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79 lines
1.8 KiB
OCaml
79 lines
1.8 KiB
OCaml
(*
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MSAT is free software, using the Apache license, see file LICENSE
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Copyright 2014 Guillaume Bury
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Copyright 2014 Simon Cruanes
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*)
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module Fsmt = Expr
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module Tsmt = struct
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module CC = Cc.Make(String)
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type formula = Fsmt.t
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type proof = unit
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type slice = {
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start : int;
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length : int;
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get : int -> formula;
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push : formula list -> proof -> unit;
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}
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type level = CC.t
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type res =
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| Sat of level
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| Unsat of formula list * proof
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let dummy = CC.empty
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let env = ref dummy
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let current_level () = !env
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let to_clause (a, b, l) =
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Log.debugf 10 "@[Expl : %s; %s@ %a@]"
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(fun k->k a b
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(fun out () -> List.iter (Format.fprintf out "|- %s@ ") l) ());
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let rec aux acc = function
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| [] | [_] -> acc
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| x :: ((y :: _) as r) ->
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aux (Fsmt.mk_eq x y :: acc) r
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in
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(Fsmt.mk_eq a b) :: (List.rev_map Fsmt.neg (aux [] l))
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let assume s =
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try
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for i = s.start to s.start + s.length - 1 do
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Log.debugf 10 "Propagating in th :@ @[%a@]" (fun k->k Fsmt.print (s.get i));
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match s.get i with
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| Fsmt.Prop _ -> ()
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| Fsmt.Equal (i, j) -> env := CC.add_eq !env i j
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| Fsmt.Distinct (i, j) -> env := CC.add_neq !env i j
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done;
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Sat (current_level ())
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with CC.Unsat x ->
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Log.debug 8 "Making explanation clause...";
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Unsat (to_clause x, ())
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let backtrack l = env := l
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end
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module Make(Dummy:sig end) = struct
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include Solver.Make(Fsmt)(Tsmt)(struct end)
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module Dot = Dot.Make(Proof)(struct
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let print_atom = St.print_atom
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let lemma_info () = "Proof", Some "PURPLE", []
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end)
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module Dedukti = Dedukti.Make(Proof)(struct
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let print _ _ = ()
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let prove _ _ = ()
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let context _ _ = ()
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end)
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let print_clause = St.print_clause
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let print_dot = Dot.print
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let print_dedukti = Dedukti.print
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end
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