clean code and repo layout

.gitignore

@@ -2,3 +2,4 @@ _build/
 _coverage/
 *.merlin
 *.out
+*.json

bench/bench.ml

@@ -1,9 +1,9 @@
-module Make2 (M: Bdd.S) = struct
+module Make2 (M: Bdd.Common.S) = struct
 
-  module M = Bdd.Make(M)
+  module M = Bdd.Common.Make(M)
 
   let rec build l r i =
-    let v = Bdd.Base.var_of_string (string_of_int i) in
+    let v = Bdd.Common.Base.var_of_string (string_of_int i) in
     if i = 1 then M.node v l r
     else
       let b = if i mod 2 = 0 then
@@ -24,9 +24,9 @@ module Make2 (M: Bdd.S) = struct
 
 end
 
-module Make (M: Bdd.S) = struct
+module Make (M: Bdd.Common.S) = struct
 
-  module M = Bdd.Make(M)
+  module M = Bdd.Common.Make(M)
 
   let bench_one tbl expr =
     let start = Unix.gettimeofday () in
@@ -50,17 +50,17 @@ end
 
 let _ =
 
-  let expr = Cli.get_expr () in
+  let expr = Expr.Cli.get_expr () in
 
   let tbl = Hashtbl.create 512 in
-  let v = Bdd.Base.var_of_string in
+  let v = Bdd.Common.Base.var_of_string in
   Hashtbl.add tbl (v "x") false;
   Hashtbl.add tbl (v "y") true;
 
-  let module I1 = Bdd_naive.Make(Memo.Fake) in
-  let module I2 = Bdd_naive.Make(Memo.Make) in
-  let module I3 = Bdd_hashcons.Make(Memo.Fake) in
-  let module I4 = Bdd_hashcons.Make(Memo.Make) in
+  let module I1 = Bdd.Naive.Make(Memo.Fake) in
+  let module I2 = Bdd.Naive.Make(Memo.Make) in
+  let module I3 = Bdd.Hashconsed.Make(Memo.Fake) in
+  let module I4 = Bdd.Hashconsed.Make(Memo.Make) in
 
   let n = 1 in
 
@@ -84,11 +84,11 @@ let _ =
  (* B3.bench_one "hashcons:       ";*)
   B4.bench_one "hashcons + memo:";
 
-  let module T = Bdd.Make(I4) in
+  let module T = Bdd.Common.Make(I4) in
   let sat = T.all_sat (T.of_expr expr) in
   List.iter (fun l -> print_endline "One sat is:";
     List.iter (fun (v, b) ->
-      Printf.printf "%s = %B\n" (Bdd.Base.string_of_var v) b
+      Printf.printf "%s = %B\n" (Bdd.Common.Base.string_of_var v) b
     ) l
   ) sat;
 

bench/dune

@@ -0,0 +1,4 @@
+(executable
+  (name bench)
+  (libraries unix bdd expr)
+  (modules bench))

scripts/landmarks.sh

@@ -0,0 +1,8 @@
+#!/bin/sh
+
+set -eu
+
+( cd "$(dirname "$0")/../"
+  eval "$(opam env)"
+  export OCAML_LANDMARKS="output=landmarks.json,format=json,allocation"
+)

scripts/numlink.sh

@@ -5,5 +5,5 @@ set -eu
 
 ( cd "$(dirname "$0")/../"
   eval "$(opam env)"
-  dune exec src/numlink.exe --profile release -- "$@"
+  dune exec src/numlink/numlink.exe --profile release -- "$@"
 )

scripts/printer.ml

@@ -1,9 +0,0 @@
-#!/bin/sh
-
-set -eu
-
-
-( cd "$(dirname "$0")/../"
-  eval "$(opam env)"
-  dune exec src/printer.exe -- "$@"
-)

src/bdd/common.ml

@@ -2,22 +2,24 @@ module Base = struct
   type var = int
   type expr = Expr.Lang.t
 
+  (* TODO *)
   let inv_tbl = Hashtbl.create 512
   let string_of_var = Hashtbl.find inv_tbl
 
-  let var_of_string, reset =
+  let var_of_string, reset, max_var =
     let tbl = Hashtbl.create 512 in
     let gen, reset = Utils.gen_tag () in
-    (fun x -> match Hashtbl.find tbl x with
-    | exception Not_found ->
+    (fun x ->
+      try Hashtbl.find tbl x
+      with Not_found ->
         let v = gen () in
-        Hashtbl.add tbl x v;
-        Printf.printf "added %s -> %d\n" x v;
-        flush stdout;
         Hashtbl.add inv_tbl v x;
-        v
-    | v -> v),
-    (fun () -> reset ())
+        Hashtbl.add tbl x v;
+        (* Printf.printf "added %s -> %d\n" x v;
+        flush stdout;*)
+        v),
+    (fun () -> reset ()),
+    (fun () -> Hashtbl.length tbl)
 end
 
 module type S = sig
@@ -57,27 +59,52 @@ module Make (M: S) = struct
 
   let var_bdd v = node v false_bdd true_bdd
 
-
-  let to_string = Mem.memo (fun to_string ->
-    fview (function
-    | True -> "true"
-    | False -> "false"
+  let to_string bdd =
+    let b = Buffer.create 512 in
+    let rec aux bdd = match view bdd with
+    | True -> Buffer.add_string b "true"
+    | False -> Buffer.add_string b "false"
     | Node (var, low, high) ->
-        (Base.string_of_var var) ^ "(" ^ string_of_int var ^ ")" ^ " ? "
-        ^ "(" ^ (to_string high) ^ ")"
-        ^ ": (" ^ (to_string low) ^ ")"))
+        Buffer.add_string b (Base.string_of_var var);
+        Buffer.add_string b ("(" ^ (string_of_int var) ^ ") ? (");
+        aux high;
+        Buffer.add_string b ") : (";
+        aux low;
+        Buffer.add_string b ")"
+    in
+    aux bdd;
+    Buffer.contents b
 
   let of_bool = function
     | true -> true_bdd
     | false -> false_bdd
 
-  let neg = Mem.memo (fun neg ->
+  let neg x = Mem.memo (fun neg ->
     fview (function
     | True -> false_bdd
     | False -> true_bdd
-    | Node (var, low, high) -> node var (neg low) (neg high)))
+    | Node (var, low, high) -> node var (neg low) (neg high))) x
 
