Starting new matrix.
mat11  --  Very ill-conditioned matrix.
4
1 1  0.00000001
1 2 -1.0
2 1 -1.0
2 2  0.00000001
2 3 -1.0
2 4 -1.0
3 2 -1.0
3 3  0.00000001
3 4  3.0
4 3 -1.0
4 4 -0.000000000001
0 0  0.0
Beginning source vector.
34.0
0.0
0.0
0.0