Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:20:34 2013

Optimize a model with 2400 rows, 107100 columns and 233100 nonzeros
Presolve removed 100 rows and 2500 columns
Presolve time: 0.27s
Presolved: 2300 rows, 104600 columns, 229100 nonzeros
Variable types: 104100 continuous, 500 integer (500 binary)

Root relaxation: objective 7.672886e+05, 5770 iterations, 0.41 seconds

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

     0     0 767288.564    0    9          - 767288.564     -      -    0s
     0     0 767327.060    0    6          - 767327.060     -      -    1s
     0     0 767327.060    0    6          - 767327.060     -      -    1s
     0     0 767327.060    0    6          - 767327.060     -      -    1s
     0     0 767327.060    0    6          - 767327.060     -      -    2s
     0     0 767327.060    0    6          - 767327.060     -      -    2s
     0     0 767327.060    0    6          - 767327.060     -      -    3s
H    0     0                    777448.83957 767327.060  1.30%     -    3s
     0     2 767335.265    0    6 777448.840 767335.265  1.30%     -    4s
     1     3 767638.484    1    3 777448.840 767638.484  1.26%   618    5s
*   21     8              20    768346.06878 767638.484  0.09%  63.2    7s

Cutting planes:
  Flow cover: 6

Explored 57 nodes (10393 simplex iterations) in 8.99 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.683460687757e+05, best bound 7.682753751390e+05, gap 0.0092%