Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:47:11 2013

Optimize a model with 280 rows, 2100 columns and 11250 nonzeros
Presolve removed 10 rows and 10 columns
Presolve time: 0.01s
Presolved: 270 rows, 2090 columns, 10240 nonzeros
Variable types: 2020 continuous, 70 integer (70 binary)

Root relaxation: objective 1.997658e+04, 148 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 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                    20903.918899 19991.5252  4.36%     -    0s
     0     2 19991.5252    0    7 20903.9189 19991.5252  4.36%     -    0s
*   12     7              10    20161.050728 20152.6456  0.04%   9.1    0s
*   18     4              10    20158.529776 20152.6456  0.03%   6.5    0s
*   27     5              12    20158.445957 20156.4699  0.01%   5.0    0s

Cutting planes:
  Gomory: 1
  Flow cover: 1

Explored 28 nodes (468 simplex iterations) in 0.14 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.015844595680e+04, best bound 2.015646986638e+04, gap 0.0098%