Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:03:56 2013

Optimize a model with 20790 rows, 20340 columns and 81090 nonzeros
Presolve removed 45 rows and 0 columns
Presolve time: 0.09s
Presolved: 20745 rows, 20340 columns, 81045 nonzeros
Variable types: 20295 continuous, 45 integer (45 binary)

Root relaxation: objective 4.082866e+04, 2736 iterations, 0.83 seconds

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

     0     0 40828.6573    0   41          - 40828.6573     -      -    1s
H    0     0                    51159.000000 40828.6573  20.2%     -    1s
     0     0 47154.1408    0    8 51159.0000 47154.1408  7.83%     -    2s
H    0     0                    49346.816213 47154.1408  4.44%     -    2s
H    0     0                    47868.000000 47154.1408  1.49%     -    2s
     0     0 47192.9332    0    5 47868.0000 47192.9332  1.41%     -    2s
H    0     0                    47834.000000 47192.9332  1.34%     -    2s
H    0     0                    47375.000000 47192.9332  0.38%     -    2s
     0     2 47195.1134    0    5 47375.0000 47195.1134  0.38%     -    3s

Cutting planes:
  Implied bound: 40

Explored 9 nodes (5144 simplex iterations) in 3.32 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.737500000000e+04, best bound 4.737500000000e+04, gap 0.0%