Gurobi 5.0.1 (linux64) logging started Fri Nov 16 04:07:41 2012

Optimize a model with 6517 rows, 2450 columns and 21805 nonzeros
Presolve removed 1912 rows and 49 columns
Presolve time: 0.14s
Presolved: 4605 rows, 2401 columns, 17493 nonzeros
Variable types: 0 continuous, 2401 integer (2401 binary)
Found heuristic solution: objective 28.0000000

Root relaxation: objective 4.000000e+00, 5521 iterations, 0.60 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%     -    1s

Explored 0 nodes (9539 simplex iterations) in 1.02 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%