Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:19:56 2013

Optimize a model with 30855 rows, 30305 columns and 121055 nonzeros
Presolve removed 1702 rows and 0 columns
Presolve time: 0.17s
Presolved: 29153 rows, 30305 columns, 117651 nonzeros
Variable types: 30250 continuous, 55 integer (55 binary)

Root relaxation: objective 5.788758e+04, 5851 iterations, 0.66 seconds

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

     0     0 57887.5830    0    5          - 57887.5830     -      -    0s
H    0     0                    58342.000000 57887.5830  0.78%     -    0s
H    0     0                    58032.000000 57887.5830  0.25%     -    1s
     0     0 57892.2524    0    9 58032.0000 57892.2524  0.24%     -    1s
     0     0 57918.6140    0    8 58032.0000 57918.6140  0.20%     -    1s
     0     0 57919.1737    0    6 58032.0000 57919.1737  0.19%     -    1s
     0     0 57919.1737    0    4 58032.0000 57919.1737  0.19%     -    2s
     0     0 57921.4843    0    7 58032.0000 57921.4843  0.19%     -    2s
     0     0 57921.4843    0    7 58032.0000 57921.4843  0.19%     -    2s
     0     2 57928.9299    0    7 58032.0000 57928.9299  0.18%     -    3s
*    8     5               6    58026.000000 57971.1061  0.09%  39.8    3s
*   13     3               4    58020.000000 57984.5751  0.06%  33.7    3s

Cutting planes:
  Gomory: 2
  Flow cover: 4

Explored 20 nodes (8584 simplex iterations) in 3.49 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.802000000000e+04, best bound 5.802000000000e+04, gap 0.0%