The Prenucleolus (Prescision=15 places): 

x1 = 120.0000000000000000 
x2 = 120.0000000000000142 
x3 = 120.0000000000000284 

Excesses:

3.0000000000000000 ( )
0.0000000000000000 ( 1 2 3 )
-120.0000000000000000 ( 1 )
-120.0000000000000142 ( 2 )
-120.0000000000000284 ( 3 )
-121.0000000000000284 ( 1 3 )
-121.0000000000000568 ( 2 3 )
-240.0000000000000000 ( 1 2 )

Vector v:

3.0000000000000000 ( )
0.0000000000000000 ( 3 )
0.0000000000000000 ( 2 )
119.0000000000000000 ( 2 3 )
0.0000000000000000 ( 1 )
119.0000000000000000 ( 1 3 )
0.0000000000000000 ( 1 2 )
360.0000000000000000 ( 1 2 3 )