-  let comb op = Mem.memo2 (fun comb n1 n2 ->
+  (* let rec comb_comm op n1 n2 =
+    let comb_comm = comb_comm op in *)
+  let comb_comm op x y = Mem.memo2 (fun comb_comm n1 n2 ->
+    match view n1, view n2 with
+    | Node (v1, l1, h1), Node (v2, l2, h2) when v1 = v2 ->
+        node v1 (comb_comm l1 l2) (comb_comm h1 h2)
+    | Node (v1, l1, h1), Node (v2, _, _) when v1 < v2 ->
+        node v1 (comb_comm l1 n2) (comb_comm h1 n2)
+    | Node (_, _, _), Node (v2, l2, h2) ->
+        node v2 (comb_comm n1 l2) (comb_comm n1 h2)
+    | True, Node (v, l, h) | Node (v, l, h), True ->
+        node v (comb_comm l true_bdd) (comb_comm h true_bdd)
+    | False, Node (v, l, h) | Node (v, l, h), False ->
+        node v (comb_comm l false_bdd) (comb_comm h false_bdd)
+    | False, False -> of_bool (op false false)
+    | False, True | True, False -> of_bool (op true false)
+    | True, True -> of_bool (op true true)
+    ) x y
+
+  let comb op x y = Mem.memo2 (fun comb n1 n2 ->
     match view n1, view n2 with
     | Node (v1, l1, h1), Node (v2, l2, h2) when v1 = v2 ->
         node v1 (comb l1 l2) (comb h1 h2)
@@ -96,12 +123,12 @@ module Make (M: S) = struct
     | False, False -> of_bool (op false false)
     | False, True -> of_bool (op false true)
     | True, False -> of_bool (op true false)
-    | True, True -> of_bool (op true true))
+    | True, True -> of_bool (op true true)) x y
 
-  let conj = comb (fun x y -> x && y)
-  let disj = comb (fun x y -> x || y)
+  let conj = comb_comm (fun x y -> x && y)
+  let disj = comb_comm (fun x y -> x || y)
   let imp = comb (fun x y -> (not x) || y)
-  let eq = comb (fun x y -> x = y)
+  let eq = comb_comm (fun x y -> x = y)
 
   let compute tbl =
     let compute_aux = Mem.memo (fun compute_aux ->
@@ -126,27 +153,18 @@ module Make (M: S) = struct
           E.And (E.Var (Base.string_of_var v), (to_expr l)),
           E.And (E.Neg (E.Var (Base.string_of_var v)), (to_expr h)))))
 
-  module MemoExpr = Memo.Fake(struct
-    type t = Base.expr
-    let equal = (=)
-    let hash = Hashtbl.hash
-  end)
-
-  (* TODO: call reset each time *)
-  let of_expr = MemoExpr.memo (fun of_expr ->
+  let rec of_expr =
     let module E = Expr.Lang in function
     | E.True -> true_bdd
     | E.False -> false_bdd
-    | E.Var v -> (try var_bdd (int_of_string v) with
-      | _ -> var_bdd (Base.var_of_string (E.var_to_string v)))
+    | E.Var v -> (try var_bdd (int_of_string v) with _ -> var_bdd (Base.var_of_string (E.var_to_string v)))
     | E.Neg e -> neg (of_expr e)
     | E.And (e1, e2) -> conj (of_expr e1) (of_expr e2)
     | E.Or (e1, e2) -> disj (of_expr e1) (of_expr e2)
     | E.Imp (e1, e2) -> imp (of_expr e1) (of_expr e2)
     | E.Eq (e1, e2) -> eq (of_expr e1) (of_expr e2)
-    (* TODO: there's probably a better way without having to construct the full expr *)
-    | E.BigAnd e -> of_expr (Seq.fold_left (fun acc el -> E.And (el, acc)) E.True e)
-    | E.BigOr e -> of_expr (Seq.fold_left (fun acc el -> E.Or (el, acc)) E.False e))
+    | E.BigAnd e -> Seq.fold_left (fun acc el -> conj (of_expr el) acc) true_bdd e
+    | E.BigOr e -> Seq.fold_left (fun acc el -> disj (of_expr el) acc) false_bdd e
 
   let of_string s = of_expr (Expr.Comp.from_string s)
 

src/bdd/dune

@@ -0,0 +1,5 @@
+(library
+  (name bdd)
+  (modules common hashconsed naive utils)
+  (preprocess (pps bisect_ppx -conditional landmarks.ppx --auto))
+  (libraries expr memo hashcons landmarks))

src/bdd/hashconsed.ml

@@ -6,7 +6,7 @@ module Make(M: Memo.F) = struct
   and view =
   | True
   | False
-  | Node of Bdd.Base.var * hidden * hidden
+  | Node of Common.Base.var * hidden * hidden
 
   module Hbdd = Hashcons.Make(struct
     type t = view
@@ -17,7 +17,7 @@ module Make(M: Memo.F) = struct
     let hash = function
     | True -> 1
     | False -> 0
-    | Node (v, l, r) -> 19191919 * v * l.tag * r.tag + 2
+    | Node (v, l, r) -> 19 * (19 * v + l.tag) + r.tag + 2
   end)
 
   module Hash = struct

src/bdd/naive.ml

@@ -4,7 +4,7 @@ module Make(M: Memo.F) = struct
   and view =
     | True
     | False
-    | Node of Bdd.Base.var * hidden * hidden
+    | Node of Common.Base.var * hidden * hidden
 
   module Hash = struct
     type t = hidden

src/comp.ml

@@ -1,29 +0,0 @@
-exception Stop
-
-let from_lexing buf =
-
-  match Parser.expr_final Lexer.token buf with
-  | exception Lexer.Error msg -> failwith ("lexer: " ^ msg)
-  | exception _ ->
-    let err_pos = Lexing.lexeme_start buf in
-    let err_line, line_offset = ref 1, ref 0 in
-    ( try List.iter (fun x -> if x > err_pos then raise Stop; incr err_line; line_offset := x) (Lexer.get_mem_new_line ())
-    with | Stop -> ());
-    failwith (Printf.sprintf "parser: On line %d, at offset %d, syntax error." (!err_line) (err_pos - !line_offset))
-  | res -> res
-
-let from_file f =
-
-  let chan = open_in f in
-  let buf = Lexing.from_channel chan in
-  let res = from_lexing buf in
-  close_in chan;
-  res
-
-let from_string s =
-
-  let buf = Lexing.from_string s in
-  from_lexing buf
-
-let list_to_conj =
-  List.fold_left (fun acc el -> Lang.And (el, acc)) True

