Singular

LIB "polymake.lib";
==> Welcome to polymake version
==> Copyright (c) 1997-2015
==> Ewgenij Gawrilow, Michael Joswig (TU Darmstadt)
==> http://www.polymake.org
intmat M[3][3]=
1,2,-1,
1,-1,2,
1,-1,-1;
polytope p = polytopeViaPoints(M);
nInteriorLatticePoints(p);
==> polymake: used package cdd
==>   cddlib
==>   Implementation of the double description method of Motzkin et al.
==>   Copyright by Komei Fukuda.
==>   http://www.ifor.math.ethz.ch/~fukuda/cdd_home/cdd.html
==> 
==> polymake: used package latte
==>   LattE (Lattice point Enumeration) is a computer software dedicated to t\
   he 
==>   problems of counting lattice points and integration inside convex polyt\
   opes.
==>   Copyright by Matthias Koeppe, Jesus A. De Loera and others.
==>   http://www.math.ucdavis.edu/~latte/
==> 
==> 1
intmat N[2][3]=
1,2,0,
1,0,2;
polytope q = polytopeViaPoints(N);
nInteriorLatticePoints(q);
==> 1