Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:23:06 2013

Optimize a model with 32032 rows, 31472 columns and 125552 nonzeros
Presolve removed 56 rows and 0 columns
Presolve time: 0.14s
Presolved: 31976 rows, 31472 columns, 125496 nonzeros
Variable types: 31416 continuous, 56 integer (56 binary)

Root relaxation: objective 4.726601e+04, 3480 iterations, 0.93 seconds

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

     0     0 47266.0077    0   42          - 47266.0077     -      -    1s
H    0     0                    63874.000000 47266.0077  26.0%     -    1s
     0     0 52943.1855    0   10 63874.0000 52943.1855  17.1%     -    3s
H    0     0                    59811.163243 52943.1855  11.5%     -    3s
H    0     0                    54168.000000 52943.1855  2.26%     -    3s
     0     0 53432.2142    0    6 54168.0000 53432.2142  1.36%     -    3s
     0     0 53559.6344    0    4 54168.0000 53559.6344  1.12%     -    4s
H    0     0                    54071.000000 53559.6344  0.95%     -    4s
     0     0 53560.6389    0    3 54071.0000 53560.6389  0.94%     -    4s
H    0     0                    54034.000000 53560.6389  0.88%     -    4s
     0     2 53563.2606    0    3 54034.0000 53563.2606  0.87%     -    5s
H    3     3                    53958.534884 53688.5214  0.50%   105    5s
H    5     3                    53896.942857 53714.7855  0.34%   244    5s
H    6     4                    53851.918919 53714.7855  0.25%   212    5s
H    7     4                    53832.315789 53714.7855  0.22%   200    5s
*    8     3               6    53799.000000 53714.7855  0.16%   183    5s

Cutting planes:
  Gomory: 1
  Implied bound: 50

Explored 13 nodes (8310 simplex iterations) in 5.91 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.379900000000e+04, best bound 5.379702702703e+04, gap 0.0037%