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Fix for uip unit clause which conflicts with level0

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This commit is contained in:
Guillaume Bury 2015-01-26 15:01:26 +01:00
parent 23a3b3e72d
commit ccebc8c44a
2 changed files with 14 additions and 10 deletions
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4
Makefile
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@ -23,8 +23,8 @@ build-test:
$(COMP) $(FLAGS) $(DIRS) $(TEST) $(COMP) $(FLAGS) $(DIRS) $(TEST)
test: build-test test: build-test
@./tests/run smt @/usr/bin/time -f "%e" ./tests/run smt
@./tests/run mcsat @/usr/bin/time -f "%e" ./tests/run mcsat
bench: build-test bench: build-test
cd bench && $(MAKE) cd bench && $(MAKE)

8
solver/mcsolver.ml
View file

@ -415,17 +415,21 @@ module Make (L : Log_intf.S)(E : Expr_intf.S)
List.iter (fun q -> q.var.seen <- false) !seen; List.iter (fun q -> q.var.seen <- false) !seen;
*) *)
let record_learnt_clause blevel learnt history is_uip = let record_learnt_clause confl blevel learnt history is_uip =
begin match learnt with begin match learnt with
| [] -> assert false | [] -> assert false
| [fuip] -> | [fuip] ->
assert (blevel = 0); assert (blevel = 0);
if fuip.neg.is_true then
report_unsat confl
else begin
fuip.var.tag.vpremise <- history; fuip.var.tag.vpremise <- history;
let name = fresh_lname () in let name = fresh_lname () in
let uclause = make_clause name learnt (List.length learnt) true history in let uclause = make_clause name learnt (List.length learnt) true history in
L.debug 2 "Unit clause learnt : %a" St.pp_clause uclause; L.debug 2 "Unit clause learnt : %a" St.pp_clause uclause;
Vec.push env.learnts uclause; Vec.push env.learnts uclause;
enqueue_bool fuip 0 (Bcp (Some uclause)) enqueue_bool fuip 0 (Bcp (Some uclause))
end
| fuip :: _ -> | fuip :: _ ->
let name = fresh_lname () in let name = fresh_lname () in
let lclause = make_clause name learnt (List.length learnt) true history in let lclause = make_clause name learnt (List.length learnt) true history in
@ -449,7 +453,7 @@ module Make (L : Log_intf.S)(E : Expr_intf.S)
if decision_level() = 0 then report_unsat confl; (* Top-level conflict *) if decision_level() = 0 then report_unsat confl; (* Top-level conflict *)
let blevel, learnt, history, is_uip = analyze confl in let blevel, learnt, history, is_uip = analyze confl in
cancel_until blevel; cancel_until blevel;
record_learnt_clause blevel learnt (History history) is_uip record_learnt_clause confl blevel learnt (History history) is_uip
(* Add a new clause *) (* Add a new clause *)
exception Trivial exception Trivial