Gurobi 5.0.1 (linux64) logging started Wed Apr 24 03:17:25 2013

Optimize a model with 61698 rows, 60918 columns and 243438 nonzeros
Presolve removed 3613 rows and 0 columns
Presolve time: 0.39s
Presolved: 58085 rows, 60918 columns, 236212 nonzeros
Variable types: 60840 continuous, 78 integer (78 binary)

Root relaxation: objective 8.603966e+04, 14060 iterations, 3.17 seconds

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

     0     0 86039.6563    0    5          - 86039.6563     -      -    3s
H    0     0                    87261.000000 86039.6563  1.40%     -    3s
H    0     0                    86661.000000 86039.6563  0.72%     -    4s
     0     0 86041.6688    0    5 86661.0000 86041.6688  0.71%     -    4s
     0     0 86042.6757    0    5 86661.0000 86042.6757  0.71%     -    4s
H    0     0                    86427.000000 86042.6757  0.44%     -    6s
H    0     0                    86132.000000 86042.6757  0.10%     -    6s
     0     0 86042.6757    0    5 86132.0000 86042.6757  0.10%     -    8s
     0     0 86042.6852    0    5 86132.0000 86042.6852  0.10%     -    8s
     0     0 86042.7271    0    5 86132.0000 86042.7271  0.10%     -    8s
     0     2 86045.0397    0    5 86132.0000 86045.0397  0.10%     -    9s
    16     1     cutoff    2      86132.0000 86121.4170  0.01%  49.3   10s

Cutting planes:
  Gomory: 2
  Flow cover: 7

Explored 18 nodes (18779 simplex iterations) in 10.02 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.613200000000e+04, best bound 8.613200000000e+04, gap 0.0%