Gurobi 5.0.1 (linux64) logging started Wed Apr 24 00:58:03 2013

Optimize a model with 15639 rows, 15249 columns and 60879 nonzeros
Presolve removed 973 rows and 0 columns
Presolve time: 0.08s
Presolved: 14666 rows, 15249 columns, 58933 nonzeros
Variable types: 15210 continuous, 39 integer (39 binary)

Root relaxation: objective 3.944112e+04, 2231 iterations, 0.16 seconds

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

     0     0 39441.1167    0    3          - 39441.1167     -      -    0s
H    0     0                    39942.000000 39441.1167  1.25%     -    0s
H    0     0                    39655.000000 39441.1167  0.54%     -    0s
     0     0 39441.9788    0    4 39655.0000 39441.9788  0.54%     -    0s
     0     0 39442.3429    0    1 39655.0000 39442.3429  0.54%     -    0s
     0     0 39442.3479    0    2 39655.0000 39442.3479  0.54%     -    0s
     0     0 39442.3479    0    3 39655.0000 39442.3479  0.54%     -    0s
     0     0 39442.3479    0    2 39655.0000 39442.3479  0.54%     -    1s
     0     0 39442.3479    0    2 39655.0000 39442.3479  0.54%     -    1s
     0     2 39443.0000    0    2 39655.0000 39443.0000  0.53%     -    1s
H    5     2                    39573.000000 39494.4375  0.20%  51.4    1s
*    6     3               5    39517.000000 39494.4375  0.06%  44.3    1s

Cutting planes:
  Gomory: 1
  Flow cover: 7

Explored 9 nodes (3862 simplex iterations) in 1.34 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.951700000000e+04, best bound 3.951700000000e+04, gap 0.0%