Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:15:23 2013

Optimize a model with 27664 rows, 27144 columns and 108264 nonzeros
Presolve removed 52 rows and 0 columns
Presolve time: 0.12s
Presolved: 27612 rows, 27144 columns, 108212 nonzeros
Variable types: 27092 continuous, 52 integer (52 binary)

Root relaxation: objective 4.190338e+04, 3423 iterations, 1.11 seconds

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

     0     0 41903.3790    0   45          - 41903.3790     -      -    1s
H    0     0                    57542.000000 41903.3790  27.2%     -    1s
     0     0 47223.0504    0    8 57542.0000 47223.0504  17.9%     -    3s
H    0     0                    54807.575051 47223.0504  13.8%     -    3s
H    0     0                    50753.000000 47223.0504  6.96%     -    3s
     0     0 47368.6932    0    2 50753.0000 47368.6932  6.67%     -    4s
H    0     0                    48306.900114 47368.6932  1.94%     -    4s
H    0     0                    47989.000000 47368.6932  1.29%     -    4s
H    0     0                    47804.000000 47368.6932  0.91%     -    4s
     0     2 47376.3647    0    2 47804.0000 47376.3647  0.89%     -    4s
     2     2 47613.1108    1    3 47804.0000 47434.8401  0.77%   327    5s
*    4     2               3    47720.000000 47434.8401  0.60%   236    5s
H    8     1                    47690.406780 47444.6667  0.52%   184    5s
*    9     2               4    47528.000000 47528.0000   0.0%   181    5s

Cutting planes:
  Implied bound: 47

Explored 10 nodes (7337 simplex iterations) in 5.44 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.752800000000e+04, best bound 4.752800000000e+04, gap 0.0%