-(*
-let eval_form phi fcs nss ps ss is_left is_right has_left has_right kind =
- let rec loop phi =
- begin match SFormula.expr phi with
- Formula.True | Formula.False -> phi
- | Formula.Atom a ->
- let p, b, q = Atom.node a in begin
- match p with
- | First_child ->
- if b == StateSet.mem q fcs then SFormula.true_ else phi
- | Next_sibling ->
- if b == StateSet.mem q nss then SFormula.true_ else phi
- | Parent | Previous_sibling ->
- if b == StateSet.mem q ps then SFormula.true_ else phi
- | Stay ->
- if b == StateSet.mem q ss then SFormula.true_ else phi
- | Is_first_child -> SFormula.of_bool (b == is_left)
- | Is_next_sibling -> SFormula.of_bool (b == is_right)
- | Is k -> SFormula.of_bool (b == (k == kind))
- | Has_first_child -> SFormula.of_bool (b == has_left)
- | Has_next_sibling -> SFormula.of_bool (b == has_right)
- 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 n = 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 i = (ltrs.TransList.id :> int)
- and j = (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, lab, phi = Transition.node trs in
- if StateSet.mem q accs then (acct, accs) else
- let new_phi =
- eval_form
- phi fcs nss ps accs
- is_left is_right has_left has_right kind
- in
- if SFormula.is_true new_phi then
- (acct, StateSet.add q accs)
- else if SFormula.is_false new_phi then
- (acct, accs)
- else
- let new_tr = Transition.make (q, lab, new_phi) in
- (TransList.cons new_tr acct, accs)
- ) ltrs (TransList.nil, ss)
- in
- Cache.N6.add auto.cache6 i j k l m n res; res
- else
- res
- in
- if new_ss == ss then res else
- loop new_ltrs new_ss
- in
- loop ltrs ss
-
-*)
-
-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 summary =
- let rec loop phi =
- begin match SFormula.expr phi with
- Formula.True | Formula.False -> phi
- | Formula.Atom a ->
- let p, b, q = Atom.node a in begin
- match p with
- | 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 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
- 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 res == old_config then res else loop res
- in
- loop ss
-
-(*
- [add_trans a q labels f] adds a transition [(q,labels) -> f] to the
- automaton [a] but ensures that transitions remains pairwise disjoint
-*)
-
-let add_trans a q s f =
- let trs = try Hashtbl.find a.transitions q with Not_found -> [] in
- let cup, ntrs =
- List.fold_left (fun (acup, atrs) (labs, phi) ->
- let lab1 = QNameSet.inter labs s in
- let lab2 = QNameSet.diff labs s in
- let tr1 =
- if QNameSet.is_empty lab1 then []
- else [ (lab1, SFormula.or_ phi f) ]
- in
- let tr2 =
- if QNameSet.is_empty lab2 then []
- else [ (lab2, SFormula.or_ phi f) ]
- in
- (QNameSet.union acup labs, tr1@ tr2 @ atrs)
- ) (QNameSet.empty, []) trs
- in
- let rem = QNameSet.diff s cup in
- let ntrs = if QNameSet.is_empty rem then ntrs
- else (rem, f) :: ntrs
- in
- Hashtbl.replace a.transitions q ntrs
-