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-07-23 15:26:31,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-07-23 15:26:31,955 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 170 [2018-07-23 15:26:31,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:31,957 INFO L225 Difference]: With dead ends: 175 [2018-07-23 15:26:31,957 INFO L226 Difference]: Without dead ends: 173 [2018-07-23 15:26:31,958 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3403 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=7224, Invalid=21168, Unknown=0, NotChecked=0, Total=28392 [2018-07-23 15:26:31,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-07-23 15:26:31,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-07-23 15:26:31,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-07-23 15:26:31,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-07-23 15:26:31,968 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2018-07-23 15:26:31,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:31,968 INFO L471 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-07-23 15:26:31,968 INFO L472 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-07-23 15:26:31,968 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-07-23 15:26:31,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-07-23 15:26:31,969 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:31,969 INFO L353 BasicCegarLoop]: trace histogram [85, 84, 1, 1, 1] [2018-07-23 15:26:31,969 INFO L414 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:31,969 INFO L82 PathProgramCache]: Analyzing trace with hash 571719119, now seen corresponding path program 84 times [2018-07-23 15:26:31,970 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:32,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:32,929 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:26:32,930 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:32,930 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2018-07-23 15:26:32,930 INFO L450 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-07-23 15:26:32,930 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-07-23 15:26:32,931 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=7311, Unknown=0, NotChecked=0, Total=7482 [2018-07-23 15:26:32,931 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 87 states. [2018-07-23 15:26:38,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:38,873 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-07-23 15:26:38,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-07-23 15:26:38,873 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 172 [2018-07-23 15:26:38,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:38,874 INFO L225 Difference]: With dead ends: 177 [2018-07-23 15:26:38,875 INFO L226 Difference]: Without dead ends: 175 [2018-07-23 15:26:38,876 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3486 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=7395, Invalid=21675, Unknown=0, NotChecked=0, Total=29070 [2018-07-23 15:26:38,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-07-23 15:26:38,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-07-23 15:26:38,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-07-23 15:26:38,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2018-07-23 15:26:38,886 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2018-07-23 15:26:38,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:38,886 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2018-07-23 15:26:38,886 INFO L472 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-07-23 15:26:38,887 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2018-07-23 15:26:38,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-07-23 15:26:38,887 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:38,888 INFO L353 BasicCegarLoop]: trace histogram [86, 85, 1, 1, 1] [2018-07-23 15:26:38,888 INFO L414 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:38,888 INFO L82 PathProgramCache]: Analyzing trace with hash -333688439, now seen corresponding path program 85 times [2018-07-23 15:26:38,888 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:39,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:39,813 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:26:39,814 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:39,814 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2018-07-23 15:26:39,814 INFO L450 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-07-23 15:26:39,814 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-07-23 15:26:39,815 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=7483, Unknown=0, NotChecked=0, Total=7656 [2018-07-23 15:26:39,815 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 88 states. [2018-07-23 15:26:45,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:45,881 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2018-07-23 15:26:45,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-07-23 15:26:45,881 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 174 [2018-07-23 15:26:45,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:45,882 INFO L225 Difference]: With dead ends: 179 [2018-07-23 15:26:45,882 INFO L226 Difference]: Without dead ends: 177 [2018-07-23 15:26:45,883 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3570 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=7568, Invalid=22188, Unknown=0, NotChecked=0, Total=29756 [2018-07-23 15:26:45,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-07-23 15:26:45,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-07-23 15:26:45,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-07-23 15:26:45,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2018-07-23 15:26:45,890 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2018-07-23 15:26:45,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:45,890 INFO L471 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2018-07-23 15:26:45,890 INFO L472 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-07-23 15:26:45,891 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2018-07-23 15:26:45,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-07-23 15:26:45,892 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:45,892 INFO L353 BasicCegarLoop]: trace histogram [87, 86, 1, 1, 1] [2018-07-23 15:26:45,892 INFO L414 