Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:11:53 2012

Optimize a model with 3824 rows, 650 columns and 11998 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.07s
Presolved: 3822 rows, 648 columns, 18687 nonzeros
Variable types: 0 continuous, 648 integer (648 binary)
Found heuristic solution: objective 25.0000000

Root relaxation: objective 4.555556e+00, 4114 iterations, 0.31 seconds

    Nodes    |    Current Node    |     Objective Bounds      |     Work
 Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time

     0     0    4.55556    0  289   25.00000    4.55556  81.8%     -    0s
H    0     0                      20.0000000    4.55556  77.2%     -    0s
     0     0    6.00000    0   62   20.00000    6.00000  70.0%     -    1s
H    0     0                       7.0000000    6.00000  14.3%     -    1s
     0     0    6.00000    0   14    7.00000    6.00000  14.3%     -    1s
*    0     0               0       6.0000000    6.00000   0.0%     -    1s

Explored 0 nodes (8540 simplex iterations) in 1.18 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.000000000000e+00, best bound 6.000000000000e+00, gap 0.0%