[m, n] -> { s0[1, In_2, In_3, 0] -> [1, In_2, In_3, 0] : In_3 >= 1 and In_3 <= m and In_2 >= 1 and In_2 <= n }
{  :  }
[m, n] -> { [i0, i1, i2, i3] -> separate[o0] : o0 >= 3; [i0, i1, i2, i3] -> atomic[o0] : o0 <= 2 }