Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:55:29 2013

Optimize a model with 24857 rows, 2809 columns and 75843 nonzeros
Presolve removed 3188 rows and 1448 columns
Presolve time: 0.18s
Presolved: 21669 rows, 1361 columns, 65957 nonzeros
Variable types: 19 continuous, 1342 integer (1342 binary)
Found heuristic solution: objective 66095.000000

Root relaxation: objective 5.313928e+04, 5235 iterations, 0.29 seconds

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

     0     0 53139.2763    0    7 66095.0000 53139.2763  19.6%     -    0s
H    0     0                    53169.000000 53139.2763  0.06%     -    0s
H    0     0                    53158.000000 53139.2763  0.04%     -    0s
     0     0 53140.9865    0   22 53158.0000 53140.9865  0.03%     -    0s
     0     0 53140.9865    0   12 53158.0000 53140.9865  0.03%     -    0s
     0     0 53141.0397    0   25 53158.0000 53141.0397  0.03%     -    0s
     0     2 53141.9100    0   23 53158.0000 53141.9100  0.03%     -    0s
H    1     2                    53154.000000 53141.9100  0.02%   0.0    0s
H   10     7                    53152.000000 53143.3101  0.02%   0.0    1s

Cutting planes:
  Gomory: 13
  Cover: 2
  Implied bound: 8
  Clique: 2
  MIR: 38
  Zero half: 11

Explored 393 nodes (12030 simplex iterations) in 1.37 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.315200000000e+04, best bound 5.314700000000e+04, gap 0.0094%