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:45,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1448009411, now seen corresponding path program 86 times [2018-07-23 15:26:45,892 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:46,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:46,827 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:26:46,827 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:46,827 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2018-07-23 15:26:46,828 INFO L450 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-07-23 15:26:46,828 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-07-23 15:26:46,829 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=7657, Unknown=0, NotChecked=0, Total=7832 [2018-07-23 15:26:46,829 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 89 states. [2018-07-23 15:26:53,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:26:53,304 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-07-23 15:26:53,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-07-23 15:26:53,304 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 176 [2018-07-23 15:26:53,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:26:53,305 INFO L225 Difference]: With dead ends: 181 [2018-07-23 15:26:53,305 INFO L226 Difference]: Without dead ends: 179 [2018-07-23 15:26:53,306 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3655 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=7743, Invalid=22707, Unknown=0, NotChecked=0, Total=30450 [2018-07-23 15:26:53,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-07-23 15:26:53,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-07-23 15:26:53,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-07-23 15:26:53,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-07-23 15:26:53,312 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2018-07-23 15:26:53,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:26:53,313 INFO L471 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-07-23 15:26:53,313 INFO L472 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-07-23 15:26:53,313 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-07-23 15:26:53,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-07-23 15:26:53,313 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:26:53,313 INFO L353 BasicCegarLoop]: trace histogram [88, 87, 1, 1, 1] [2018-07-23 15:26:53,314 INFO L414 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:26:53,314 INFO L82 PathProgramCache]: Analyzing trace with hash -32307843, now seen corresponding path program 87 times [2018-07-23 15:26:53,314 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:26:53,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:26:54,323 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:26:54,324 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:26:54,324 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2018-07-23 15:26:54,324 INFO L450 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-07-23 15:26:54,324 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-07-23 15:26:54,325 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=7833, Unknown=0, NotChecked=0, Total=8010 [2018-07-23 15:26:54,325 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 90 states. [2018-07-23 15:27:00,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:27:00,903 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2018-07-23 15:27:00,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-07-23 15:27:00,903 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 178 [2018-07-23 15:27:00,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:27:00,904 INFO L225 Difference]: With dead ends: 183 [2018-07-23 15:27:00,904 INFO L226 Difference]: Without dead ends: 181 [2018-07-23 15:27:00,905 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3741 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=7920, Invalid=23232, Unknown=0, NotChecked=0, Total=31152 [2018-07-23 15:27:00,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-07-23 15:27:00,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-07-23 15:27:00,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-07-23 15:27:00,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2018-07-23 15:27:00,916 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 178 [2018-07-23 15:27:00,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:27:00,916 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2018-07-23 15:27:00,916 INFO L472 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-07-23 15:27:00,916 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2018-07-23 15:27:00,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-07-23 15:27:00,917 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:27:00,917 INFO L353 BasicCegarLoop]: trace histogram [89, 88, 1, 1, 1] [2018-07-23 15:27:00,917 INFO L414 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:27:00,918 INFO L82 PathProgramCache]: Analyzing trace with hash -983013961, now seen corresponding path program 88 times [2018-07-23 15:27:00,918 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:27:01,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:27:02,011 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:27:02,012 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:27:02,012 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2018-07-23 15:27:02,012 INFO L450 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-07-23 15:27:02,012 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-07-23 15:27:02,013 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=8011, Unknown=0, NotChecked=0, Total=8190 [2018-07-23 15:27:02,013 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 91 states. [2018-07-23 15:27:09,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:27:09,228 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2018-07-23 15:27:09,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-07-23 15:27:09,228 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 180 [2018-07-23 15:27:09,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:27:09,229 INFO L225 Difference]: With dead ends: 185 [2018-07-23 15:27:09,229 INFO L226 Difference]: Without dead ends: 183 [2018-07-23 15:27:09,230 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3828 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=8099, Invalid=23763, Unknown=0, NotChecked=0, Total=31862 [2018-07-23 