Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:55:20 2013

Optimize a model with 23478 rows, 2704 columns and 71656 nonzeros
Presolve removed 2423 rows and 1377 columns
Presolve time: 0.16s
Presolved: 21055 rows, 1327 columns, 64292 nonzeros
Variable types: 23 continuous, 1304 integer (1304 binary)
Found heuristic solution: objective 65966.000000

Root relaxation: objective 5.204270e+04, 6670 iterations, 0.35 seconds

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

     0     0 52042.7000    0    7 65966.0000 52042.7000  21.1%     -    0s
H    0     0                    52056.000000 52042.7000  0.03%     -    0s
H    0     0                    52045.000000 52042.7000  0.00%     -    0s

Explored 0 nodes (6680 simplex iterations) in 0.61 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.204500000000e+04, best bound 5.204300000000e+04, gap 0.0038%