Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:09:48 2013

Optimize a model with 24598 rows, 24108 columns and 96138 nonzeros
Presolve removed 49 rows and 0 columns
Presolve time: 0.11s
Presolved: 24549 rows, 24108 columns, 96089 nonzeros
Variable types: 24059 continuous, 49 integer (49 binary)

Root relaxation: objective 4.147155e+04, 3103 iterations, 1.06 seconds

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

     0     0 41471.5485    0   37          - 41471.5485     -      -    1s
H    0     0                    54920.000000 41471.5485  24.5%     -    1s
     0     0 47919.0208    0    7 54920.0000 47919.0208  12.7%     -    3s
H    0     0                    51004.138687 47919.0208  6.05%     -    3s
H    0     0                    50077.000000 47919.0208  4.31%     -    3s
H    0     0                    49944.000000 47919.0208  4.05%     -    3s
     0     0 48162.0817    0    5 49944.0000 48162.0817  3.57%     -    3s
H    0     0                    48665.000000 48162.0817  1.03%     -    3s
H    0     0                    48367.000000 48162.0817  0.42%     -    3s
     0     0 48163.4485    0    2 48367.0000 48163.4485  0.42%     -    3s
     0     2 48163.6000    0    2 48367.0000 48163.6000  0.42%     -    4s

Cutting planes:
  Implied bound: 41

Explored 7 nodes (5702 simplex iterations) in 4.28 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.836700000000e+04, best bound 4.836438398169e+04, gap 0.0054%