src/dune

@@ -1,37 +0,0 @@
-(executable
-  (name bench)
-  (libraries unix bdd cli)
-  (modules bench))
-
-(executable
-  (name printer)
-  (libraries cli bdd expr)
-  (modules printer))
-
-(executable
-  (name numlink)
-  (libraries expr bdd)
-  (modules numlink))
-
-(library
-  (name cli)
-  (libraries expr)
-  (modules cli))
-
-(library
-  (name expr)
-  (modules lang comp parser lexer))
-
-(library
-  (name bdd)
-  (modules bdd bdd_naive bdd_hashcons hashcons utils memo)
-  (wrapped false)
-  (preprocess (pps bisect_ppx -conditional))
-  (libraries expr))
-
-(ocamllex
-  (modules lexer))
-
-(menhir
-  (modules parser)
-  (flags ("--explain" "--dump")))

src/expr/cli.ml

@@ -8,10 +8,8 @@ let get_expr () =
     ("-e", Arg.String (fun s -> e := Some s), "expression");
   ] (fun _ -> ()) "get_expr";
 
-  let module E = Expr.Comp in
-
   match !e, !f with
   | Some _, Some _ -> raise (Arg.Bad "file or expression, not both")
-  | Some e, _ -> E.from_string e
-  | _, Some f -> E.from_file f
+  | Some e, _ -> Comp.from_string e
+  | _, Some f -> Comp.from_file f
   | None, None -> raise (Arg.Bad "file or expression needed")

src/expr/comp.ml

@@ -0,0 +1,51 @@
+exception Stop
+open Lang
+
+let from_lexing buf =
+
+  match Parser.expr_final Lexer.token buf with
+  | exception Lexer.Error msg -> failwith ("lexer: " ^ msg)
+  | exception _ ->
+    let err_pos = Lexing.lexeme_start buf in
+    let err_line, line_offset = ref 1, ref 0 in
+    ( try List.iter (fun x -> if x > err_pos then raise Stop; incr err_line; line_offset := x) (Lexer.get_mem_new_line ())
+    with | Stop -> ());
+    failwith (Printf.sprintf "parser: On line %d, at offset %d, syntax error." (!err_line) (err_pos - !line_offset))
+  | res -> res
+
+let from_file f =
+
+  let chan = open_in f in
+  let buf = Lexing.from_channel chan in
+  let res = from_lexing buf in
+  close_in chan;
+  res
+
+let from_string s =
+
+  let buf = Lexing.from_string s in
+  from_lexing buf
+
+let list_to_conj l =
+  Lang.BigAnd (List.to_seq l)
+
+let rec print fmt = function
+  | True -> Format.fprintf fmt "true"
+  | False -> Format.fprintf fmt "false"
+  | Var v -> Format.fprintf fmt "@[%S@]" v
+  | Neg e -> Format.fprintf fmt "(@[NOT %a@])" print e
+  | And (e1, e2) -> Format.fprintf fmt "(@[%a AND@ %a@])" print e1 print e2
+  | Or (e1, e2) -> Format.fprintf fmt "(@[%a OR@ %a@])" print e1 print e2
+  | Imp (e1, e2) -> Format.fprintf fmt "(@[%a =>@ %a@])" print e1 print e2
+  | Eq (e1, e2) -> Format.fprintf fmt "(@[%a <=>@ %a@])" print e1 print e2
+  | BigAnd s ->
+      Format.fprintf fmt "(@[%a@])"
+      (Format.pp_print_list
+      ~pp_sep:(fun fmt -> fun () -> Format.fprintf fmt " AND@ ")
+      print)
+      (List.of_seq s)
+  | BigOr s ->
+      Format.fprintf fmt "(@[%a@])"
+      (Format.pp_print_list
+      ~pp_sep:(fun fmt -> fun () -> Format.fprintf fmt " OR@ ")
+      print) (List.of_seq s)

src/expr/dune

@@ -0,0 +1,12 @@
+(library
+  (name expr)
+  (libraries landmarks)
+  (preprocess (pps landmarks.ppx --auto))
+  (modules lang comp parser lexer cli))
+
+(ocamllex
+  (modules lexer))
+
+(menhir
+  (modules parser)
+  (flags ("--explain" "--dump")))

src/hashcons.ml

@@ -1,31 +0,0 @@
-type 'a hash_consed = {
-  node: 'a;
-  tag: int;
-}
-
-module Make(H: Hashtbl.HashedType) = struct
-
-  type key = H.t
-  type data = key hash_consed
-
-  module E = Ephemeron.K1.Make(H)
-
-  type t = data E.t
-
-  let create = E.create
-  let clear = E.clear
-  let iter = E.iter
-
-  let hashcons =
-    let gen, _ = Utils.gen_tag () in
-    fun tbl k ->
-    match E.find tbl k with
-    | exception Not_found -> (
-        let v = {
-          tag = gen ();
-          node = k;
-        } in
-        E.add tbl k v;
-        v)
-    | v -> v
-end

src/hashcons/dune

@@ -0,0 +1,6 @@
+(library
+  (name hashcons)
+  (modules hashcons)
+  (wrapped false)
+  (libraries landmarks)
+  (preprocess (pps bisect_ppx -conditional landmarks.ppx --auto)))

src/hashcons/hashcons.ml

@@ -0,0 +1,34 @@
+type 'a hash_consed = {
+  node: 'a;
+  tag: int;
+}
+
+module Make(H: Hashtbl.HashedType) = struct
+
+  type key = H.t
+  type data = key hash_consed
+
+  module E = Ephemeron.K1.Make(H)
+
+  type t = data E.t
+
+  let create n =
+    let tbl = E.create n in
+    at_exit (fun () ->
+      Format.printf "alive bindings: %d@." (E.stats_alive tbl).num_bindings;
+      E.clean tbl;
+      Format.printf "alive bindings: %d@." (E.stats_alive tbl).num_bindings);
+    tbl
+  let clear = E.clear
+  let iter = E.iter
+
+  let hashcons =
+    let gen =
+      let count = ref (-1) in
+      fun () -> incr count; !count
+    in
+    fun tbl k ->
+    try E.find tbl k with
+    | Not_found -> let v = {tag = gen (); node = k} in
+      E.add tbl k v; v
+end

src/memo/dune

@@ -0,0 +1,5 @@
+(library
+  (name memo)
+  (libraries landmarks)
+  (preprocess (pps landmarks.ppx --auto))
+  (modules memo))

