Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:24:40 2013

Optimize a model with 51191 rows, 50481 columns and 201711 nonzeros
Presolve removed 3730 rows and 0 columns
Presolve time: 0.31s
Presolved: 47461 rows, 50481 columns, 194251 nonzeros
Variable types: 50410 continuous, 71 integer (71 binary)

Root relaxation: objective 8.867344e+04, 11959 iterations, 2.09 seconds

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

     0     0 88673.4354    0    3          - 88673.4354     -      -    2s
H    0     0                    89266.000000 88673.4354  0.66%     -    2s
H    0     0                    88813.000000 88673.4354  0.16%     -    3s
     0     0 88681.1236    0    4 88813.0000 88681.1236  0.15%     -    3s
     0     0 88681.1236    0    4 88813.0000 88681.1236  0.15%     -    3s
     0     0 88681.1236    0    4 88813.0000 88681.1236  0.15%     -    3s
     0     0 88693.4550    0    3 88813.0000 88693.4550  0.13%     -    4s
     0     0 88693.4550    0    3 88813.0000 88693.4550  0.13%     -    6s
     0     0 88700.9115    0    5 88813.0000 88700.9115  0.13%     -    6s
     0     0 88700.9115    0    5 88813.0000 88700.9115  0.13%     -    6s
     0     0 88700.9183    0    4 88813.0000 88700.9183  0.13%     -    6s
     0     2 88702.4433    0    4 88813.0000 88702.4433  0.12%     -    7s
*    7     3               5    88805.000000 88738.8462  0.07%  66.1    7s

Cutting planes:
  Gomory: 1
  Flow cover: 2

Explored 15 nodes (17617 simplex iterations) in 7.55 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.880500000000e+04, best bound 8.880500000000e+04, gap 0.0%