Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:46:25 2013

Optimize a model with 570 rows, 1760 columns and 4505 nonzeros
Presolve removed 10 rows and 15 columns
Presolve time: 0.05s
Presolved: 560 rows, 1745 columns, 3490 nonzeros
Variable types: 1250 continuous, 495 integer (495 binary)

Root relaxation: objective 9.876190e+03, 42 iterations, 0.00 seconds

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

     0     0 9876.18952    0    1          - 9876.18952     -      -    0s
     0     0 9877.18063    0    3          - 9877.18063     -      -    0s
     0     0 9877.31331    0    3          - 9877.31331     -      -    0s
H    0     0                    10117.269614 9877.31331  2.37%     -    0s
     0     2 9879.57373    0    3 10117.2696 9879.57373  2.35%     -    0s
H   27    26                    9943.3557777 9916.80436  0.27%   1.6    0s
*   31    28              21    9942.9596239 9916.80436  0.26%   1.5    0s

Cutting planes:
  Gomory: 1
  Flow cover: 4

Explored 184 nodes (574 simplex iterations) in 0.23 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 9.942959623924e+03, best bound 9.942223282717e+03, gap 0.0074%