src/memo/memo.ml

@@ -11,12 +11,10 @@ module Make (H: Hashtbl.HashedType) = struct
   module Hash = Hashtbl.Make(H)
   let memo ff =
     let tbl = Hash.create 512 in
-    let rec f k = match Hash.find tbl k with
-    | exception Not_found ->
-        let v = ff f k in
-        Hash.add tbl k v;
-        v
-    | v -> v
+    let rec f k =
+      try Hash.find tbl k
+      with Not_found ->
+        let v = ff f k in Hash.add tbl k v; v
     in
     f
   module Hash2 = Hashtbl.Make(struct
@@ -26,12 +24,10 @@ module Make (H: Hashtbl.HashedType) = struct
   end)
   let memo2 ff =
     let tbl = Hash2.create 512 in
-    let rec f k1 k2 = match Hash2.find tbl (k1, k2) with
-    | exception Not_found ->
-        let v = ff f k1 k2 in
-        Hash2.add tbl (k1, k2) v;
-        v
-    | v -> v
+    let rec f k1 k2 =
+      try Hash2.find tbl (k1, k2)
+      with Not_found ->
+        let v = ff f k1 k2 in Hash2.add tbl (k1, k2) v; v
     in
     f
 end

src/numlink.ml

@@ -1,241 +0,0 @@
-let empty_set () = Hashtbl.create 512
-let set_add s el = Hashtbl.add s el ()
-let set_iter f = Hashtbl.iter (fun k _ -> f k)
-let set_mem = Hashtbl.mem
-let empty_graph () = empty_set (), empty_set ()
-let add_vertex g v = set_add (fst g) v
-let add_edge g v v' = set_add (snd g) (v, v')
-let set_to_list s = List.of_seq (Hashtbl.to_seq_keys s)
-let set_length = Hashtbl.length
-
-module E = Expr.Lang
-
-let set_conj f s =
-  List.fold_left (fun acc el ->
-    E.And (f el, acc)
-  ) E.True (set_to_list s)
-
-let set_disj f s =
-  List.fold_left (fun acc el ->
-    E.Or (f el, acc)
-  ) E.False (set_to_list s)
-
-let matrix3 l1 l2 l3 =
-  List.fold_left (fun acc el ->
-    (List.fold_left (fun acc' el' ->
-        (List.fold_left (fun acc'' el'' ->
-          (el, el', el'')::acc''
-        ) [] l3) @ acc'
-    ) [] l2) @ acc
-  ) [] l1
-
-let path_pos _ = empty_set ()
-
-let pos_occupied_once_in_path _ _ = E.True
-
-let range_list n =
-
-  let res = ref [] in
-
-  for i = n - 1 downto 0 do
-    res := i::(!res)
-  done;
-
-  !res
-
-let filter_vertex s v =
-  Seq.filter (fun (el, _, _) -> el = v) s
-
-let var_to_string (v, path, pos) =
-  let v = match v with
-  | None -> "phantom"
-  | Some (vx, vy) -> Printf.sprintf "(%d,%d)" vx vy
-  in
-  Printf.sprintf "vertex %s is on path %d at pos %d" v path pos
-
-let has_vertex v x =
-  let v', _, _ = x in
-  if v = v' then E.Var (var_to_string x)
-  else E.False
-
-let has_path p x =
-  let _, p', _ = x in
-  if p = p' then E.Var (var_to_string x)
-  else E.False
-
-let has_pos p x =
-  let _, _, p'= x in
-  if p = p' then E.Var (var_to_string x)
-  else E.False
-
-let is_pos_lt n x =
-  let _, _, p = x in
-  if p < n then E.Var (var_to_string x)
-  else E.False
-
-let filter_path s p =
-  Seq.filter (fun (_, el, _) -> el = p) s
-
-let filter_pos s p =
-  Seq.filter (fun (_, _, el) -> el = p) s
-
-(* takes a seq x0 x1 ... xn and builds:
- *    ( x0 && !x1 && !x2 ... && !xn)
- * || (!x0 &&  x1 && !x2 ... && !xn)
- * || (...)
- * || (!x0 && !x1 && !x2 ... &&  xn) *)
-let one_and_only_one s =
-  E.BigOr (Seq.map (fun x ->
-    E.BigAnd (Seq.map (fun x' ->
-      let xv = E.Var (var_to_string x') in
-      if x = x' then xv else E.Neg xv
-    ) s)
-  ) s)
-
-let for_all e f =
-  E.BigAnd (Seq.map f e)
-
-let exists e f =
-  E.BigOr (Seq.map f e)
-
-let exists_unique e f =
-  E.BigOr (Seq.map (fun x ->
-    E.BigAnd (Seq.map (fun x' ->
-      if x = x' then f x else E.Neg (f x')
-    ) e)
-  ) e)
-
-let without_phantom = Seq.filter (function None -> false | _ -> true)
-
-let vertex_appears_once vars vertices =
-  for_all (vertices |> without_phantom) (fun vertex ->
-    one_and_only_one (filter_vertex vars vertex))
-
-let path_pos_occupied_once vertices paths positions =
-  for_all paths (fun path ->
-    for_all positions (fun pos ->
-      exists_unique vertices (fun vertex -> E.Var (var_to_string (vertex, path, pos)) )))
-
-let are_adjacent edges v v' = match v, v' with
-  | None, _ | _, None -> false
-  | Some v, Some v' -> set_mem edges (v, v') || set_mem edges (v', v)
-
-let path_finished paths positions n =
-  for_all paths (fun path ->
-    for_all positions (fun pos ->
-        if pos < n - 1 then
-          E.Imp (
-            E.Var (var_to_string (None, path, pos)),
-            E.Var (var_to_string (None, path, pos + 1)))
-        else E.True))
-
-let conseq_in_path_imply_adjacent paths positions vertices edges n =
-
-  for_all paths (fun path ->
-    for_all positions (fun pos ->
-      if pos < (n - 1) then begin
-        for_all (vertices |> without_phantom) (fun vertex ->
-        for_all (vertices |> without_phantom) (fun vertex' ->
-          let v1 = E.Var (var_to_string (vertex, path, pos)) in
-          let v2 = E.Var (var_to_string (vertex', path, pos + 1)) in
-          if are_adjacent edges vertex vertex' then E.True else E.Neg (E.And (v1, v2))))
-      end
-      else E.True))
-
-let check_src_dst to_connect positions n paths =
-
-  let to_connect = set_to_list to_connect in
-
-
-  for_all paths (fun i ->
-    let src, dst = List.nth to_connect i in
-    let v_src = E.Var (var_to_string (Some src, i, 0)) in
-    E.And (v_src,
-      exists positions (fun pos ->
-        let v_dst = E.Var (var_to_string (Some dst, i, pos)) in
-        E.And (v_dst, if pos < n - 1 then E.Var (var_to_string (None, i, pos +
-        1)) else E.True))
-  ))
-
-let build_expr (vertices, edges) to_connect =
-
-  (* adding the phantom vertex as None and making others Some *)
-  let vertices' = empty_set () in
-  set_iter (fun x -> set_add vertices' (Some x)) vertices;
-  set_add vertices' None;
-  let vertices = vertices' in
-
-  let k = set_length to_connect in
-  let n = set_length vertices - 1 in (* we don't count the phantom vertex ! *)
-
-  let vertices = set_to_list vertices in
-  let paths = range_list k in
-  let positions = range_list n in
-
-  let vars = matrix3 vertices paths positions in
-  let vars = List.to_seq vars in
-
-  let vertices = List.to_seq vertices in
-  let paths = List.to_seq paths in
-  let positions = List.to_seq positions in
-
-  let c1 = vertex_appears_once vars vertices in
-  let c2 = path_pos_occupied_once vertices paths positions in
-  let c3 = path_finished paths positions n in
-  let c4 = conseq_in_path_imply_adjacent paths positions vertices edges n in
-  let c5 = check_src_dst to_connect positions n paths in
-
-  Expr.Comp.list_to_conj [
-    c1;
-    c2;
-    c3;
-    c4;
-    c5;
-  ]
-
-let _ =
-
-  let graph = empty_graph () in
-  let pairs = empty_set () in
-
-  List.iter (add_vertex graph) [
-    (0, 0);
-    (0, 1);
-    (1, 0);
-    (1, 1);
-  ];
-
-  let add_edge = add_edge graph in
-
-  add_edge (0, 0) (0, 1);
-  add_edge (0, 0) (1, 0);
-  add_edge (1, 1) (0, 1);
-  add_edge (1, 1) (1, 0);
-
-  let add_pair x y = set_add pairs (x, y) in
-
-  add_pair (0, 0) (1, 0);
-  add_pair (0, 1) (1, 1);
-
-  let to_solve = build_expr graph pairs in
-
-  let module M = Bdd.Make(Bdd_hashcons.Make(Memo.Make)) in
-
-  let bdd = M.of_expr to_solve in
-
-  print_endline (M.to_string bdd);
-
-  let print_sol = List.iter (fun (n, v) -> if v then Printf.printf "%s -> %B\n"
-  (Bdd.Base.string_of_var n) v) in
-
-  (*
-  ( match M.any_sat bdd with
-  | None -> print_endline "no solution"
-  | Some sol -> List.iter (fun (n, v) -> Printf.printf "%s -> %B\n" (Bdd.Base.string_of_var n) v) sol );
-*)
-
-  List.iter ( fun l -> print_sol l; print_endline "======="
-
-  ) (M.all_sat bdd);
-
-  Printf.printf "number of sol: %d\n" (List.length (M.all_sat bdd));

