Gurobi 5.0.1 (linux64) logging started Wed Apr 24 04:24:20 2013

Optimize a model with 71484 rows, 70644 columns and 282324 nonzeros
Presolve removed 7042 rows and 0 columns
Presolve time: 0.46s
Presolved: 64442 rows, 70644 columns, 268240 nonzeros
Variable types: 70560 continuous, 84 integer (84 binary)

Root relaxation: objective 8.781887e+04, 13439 iterations, 3.30 seconds

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

     0     0 87818.8676    0    4          - 87818.8676     -      -    3s
H    0     0                    89941.000000 87818.8676  2.36%     -    4s
H    0     0                    88514.000000 87818.8676  0.79%     -    4s
     0     0 87822.2647    0    5 88514.0000 87822.2647  0.78%     -    4s
H    0     0                    88279.000000 87822.2647  0.52%     -    5s
     0     0 87822.2647    0    5 88279.0000 87822.2647  0.52%     -    5s
     0     0 87822.2647    0    5 88279.0000 87822.2647  0.52%     -    6s
     0     0 87822.2647    0    4 88279.0000 87822.2647  0.52%     -   11s
     0     0 87822.2647    0    5 88279.0000 87822.2647  0.52%     -   11s
     0     0 87822.2647    0    5 88279.0000 87822.2647  0.52%     -   12s
     0     0 87822.2647    0    5 88279.0000 87822.2647  0.52%     -   12s
     0     2 87824.0552    0    5 88279.0000 87824.0552  0.52%     -   14s
     1     4 88053.1079    1    4 88279.0000 87971.6649  0.35%   283   15s
H    4     2                    88226.446154 88064.1084  0.18%   263   15s
H    6     3                    88188.000000 88064.1084  0.14%   229   15s
*    7     2               5    88154.000000 88064.1084  0.10%   198   15s

Cutting planes:
  Gomory: 2
  Flow cover: 3

Explored 10 nodes (22160 simplex iterations) in 15.66 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.815400000000e+04, best bound 8.815400000000e+04, gap 0.0%