Given an $n\times n$ integer-valued matrix $A$, one can define the stationary direct limit
$$\varinjlim (\mathbb{Z}^n,A)=\mathbb{Z}^n\overset{A}{\to}\mathbb{Z}^n\overset{A}{\to}\mathbb{Z}^n\overset{A}{\to}\cdots.$$
One can interpret $A$ as the adjacency matrix of a graph $G$ and then this computation yields the so-called (stable) dimension group of the edge shift (subshift of finite type) associated with $G$.
Does anyone know of a software for computing these gadgets? More generally, any reference on how to compute these groups in many situations would be appreciated.
Edit: $A$ can be taken such that every entry is nonnegative, if that helps.