Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:40:35 2013

Optimize a model with 1140 rows, 2020 columns and 6010 nonzeros
Presolve removed 30 rows and 20 columns
Presolve time: 0.04s
Presolved: 1110 rows, 2000 columns, 4980 nonzeros
Variable types: 1510 continuous, 490 integer (490 binary)

Root relaxation: objective 1.997658e+04, 467 iterations, 0.01 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 20062.7285    0    4          - 20062.7285     -      -    0s
     0     0 20096.2885    0    4          - 20096.2885     -      -    0s
     0     0 20105.5937    0    4          - 20105.5937     -      -    0s
H    0     0                    20164.372088 20105.5937  0.29%     -    0s
     0     0 20105.5937    0    2 20164.3721 20105.5937  0.29%     -    0s
     0     0 20105.5937    0    4 20164.3721 20105.5937  0.29%     -    0s
     0     0 20106.4284    0    4 20164.3721 20106.4284  0.29%     -    0s
     0     2 20110.5146    0    4 20164.3721 20110.5146  0.27%     -    0s
*   45    15              20    20163.083084 20140.4988  0.11%   4.1    0s
*   62    20              12    20158.515969 20143.0294  0.08%   4.6    0s
*   98    18              14    20158.428444 20146.8382  0.06%   4.5    0s

Cutting planes:
  Flow cover: 5

Explored 154 nodes (1411 simplex iterations) in 0.24 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.015842844375e+04, best bound 2.015684267588e+04, gap 0.0079%