Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:55:05 2013

Optimize a model with 22151 rows, 2601 columns and 67626 nonzeros
Presolve removed 2825 rows and 1340 columns
Presolve time: 0.15s
Presolved: 19326 rows, 1261 columns, 58842 nonzeros
Variable types: 18 continuous, 1243 integer (1243 binary)
Found heuristic solution: objective 61696.000000

Root relaxation: objective 5.007545e+04, 3746 iterations, 0.21 seconds

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

     0     0 50075.4500    0   15 61696.0000 50075.4500  18.8%     -    0s
H    0     0                    50103.000000 50075.4500  0.05%     -    0s
H    0     0                    50097.000000 50075.4500  0.04%     -    0s
     0     0 50076.0944    0   26 50097.0000 50076.0944  0.04%     -    0s
     0     0 50076.0944    0    8 50097.0000 50076.0944  0.04%     -    0s
H    0     0                    50091.000000 50076.0944  0.03%     -    0s
H    0     0                    50085.000000 50076.0944  0.02%     -    0s
H    0     0                    50081.000000 50076.0944  0.01%     -    0s

Explored 0 nodes (4619 simplex iterations) in 0.68 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.008100000000e+04, best bound 5.007700000000e+04, gap 0.0080%