src/numlink/dune

@@ -1,5 +1,7 @@
 (executable
   (name main)
+  (libraries expr bdd landmarks)
+  (preprocess (pps landmarks.ppx --auto))
   (modules main parser lexer numlink))
 
 (ocamllex

src/numlink/main.ml

@@ -42,21 +42,36 @@ let get_cli () =
   | None, None -> raise (Arg.Bad "file or expression needed")
 
 let print_parsed_list =
+  Format.printf "parsed grid is:@.";
   List.iter (fun el ->
     List.iter (function
-    | None -> print_string "x"
-    | Some i -> print_int i
-    ) el; print_endline ""
+    | None -> Format.printf "x"
+    | Some i -> Format.printf "%d" i
+    ) el; Format.printf "@."
   )
 
 let assert_correct_size = function
-  | [] | [_] -> ()
+  | [] -> ()
   | x::s ->
       let len = List.length x in
       List.iter (fun el ->
         assert ((List.length el) = len)
       ) s
 
+let assert_correct_num m =
+  let tbl = Hashtbl.create 256 in
+  List.iter (fun el ->
+    List.iter (function
+      | None -> ()
+      | Some el -> (match Hashtbl.find tbl el with
+        | exception Not_found -> Hashtbl.add tbl el 1
+        | x -> Hashtbl.replace tbl el (x + 1))
+    ) el
+  ) m;
+  Hashtbl.iter (fun _ v ->
+    assert (v = 2)
+  ) tbl
+
 let _ =
 
   let map = get_cli () in
@@ -64,6 +79,71 @@ let _ =
   print_parsed_list map;
 
   assert_correct_size map;
+  assert_correct_num map;
+
+  let height = List.length map in
+  let width = match map with
+  | [] -> failwith "invalid map size"
+  | x::_ -> List.length x
+  in
+
+  (* Format.printf "width = %d ; height = %d@." width height; *)
+
+  let tbl = Hashtbl.create 256 in
+  List.iteri (fun j el->
+    List.iteri (fun i -> function
+      | None -> ()
+      | Some el -> (match Hashtbl.find tbl el with
+        | exception Not_found -> Hashtbl.add tbl el [(i, j)]
+        | x -> Hashtbl.replace tbl el ([i, j] @ x))
+    ) el
+  ) map;
+
+  let graph = Numlink.empty_graph () in
+  let pairs = Numlink.empty_set () in
+
+  for i = 0 to width - 1 do
+    for j = 0 to height - 1 do
+      Numlink.add_vertex graph (i, j)
+    done;
+  done;
+
+  let is_in_graph (x, y) =
+    x >= 0 && y >= 0 && x < width && y < height
+  in
+
+  let add_if_in_graph p p' =
+    if is_in_graph p' then Numlink.add_edge graph p p'
+  in
+
+  for i = 0 to width - 1 do
+    for j = 0 to height - 1 do
+      add_if_in_graph (i, j) (i + 1, j);
+      add_if_in_graph (i, j) (i, j + 1)
+    done;
+  done;
+
+  Hashtbl.iter (fun _ -> function
+    | x::y::[] -> Numlink.set_add pairs (x, y)
+    | _ -> failwith "not a pair..."
+  ) tbl;
+
+  Format.printf "building the expression...@.";
+  let to_solve = Numlink.build_expr graph pairs in
+  let module M = Bdd.Common.Make(Bdd.Hashconsed.Make(Memo.Make)) in
+  Format.printf "building bdd...@.";
+  let bdd = M.of_expr to_solve in
+  Format.printf "done !@.";
+  let max_var = Bdd.Common.Base.max_var () in
+  Format.printf "size = %d ; max_var = %d@." (M.size bdd) max_var;
+  Format.printf "count_sat = %d@." (M.count_sat max_var bdd);
+
+  let res = M.any_sat bdd in
+  match res with
+  | None -> Format.printf "pas de solution@."
+  | Some l -> List.iter (fun (v, b) -> if b then Format.printf "%s@."
+  (Bdd.Common.Base.string_of_var v)) l
+  ;
 
