Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:40:48 2013

Optimize a model with 260 rows, 1590 columns and 6220 nonzeros
Presolve removed 10 rows and 10 columns
Presolve time: 0.01s
Presolved: 250 rows, 1580 columns, 5710 nonzeros
Variable types: 1520 continuous, 60 integer (60 binary)

Root relaxation: objective 1.791602e+04, 128 iterations, 0.00 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 17918.0408    0   12          - 17918.0408     -      -    0s
     0     0 17918.6545    0   12          - 17918.6545     -      -    0s
     0     0 17919.0323    0    8          - 17919.0323     -      -    0s
     0     0 17919.0323    0    7          - 17919.0323     -      -    0s
H    0     0                    18063.838414 17919.0323  0.80%     -    0s
     0     2 17962.3732    0    6 18063.8384 17962.3732  0.56%     -    0s
*    9     8               9    17984.200283 17964.2665  0.11%   4.9    0s

Cutting planes:
  Gomory: 1
  Flow cover: 5

Explored 21 nodes (316 simplex iterations) in 0.06 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.798420028333e+04, best bound 1.798317914302e+04, gap 0.0057%