Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:29:06 2013

Optimize a model with 1500 rows, 51100 columns and 270850 nonzeros
Presolve removed 50 rows and 5650 columns
Presolve time: 0.40s
Presolved: 1450 rows, 45450 columns, 250850 nonzeros
Variable types: 45050 continuous, 400 integer (400 binary)

Root relaxation: objective 2.252562e+05, 3459 iterations, 0.14 seconds

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

     0     0 225256.157    0    5          - 225256.157     -      -    0s
     0     0 225267.296    0   10          - 225267.296     -      -    0s
     0     0 225267.296    0   10          - 225267.296     -      -    1s
     0     0 225267.516    0   10          - 225267.516     -      -    1s
     0     0 225267.516    0   10          - 225267.516     -      -    1s
     0     2 225272.422    0   10          - 225272.422     -      -    4s
    12    14 226355.545   10    5          - 225505.706     -   78.6    5s
*  132   121             127    227689.20813 225505.706  0.96%  13.6    8s
*  146     7              11    225915.15199 225522.706  0.17%  17.0    8s

Cutting planes:
  Flow cover: 4

Explored 160 nodes (8043 simplex iterations) in 9.32 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.259151519913e+05, best bound 2.258979331128e+05, gap 0.0076%