The realization space is
  [1   1   0   0   1   1                      0                 x2 - 1                                    x1*x2 - x1    1    1]
  [0   1   1   0   0   1             x1*x2 - x1             x1*x2 - x1    x1^2*x2 + x1^2*x3 - 2*x1^2 + x1*x2 - x1*x3   x1   x2]
  [0   0   0   1   1   1   x1*x3 - x1 + x2 - x3   x1*x3 - x1 + x2 - x3   x1*x2*x3 + x1*x3^2 - 2*x1*x3 + x2*x3 - x3^2   x3   x3]
in the multivariate polynomial ring in 3 variables over ZZ
within the vanishing set of the ideal
Ideal with 1 generator
avoiding the zero loci of the polynomials
RingElem[x1 - x2, x3, x3 - 1, x1^2*x2*x3 - x1^2*x2 + x1^2*x3^2 - 3*x1^2*x3 + 2*x1^2 - x1*x2^2*x3 + x1*x2^2 - x1*x2*x3^2 + 3*x1*x2*x3 - 2*x1*x2 - x2^2*x3 + x2*x3^2 + x2*x3 - x3^2, x1*x3 - x1 + x2 - x3, x1*x2 + x1*x3 - 2*x1 + x2 - x3, x1^2*x2 + x1^2*x3 - 2*x1^2 - x1*x2^2 - x1*x2*x3 + 3*x1*x2 - x1 - x2^2 + x2*x3 + x2 - x3, x1*x2 + x1*x3 - 2*x1 - x2^2 + 2*x2 - x3, x1^2*x2*x3 - x1^2*x2 + x1^2*x3^2 - 3*x1^2*x3 + 2*x1^2 - x1*x2^2*x3 + x1*x2^2 - x1*x2*x3^2 + 3*x1*x2*x3 - 2*x1*x2 - x1*x3^2 + x1*x3 - x2^2*x3 + x2*x3^2, x1^3*x2^2*x3 - x1^3*x2^2 + 2*x1^3*x2*x3^2 - 6*x1^3*x2*x3 + 4*x1^3*x2 + x1^3*x3^3 - 5*x1^3*x3^2 + 8*x1^3*x3 - 4*x1^3 - 2*x1^2*x2^3*x3 + 2*x1^2*x2^3 - 3*x1^2*x2^2*x3^2 + 11*x1^2*x2^2*x3 - 8*x1^2*x2^2 - x1^2*x2*x3^3 + 6*x1^2*x2*x3^2 - 13*x1^2*x2*x3 + 8*x1^2*x2 - x1^2*x3^3 + 3*x1^2*x3^2 - 2*x1^2*x3 + x1*x2^4*x3 - x1*x2^4 + x1*x2^3*x3^2 - 6*x1*x2^3*x3 + 4*x1*x2^3 - x1*x2^2*x3^2 + 8*x1*x2^2*x3 - 4*x1*x2^2 + x1*x2*x3^3 - 3*x1*x2*x3^2 - x1*x2*x3 + x1*x3 + x2^4*x3 - x2^3*x3^2 - 3*x2^3*x3 + 3*x2^2*x3^2 + 3*x2^2*x3 - 3*x2*x3^2 - x2*x3 + x3^2, x2 - x3, x1^2*x2*x3 - x1^2*x2 + x1^2*x3^2 - 3*x1^2*x3 + 2*x1^2 - x1*x2^2*x3 + x1*x2^2 - x1*x2*x3^2 + 3*x1*x2*x3 - 2*x1*x2 - x1*x3^2 + 2*x1*x3 - x1 - x2^2*x3 + x2*x3^2 + x2*x3 - x3^2, x1^2*x2^2*x3 - x1^2*x2^2 + x1^2*x2*x3^2 - 3*x1^2*x2*x3 + 2*x1^2*x2 - x1*x2^3*x3 + x1*x2^3 - x1*x2^2*x3^2 + 3*x1*x2^2*x3 - 2*x1*x2^2 - x1*x2*x3^2 + x1*x2*x3 + x1*x3^2 - x1*x3 - x2^3*x3 + x2^2*x3^2 + x2^2*x3 - x2*x3^2, x1^2*x2*x3 - x1^2*x2 + x1^2*x3^2 - 3*x1^2*x3 + 2*x1^2 - x1*x2^2*x3 + x1*x2^2 - x1*x2*x3^2 + 3*x1*x2*x3 - 2*x1*x2 - x1*x3^2 + x1*x3 - x2^2*x3 + x2*x3^2 + x2*x3 - x3^2, x1^2*x2^2*x3 - x1^2*x2^2 + x1^2*x2*x3^2 - 3*x1^2*x2*x3 + 2*x1^2*x2 - x1*x2^3*x3 + x1*x2^3 - x1*x2^2*x3^2 + 3*x1*x2^2*x3 - 2*x1*x2^2 - x1*x2*x3^2 + 2*x1*x2*x3 - x1*x2 + x1*x3^2 - 2*x1*x3 + x1 - x2^3*x3 + x2^2*x3^2 + x2^2*x3 - x2*x3^2, x2 - 1, x2, x2 + x3 - 1, x1 - x3, x1^2*x2*x3 - x1^2*x2 + x1^2*x3^2 - 3*x1^2*x3 + 2*x1^2 - x1*x2^2*x3 + x1*x2^2 - x1*x2*x3^2 + 3*x1*x2*x3 - 2*x1*x2 - x2^2*x3 + 2*x2*x3 - x3, x1, x1 - 1, x1^3*x2*x3 - x1^3*x2 + x1^3*x3^2 - 3*x1^3*x3 + 2*x1^3 - x1^2*x2^2*x3 + x1^2*x2^2 - x1^2*x2*x3^2 + 2*x1^2*x2*x3 - x1^2*x2 - x1^2*x3^2 + 3*x1^2*x3 - 2*x1^2 - x1*x2^2 + x1*x2*x3^2 - x1*x2*x3 + 2*x1*x2 - x1*x3 + x2^2*x3 - x2*x3^2 - x2*x3 + x3^2, x1^2*x2*x3 - x1^2*x2 + x1^2*x3^2 - 3*x1^2*x3 + 2*x1^2 - x1*x2^2*x3 + x1*x2^2 - x1*x2*x3^2 + 3*x1*x2*x3 - 2*x1*x2 - x2^2*x3 + 3*x2*x3 - x2 - 2*x3 + 1, x1^3*x2*x3 - x1^3*x2 + x1^3*x3^2 - 3*x1^3*x3 + 2*x1^3 - x1^2*x2^2*x3 + x1^2*x2^2 - x1^2*x2*x3^2 + 2*x1^2*x2*x3 - x1^2*x2 - x1^2*x3^2 + 3*x1^2*x3 - 2*x1^2 - x1*x2^2 + x1*x2*x3^2 + x1*x2 - 2*x1*x3 + x1 + x2^2*x3 - x2*x3^2 - x2*x3 + x3^2, x1 + x3 - 1, x1^3*x2*x3 - x1^3*x2 + x1^3*x3^2 - 3*x1^3*x3 + 2*x1^3 - x1^2*x2^2*x3 + x1^2*x2^2 - x1^2*x2*x3^2 + 3*x1^2*x2*x3 - 2*x1^2*x2 - x1^2*x3^2 + 2*x1^2*x3 - x1^2 + 2*x1*x2*x3^2 - 3*x1*x2*x3 + x1*x2 - x1*x3^2 + x1*x3 + x2^2*x3 - x2*x3^2 - x2*x3 + x3^2, x1^2*x3 - x1^2 - x1*x2*x3 + x1*x2 - x1*x3^2 + x1*x3 - x2*x3 + x3^2, x1^3*x2*x3^2 - 2*x1^3*x2*x3 + x1^3*x2 + x1^3*x3^3 - 4*x1^3*x3^2 + 5*x1^3*x3 - 2*x1^3 - x1^2*x2^2*x3^2 + 3*x1^2*x2^2*x3 - 2*x1^2*x2^2 - x1^2*x2*x3^3 + 5*x1^2*x2*x3^2 - 9*x1^2*x2*x3 + 5*x1^2*x2 - x1^2*x3^3 + 2*x1^2*x3^2 - x1^2 - x1*x2^3*x3 + x1*x2^3 - 