Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:55:25 2013

Optimize a model with 240 rows, 1280 columns and 3590 nonzeros
Presolve removed 10 rows and 10 columns
Presolve time: 0.00s
Presolved: 230 rows, 1270 columns, 3380 nonzeros
Variable types: 1220 continuous, 50 integer (50 binary)

Root relaxation: objective 1.997658e+04, 135 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    6          - 19976.5790     -      -    0s
     0     0 19982.2917    0    8          - 19982.2917     -      -    0s
     0     0 19982.7430    0    8          - 19982.7430     -      -    0s
     0     0 20138.2700    0    6          - 20138.2700     -      -    0s
     0     0 20138.2700    0    6          - 20138.2700     -      -    0s
H    0     0                    20317.269858 20138.2700  0.88%     -    0s
     0     2 20138.2700    0    6 20317.2699 20138.2700  0.88%     -    0s
*    5     4               5    20160.951892 20138.2700  0.11%  12.6    0s
*   10     4               7    20158.174631 20138.2700  0.10%   7.0    0s

Cutting planes:
  Flow cover: 2

Explored 15 nodes (404 simplex iterations) in 0.04 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.015817463139e+04, best bound 2.015817463139e+04, gap 0.0%