Gurobi 5.0.1 (linux64) logging started Fri Jan 18 05:40:27 2013

Optimize a model with 320 rows, 6120 columns and 57310 nonzeros
Presolve removed 10 rows and 10 columns
Presolve time: 0.11s
Presolved: 310 rows, 6110 columns, 52300 nonzeros
Variable types: 6020 continuous, 90 integer (90 binary)

Root relaxation: objective 1.791602e+04, 135 iterations, 0.01 seconds

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

     0     0 17916.0191    0    9          - 17916.0191     -      -    0s
     0     0 17916.2335    0    9          - 17916.2335     -      -    0s
     0     0 17916.2822    0    9          - 17916.2822     -      -    0s
     0     0 17916.3553    0    9          - 17916.3553     -      -    0s
     0     0 17916.3553    0   11          - 17916.3553     -      -    0s
     0     0 17920.1222    0    6          - 17920.1222     -      -    0s
     0     0 17920.1222    0    6          - 17920.1222     -      -    0s
     0     2 17920.3617    0    6          - 17920.3617     -      -    1s
*   17    12              16    17984.798280 17926.9279  0.32%   6.5    1s
*   73    32              19    17984.584745 17978.3871  0.03%   3.8    1s
*   76    30              19    17984.572966 17978.3871  0.03%   3.7    1s
*  126    24              15    17984.277259 17979.7123  0.03%   3.1    1s
*  136    24              13    17984.261478 17979.7272  0.03%   3.0    1s

Cutting planes:
  Flow cover: 5

Explored 186 nodes (829 simplex iterations) in 1.70 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.798426147796e+04, best bound 1.798322782159e+04, gap 0.0057%