let theory_of (sym, _) =
match sym with
| Uninterp _ -> Th.u
| Arith _ -> Th.la
| Product _ -> Th.p
| Bv _ -> Th.bv
| Coproduct _ -> Th.cop
| Arrays _ -> Th.arr
| Pp _ -> Th.nl
| Cl _ -> Th.app
| Propset _ -> Th.set