   ()
 

src/numlink/numlink.ml

@@ -10,29 +10,6 @@ let set_length = Hashtbl.length
 
 module E = Expr.Lang
 
-let set_conj f s =
-  List.fold_left (fun acc el ->
-    E.And (f el, acc)
-  ) E.True (set_to_list s)
-
-let set_disj f s =
-  List.fold_left (fun acc el ->
-    E.Or (f el, acc)
-  ) E.False (set_to_list s)
-
-let matrix3 l1 l2 l3 =
-  List.fold_left (fun acc el ->
-    (List.fold_left (fun acc' el' ->
-        (List.fold_left (fun acc'' el'' ->
-          (el, el', el'')::acc''
-        ) [] l3) @ acc'
-    ) [] l2) @ acc
-  ) [] l1
-
-let path_pos _ = empty_set ()
-
-let pos_occupied_once_in_path _ _ = E.True
-
 let range_list n =
 
   let res = ref [] in
@@ -51,46 +28,7 @@ let var_to_string (v, path, pos) =
   | None -> "phantom"
   | Some (vx, vy) -> Printf.sprintf "(%d,%d)" vx vy
   in
-  Printf.sprintf "vertex %s is on path %d at pos %d" v path pos
-
-let has_vertex v x =
-  let v', _, _ = x in
-  if v = v' then E.Var (var_to_string x)
-  else E.False
-
-let has_path p x =
-  let _, p', _ = x in
-  if p = p' then E.Var (var_to_string x)
-  else E.False
-
-let has_pos p x =
-  let _, _, p'= x in
-  if p = p' then E.Var (var_to_string x)
-  else E.False
-
-let is_pos_lt n x =
-  let _, _, p = x in
-  if p < n then E.Var (var_to_string x)
-  else E.False
-
-let filter_path s p =
-  Seq.filter (fun (_, el, _) -> el = p) s
-
-let filter_pos s p =
-  Seq.filter (fun (_, _, el) -> el = p) s
-
-(* takes a seq x0 x1 ... xn and builds:
- *    ( x0 && !x1 && !x2 ... && !xn)
- * || (!x0 &&  x1 && !x2 ... && !xn)
- * || (...)
- * || (!x0 && !x1 && !x2 ... &&  xn) *)
-let one_and_only_one s =
-  E.BigOr (Seq.map (fun x ->
-    E.BigAnd (Seq.map (fun x' ->
-      let xv = E.Var (var_to_string x') in
-      if x = x' then xv else E.Neg xv
-    ) s)
-  ) s)
+  Printf.sprintf "%s: path %d, pos %d" v path pos
 
 let for_all e f =
   E.BigAnd (Seq.map f e)
@@ -107,14 +45,20 @@ let exists_unique e f =
 
 let without_phantom = Seq.filter (function None -> false | _ -> true)
 
-let vertex_appears_once vars vertices =
+let mk vertex path pos =
+  E.Var (var_to_string (vertex, path, pos))
+
+let vertex_appears_once vertices paths positions =
   for_all (vertices |> without_phantom) (fun vertex ->
-    one_and_only_one (filter_vertex vars vertex))
+    exists_unique paths (fun path ->
+      exists_unique positions (fun pos ->
+        mk vertex path pos)))
 
 let path_pos_occupied_once vertices paths positions =
   for_all paths (fun path ->
     for_all positions (fun pos ->
-      exists_unique vertices (fun vertex -> E.Var (var_to_string (vertex, path, pos)) )))
+      exists_unique vertices (fun vertex ->
+        mk vertex path pos)))
 
 let are_adjacent edges v v' = match v, v' with
   | None, _ | _, None -> false
@@ -123,10 +67,7 @@ let are_adjacent edges v v' = match v, v' with
 let path_finished paths positions n =
   for_all paths (fun path ->
     for_all positions (fun pos ->
-        if pos < n - 1 then
-          E.Imp (
-            E.Var (var_to_string (None, path, pos)),
-            E.Var (var_to_string (None, path, pos + 1)))
+        if pos < n - 1 then E.Imp (mk None path pos, mk None path (pos + 1))
         else E.True))
 
 let conseq_in_path_imply_adjacent paths positions vertices edges n =
@@ -136,9 +77,8 @@ let conseq_in_path_imply_adjacent paths positions vertices edges n =
       if pos < (n - 1) then begin
         for_all (vertices |> without_phantom) (fun vertex ->
         for_all (vertices |> without_phantom) (fun vertex' ->
-          let v1 = E.Var (var_to_string (vertex, path, pos)) in
-          let v2 = E.Var (var_to_string (vertex', path, pos + 1)) in
-          if are_adjacent edges vertex vertex' then E.True else E.Neg (E.And (v1, v2))))
+          if are_adjacent edges vertex vertex' then E.True
+          else E.Neg (E.And (mk vertex path pos, mk vertex' path (pos + 1)))))
       end
       else E.True))
 
@@ -146,16 +86,14 @@ let check_src_dst to_connect positions n paths =
 
   let to_connect = set_to_list to_connect in
 
-
   for_all paths (fun i ->
     let src, dst = List.nth to_connect i in
-    let v_src = E.Var (var_to_string (Some src, i, 0)) in
-    E.And (v_src,
+    E.And (mk (Some src) i 0,
       exists positions (fun pos ->
-        let v_dst = E.Var (var_to_string (Some dst, i, pos)) in
-        E.And (v_dst, if pos < n - 1 then E.Var (var_to_string (None, i, pos +
-        1)) else E.True))
-  ))
+        let v = mk (Some dst) i pos in
+        if pos < n - 1 then
+          E.And (v, mk None i (pos + 1))
+        else v)))
 
 let build_expr (vertices, edges) to_connect =
 
@@ -172,18 +110,20 @@ let build_expr (vertices, edges) to_connect =
   let paths = range_list k in
   let positions = range_list n in
 
