Gurobi 5.0.1 (linux64) logging started Thu Jan 17 23:16:18 2013

Optimize a model with 160 rows, 1060 columns and 2140 nonzeros
Presolve removed 10 rows and 10 columns
Presolve time: 0.00s
Presolved: 150 rows, 1050 columns, 2110 nonzeros
Variable types: 1040 continuous, 10 integer (10 binary)

Root relaxation: objective 1.997658e+04, 115 iterations, 0.00 seconds

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

     0     0 19976.5790    0    2          - 19976.5790     -      -    0s
     0     0 20021.0634    0    2          - 20021.0634     -      -    0s
     0     0 20032.8238    0    2          - 20032.8238     -      -    0s
     0     0 20035.6942    0    2          - 20035.6942     -      -    0s
     0     0 20037.0752    0    2          - 20037.0752     -      -    0s
     0     0 20037.0813    0    2          - 20037.0813     -      -    0s
     0     0 20038.6893    0    2          - 20038.6893     -      -    0s
     0     0 20092.3110    0    1          - 20092.3110     -      -    0s
     0     0 20092.3110    0    1          - 20092.3110     -      -    0s
H    0     0                    20148.623128 20092.3110  0.28%     -    0s
     0     0     cutoff    0      20148.6231 20148.6231   0.0%     -    0s

Cutting planes:
  Flow cover: 1

Explored 1 nodes (227 simplex iterations) in 0.03 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.014862312802e+04, best bound 2.014862312802e+04, gap 0.0%