Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:46:59 2013

Optimize a model with 280 rows, 3650 columns and 22150 nonzeros
Presolve removed 10 rows and 570 columns
Presolve time: 0.03s
Presolved: 270 rows, 3080 columns, 20150 nonzeros
Variable types: 3010 continuous, 70 integer (70 binary)

Root relaxation: objective 1.997658e+04, 125 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    8          - 19976.5790     -      -    0s
     0     0 19977.7475    0    8          - 19977.7475     -      -    0s
     0     0 19991.5252    0    7          - 19991.5252     -      -    0s
     0     0 19991.5252    0    7          - 19991.5252     -      -    0s
H    0     0                    20900.679534 19991.5252  4.35%     -    0s
     0     2 19991.5252    0    7 20900.6795 19991.5252  4.35%     -    0s
*    8     6               7    20165.762362 20145.4171  0.10%  15.0    0s
*   19     3               9    20158.529776 20156.6663  0.01%   7.7    0s

Cutting planes:
  Flow cover: 1

Explored 20 nodes (561 simplex iterations) in 0.26 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.015852977591e+04, best bound 2.015666628356e+04, gap 0.0092%