Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:19:30 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 4.677098e+04, 3863 iterations, 1.63 seconds

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

     0     0 46770.9827    0   45          - 46770.9827     -      -    1s
H    0     0                    59300.000000 46770.9827  21.1%     -    2s
     0     0 53539.9413    0    8 59300.0000 53539.9413  9.71%     -    4s
H    0     0                    55906.523176 53539.9413  4.23%     -    4s
H    0     0                    54897.000000 53539.9413  2.47%     -    4s
H    0     0                    54872.000000 53539.9413  2.43%     -    4s
     0     0 53998.9444    0    7 54872.0000 53998.9444  1.59%     -    4s
     0     0 54019.0583    0    3 54872.0000 54019.0583  1.55%     -    4s
     0     2 54020.9286    0    3 54872.0000 54020.9286  1.55%     -    5s
H    3     2                    54591.833333 54236.0952  0.65%   156    5s
H    5     3                    54268.478261 54236.3333  0.06%   111    5s
*   11     3              10    54261.000000 54250.8014  0.02%  86.0    5s

Cutting planes:
  Gomory: 1
  Implied bound: 50

Explored 17 nodes (7548 simplex iterations) in 6.05 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.426100000000e+04, best bound 5.426100000000e+04, gap 0.0%