Gurobi 5.0.1 (linux64) logging started Fri Nov 16 05:30:31 2012

Optimize a model with 7590 rows, 3080 columns and 25630 nonzeros
Presolve removed 1650 rows and 0 columns
Presolve time: 0.15s
Presolved: 5940 rows, 3080 columns, 21725 nonzeros
Variable types: 0 continuous, 3080 integer (3080 binary)
Found heuristic solution: objective 31.0000000

Root relaxation: objective 4.000000e+00, 4684 iterations, 0.33 seconds

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

*    0     0               0       4.0000000    4.00000   0.0%     -    0s

Explored 0 nodes (6561 simplex iterations) in 0.62 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%