Starting new matrix.
mna6 -- MNA matrix with 4 floating voltage sources in series.
9
1 1  2.0
5 5  2.0
6 1  1.0
1 6  1.0
6 2 -1.0
2 6 -1.0
7 2  1.0
2 7  1.0
7 3 -1.0
3 7 -1.0
8 3  1.0
3 8  1.0
8 4 -1.0
4 8 -1.0
9 4  1.0
4 9  1.0
9 5 -1.0
5 9 -1.0
0 0  0.0
0.0
0.0
0.0
0.0
0.0
1.0
1.0
1.0
1.0