-  let vars = matrix3 vertices paths positions in
-  let vars = List.to_seq vars in
-
   let vertices = List.to_seq vertices in
   let paths = List.to_seq paths in
   let positions = List.to_seq positions in
 
-  let c1 = vertex_appears_once vars vertices in
+  let c1 = vertex_appears_once vertices paths positions in
+  (*Expr.Comp.print (Format.formatter_of_out_channel stdout) c1;*)
   let c2 = path_pos_occupied_once vertices paths positions in
+  (*Expr.Comp.print (Format.formatter_of_out_channel stdout) c2;*)
   let c3 = path_finished paths positions n in
+  (*Expr.Comp.print (Format.formatter_of_out_channel stdout) c3;*)
   let c4 = conseq_in_path_imply_adjacent paths positions vertices edges n in
+  (*Expr.Comp.print (Format.formatter_of_out_channel stdout) c4;*)
   let c5 = check_src_dst to_connect positions n paths in
+  (*Expr.Comp.print (Format.formatter_of_out_channel stdout) c5;*)
 
   Expr.Comp.list_to_conj [
     c1;
@@ -192,51 +132,3 @@ let build_expr (vertices, edges) to_connect =
     c4;
     c5;
   ]
-
-let _ =
-
-  let graph = empty_graph () in
-  let pairs = empty_set () in
-
-  List.iter (add_vertex graph) [
-    (0, 0);
-    (0, 1);
-    (1, 0);
-    (1, 1);
-  ];
-
-  let add_edge = add_edge graph in
-
-  add_edge (0, 0) (0, 1);
-  add_edge (0, 0) (1, 0);
-  add_edge (1, 1) (0, 1);
-  add_edge (1, 1) (1, 0);
-
-  let add_pair x y = set_add pairs (x, y) in
-
-  add_pair (0, 0) (1, 0);
-  add_pair (0, 1) (1, 1);
-
-  let to_solve = build_expr graph pairs in
-
-  let module M = Bdd.Make(Bdd_hashcons.Make(Memo.Make)) in
-
-  let bdd = M.of_expr to_solve in
-
-  print_endline (M.to_string bdd);
-
-  let print_sol = List.iter (fun (n, v) -> if v then Printf.printf "%s -> %B\n"
-  (Bdd.Base.string_of_var n) v) in
-
-  (*
-  ( match M.any_sat bdd with
-  | None -> print_endline "no solution"
-  | Some sol -> List.iter (fun (n, v) -> Printf.printf "%s -> %B\n" (Bdd.Base.string_of_var n) v) sol );
-*)
-
-  List.iter ( fun l -> print_sol l; print_endline "======="
-
-  ) (M.all_sat bdd);
-
-
-  Printf.printf "number of sol: %d\n" (List.length (M.all_sat bdd));

src/printer.ml

@@ -1,9 +0,0 @@
-let _ =
-
-  let expr = Cli.get_expr () in
-
-  let module I = Bdd.Make(Bdd_naive.Make(Memo.Make)) in
-
-  print_endline (I.to_string (I.of_expr expr));
-
-  Printf.printf "%d\n" (I.count_sat 2 (I.of_expr expr))

test10.numlink

@@ -0,0 +1 @@
+1xxxxxxxx1

test11.numlink

@@ -0,0 +1,2 @@
+1x1
+2x2

test2.numlink

@@ -0,0 +1,2 @@
+1xxxx
+xxxx1

test3.numlink

@@ -0,0 +1,2 @@
+1xx
+xx1

test4.numlink

@@ -0,0 +1 @@
+1x1

test5.numlink

@@ -0,0 +1 @@
+11

test6.numlink

@@ -0,0 +1,4 @@
+123
+xx3
+xxx
+x12

test7.numlink

@@ -0,0 +1,3 @@
+1xx
+xxx
+xx1

tests/test.txt

@@ -1,667 +0,0 @@
-(0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y)))
-&& (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1
-&& (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x
-&& y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y)))
-&& (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1
-&& (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x
-&& y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y)))
-&& (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1
-&& (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x
-&& y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y)))
-
-&& (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1
-&& (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x
-&& y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y)))
-&& (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1
-&& (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x
-&& y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y)))
-&& (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1
-&& (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x
-&& y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y)))
-
-&& (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1
-&& (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x
-&& y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y)))
-&& (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1
-&& (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x
-&& y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y)))
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-&& (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x
-&& y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y)))
-&& (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1
-&& (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x
-&& y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y)))
-&& (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1
-&& (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x
-&& y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y)))
-&& (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1
-&& (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x
-&& y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y)))
-&& (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1
-&& (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x
-&& y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y)))
-&& (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1
-&& (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x
-&& y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y)))
-&& (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1
-&& (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x
-&& y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y)))
-&& (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1
-&& (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x
-&& y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y)))
-&& (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1
-&& (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x
-&& y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y)))
-&& (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1
-&& (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x
-&& y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y))) && (0 || (x && y) || (1 && (x || y)))

