Gurobi 5.0.1 (linux64) logging started Thu Jan 17 23:24:56 2013

Optimize a model with 1600 rows, 100800 columns and 201700 nonzeros
Presolve removed 200 rows and 300 columns
Presolve time: 0.40s
Presolved: 1400 rows, 100500 columns, 201000 nonzeros
Variable types: 100400 continuous, 100 integer (100 binary)

Root relaxation: objective 7.672886e+05, 6349 iterations, 0.57 seconds

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

     0     0 767288.564    0    3          - 767288.564     -      -    1s
H    0     0                    807219.05719 767288.564  4.95%     -    1s
H    0     0                    781728.30892 767288.564  1.85%     -    1s
     0     0 767323.887    0    2 781728.309 767323.887  1.84%     -    1s
     0     0 767323.887    0    2 781728.309 767323.887  1.84%     -    2s
     0     0 767323.887    0    2 781728.309 767323.887  1.84%     -    2s
     0     0 767323.887    0    2 781728.309 767323.887  1.84%     -    2s
     0     0 767323.887    0    2 781728.309 767323.887  1.84%     -    3s
     0     0 767323.887    0    2 781728.309 767323.887  1.84%     -    3s
     0     0 767323.887    0    2 781728.309 767323.887  1.84%     -    3s
     0     2 767332.914    0    2 781728.309 767332.914  1.84%     -    4s
     2     4 769252.248    2    1 781728.309 767645.181  1.80%   258    5s
*   13     5              12    768264.46012 767801.496  0.06%  74.9    6s

Cutting planes:
  Flow cover: 5

Explored 19 nodes (8522 simplex iterations) in 6.81 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.682644601246e+05, best bound 7.682013911906e+05, gap 0.0082%