Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:57:46 2013

Optimize a model with 34279 rows, 3481 columns and 104430 nonzeros
Presolve removed 3799 rows and 1784 columns
Presolve time: 0.25s
Presolved: 30480 rows, 1697 columns, 92725 nonzeros
Variable types: 23 continuous, 1674 integer (1674 binary)
Found heuristic solution: objective 70243.000000

Root relaxation: objective 5.378680e+04, 6881 iterations, 0.52 seconds

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

     0     0 53786.8045    0    9 70243.0000 53786.8045  23.4%     -    0s
H    0     0                    53806.000000 53786.8045  0.04%     -    0s
H    0     0                    53797.000000 53786.8045  0.02%     -    0s
H    0     0                    53794.000000 53786.8045  0.01%     -    0s
     0     0 53787.7563    0   15 53794.0000 53787.7563  0.01%     -    1s
     0     0 53787.7563    0    6 53794.0000 53787.7563  0.01%     -    1s
     0     0 53788.1871    0   19 53794.0000 53788.1871  0.01%     -    1s
H    0     0                    53791.000000 53788.1871  0.01%     -    1s

Cutting planes:
  Gomory: 2
  Cover: 1
  MIR: 5

Explored 0 nodes (7009 simplex iterations) in 1.18 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.379100000000e+04, best bound 5.378900000000e+04, gap 0.0037%