Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:50:34 2013

Optimize a model with 560 rows, 6200 columns and 26500 nonzeros
Presolve removed 20 rows and 20 columns
Presolve time: 0.04s
Presolved: 540 rows, 6180 columns, 24480 nonzeros
Variable types: 6040 continuous, 140 integer (140 binary)

Root relaxation: objective 4.642213e+04, 546 iterations, 0.01 seconds

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

     0     0 46422.1265    0    9          - 46422.1265     -      -    0s
     0     0 46424.1792    0    6          - 46424.1792     -      -    0s
     0     0 46424.3177    0    9          - 46424.3177     -      -    0s
     0     0 46424.3460    0    9          - 46424.3460     -      -    0s
     0     0 46424.3460    0    9          - 46424.3460     -      -    0s
     0     0 46424.3460    0    9          - 46424.3460     -      -    0s
     0     0 46424.3460    0    9          - 46424.3460     -      -    0s
H    0     0                    52207.703233 46424.3460  11.1%     -    0s
     0     2 46426.2249    0    9 52207.7032 46426.2249  11.1%     -    0s
*   19    13              16    46846.549738 46458.7102  0.83%  16.2    0s
H   27     7                    46743.805835 46526.3510  0.47%  17.1    0s

Cutting planes:
  Flow cover: 6

Explored 48 nodes (1637 simplex iterations) in 0.64 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.674380583461e+04, best bound 4.674295051102e+04, gap 0.0018%