Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:08:11 2012

Optimize a model with 2760 rows, 552 columns and 8740 nonzeros
Presolve removed 1104 rows and 0 columns
Presolve time: 0.04s
Presolved: 1656 rows, 552 columns, 8533 nonzeros
Variable types: 0 continuous, 552 integer (552 binary)
Found heuristic solution: objective 18.0000000

Root relaxation: objective 5.000000e+00, 2381 iterations, 0.18 seconds

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

     0     0    5.00000    0   20   18.00000    5.00000  72.2%     -    0s
H    0     0                       7.0000000    5.00000  28.6%     -    0s
H    0     0                       6.0000000    5.00000  16.7%     -    0s
     0     0    5.00000    0   72    6.00000    5.00000  16.7%     -    0s
     0     0    5.00000    0   20    6.00000    5.00000  16.7%     -    0s
     0     0    5.00000    0   22    6.00000    5.00000  16.7%     -    0s
     0     0    5.00000    0   32    6.00000    5.00000  16.7%     -    0s
     0     0    5.00000    0   32    6.00000    5.00000  16.7%     -    1s
     0     0    5.00000    0   55    6.00000    5.00000  16.7%     -    1s
     0     0    5.00000    0   55    6.00000    5.00000  16.7%     -    1s
     0     2    5.00000    0   55    6.00000    5.00000  16.7%     -    1s

Explored 3 nodes (15626 simplex iterations) in 1.83 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%