Gurobi 5.0.1 (linux64) logging started Fri Jan 18 08:06:08 2013

Optimize a model with 50800 rows, 125150 columns and 400250 nonzeros
Presolve removed 50 rows and 50 columns
Presolve time: 1.13s
Presolved: 50750 rows, 125100 columns, 350200 nonzeros
Variable types: 75100 continuous, 50000 integer (50000 binary)

Root relaxation: objective 2.208160e+05, 4014 iterations, 0.28 seconds

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

     0     0 220815.985    0    8          - 220815.985     -      -    3s
     0     0 220939.532    0    4          - 220939.532     -      -    4s
     0     0 220978.219    0    6          - 220978.219     -      -    5s
     0     0 220978.765    0    6          - 220978.765     -      -    5s
     0     0 220981.920    0    6          - 220981.920     -      -    6s
     0     0 220981.920    0    6          - 220981.920     -      -    6s
     0     0 220981.920    0    6          - 220981.920     -      -    7s
     0     0 220981.920    0    6          - 220981.920     -      -    8s
     0     2 220981.920    0    6          - 220981.920     -      -   13s
    11    13 226865.497    6    6          - 221212.240     -    177   15s
*   54    12              27    221476.99204 221240.781  0.11%  71.2   18s
    73     6 221401.103   19    4 221476.992 221240.781  0.11%  55.3   20s

Cutting planes:
  Gomory: 1
  Implied bound: 41
  Flow cover: 3

Explored 80 nodes (9985 simplex iterations) in 20.26 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.214769920401e+05, best bound 2.214758441338e+05, gap 0.0005%