X-Git-Url: http://git.nguyen.vg/gitweb/?p=tatoo.git;a=blobdiff_plain;f=src%2Fata.ml;h=df433926b41d263b3ec105f449d02b5fa043d59f;hp=08a430884b3ac88ce4a2e570b4689015c4957438;hb=41dd1fed04cabad212f10fce3484545f6e9d9444;hpb=b00bff88c7902e828804c06b7f9dc55222fdc84e diff --git a/src/ata.ml b/src/ata.ml index 08a4308..df43392 100644 --- a/src/ata.ml +++ b/src/ata.ml @@ -13,10 +13,6 @@ (* *) (***********************************************************************) -(* - Time-stamp: -*) - INCLUDE "utils.ml" open Format @@ -159,13 +155,72 @@ end = end + +type node_summary = int +let dummy_summary = -1 +(* +4444444444443210 +4 -> kind +3 -> is_left +2 -> is_right +1 -> has_left +0 -> has_right +*) + +let has_right (s : node_summary) : bool = + Obj.magic (s land 1) +let has_left (s : node_summary) : bool = + Obj.magic ((s lsr 1) land 1) + +let is_right (s : node_summary) : bool = + Obj.magic ((s lsr 2) land 1) + +let is_left (s : node_summary) : bool = + Obj.magic ((s lsr 3) land 1) + +let kind (s : node_summary ) : Tree.NodeKind.t = + Obj.magic (s lsr 4) + +let node_summary is_left is_right has_left has_right kind = + ((Obj.magic kind) lsl 4) lor + ((Obj.magic is_left) lsl 3) lor + ((Obj.magic is_right) lsl 2) lor + ((Obj.magic has_left) lsl 1) lor + (Obj.magic has_right) + + + +type config = { + sat : StateSet.t; + unsat : StateSet.t; + todo : TransList.t; + summary : node_summary; +} + +module Config = Hcons.Make(struct + type t = config + let equal c d = + c == d || + c.sat == d.sat && + c.unsat == d.unsat && + c.todo == d.todo && + c.summary == d.summary + + let hash c = + HASHINT4((c.sat.StateSet.id :> int), + (c.unsat.StateSet.id :> int), + (c.todo.TransList.id :> int), + c.summary) +end +) + type t = { id : Uid.t; mutable states : StateSet.t; mutable selection_states: StateSet.t; transitions: (State.t, (QNameSet.t*SFormula.t) list) Hashtbl.t; mutable cache2 : TransList.t Cache.N2.t; - mutable cache6 : (TransList.t*StateSet.t) Cache.N6.t; + mutable cache4 : Config.t Cache.N4.t; } let next = Uid.make_maker () @@ -174,20 +229,50 @@ let dummy2 = TransList.cons (Transition.make (State.dummy,QNameSet.empty, SFormula.false_)) TransList.nil -let dummy6 = (dummy2, StateSet.empty) -let create s ss = { id = next (); - states = s; - selection_states = ss; - transitions = Hashtbl.create 17; - cache2 = Cache.N2.create dummy2; - cache6 = Cache.N6.create dummy6; - } +let dummy_config = + Config.make { sat = StateSet.empty; + unsat = StateSet.empty; + todo = TransList.nil; + summary = dummy_summary + } + + +let create s ss = + let auto = { id = next (); + states = s; + selection_states = ss; + transitions = Hashtbl.create 17; + cache2 = Cache.N2.create dummy2; + cache4 = Cache.N4.create dummy_config; + } + in + at_exit (fun () -> + let n4 = ref 0 in + let n2 = ref 0 in + Cache.N2.iteri (fun _ _ _ b -> if b then incr n2) auto.cache2; + Cache.N4.iteri (fun _ _ _ _ _ b -> if b then incr n4) auto.cache4; + Logger.msg `STATS "automaton %i, cache2: %i entries, cache6: %i entries" + (auto.id :> int) !n2 !n4; + let c2l, c2u = Cache.N2.stats auto.cache2 in + let c4l, c4u = Cache.N4.stats auto.cache4 in + Logger.msg `STATS + "cache2: length: %i, used: %i, occupation: %f" + c2l c2u (float c2u /. float c2l); + Logger.msg `STATS + "cache4: length: %i, used: %i, occupation: %f" + c4l c4u (float c4u /. float