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