let metasenv' = (fresh_meta,context,a_eq_b)::metasenv in
debug("chamo rewrite tac su"^CicPp.ppterm (C.Meta (fresh_meta,irl)));
let (proof,goals) = apply_tactic
let metasenv' = (fresh_meta,context,a_eq_b)::metasenv in
debug("chamo rewrite tac su"^CicPp.ppterm (C.Meta (fresh_meta,irl)));
let (proof,goals) = apply_tactic