Gurobi 5.0.1 (linux64) logging started Wed Apr 24 03:17:38 2013

Optimize a model with 61698 rows, 60918 columns and 243438 nonzeros
Presolve removed 3124 rows and 0 columns
Presolve time: 0.40s
Presolved: 58574 rows, 60918 columns, 237190 nonzeros
Variable types: 60840 continuous, 78 integer (78 binary)

Root relaxation: objective 8.785257e+04, 12000 iterations, 2.38 seconds

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

     0     0 87852.5698    0    4          - 87852.5698     -      -    2s
H    0     0                    89630.000000 87852.5698  1.98%     -    3s
H    0     0                    87962.000000 87852.5698  0.12%     -    3s
     0     0 87853.4821    0    5 87962.0000 87853.4821  0.12%     -    3s
     0     0 87853.4821    0    4 87962.0000 87853.4821  0.12%     -    5s
     0     0 87853.4885    0    5 87962.0000 87853.4885  0.12%     -    5s
     0     0 87878.6364    0    1 87962.0000 87878.6364  0.09%     -    6s
     0     2 87880.3333    0    1 87962.0000 87880.3333  0.09%     -    6s
*    3     0               2    87932.000000 87932.0000   0.0%  55.0    7s

Cutting planes:
  Gomory: 1
  Flow cover: 2

Explored 4 nodes (15965 simplex iterations) in 7.09 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.793200000000e+04, best bound 8.793200000000e+04, gap 0.0%