Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:18:29 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 4.933047e+04, 4528 iterations, 1.72 seconds

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

     0     0 49330.4708    0   47          - 49330.4708     -      -    2s
H    0     0                    66989.000000 49330.4708  26.4%     -    2s
     0     0 61494.7293    0    7 66989.0000 61494.7293  8.20%     -    4s
H    0     0                    64519.000000 61494.7293  4.69%     -    4s
H    0     0                    62163.000000 61494.7293  1.08%     -    4s
     0     0 61876.0297    0    4 62163.0000 61876.0297  0.46%     -    5s
H    0     0                    61929.000000 61876.0297  0.09%     -    5s
     0     0 61876.3673    0    3 61929.0000 61876.3673  0.08%     -    5s
     0     0 61924.6070    0    2 61929.0000 61924.6070  0.01%     -    5s

Cutting planes:
  Gomory: 1
  Implied bound: 47

Explored 0 nodes (7673 simplex iterations) in 5.57 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.192900000000e+04, best bound 6.192460696721e+04, gap 0.0071%