[wp] pre-conditions naming

src/plugins/wp/tests/wp_usage/oracle/caveat.0.res.oracle

@@ -165,7 +165,7 @@ Assume {
       is_sint32(x_4) /\ is_sint32(x_5) /\ is_sint32(x_6) /\ is_sint32(x_7).
   (* Heap *)
   Type: (region(a.base) <= 0) /\ (region(r.base) <= 0).
-  (* Pre-condition *)
+  (* Pre-condition 'KO' *)
   Have: P_OBS(x, x_1, x_2).
 }
 Prove: P_OBS(x_5, x_6, x_7).

src/plugins/wp/tests/wp_usage/oracle/caveat.1.res.oracle

@@ -62,7 +62,7 @@ Let x_4 = x + x_1.
 Assume {
   Type: is_sint32(r) /\ is_sint32(x) /\ is_sint32(x_1) /\ is_sint32(x_2) /\
       is_sint32(x_3) /\ is_sint32(x_4).
-  (* Pre-condition *)
+  (* Pre-condition 'KO' *)
   Have: P_OBS(x, x_1, r).
 }
 Prove: P_OBS(x_2, x_3, x_4).