Gurobi 5.0.1 (linux64) logging started Mon Feb  4 19:11:50 2013

Optimize a model with 82239 rows, 6241 columns and 249640 nonzeros
Presolve removed 6063 rows and 3165 columns
Presolve time: 0.76s
Presolved: 76176 rows, 3076 columns, 231106 nonzeros
Variable types: 34 continuous, 3042 integer (3042 binary)
Found heuristic solution: objective 117647.00000

Root relaxation: objective 8.446795e+04, 22289 iterations, 2.48 seconds

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

     0     0 84467.9545    0   15 117647.000 84467.9545  28.2%     -    3s
H    0     0                    84478.000000 84467.9545  0.01%     -    3s
H    0     0                    84475.000000 84467.9545  0.01%     -    3s

Explored 0 nodes (22335 simplex iterations) in 3.66 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.447500000000e+04, best bound 8.446800000000e+04, gap 0.0083%