Gurobi 5.0.1 (linux64) logging started Fri Nov 16 15:24:05 2012

Optimize a model with 6632 rows, 4556 columns and 24118 nonzeros
Presolve removed 407 rows and 203 columns
Presolve time: 0.22s
Presolved: 6225 rows, 4353 columns, 22726 nonzeros
Variable types: 0 continuous, 4353 integer (4353 binary)
Found heuristic solution: objective 67.0000000

Root relaxation: objective 4.000000e+00, 4405 iterations, 0.28 seconds

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

     0     0    4.00000    0   72   67.00000    4.00000  94.0%     -    0s
H    0     0                       5.0000000    4.00000  20.0%     -    0s
H    0     0                       4.0000000    4.00000   0.0%     -    0s

Explored 0 nodes (9008 simplex iterations) in 0.96 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%