Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:40:33 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 1.937272e+04, 425 iterations, 0.00 seconds

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

     0     0 19372.7157    0    2          - 19372.7157     -      -    0s
     0     0 19445.2978    0    4          - 19445.2978     -      -    0s
     0     0 19494.9761    0    3          - 19494.9761     -      -    0s
     0     2 19495.2837    0    3          - 19495.2837     -      -    0s
H   15    13                    19518.687011 19503.7766  0.08%   3.1    0s
*   16    11              13    19514.510092 19503.7766  0.06%   6.7    0s
*   21     8              14    19513.935414 19503.7766  0.05%   5.9    0s
*   22     6              13    19513.720614 19503.7766  0.05%   6.0    0s

Cutting planes:
  Gomory: 2
  Flow cover: 3

Explored 57 nodes (698 simplex iterations) in 0.21 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.951372061361e+04, best bound 1.951222294959e+04, gap 0.0077%