The Prenucleolus (Prescision=15 places): 

x1 = 0.7499999999999999 
x2 = 0.7500000000000000 
x3 = 0.4999999999999998 

Excesses:

3.0000000000000000 ( )
0.0000000000000002 ( 1 2 3 )
-0.4999999999999998 ( 3 )
-0.5000000000000000 ( 1 2 )
-0.7499999999999999 ( 1 )
-0.7500000000000000 ( 2 )
-1.2499999999999996 ( 1 3 )
-1.2499999999999998 ( 2 3 )

Vector v:

3.0000000000000000 ( )
0.0000000000000000 ( 3 )
0.0000000000000000 ( 2 )
0.0000000000000000 ( 2 3 )
0.0000000000000000 ( 1 )
0.0000000000000000 ( 1 3 )
1.0000000000000000 ( 1 2 )
2.0000000000000000 ( 1 2 3 )