Gurobi 5.0.1 (linux64) logging started Fri Nov 16 16:55:23 2012

Optimize a model with 12400 rows, 6480 columns and 43360 nonzeros
Presolve removed 1522 rows and 160 columns
Presolve time: 0.25s
Presolved: 10878 rows, 6320 columns, 39440 nonzeros
Variable types: 0 continuous, 6320 integer (6320 binary)
Found heuristic solution: objective 49.0000000

Root relaxation: objective 3.000000e+00, 10621 iterations, 1.22 seconds

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

     0     0    3.00000    0  107   49.00000    3.00000  93.9%     -    3s
H    0     0                       4.0000000    3.00000  25.0%     -    3s
H    0     0                       3.0000000    3.00000   0.0%     -    3s

Explored 0 nodes (27458 simplex iterations) in 3.82 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%