Gurobi 5.0.1 (linux64) logging started Wed Apr 24 03:10:04 2013

Optimize a model with 60137 rows, 59367 columns and 237237 nonzeros
Presolve removed 1516 rows and 0 columns
Presolve time: 0.38s
Presolved: 58621 rows, 59367 columns, 234205 nonzeros
Variable types: 59290 continuous, 77 integer (77 binary)

Root relaxation: objective 8.593592e+04, 11900 iterations, 2.40 seconds

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

     0     0 85935.9188    0    6          - 85935.9188     -      -    2s
H    0     0                    89254.000000 85935.9188  3.72%     -    3s
H    0     0                    86264.000000 85935.9188  0.38%     -    3s
     0     0 85944.0952    0    8 86264.0000 85944.0952  0.37%     -    3s
     0     0 85944.0952    0    6 86264.0000 85944.0952  0.37%     -    6s
     0     0 85944.2228    0    8 86264.0000 85944.2228  0.37%     -    6s
     0     0 85945.9555    0    8 86264.0000 85945.9555  0.37%     -    7s
     0     0 85946.0375    0    8 86264.0000 85946.0375  0.37%     -    7s
H    0     0                    86178.000000 85946.0375  0.27%     -    8s
     0     2 85963.0479    0    8 86178.0000 85963.0479  0.25%     -    9s

Cutting planes:
  Gomory: 2
  Flow cover: 11

Explored 22 nodes (18510 simplex iterations) in 9.75 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.617800000000e+04, best bound 8.617800000000e+04, gap 0.0%