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refactor: cleaner choice of which vector to add a clause to

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Simon Cruanes 2019-02-01 21:59:24 -06:00 • committed by Guillaume Bury
parent ba4c360cbd
commit 7891f2b69e
1 changed files with 10 additions and 5 deletions
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15
src/core/Internal.ml
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@ -1455,8 +1455,12 @@ module Make(Plugin : PLUGIN)
record_learnt_clause st confl cr
(* Get the correct vector to insert a clause in. *)
let[@inline] clause_vector st c =
if Clause.removable c then st.clauses_learnt else st.clauses_hyps
let[@inline] add_clause_to_vec st c =
if Clause.removable c then (
Vec.push st.clauses_learnt c
) else (
Vec.push st.clauses_hyps c
)
(* Add a new clause, simplifying, propagating, and backtracking if
the clause is false in the current trail *)
@ -1465,9 +1469,9 @@ module Make(Plugin : PLUGIN)
(* Insertion of new lits is done before simplification. Indeed, else a lit in a
trivial clause could end up being not decided on, which is a bug. *)
Array.iter (fun x -> insert_var_order st (Elt.of_var x.var)) init.atoms;
let vec = clause_vector st init in
try
let c = eliminate_duplicates init in
assert (c.flags = init.flags);
Log.debugf debug (fun k -> k "(@[sat.dups-removed@ %a@])" Clause.debug c);
let atoms, history = partition c.atoms in
let clause =
@ -1480,6 +1484,7 @@ module Make(Plugin : PLUGIN)
Clause.make ~flags:c.flags atoms proof
)
in
assert (clause.flags = init.flags);
Log.debugf info (fun k->k "(@[sat.new-clause@ @[<hov>%a@]@])" Clause.debug clause);
match atoms with
| [] ->
@ -1494,11 +1499,11 @@ module Make(Plugin : PLUGIN)
) else (
Log.debugf debug
(fun k->k "(@[sat.add-clause.unit-clause@ :propagating %a@])" Atom.debug a);
Vec.push vec clause;
add_clause_to_vec st clause;
enqueue_bool st a ~level:0 (Bcp clause)
)
| a::b::_ ->
Vec.push vec clause;
add_clause_to_vec st clause;
if a.neg.is_true then (
(* Atoms need to be sorted in decreasing order of decision level,
or we might watch the wrong literals. *)