Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:34:53 2013

Optimize a model with 1500 rows, 35550 columns and 151400 nonzeros
Presolve removed 50 rows and 50 columns
Presolve time: 0.24s
Presolved: 1450 rows, 35500 columns, 141350 nonzeros
Variable types: 35100 continuous, 400 integer (400 binary)

Root relaxation: objective 1.749223e+05, 2073 iterations, 0.10 seconds

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

     0     0 174922.321    0    6          - 174922.321     -      -    0s
     0     0 174926.677    0    6          - 174926.677     -      -    0s
     0     0 174928.041    0    8          - 174928.041     -      -    0s
     0     0 174928.041    0    8          - 174928.041     -      -    0s
     0     0 174928.052    0    8          - 174928.052     -      -    0s
     0     0 174928.654    0    6          - 174928.654     -      -    1s
     0     0 174928.654    0    8          - 174928.654     -      -    1s
     0     0 174928.654    0    6          - 174928.654     -      -    1s
     0     0 174928.654    0    7          - 174928.654     -      -    1s
     0     0 174928.654    0    7          - 174928.654     -      -    1s
     0     2 174932.142    0    7          - 174932.142     -      -    3s
*   98    72              97    176597.82374 175050.734  0.88%   8.8    4s
   102    69 175051.622    1    8 176597.824 175051.622  0.88%   8.8    5s
*  140    50              16    176365.11984 175258.305  0.63%  13.2    5s
*  168    51              26    176357.72278 175345.503  0.57%  14.5    6s
H  210    38                    176210.45151 175806.688  0.23%  18.3    7s

Cutting planes:
  Flow cover: 8

Explored 274 nodes (7717 simplex iterations) in 7.65 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.762104515062e+05, best bound 1.761959364749e+05, gap 0.0082%