The realization space is
  [1   1   0   0   1   1              0              x1 - x2   -x1^2 + 2*x1*x2 + x1 - x2^2 - x2                       x1*x2 - x1 - x2^2 + x2              x1 - x2]
  [0   1   1   0   0   1   -x1 + x2 + 1   -x1^2 + x1*x2 + x1                 -x1^2 + x1*x2 + x1   -x1^3 + x1^2*x2 + x1^2 + x1*x2 - x1 - x2^2   -x1^2 + x1*x2 + x1]
  [0   0   0   1   1   1        x1 - x2         x1^2 - x1*x2                       x1*x2 - x2^2             x1^2*x2 - x1^2 - x1*x2^2 + x1*x2         x1*x2 - x2^2]
in the multivariate polynomial ring in 2 variables over ZZ
avoiding the zero loci of the polynomials
RingElem[x1 - x2, x1^2 - x1 - x2^2, x1^2 - x1*x2 - x2, x1, x1^2 - 2*x1*x2 + x1 + x2^2 - x2 - 1, x2, x1 - x2 - 1, x1 - x2 + 1, x2 - 1, x1^2 - 2*x1*x2 + x2^2 - x2, x1^2 - x1*x2 - 1, x1 - 1, x1^2 - x1 - x2, x1^3 - 2*x1^2*x2 + x1*x2^2 - x1 + 1, x1^3 - x1^2*x2 - x1^2 - x1*x2 + x1 + x2^2, x1^3 - 2*x1^2*x2 + x1*x2^2 - x1*x2 + x2, 2*x1 - 2*x2 - 1]