Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:00:17 2013

Optimize a model with 18102 rows, 17682 columns and 70602 nonzeros
Presolve removed 885 rows and 0 columns
Presolve time: 0.10s
Presolved: 17217 rows, 17682 columns, 68832 nonzeros
Variable types: 17640 continuous, 42 integer (42 binary)

Root relaxation: objective 3.847770e+04, 2155 iterations, 0.15 seconds

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

     0     0 38477.6991    0    4          - 38477.6991     -      -    0s
H    0     0                    39508.000000 38477.6991  2.61%     -    0s
     0     0 38481.3932    0    6 39508.0000 38481.3932  2.60%     -    0s
     0     0 38481.5889    0    6 39508.0000 38481.5889  2.60%     -    0s
     0     0 38481.5909    0    7 39508.0000 38481.5909  2.60%     -    0s
H    0     0                    38739.000000 38481.5909  0.66%     -    0s
     0     2 38492.1186    0    7 38739.0000 38492.1186  0.64%     -    1s

Cutting planes:
  Gomory: 2
  Flow cover: 3

Explored 8 nodes (2598 simplex iterations) in 1.30 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.873900000000e+04, best bound 3.873900000000e+04, gap 0.0%