c4l) + + ); + auto let reset a = - a.cache2 <- Cache.N2.create dummy2; - a.cache6 <- Cache.N6.create dummy6 + a.cache4 <- Cache.N4.create (Cache.N4.dummy a.cache4) + +let full_reset a = + reset a; + a.cache2 <- Cache.N2.create (Cache.N2.dummy a.cache2) let get_trans_aux a tag states = @@ -213,81 +298,83 @@ let get_trans a tag states = (states.StateSet.id :> int) trs; trs) else trs +let simplify_atom atom pos q { Config.node=config; _ } = + if (pos && StateSet.mem q config.sat) + || ((not pos) && StateSet.mem q config.unsat) then SFormula.true_ + else if (pos && StateSet.mem q config.unsat) + || ((not pos) && StateSet.mem q config.sat) then SFormula.false_ + else atom - -let eval_form phi fcs nss ps ss is_left is_right has_left has_right kind = +let eval_form phi fcs nss ps ss summary = let rec loop phi = begin match SFormula.expr phi with - Formula.True -> true - | Formula.False -> false + Formula.True | Formula.False -> phi | Formula.Atom a -> - let p, b, q = Atom.node a in - let pos = + let p, b, q = Atom.node a in begin match p with - | First_child -> StateSet.mem q fcs - | Next_sibling -> StateSet.mem q nss - | Parent | Previous_sibling -> StateSet.mem q ps - | Stay -> StateSet.mem q ss - | Is_first_child -> is_left - | Is_next_sibling -> is_right - | Is k -> k == kind - | Has_first_child -> has_left - | Has_next_sibling -> has_right - in - if is_move p && (not b) then - eprintf "Warning: Invalid negative atom %a" Atom.print a; - b == pos - | Formula.And(phi1, phi2) -> loop phi1 && loop phi2 - | Formula.Or (phi1, phi2) -> loop phi1 || loop phi2 + | First_child -> simplify_atom phi b q fcs + | Next_sibling -> simplify_atom phi b q nss + | Parent | Previous_sibling -> simplify_atom phi b q ps + | Stay -> simplify_atom phi b q ss + | Is_first_child -> SFormula.of_bool (b == (is_left summary)) + | Is_next_sibling -> SFormula.of_bool (b == (is_right summary)) + | Is k -> SFormula.of_bool (b == (k == (kind summary))) + | Has_first_child -> SFormula.of_bool (b == (has_left summary)) + | Has_next_sibling -> SFormula.of_bool (b == (has_right summary)) + end + | Formula.And(phi1, phi2) -> SFormula.and_ (loop phi1) (loop phi2) + | Formula.Or (phi1, phi2) -> SFormula.or_ (loop phi1) (loop phi2) end in loop phi -let int_of_conf is_left is_right has_left has_right kind = - ((Obj.magic kind) lsl 4) lor - ((Obj.magic is_left) lsl 3) lor - ((Obj.magic is_right) lsl 2) lor - ((Obj.magic has_left) lsl 1) lor - (Obj.magic has_right) -let eval_trans auto ltrs fcs nss ps ss is_left is_right has_left has_right kind = - let i = int_of_conf is_left is_right has_left has_right kind - and k = (fcs.StateSet.id :> int) - and l = (nss.StateSet.id :> int) - and m = (ps.StateSet.id :> int) - in - let rec loop ltrs ss = - let j = (ltrs.TransList.id :> int) - and n = (ss.StateSet.id :> int) in - let (new_ltrs, new_ss) as res = - let res = Cache.N6.find auto.cache6 i j k l m n in - if res == dummy6 then - let res = - TransList.fold (fun trs (acct, accs) -> - let q, _, phi = Transition.node trs in - if StateSet.mem q accs then (acct, accs) else - if eval_form - phi fcs nss ps accs - is_left is_right has_left has_right kind - then - (acct, StateSet.add q accs) - else - (TransList.cons trs acct, accs) - ) ltrs (TransList.nil, ss) - in - Cache.N6.add auto.cache6 i j k l m n res; res +let eval_trans