Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:16:18 2013

Optimize a model with 2600 rows, 113600 columns and 291300 nonzeros
Presolve removed 100 rows and 2900 columns
Presolve time: 0.37s
Presolved: 2500 rows, 110700 columns, 281300 nonzeros
Variable types: 110100 continuous, 600 integer (600 binary)

Root relaxation: objective 7.672886e+05, 5840 iterations, 0.39 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     -      -    1s
     0     0 767328.491    0    6          - 767328.491     -      -    1s
     0     0 767328.491    0    6          - 767328.491     -      -    1s
     0     0 767328.491    0    6          - 767328.491     -      -    2s
     0     0 767328.491    0    6          - 767328.491     -      -    2s
     0     0 767328.491    0    6          - 767328.491     -      -    2s
     0     0 767328.491    0    6          - 767328.491     -      -    3s
     0     0 767328.491    0    6          - 767328.491     -      -    5s
H    0     0                    779352.98914 767328.491  1.54%     -    5s
     0     2 767336.603    0    6 779352.989 767336.603  1.54%     -    8s
     5     7 767680.241    3    2 779352.989 767589.151  1.51%   255   10s
*   26     7              23    768348.43892 767589.151  0.10%  74.5   13s
    32     4 767945.247    5    6 768348.439 767711.874  0.08%  72.4   15s

Cutting planes:
  Flow cover: 5

Explored 100 nodes (12013 simplex iterations) in 18.25 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.683484389204e+05, best bound 7.682753218839e+05, gap 0.0095%