Gurobi 5.0.1 (linux64) logging started Wed Apr 24 00:53:17 2013

Optimize a model with 308 rows, 7868 columns and 15708 nonzeros
Presolve time: 0.01s
Presolved: 308 rows, 7868 columns, 15708 nonzeros
Variable types: 7840 continuous, 28 integer (28 binary)

Root relaxation: objective 3.164862e+04, 518 iterations, 0.01 seconds

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

     0     0 31648.6242    0    3          - 31648.6242     -      -    0s
H    0     0                    31849.000000 31648.6242  0.63%     -    0s
     0     0 31848.1250    0    1 31849.0000 31848.1250  0.00%     -    0s

Cutting planes:
  Implied bound: 31
  Flow cover: 3

Explored 0 nodes (560 simplex iterations) in 0.04 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.184900000000e+04, best bound 3.184812500000e+04, gap 0.0027%