Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:16:08 2013

Optimize a model with 520 rows, 4460 columns and 9500 nonzeros
Presolve removed 40 rows and 40 columns
Presolve time: 0.02s
Presolved: 480 rows, 4420 columns, 9360 nonzeros
Variable types: 4240 continuous, 180 integer (180 binary)

Root relaxation: objective 4.636776e+04, 538 iterations, 0.01 seconds

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

     0     0 46367.7551    0    2          - 46367.7551     -      -    0s
     0     0 46393.0891    0    2          - 46393.0891     -      -    0s
     0     0 46394.7301    0    2          - 46394.7301     -      -    0s
     0     0 46394.7301    0    2          - 46394.7301     -      -    0s
H    0     0                    46832.519780 46394.7301  0.93%     -    0s
     0     2 46397.0475    0    2 46832.5198 46397.0475  0.93%     -    0s
*    6     4               5    46652.929898 46516.6038  0.29%  21.0    0s

Cutting planes:
  Gomory: 1
  Flow cover: 4

Explored 14 nodes (750 simplex iterations) in 0.14 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.665292989755e+04, best bound 4.665292989755e+04, gap 0.0%