Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:08:36 2013

Optimize a model with 24549 rows, 24059 columns and 96089 nonzeros
Presolve removed 2574 rows and 0 columns
Presolve time: 0.14s
Presolved: 21975 rows, 24059 columns, 90941 nonzeros
Variable types: 24010 continuous, 49 integer (49 binary)

Root relaxation: objective 5.577925e+04, 4733 iterations, 0.49 seconds

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

     0     0 55779.2473    0    3          - 55779.2473     -      -    0s
H    0     0                    56212.000000 55779.2473  0.77%     -    0s
H    0     0                    55924.000000 55779.2473  0.26%     -    0s
     0     0 55781.0314    0    4 55924.0000 55781.0314  0.26%     -    0s
     0     0 55781.6310    0    4 55924.0000 55781.6310  0.25%     -    0s
     0     0 55881.6400    0    1 55924.0000 55881.6400  0.08%     -    1s
     0     0 55881.6400    0    1 55924.0000 55881.6400  0.08%     -    1s
     0     0 55882.6994    0    2 55924.0000 55882.6994  0.07%     -    1s
     0     0 55882.6994    0    2 55924.0000 55882.6994  0.07%     -    1s
     0     0 55882.8699    0    2 55924.0000 55882.8699  0.07%     -    2s
     0     0 55889.6135    0    2 55924.0000 55889.6135  0.06%     -    2s
     0     0 55896.3070    0    2 55924.0000 55896.3070  0.05%     -    2s
     0     0 55898.5170    0    2 55924.0000 55898.5170  0.05%     -    2s
     0     0 55908.0816    0    1 55924.0000 55908.0816  0.03%     -    2s
     0     1 55923.8390    0    1 55924.0000 55923.8390  0.00%     -    2s

Cutting planes:
  Gomory: 1

Explored 1 nodes (6409 simplex iterations) in 2.36 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.592400000000e+04, best bound 5.592383899441e+04, gap 0.0003%