| ⊦ is-encoded(nodeheader(# buf0, true), buf1) ∧ is-aligned(# buf0, 2 * NODE_HEADER_SIZE) → abs-padding(buf1 + buf0 + validtrailer) |
is-aligned(# buf0, 2 * NODE_HEADER_SIZE), is-encoded(nodeheader(# buf0, true), buf1) ⊦ abs-padding(buf1 + buf0 + validtrailer)