| ⊦ n ∈ st ∧ ¬ n ∈ ns ∧ inv(st \ ns) ∧ st[n] = mkblock(x0 + a ' + x1, lax0 + @(m0, m1) ' + lax1, m2) ∧ # x0 = # lax0 → st[@(n, m0, m1)] = a |
# x0 = # lax0, st[n] = mkblock(x0 + a ' + x1, lax0 + @(m0, m1) ' + lax1, m2), inv(st \ ns), n ∈ st ⊦ st[@(n, m0, m1)] = a, n ∈ ns