Gurobi 5.0.1 (linux64) logging started Fri Jan 18 06:07:37 2013

Optimize a model with 1600 rows, 50600 columns and 326550 nonzeros
Presolve removed 50 rows and 50 columns
Presolve time: 0.62s
Presolved: 1550 rows, 50550 columns, 301500 nonzeros
Variable types: 50100 continuous, 450 integer (450 binary)

Root relaxation: objective 2.208160e+05, 2455 iterations, 0.16 seconds

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

     0     0 220815.985    0   12          - 220815.985     -      -    1s
     0     0 220820.289    0   12          - 220820.289     -      -    1s
     0     0 220824.623    0   15          - 220824.623     -      -    1s
     0     0 220824.931    0   15          - 220824.931     -      -    1s
     0     0 220824.931    0   15          - 220824.931     -      -    1s
     0     0 220824.931    0   15          - 220824.931     -      -    2s
     0     0 220824.931    0   15          - 220824.931     -      -    2s
     0     0 220824.973    0   15          - 220824.973     -      -    2s
     0     0 220825.040    0   15          - 220825.040     -      -    3s
     0     0 220825.040    0   15          - 220825.040     -      -    3s
     0     2 220830.627    0   15          - 220830.627     -      -    7s
    49    51 221496.426   47    3          - 220845.009     -   16.8   10s
*  144    46             142    221600.46715 220845.009  0.34%   6.9   13s
H  173    24                    221483.75618 221026.570  0.21%   8.4   14s
*  177    26              31    221483.57097 221026.570  0.21%   8.2   14s
   230    35 221250.238    3    6 221483.571 221250.238  0.11%  14.1   15s

Cutting planes:
  Flow cover: 12

Explored 254 nodes (7305 simplex iterations) in 15.46 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.214835709686e+05, best bound 2.214630548990e+05, gap 0.0093%