Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:54:10 2013

Optimize a model with 18472 rows, 2304 columns and 56448 nonzeros
Presolve removed 1606 rows and 1162 columns
Presolve time: 0.12s
Presolved: 16866 rows, 1142 columns, 51678 nonzeros
Variable types: 24 continuous, 1118 integer (1118 binary)
Found heuristic solution: objective 45753.000000

Root relaxation: objective 3.291100e+04, 6920 iterations, 0.36 seconds

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

     0     0 32911.0000    0   13 45753.0000 32911.0000  28.1%     -    0s
H    0     0                    32921.000000 32911.0000  0.03%     -    0s
H    0     0                    32919.000000 32911.0000  0.02%     -    0s
     0     0 32911.0000    0   19 32919.0000 32911.0000  0.02%     -    0s
     0     0 32911.0000    0   16 32919.0000 32911.0000  0.02%     -    0s
     0     0 32911.0000    0   20 32919.0000 32911.0000  0.02%     -    0s
     0     2 32911.0000    0   20 32919.0000 32911.0000  0.02%     -    0s
H    1     2                    32918.000000 32911.0000  0.02%  59.0    0s
H  283   139                    32916.000000 32911.0733  0.01%  36.4    1s
H 1848   627                    32915.000000 32911.5425  0.01%  31.0    3s

Cutting planes:
  Gomory: 5
  Cover: 7
  Implied bound: 3
  MIR: 60
  GUB cover: 1
  Zero half: 15

Explored 2248 nodes (81575 simplex iterations) in 4.19 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.291500000000e+04, best bound 3.291200000000e+04, gap 0.0091%