2*x1*x2^2*x3^2 + 5*x1*x2^2*x3 - 3*x1*x2^2 + x1*x2*x3^3 - 2*x1*x2*x3 + x1*x2 - x1*x3^2 + x1*x3 - x2^3*x3 + x2^2*x3^2 + 2*x2^2*x3 - 2*x2*x3^2 - x2*x3 + x3^2, x1^3*x2^2*x3 - x1^3*x2^2 + 2*x1^3*x2*x3^2 - 6*x1^3*x2*x3 + 4*x1^3*x2 + x1^3*x3^3 - 5*x1^3*x3^2 + 8*x1^3*x3 - 4*x1^3 - x1^2*x2^3*x3 + x1^2*x2^3 - 2*x1^2*x2^2*x3^2 + 7*x1^2*x2^2*x3 - 5*x1^2*x2^2 - x1^2*x2*x3^3 + 5*x1^2*x2*x3^2 - 10*x1^2*x2*x3 + 6*x1^2*x2 - x1^2*x3^3 + 3*x1^2*x3^2 - 2*x1^2*x3 - 2*x1*x2^3*x3 + x1*x2^3 - x1*x2^2*x3^2 + 7*x1*x2^2*x3 - 3*x1*x2^2 + x1*x2*x3^3 - x1*x2*x3^2 - 5*x1*x2*x3 + 2*x1*x2 - x1*x3^2 + 3*x1*x3 - x1 - x2^3*x3 + x2^2*x3^2 + 2*x2^2*x3 - 2*x2*x3^2 - x2*x3 + x3^2, x1^2*x2^2*x3 - x1^2*x2^2 + 2*x1^2*x2*x3^2 - 6*x1^2*x2*x3 + 4*x1^2*x2 + x1^2*x3^3 - 5*x1^2*x3^2 + 8*x1^2*x3 - 4*x1^2 - x1*x2^3*x3 + x1*x2^3 - 2*x1*x2^2*x3^2 + 6*x1*x2^2*x3 - 4*x1*x2^2 - x1*x2*x3^3 + 4*x1*x2*x3^2 - 6*x1*x2*x3 + 3*x1*x2 - x1*x3^3 + 4*x1*x3^2 - 5*x1*x3 + 2*x1 - x2^3*x3 + 3*x2^2*x3 + x2*x3^3 - 2*x2*x3^2 - 2*x2*x3 - x3^2 + 3*x3 - 1, x1*x2 + x1*x3 - 2*x1 - x3 + 1, x1*x2*x3 - x1*x2 + x1*x3^2 - 2*x1*x3 + x1 + x2*x3 - x3^2, x1^2*x2 + x1^2*x3 - 2*x1^2 + x1*x2*x3 + x1*x3^2 - 3*x1*x3 + x1 + x2*x3 - x3^2, x1^3*x2*x3 - x1^3*x2 + x1^3*x3^2 - 3*x1^3*x3 + 2*x1^3 - x1^2*x2^2*x3 + x1^2*x2^2 - x1^2*x2*x3^2 + 2*x1^2*x2*x3 - x1^2*x2 - 2*x1^2*x3^2 + 5*x1^2*x3 - 3*x1^2 - x1*x2^2 + 2*x1*x2*x3^2 - 3*x1*x2*x3 + 3*x1*x2 - x1*x3 + x2^2*x3 - x2*x3^2 - x2*x3 + x3^2, x1^2*x2*x3 - x1^2*x2 + x1^2*x3^2 - 3*x1^2*x3 + 2*x1^2 - x1*x2^2*x3 + x1*x2^2 - x1*x2*x3^2 + 3*x1*x2*x3 - 2*x1*x2 - x1*x3^2 + 2*x1*x3 - x1 - x2^2*x3 + x2*x3^2 + x2*x3 - 2*x3 + 1, x1^2*x2*x3 - x1^2*x2 + x1^2*x3^2 - 3*x1^2*x3 + 2*x1^2 - x1*x2^2*x3 + x1*x2^2 - x1*x2*x3^2 + 2*x1*x2*x3 - x1*x2 + x1*x3 - x1 - x2^2*x3 + x2*x3^2 + x2*x3 - x3^2, x1^2*x2*x3 - x1^2*x2 + x1^2*x3^2 - 3*x1^2*x3 + 2*x1^2 - x1*x2^2*x3 + x1*x2^2 - x1*x2*x3^2 + 4*x1*x2*x3 - 3*x1*x2 - x1*x3 + x1 - x2^2*x3 + x2*x3^2 + x2*x3 - x3^2]