tests/test2.txt

@@ -1,96 +0,0 @@
-   (!(((!(x && y)) || (!(x || y)))
-&& (!((!(x && y)) || (!(x || y))))))
-&& (!(((!(x && y)) || (!(x || y)))
-&& (!((!(x && y)) || (!(x || y))))))
-&& (!(((!(x && y)) || (!(x || y)))
-&& (!((!(x && y)) || (!(x || y))))))
-&& (!(((!(x && y)) || (!(x || y)))
-&& (!((!(x && y)) || (!(x || y))))))
-&& (!(((!(x && y)) || (!(x || y)))
-&& (!((!(x && y)) || (!(x || y))))))
-&& (!(((!(x && y)) || (!(x || y)))
-&& (!((!(x && y)) || (!(x || y))))))
-&& (!(((!(x && y)) || (!(x || y)))
-&& (!((!(x && y)) || (!(x || y))))))
-&& (!(((!(x && y)) || (!(x || y)))
-&& (!((!(x && y)) || (!(x || y))))))
-&& (!(((!(x && y)) || (!(x || y)))
-&& (!((!(x && y)) || (!(x || y))))))
-&& (!(((!(x && y)) || (!(x || y)))
-&& (!((!(x && y)) || (!(x || y))))))
-&& (!(((!(x && y)) || (!(x || y)))
-&& (!((!(x && y)) || (!(x || y))))))
-&& (!(((!(x && y)) || (!(x || y)))
-&& (!((!(x && y)) || (!(x || y))))))
-&& (!(((!(x && y)) || (!(x || y)))
-&& (!((!(x && y)) || (!(x || y))))))
-&& (!(((!(x && y)) || (!(x || y)))
-&& (!((!(x && y)) || (!(x || y))))))
-&& (!(((!(x && y)) || (!(x || y)))
-&& (!((!(x && y)) || (!(x || y))))))
-&& (!(((!(x && y)) || (!(x || y)))
-&& (!((!(x && y)) || (!(x || y))))))
-&& (!(((!(x && y)) || (!(x || y)))
-&& (!((!(x && y)) || (!(x || y))))))
-&& (!(((!(x && y)) || (!(x || y)))
-&& (!((!(x && y)) || (!(x || y))))))
-&& (!(((!(x && y)) || (!(x || y)))
-&& (!((!(x && y)) || (!(x || y))))))
-&& (!(((!(x && y)) || (!(x || y)))
-&& (!((!(x && y)) || (!(x || y))))))
-&& (!(((!(x && y)) || (!(x || y)))
-&& (!((!(x && y)) || (!(x || y))))))
-&& (!(((!(x && y)) || (!(x || y)))
-&& (!((!(x && y)) || (!(x || y))))))
-&& (!(((!(x && y)) || (!(x || y)))
-&& (!((!(x && y)) || (!(x || y))))))
-&& (!(((!(x && y)) || (!(x || y)))
-&& (!((!(x && y)) || (!(x || y))))))
-&& (!(((!(x && y)) || (!(x || y)))
-&& (!((!(x && y)) || (!(x || y))))))
-&& (!(((!(x && y)) || (!(x || y)))
-&& (!((!(x && y)) || (!(x || y))))))
-&& (!(((!(x && y)) || (!(x || y)))
-&& (!((!(x && y)) || (!(x || y))))))
-&& (!(((!(x && y)) || (!(x || y)))
-&& (!((!(x && y)) || (!(x || y))))))
-&& (!(((!(x && y)) || (!(x || y)))
-&& (!((!(x && y)) || (!(x || y))))))
-&& (!(((!(x && y)) || (!(x || y)))
-&& (!((!(x && y)) || (!(x || y))))))
-&& (!(((!(x && y)) || (!(x || y)))
-&& (!((!(x && y)) || (!(x || y))))))
-&& (!(((!(x && y)) || (!(x || y)))
-&& (!((!(x && y)) || (!(x || y))))))
-&& (!(((!(x && y)) || (!(x || y)))
-&& (!((!(x && y)) || (!(x || y))))))
-&& (!(((!(x && y)) || (!(x || y)))
-&& (!((!(x && y)) || (!(x || y))))))
-&& (!(((!(x && y)) || (!(x || y)))
-&& (!((!(x && y)) || (!(x || y))))))
-&& (!(((!(x && y)) || (!(x || y)))
-&& (!((!(x && y)) || (!(x || y))))))
-&& (!(((!(x && y)) || (!(x || y)))
-&& (!((!(x && y)) || (!(x || y))))))
-&& (!(((!(x && y)) || (!(x || y)))
-&& (!((!(x && y)) || (!(x || y))))))
-&& (!(((!(x && y)) || (!(x || y)))
-&& (!((!(x && y)) || (!(x || y))))))
-&& (!(((!(x && y)) || (!(x || y)))
-&& (!((!(x && y)) || (!(x || y))))))
-&& (!(((!(x && y)) || (!(x || y)))
-&& (!((!(x && y)) || (!(x || y))))))
-&& (!(((!(x && y)) || (!(x || y)))
-&& (!((!(x && y)) || (!(x || y))))))
-&& (!(((!(x && y)) || (!(x || y)))
-&& (!((!(x && y)) || (!(x || y))))))
-&& (!(((!(x && y)) || (!(x || y)))
-&& (!((!(x && y)) || (!(x || y))))))
-&& (!(((!(x && y)) || (!(x || y)))
-&& (!((!(x && y)) || (!(x || y))))))
-&& (!(((!(x && y)) || (!(x || y)))
-&& (!((!(x && y)) || (!(x || y))))))
-&& (!(((!(x && y)) || (!(x || y)))
-&& (!((!(x && y)) || (!(x || y))))))
-&& (!(((!(x && y)) || (!(x || y)))
-&& (!((!(x && y)) || (!(x || y))))))

tests/tests.ml

@@ -1,11 +1,11 @@
-module Make (M: Bdd.S) = struct
+module Make (M: Bdd.Common.S) = struct
 
-  module M = Bdd.Make(M)
+  module M = Bdd.Common.Make(M)
 
   let test s =
     let tbl = Hashtbl.create 32 in
-    Hashtbl.add tbl (Bdd.Base.var_of_string "t") true;
-    Hashtbl.add tbl (Bdd.Base.var_of_string "f") false;
+    Hashtbl.add tbl (Bdd.Common.Base.var_of_string "t") true;
+    Hashtbl.add tbl (Bdd.Common.Base.var_of_string "f") false;
 
     let compute x = M.to_string(M.compute tbl (M.of_string x)) in
 
@@ -65,11 +65,11 @@ module Make (M: Bdd.S) = struct
     in
 
     let aux f x =
-      List.map (fun x -> Bdd.Base.reset (); x, `Quick, f x) x
+      List.map (fun x -> Bdd.Common.Base.reset (); x, `Quick, f x) x
     in
 
     let aux2 f x =
-      List.map (fun (x, y) -> Bdd.Base.reset (); (x ^ " " ^ y, `Quick, f (x, y))) x
+      List.map (fun (x, y) -> Bdd.Common.Base.reset (); (x ^ " " ^ y, `Quick, f (x, y))) x
     in
 
     let neg el = "!(" ^ el ^ ")" in
@@ -150,10 +150,10 @@ end
 
 let _ =
 
-  let module T1 = Make(Bdd_naive.Make(Memo.Fake)) in
-  let module T2 = Make(Bdd_naive.Make(Memo.Make)) in
-  let module T3 = Make(Bdd_hashcons.Make(Memo.Fake)) in
-  let module T4 = Make(Bdd_hashcons.Make(Memo.Make)) in
+  let module T1 = Make(Bdd.Naive.Make(Memo.Fake)) in
+  let module T2 = Make(Bdd.Naive.Make(Memo.Make)) in
+  let module T3 = Make(Bdd.Hashconsed.Make(Memo.Fake)) in
+  let module T4 = Make(Bdd.Hashconsed.Make(Memo.Make)) in
 
   T1.test "Naïve";
   T2.test "Naïve + Memoïzation";