Definition bc_incr (bc1 bc2: block_classification) : Prop :=
forall b, bc1 b <> BCinvalid -> bc2 b = bc1 b.
Section MATCH_INCR.
Variables bc1 bc2: block_classification.
Hypothesis INCR: bc_incr bc1 bc2.

Lemma vmatch_incr: forall v x, vmatch bc1 v x -> vmatch bc2 v x.