Gurobi 5.0.1 (linux64) logging started Fri Jan 18 07:42:17 2013

Optimize a model with 680 rows, 45200 columns and 528420 nonzeros
Presolve removed 20 rows and 980 columns
Presolve time: 1.60s
Presolved: 660 rows, 44220 columns, 488420 nonzeros
Variable types: 44020 continuous, 200 integer (200 binary)

Root relaxation: objective 4.636776e+04, 545 iterations, 0.06 seconds

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

     0     0 46367.7551    0   16          - 46367.7551     -      -    2s
     0     0 46368.0262    0   16          - 46368.0262     -      -    2s
     0     0 46368.0262    0   16          - 46368.0262     -      -    3s
     0     2 46369.2479    0   16          - 46369.2479     -      -   10s
*  161   159             142    48712.217028 46377.0101  4.79%   4.3   12s
H  189   157                    47229.868173 46379.7093  1.80%   5.3   13s
*  206    45              34    46710.097302 46379.7093  0.71%   5.0   13s
H  216    28                    46659.311550 46381.6784  0.60%   5.2   13s
H  297    18                    46653.880440 46401.9829  0.54%   5.1   15s

Cutting planes:
  Flow cover: 2

Explored 327 nodes (3008 simplex iterations) in 15.68 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.665388044006e+04, best bound 4.665072345681e+04, gap 0.0068%