Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:19:38 2013

Optimize a model with 29808 rows, 29268 columns and 116748 nonzeros
Presolve removed 54 rows and 0 columns
Presolve time: 0.13s
Presolved: 29754 rows, 29268 columns, 116694 nonzeros
Variable types: 29214 continuous, 54 integer (54 binary)

Root relaxation: objective 4.501745e+04, 3046 iterations, 1.02 seconds

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

     0     0 45017.4525    0   42          - 45017.4525     -      -    1s
H    0     0                    63113.000000 45017.4525  28.7%     -    1s
     0     0 53917.0746    0    9 63113.0000 53917.0746  14.6%     -    3s
H    0     0                    58979.760653 53917.0746  8.58%     -    3s
H    0     0                    56388.000000 53917.0746  4.38%     -    3s
H    0     0                    56018.000000 53917.0746  3.75%     -    3s
     0     0 54086.1791    0    5 56018.0000 54086.1791  3.45%     -    3s
H    0     0                    55765.000000 54086.1791  3.01%     -    3s
     0     0 54086.7879    0    1 55765.0000 54086.7879  3.01%     -    3s
H    0     0                    54562.363636 54086.7879  0.87%     -    3s
H    0     0                    54484.000000 54086.7879  0.73%     -    3s
H    0     0                    54438.000000 54086.7879  0.65%     -    4s
     0     2 54087.9718    0    1 54438.0000 54087.9718  0.64%     -    4s
H    4     4                    54371.819277 54352.6867  0.04%   149    4s
*    5     1               4    54353.000000 54353.0000   0.0%   131    4s

Cutting planes:
  Gomory: 2
  Implied bound: 45

Explored 6 nodes (5841 simplex iterations) in 4.78 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.435300000000e+04, best bound 5.435300000000e+04, gap 0.0%