Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:06:36 2012

Optimize a model with 1619 rows, 342 columns and 5110 nonzeros
Presolve removed 992 rows and 2 columns
Presolve time: 0.03s
Presolved: 627 rows, 340 columns, 3420 nonzeros
Variable types: 0 continuous, 340 integer (340 binary)
Found heuristic solution: objective 18.0000000

Root relaxation: objective 5.000000e+00, 624 iterations, 0.02 seconds

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

     0     0    5.00000    0   30   18.00000    5.00000  72.2%     -    0s
H    0     0                      15.0000000    5.00000  66.7%     -    0s
H    0     0                       6.0000000    5.00000  16.7%     -    0s
     0     0    5.00000    0  141    6.00000    5.00000  16.7%     -    0s
     0     0    5.00000    0   36    6.00000    5.00000  16.7%     -    0s
     0     0    5.00000    0   52    6.00000    5.00000  16.7%     -    0s
     0     0    5.00000    0   78    6.00000    5.00000  16.7%     -    0s
     0     0    5.00000    0   83    6.00000    5.00000  16.7%     -    0s
     0     0    5.00000    0   83    6.00000    5.00000  16.7%     -    0s
     0     2    5.00000    0   83    6.00000    5.00000  16.7%     -    0s

Explored 3 nodes (7953 simplex iterations) in 0.66 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%