def tr.append_eq
import bend-osdev-cipher-modes@0.1.0.0/PROOF.bend as PROOFimport Base
import bend-osdev-cipher-modes@0.1.0.0/cipher_modes.bend as M
903def tr.append_eq(+xs: List<&2, M.CmBlock>, +ys: List<&2, M.CmBlock>) -> {List.append(&2, M.CmBlock, xs, ys) == M.cm.blocks.append(xs, ys) : List<&2, M.CmBlock>}:
904 Equal.sym(List<&2, M.CmBlock>, M.cm.blocks.append(xs, ys), List.append(&2, M.CmBlock, xs, ys), tr.rr(xs, Nil{}, ys))