auto fcs nss ps ss = + let fcsid = (fcs.Config.id :> int) in + let nssid = (nss.Config.id :> int) in + let psid = (ps.Config.id :> int) in + let rec loop old_config = + let oid = (old_config.Config.id :> int) in + let res = + let res = Cache.N4.find auto.cache4 oid fcsid nssid psid in + if res != dummy_config then res else - res + let { sat = old_sat; + unsat = old_unsat; + todo = old_todo; + summary = old_summary } = old_config.Config.node + in + let sat, unsat, removed, kept, todo = + TransList.fold + (fun trs acc -> + let q, lab, phi = Transition.node trs in + let a_sat, a_unsat, a_rem, a_kept, a_todo = acc in + if StateSet.mem q a_sat || StateSet.mem q a_unsat then acc else + let new_phi = + eval_form phi fcs nss ps old_config old_summary + in + if SFormula.is_true new_phi then + StateSet.add q a_sat, a_unsat, StateSet.add q a_rem, a_kept, a_todo + else if SFormula.is_false new_phi then + a_sat, StateSet.add q a_unsat, StateSet.add q a_rem, a_kept, a_todo + else + let new_tr = Transition.make (q, lab, new_phi) in + (a_sat, a_unsat, a_rem, StateSet.add q a_kept, (TransList.cons new_tr a_todo)) + ) old_todo (old_sat, old_unsat, StateSet.empty, StateSet.empty, TransList.nil) + in + (* States that have been removed from the todo list and not kept are now + unsatisfiable *) + let unsat = StateSet.union unsat (StateSet.diff removed kept) in + (* States that were found once to be satisfiable remain so *) + let unsat = StateSet.diff unsat sat in + let new_config = Config.make { old_config.Config.node with sat; unsat; todo; } in + Cache.N4.add auto.cache4 oid fcsid nssid psid new_config; + new_config in - if new_ss == ss then res else - loop new_ltrs new_ss + if res == old_config then res else loop res in - loop ltrs ss - - - - + loop ss (* [add_trans a q labels f] adds a transition [(q,labels) -> f] to the @@ -325,7 +412,7 @@ let _flush_str_fmt () = pp_print_flush _str_fmt (); let print fmt a = fprintf fmt - "\nInternal UID: %i@\n\ + "Internal UID: %i@\n\ States: %a@\n\ Selection states: %a@\n\ Alternating transitions:@\n" @@ -354,14 +441,15 @@ let print fmt a = in let line = Pretty.line (max_all + max_pre + 6) in let prev_q = ref State.dummy in + fprintf fmt "%s@\n" line; List.iter (fun (q, s1, s2, s3) -> - if !prev_q != q && !prev_q != State.dummy then fprintf fmt " %s\n%!" line; + if !prev_q != q && !prev_q != State.dummy then fprintf fmt "%s@\n" line; prev_q := q; - fprintf fmt " %s, %s" s1 s2; + fprintf fmt "%s, %s" s1 s2; fprintf fmt "%s" (Pretty.padding (max_pre - Pretty.length s1 - Pretty.length s2)); - fprintf fmt " %s %s@\n%!" Pretty.right_arrow s3; + fprintf fmt " %s %s@\n" Pretty.right_arrow s3; ) strs_strings; - fprintf fmt " %s\n%!" line + fprintf fmt "%s@\n" line (* [complete transitions a] ensures that for each state q @@ -396,7 +484,6 @@ let cleanup_states a = in StateSet.iter loop a.selection_states; let unused = StateSet.diff a.states !memo in - eprintf "Unused states %a\n%!" StateSet.print unused; StateSet.iter (fun q -> Hashtbl.remove a.transitions q) unused; a.states <- !memo @@ -406,10 +493,6 @@ let cleanup_states a = *) let normalize_negations auto = - eprintf "Automaton before normalize_trans:\n"; - print err_formatter auto; - eprintf "--------------------\n%!"; - let memo_state = Hashtbl.create 17 in let todo = Queue.create () in let rec flip b f =