Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:43:06 2013

Optimize a model with 9919 rows, 1521 columns and 30420 nonzeros
Presolve removed 1320 rows and 776 columns
Presolve time: 0.07s
Presolved: 8599 rows, 745 columns, 26513 nonzeros
Variable types: 20 continuous, 725 integer (725 binary)
Found heuristic solution: objective 27447.000000

Root relaxation: objective 1.967695e+04, 4509 iterations, 0.18 seconds

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

     0     0 19676.9545    0   14 27447.0000 19676.9545  28.3%     -    0s
H    0     0                    19685.000000 19676.9545  0.04%     -    0s
     0     0 19676.9545    0   21 19685.0000 19676.9545  0.04%     -    0s
     0     0 19676.9545    0   14 19685.0000 19676.9545  0.04%     -    0s
     0     0 19677.0563    0   33 19685.0000 19677.0563  0.04%     -    0s
     0     2 19677.4922    0   33 19685.0000 19677.4922  0.04%     -    0s
H    1     2                    19684.000000 19677.4922  0.03%  11.0    0s
H  131    61                    19683.000000 19678.3478  0.02%   7.4    0s
H  389   116                    19682.000000 19678.5791  0.02%   5.6    0s

Cutting planes:
  Cover: 1
  MIR: 4

Explored 3403 nodes (22912 simplex iterations) in 1.04 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.968200000000e+04, best bound 1.968100000000e+04, gap 0.0051%