The realization space is
  [1   0   1        1   0   1           1    0            1    1           1]
  [0   1   1   x1 + 1   0   0           0    1            1   x1          x1]
  [0   0   0        0   1   1   -x1^2 + 1   -1   -x1^2 + x1    1   -x1^2 + 1]
in the multivariate polynomial ring in 1 variable over ZZ
within the vanishing set of the ideal
Ideal (x1^7 - 2*x1^6 - x1^5 + 3*x1^4 - x1^2)
avoiding the zero loci of the polynomials
RingElem[x1, x1 - 1, x1^2 - x1 - 1, x1 + 1, x1^2 + x1 - 1, x1^3 - x1^2 + 1, x1^2 - x1 + 1]