Gurobi 5.0.1 (linux64) logging started Wed Apr 24 00:52:48 2013

Optimize a model with 286 rows, 6786 columns and 13546 nonzeros
Presolve time: 0.01s
Presolved: 286 rows, 6786 columns, 13546 nonzeros
Variable types: 6760 continuous, 26 integer (26 binary)

Root relaxation: objective 3.175381e+04, 489 iterations, 0.01 seconds

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

     0     0 31753.8128    0    2          - 31753.8128     -      -    0s
H    0     0                    31831.000000 31753.8128  0.24%     -    0s
     0     0     cutoff    0      31831.0000 31831.0000   0.0%     -    0s

Cutting planes:
  Implied bound: 43
  Flow cover: 1

Explored 0 nodes (505 simplex iterations) in 0.04 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.183100000000e+04, best bound 3.183100000000e+04, gap 0.0%