Gurobi 5.0.1 (linux64) logging started Mon Feb  4 19:05:29 2013

Optimize a model with 62268 rows, 5184 columns and 189216 nonzeros
Presolve removed 3140 rows and 2597 columns
Presolve time: 0.45s
Presolved: 59128 rows, 2587 columns, 180074 nonzeros
Variable types: 39 continuous, 2548 integer (2548 binary)
Found heuristic solution: objective 99439.000000

Root relaxation: objective 6.809691e+04, 29078 iterations, 3.08 seconds

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

     0     0 68096.9116    0   12 99439.0000 68096.9116  31.5%     -    3s
H    0     0                    68106.000000 68096.9116  0.01%     -    3s
     0     0 68098.5727    0   21 68106.0000 68098.5727  0.01%     -    4s
     0     0 68098.5727    0   11 68106.0000 68098.5727  0.01%     -    4s
H    0     0                    68103.000000 68098.5727  0.01%     -    4s

Explored 0 nodes (31278 simplex iterations) in 4.48 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.810300000000e+04, best bound 6.809900000000e+04, gap 0.0059%