Gurobi 5.0.1 (linux64) logging started Sat Dec  8 02:35:12 2012

Optimize a model with 285 rows, 270 columns and 891 nonzeros
Presolve removed 21 rows and 13 columns
Presolve time: 0.00s
Presolved: 264 rows, 257 columns, 839 nonzeros
Variable types: 172 continuous, 85 integer (85 binary)

Root relaxation: objective 2.594493e+04, 128 iterations, 0.00 seconds

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

     0     0 25944.9336    0   40          - 25944.9336     -      -    0s
H    0     0                    39756.000000 25944.9336  34.7%     -    0s
     0     0 30350.1534    0   14 39756.0000 30350.1534  23.7%     -    0s
     0     0 30603.0461    0    7 39756.0000 30603.0461  23.0%     -    0s
     0     0 30706.3241    0    5 39756.0000 30706.3241  22.8%     -    0s
     0     0 30710.1515    0    9 39756.0000 30710.1515  22.8%     -    0s
H    0     0                    31211.000000 30710.1515  1.60%     -    0s
     0     2 30713.6670    0    9 31211.0000 30713.6670  1.59%     -    0s
H    2     2                    31057.000000 30715.8873  1.10%   3.0    0s
*    6     2               4    30952.000000 30715.8873  0.76%   1.7    0s
*    9     1               3    30875.000000 30715.8873  0.52%   1.4    0s

Cutting planes:
  Gomory: 9
  Cover: 1
  Flow cover: 28
  Flow path: 16

Explored 23 nodes (234 simplex iterations) in 0.02 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.087500000000e+04, best bound 3.087500000000e+04, gap 0.0%