Gurobi 5.0.1 (linux64) logging started Fri Nov 16 15:22:40 2012

Optimize a model with 9108 rows, 4422 columns and 31482 nonzeros
Presolve removed 793 rows and 66 columns
Presolve time: 0.16s
Presolved: 8315 rows, 4356 columns, 29502 nonzeros
Variable types: 0 continuous, 4356 integer (4356 binary)
Found heuristic solution: objective 38.0000000

Root relaxation: objective 3.000000e+00, 7577 iterations, 0.85 seconds

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

     0     0    3.00000    0   67   38.00000    3.00000  92.1%     -    2s
H    0     0                       4.0000000    3.00000  25.0%     -    2s
H    0     0                       3.0000000    3.00000   0.0%     -    2s

Explored 0 nodes (25185 simplex iterations) in 2.99 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.000000000000e+00, best bound 3.000000000000e+00, gap 0.0%