| UAS | Language.Fixpoint.Types.Config |
| Ueq | Language.Fixpoint.Types.Refinements, Language.Fixpoint.Types |
| UeqAllSorts | Language.Fixpoint.Types.Config |
| ueqAllSorts | Language.Fixpoint.Types.Config |
| uexprReft | Language.Fixpoint.Types.Refinements, Language.Fixpoint.Types |
| unconsSym | Language.Fixpoint.Types.Names, Language.Fixpoint.Types |
| Une | Language.Fixpoint.Types.Refinements, Language.Fixpoint.Types |
| unify | Language.Fixpoint.SortCheck |
| unifyFast | Language.Fixpoint.SortCheck |
| unionIBindEnv | Language.Fixpoint.Types.Environments, Language.Fixpoint.Types |
| unionSEnv | Language.Fixpoint.Types.Environments, Language.Fixpoint.Types |
| Unknown | Language.Fixpoint.Smt.Types, Language.Fixpoint.Smt.Interface |
| unLitSymbol | Language.Fixpoint.Types.Names, Language.Fixpoint.Types |
| Unsafe | Language.Fixpoint.Types.Errors, Language.Fixpoint.Types |
| Unsat | Language.Fixpoint.Smt.Types, Language.Fixpoint.Smt.Interface |
| unsatCandidates | Language.Fixpoint.Solver.Worklist |
| update | Language.Fixpoint.Solver.Solution |
| upperIdP | Language.Fixpoint.Parse |
| usymbolReft | Language.Fixpoint.Types.Refinements, Language.Fixpoint.Types |