Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:04:25 2013

Optimize a model with 21666 rows, 21206 columns and 84686 nonzeros
Presolve removed 1511 rows and 0 columns
Presolve time: 0.12s
Presolved: 20155 rows, 21206 columns, 81664 nonzeros
Variable types: 21160 continuous, 46 integer (46 binary)

Root relaxation: objective 4.917740e+04, 2924 iterations, 0.23 seconds

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

     0     0 49177.4011    0    5          - 49177.4011     -      -    0s
H    0     0                    49925.000000 49177.4011  1.50%     -    0s
H    0     0                    49322.000000 49177.4011  0.29%     -    0s
     0     0 49182.8818    0    6 49322.0000 49182.8818  0.28%     -    0s
     0     0 49182.8818    0    5 49322.0000 49182.8818  0.28%     -    0s
     0     0 49185.0893    0    6 49322.0000 49185.0893  0.28%     -    1s
     0     0 49204.0342    0    4 49322.0000 49204.0342  0.24%     -    1s
     0     2 49206.5627    0    4 49322.0000 49206.5627  0.23%     -    1s
*    4     3               3    49283.000000 49232.7892  0.10%  39.8    1s

Cutting planes:
  Gomory: 2
  Flow cover: 2

Explored 10 nodes (4489 simplex iterations) in 1.38 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.928300000000e+04, best bound 4.928300000000e+04, gap 0.0%