15:27:09,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-07-23 15:27:09,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-07-23 15:27:09,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-07-23 15:27:09,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-07-23 15:27:09,236 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 180 [2018-07-23 15:27:09,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:27:09,237 INFO L471 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-07-23 15:27:09,237 INFO L472 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-07-23 15:27:09,237 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-07-23 15:27:09,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-07-23 15:27:09,237 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:27:09,237 INFO L353 BasicCegarLoop]: trace histogram [90, 89, 1, 1, 1] [2018-07-23 15:27:09,238 INFO L414 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:27:09,238 INFO L82 PathProgramCache]: Analyzing trace with hash 216440689, now seen corresponding path program 89 times [2018-07-23 15:27:09,238 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:27:09,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:27:10,246 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:27:10,246 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:27:10,246 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2018-07-23 15:27:10,247 INFO L450 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-07-23 15:27:10,247 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-07-23 15:27:10,247 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=8191, Unknown=0, NotChecked=0, Total=8372 [2018-07-23 15:27:10,248 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 92 states. [2018-07-23 15:27:17,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:27:17,466 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-07-23 15:27:17,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-07-23 15:27:17,466 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 182 [2018-07-23 15:27:17,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:27:17,467 INFO L225 Difference]: With dead ends: 187 [2018-07-23 15:27:17,467 INFO L226 Difference]: Without dead ends: 185 [2018-07-23 15:27:17,469 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3916 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=8280, Invalid=24300, Unknown=0, NotChecked=0, Total=32580 [2018-07-23 15:27:17,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-07-23 15:27:17,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-07-23 15:27:17,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-07-23 15:27:17,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2018-07-23 15:27:17,479 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 182 [2018-07-23 15:27:17,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:27:17,480 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2018-07-23 15:27:17,480 INFO L472 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-07-23 15:27:17,480 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2018-07-23 15:27:17,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-07-23 15:27:17,481 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:27:17,481 INFO L353 BasicCegarLoop]: trace histogram [91, 90, 1, 1, 1] [2018-07-23 15:27:17,481 INFO L414 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:27:17,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1841124011, now seen corresponding path program 90 times [2018-07-23 15:27:17,481 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:27:18,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:27:18,584 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:27:18,585 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:27:18,585 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2018-07-23 15:27:18,585 INFO L450 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-07-23 15:27:18,585 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-07-23 15:27:18,586 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=8373, Unknown=0, NotChecked=0, Total=8556 [2018-07-23 15:27:18,586 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 93 states. [2018-07-23 15:27:25,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:27:25,705 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2018-07-23 15:27:25,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-07-23 15:27:25,705 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 184 [2018-07-23 15:27:25,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:27:25,706 INFO L225 Difference]: With dead ends: 189 [2018-07-23 15:27:25,706 INFO L226 Difference]: Without dead ends: 187 [2018-07-23 15:27:25,707 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4005 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=8463, Invalid=24843, Unknown=0, NotChecked=0, Total=33306 [2018-07-23 15:27:25,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-07-23 15:27:25,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-07-23 15:27:25,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-07-23 15:27:25,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2018-07-23 15:27:25,714 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 184 [2018-07-23 15:27:25,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:27:25,714 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2018-07-23 15:27:25,714 INFO L472 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-07-23 15:27:25,714 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2018-07-23 15:27:25,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-07-23 15:27:25,715 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:27:25,715 INFO L353 BasicCegarLoop]: trace histogram [92, 91, 1, 1, 1] [2018-07-23 15:27:25,716 INFO L414 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:27:25,716 INFO L82 PathProgramCache]: Analyzing trace with hash -206299291, now seen corresponding path program 91 times [2018-07-23 15:27:25,716 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:27:26,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:27:26,897 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:27:26,898 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:27:26,898 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2018-07-23 15:27:26,898 INFO L450 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-07-23 15:27:26,898 