Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:18:03 2013

Optimize a model with 29754 rows, 29214 columns and 116694 nonzeros
Presolve removed 2205 rows and 0 columns
Presolve time: 0.16s
Presolved: 27549 rows, 29214 columns, 112284 nonzeros
Variable types: 29160 continuous, 54 integer (54 binary)

Root relaxation: objective 5.445251e+04, 5406 iterations, 0.69 seconds

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

     0     0 54452.5103    0    2          - 54452.5103     -      -    0s
H    0     0                    55398.000000 54452.5103  1.71%     -    0s
     0     0 54453.0074    0    4 55398.0000 54453.0074  1.71%     -    1s
     0     0 54453.0074    0    4 55398.0000 54453.0074  1.71%     -    1s
H    0     0                    54675.966102 54453.0074  0.41%     -    1s
H    0     0                    54624.000000 54453.0074  0.31%     -    1s
     0     2 54456.9883    0    4 54624.0000 54456.9883  0.31%     -    2s
*   13     0               4    54572.000000 54572.0000   0.0%  58.3    2s

Cutting planes:
  Gomory: 1
  Flow cover: 1

Explored 14 nodes (6191 simplex iterations) in 2.53 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.457200000000e+04, best bound 5.457200000000e+04, gap 0.0%