Gurobi 5.0.1 (linux64) logging started Thu Jan 17 23:29:01 2013

Optimize a model with 1600 rows, 100700 columns and 201900 nonzeros
Presolve removed 100 rows and 100 columns
Presolve time: 0.41s
Presolved: 1500 rows, 100600 columns, 201500 nonzeros
Variable types: 100500 continuous, 100 integer (100 binary)

Root relaxation: objective 7.672886e+05, 6846 iterations, 0.75 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
     0     0 767323.887    0    2 807219.057 767323.887  4.94%     -    1s
     0     0 767323.887    0    2 807219.057 767323.887  4.94%     -    2s
     0     0 767323.887    0    2 807219.057 767323.887  4.94%     -    2s
     0     0 767323.887    0    2 807219.057 767323.887  4.94%     -    3s
     0     0 767323.887    0    2 807219.057 767323.887  4.94%     -    3s
     0     0 767323.887    0    2 807219.057 767323.887  4.94%     -    3s
     0     0 767323.887    0    2 807219.057 767323.887  4.94%     -    4s
     0     2 767332.914    0    2 807219.057 767332.914  4.94%     -    4s
     1     3 767561.110    1    1 807219.057 767561.110  4.91%   372    5s
*   15     5              14    768264.46012 767804.496  0.06%  68.4    6s

Cutting planes:
  Flow cover: 6

Explored 21 nodes (9950 simplex iterations) in 7.40 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%