Gurobi 5.0.1 (linux64) logging started Wed Apr 24 00:53:31 2013

Optimize a model with 319 rows, 8439 columns and 16849 nonzeros
Presolve time: 0.01s
Presolved: 319 rows, 8439 columns, 16849 nonzeros
Variable types: 8410 continuous, 29 integer (29 binary)

Root relaxation: objective 3.141697e+04, 423 iterations, 0.01 seconds

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

     0     0 31416.9731    0    4          - 31416.9731     -      -    0s
H    0     0                    31629.000000 31416.9731  0.67%     -    0s
     0     0 31617.7579    0    1 31629.0000 31617.7579  0.04%     -    0s
     0     0 31617.8136    0    1 31629.0000 31617.8136  0.04%     -    0s
     0     0 31617.8136    0    4 31629.0000 31617.8136  0.04%     -    0s
     0     0 31617.8136    0    1 31629.0000 31617.8136  0.04%     -    0s
     0     0 31618.4237    0    1 31629.0000 31618.4237  0.03%     -    0s
     0     0 31622.5932    0    1 31629.0000 31622.5932  0.02%     -    0s
     0     0 31622.5932    0    1 31629.0000 31622.5932  0.02%     -    0s
     0     0 31622.8105    0    1 31629.0000 31622.8105  0.02%     -    0s

Cutting planes:
  Implied bound: 37
  Flow cover: 4

Explored 0 nodes (812 simplex iterations) in 0.14 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.162900000000e+04, best bound 3.162900000000e+04, gap 0.0%