Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:04:53 2013

Optimize a model with 21712 rows, 21252 columns and 84732 nonzeros
Presolve removed 46 rows and 0 columns
Presolve time: 0.09s
Presolved: 21666 rows, 21252 columns, 84686 nonzeros
Variable types: 21206 continuous, 46 integer (46 binary)

Root relaxation: objective 3.845489e+04, 2594 iterations, 0.69 seconds

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

     0     0 38454.8887    0   35          - 38454.8887     -      -    0s
H    0     0                    50769.000000 38454.8887  24.3%     -    1s
     0     0 44411.3217    0    7 50769.0000 44411.3217  12.5%     -    2s
H    0     0                    46294.099348 44411.3217  4.07%     -    2s
H    0     0                    45232.000000 44411.3217  1.81%     -    2s
     0     0 44798.4723    0    3 45232.0000 44798.4723  0.96%     -    2s
H    0     0                    45071.000000 44798.4723  0.60%     -    2s
     0     2 44823.1754    0    3 45071.0000 44823.1754  0.55%     -    3s
*    4     3               3    44989.000000 44899.1032  0.20%   148    3s

Cutting planes:
  Implied bound: 39

Explored 7 nodes (5172 simplex iterations) in 3.31 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.498900000000e+04, best bound 4.498900000000e+04, gap 0.0%