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fix: use standard = even for LRA terms

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the LRA_view is only useful for views, but we build =/neq using builtin
=
This commit is contained in:
Simon Cruanes 2022-08-28 00:20:06 -04:00
parent 28ad97d2b7
commit 83a4ae46c1
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GPG key ID: EBFFF6F283F3A2B4
1 changed files with 16 additions and 5 deletions
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21
src/base/LRA_term.ml
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@ -12,8 +12,8 @@ module Pred = struct
let to_string = function
| Lt -> "<"
| Leq -> "<="
| Neq -> "!="
| Eq -> "="
| Neq -> "!=_LRA"
| Eq -> "=_LRA"
| Gt -> ">"
| Geq -> ">="
@ -127,9 +127,13 @@ let mult_by tst q t : term =
Term.app tst c t
let pred tst p t1 t2 : term =
let ty = Term.(arrow_l tst [ real tst; real tst ] (Term.bool tst)) in
let p = Term.const tst (Const.make (Pred p) ops ~ty) in
Term.app_l tst p [ t1; t2 ]
match p with
| Pred.Eq -> T.eq tst t1 t2
| Pred.Neq -> T.not tst (T.eq tst t1 t2)
| _ ->
let ty = Term.(arrow_l tst [ real tst; real tst ] (Term.bool tst)) in
let p = Term.const tst (Const.make (Pred p) ops ~ty) in
Term.app_l tst p [ t1; t2 ]
let leq tst a b = pred tst Pred.Leq a b
let lt tst a b = pred tst Pred.Lt a b
@ -151,6 +155,13 @@ let view (t : term) : _ View.t =
match T.view f, args with
| T.E_const { Const.c_view = T.C_eq; _ }, [ _; a; b ] when has_ty_real a ->
View.LRA_pred (Pred.Eq, a, b)
| T.E_const { Const.c_view = T.C_not; _ }, [ u ] ->
(* might be not-eq *)
let f, args = Term.unfold_app u in
(match T.view f, args with
| T.E_const { Const.c_view = T.C_eq; _ }, [ _; a; b ] when has_ty_real a ->
View.LRA_pred (Pred.Neq, a, b)
| _ -> View.LRA_other t)
| T.E_const { Const.c_view = Const q; _ }, [] -> View.LRA_const q
| T.E_const { Const.c_view = Pred p; _ }, [ a; b ] -> View.LRA_pred (p, a, b)
| T.E_const { Const.c_view = Op op; _ }, [ a; b ] -> View.LRA_op (op, a, b)