# the affine hull of {[a,b] : a=b && 1 <= a <= 163} ...
3 4
0 1 -1 0
1 1  0 -1
1 -1 0 163

# ... is {[a,b] : a=b} (and not {[In_1,In_2]}, as Omega 1.2 claims)
1 4
0 1 -1 0