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-07-23 15:27:26,899 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=8557, Unknown=0, NotChecked=0, Total=8742 [2018-07-23 15:27:26,899 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 94 states. [2018-07-23 15:27:34,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:27:34,393 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2018-07-23 15:27:34,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-07-23 15:27:34,393 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 186 [2018-07-23 15:27:34,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:27:34,394 INFO L225 Difference]: With dead ends: 191 [2018-07-23 15:27:34,394 INFO L226 Difference]: Without dead ends: 189 [2018-07-23 15:27:34,395 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4095 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=8648, Invalid=25392, Unknown=0, NotChecked=0, Total=34040 [2018-07-23 15:27:34,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-07-23 15:27:34,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-07-23 15:27:34,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-07-23 15:27:34,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2018-07-23 15:27:34,402 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 186 [2018-07-23 15:27:34,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:27:34,402 INFO L471 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2018-07-23 15:27:34,402 INFO L472 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-07-23 15:27:34,402 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2018-07-23 15:27:34,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-07-23 15:27:34,403 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:27:34,403 INFO L353 BasicCegarLoop]: trace histogram [93, 92, 1, 1, 1] [2018-07-23 15:27:34,403 INFO L414 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:27:34,403 INFO L82 PathProgramCache]: Analyzing trace with hash -685070945, now seen corresponding path program 92 times [2018-07-23 15:27:34,403 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:27:35,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:27:35,606 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:27:35,607 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:27:35,607 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94] total 94 [2018-07-23 15:27:35,607 INFO L450 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-07-23 15:27:35,607 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-07-23 15:27:35,608 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=8743, Unknown=0, NotChecked=0, Total=8930 [2018-07-23 15:27:35,608 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand 95 states. Received shutdown request... [2018-07-23 15:27:37,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-07-23 15:27:37,460 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-23 15:27:37,467 WARN L202 ceAbstractionStarter]: Timeout [2018-07-23 15:27:37,469 INFO L202 PluginConnector]: Adding new model count_by_k.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.07 03:27:37 BoogieIcfgContainer [2018-07-23 15:27:37,469 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-23 15:27:37,470 INFO L168 Benchmark]: Toolchain (without parser) took 249399.98 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 950.5 MB). Free memory was 1.5 GB in the beginning and 2.0 GB in the end (delta: -565.0 MB). Peak memory consumption was 385.6 MB. Max. memory is 7.1 GB. [2018-07-23 15:27:37,472 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 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. [2018-07-23 15:27:37,473 INFO L168 Benchmark]: Boogie Preprocessor took 50.26 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. [2018-07-23 15:27:37,473 INFO L168 Benchmark]: RCFGBuilder took 266.98 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-07-23 15:27:37,474 INFO L168 Benchmark]: TraceAbstraction took 249078.55 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 950.5 MB). Free memory was 1.5 GB in the beginning and 2.0 GB in the end (delta: -575.5 MB). Peak memory consumption was 375.0 MB. Max. memory is 7.1 GB. [2018-07-23 15:27:37,483 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.20 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. * Boogie Preprocessor took 50.26 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. * RCFGBuilder took 266.98 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 249078.55 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 950.5 MB). Free memory was 1.5 GB in the beginning and 2.0 GB in the end (delta: -575.5 MB). Peak memory consumption was 375.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 38]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 38). Cancelled while BasicCegarLoop was constructing difference of abstraction (189states) and interpolant automaton (currently 26 states, 95 states before enhancement), while PredicateComparison was comparing new predicate (quantifier-free) to 119 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 249.0s OverallTime, 93 OverallIterations, 93 TraceHistogramMax, 208.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 462 SDtfs, 0 SDslu, 8580 SDs, 0 SdLazy, 8949 SolverSat, 4185 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8674 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 8580 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125864 ImplicationChecksByTransitivity, 220.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=189occurred in iteration=92, 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: 0.8s AutomataMinimizationTime, 92 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 16.0s SatisfiabilityAnalysisTime, 21.7s InterpolantComputationTime, 8928 NumberOfCodeBlocks, 8928 NumberOfCodeBlocksAsserted, 93 NumberOfCheckSat, 8835 ConstructedInterpolants, 0 QuantifiedInterpolants, 5466429 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 93 InterpolantComputations, 1 PerfectInterpolantSequences, 0/268088 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/count_by_k.i_3.bpl_AutomizerBpl-nestedInterpolants.epf_AutomizerBpl.xml/Csv-Benchmark-0-2018-07-23_15-27-37-497.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/count_by_k.i_3.bpl_AutomizerBpl-nestedInterpolants.epf_AutomizerBpl.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-23_15-27-37-497.csv Completed graceful shutdown