Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:08:34 2013

Optimize a model with 24549 rows, 24059 columns and 96089 nonzeros
Presolve removed 2532 rows and 0 columns
Presolve time: 0.14s
Presolved: 22017 rows, 24059 columns, 91025 nonzeros
Variable types: 24010 continuous, 49 integer (49 binary)

Root relaxation: objective 5.426032e+04, 4565 iterations, 0.44 seconds

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

     0     0 54260.3225    0    4          - 54260.3225     -      -    0s
H    0     0                    54519.000000 54260.3225  0.47%     -    0s
H    0     0                    54298.000000 54260.3225  0.07%     -    0s
     0     0 54266.7710    0    5 54298.0000 54266.7710  0.06%     -    0s
     0     0 54266.9043    0    4 54298.0000 54266.9043  0.06%     -    0s
     0     0 54295.2449    0    1 54298.0000 54295.2449  0.01%     -    1s

Cutting planes:
  Gomory: 1
  Flow cover: 4

Explored 0 nodes (4672 simplex iterations) in 1.21 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.429800000000e+04, best bound 5.429524489796e+04, gap 0.0051%