Gurobi 5.0.1 (linux64) logging started Sat Dec  8 02:35:13 2012

Optimize a model with 285 rows, 270 columns and 889 nonzeros
Presolve removed 28 rows and 17 columns
Presolve time: 0.00s
Presolved: 257 rows, 253 columns, 837 nonzeros
Variable types: 169 continuous, 84 integer (84 binary)

Root relaxation: objective 2.709884e+04, 133 iterations, 0.00 seconds

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

     0     0 27098.8419    0   46          - 27098.8419     -      -    0s
H    0     0                    39160.000000 27098.8419  30.8%     -    0s
     0     0 31619.8872    0   19 39160.0000 31619.8872  19.3%     -    0s
H    0     0                    35346.000000 31619.8872  10.5%     -    0s
     0     0 31703.1087    0   13 35346.0000 31703.1087  10.3%     -    0s
     0     0 31774.4744    0    7 35346.0000 31774.4744  10.1%     -    0s
     0     2 31778.7198    0    7 35346.0000 31778.7198  10.1%     -    0s
*    2     2               2    31817.000000 31791.5517  0.08%   4.0    0s

Cutting planes:
  Gomory: 6
  Clique: 2
  Flow cover: 28
  Flow path: 16

Explored 6 nodes (236 simplex iterations) in 0.09 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.181700000000e+04, best bound 3.181700000000e+04, gap 0.0%