Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:56:29 2013

Optimize a model with 27775 rows, 3025 columns and 84700 nonzeros
Presolve removed 2792 rows and 1541 columns
Presolve time: 0.20s
Presolved: 24983 rows, 1484 columns, 76192 nonzeros
Variable types: 24 continuous, 1460 integer (1460 binary)
Found heuristic solution: objective 62585.000000

Root relaxation: objective 4.738987e+04, 9808 iterations, 0.60 seconds

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

     0     0 47389.8667    0    8 62585.0000 47389.8667  24.3%     -    0s
H    0     0                    47404.000000 47389.8667  0.03%     -    0s
H    0     0                    47397.000000 47389.8667  0.02%     -    0s
     0     0 47390.4616    0   16 47397.0000 47390.4616  0.01%     -    0s
     0     0 47390.4616    0    6 47397.0000 47390.4616  0.01%     -    1s
     0     0 47391.0652    0   19 47397.0000 47391.0652  0.01%     -    1s
     0     0 47392.0022    0   27 47397.0000 47392.0022  0.01%     -    1s
     0     0 47392.3317    0   31 47397.0000 47392.3317  0.01%     -    1s

Cutting planes:
  Cover: 1
  MIR: 14
  Zero half: 4

Explored 0 nodes (10112 simplex iterations) in 1.09 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.739700000000e+04, best bound 4.739300000000e+04, gap 0.0084%