Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:55:17 2013

Optimize a model with 540 rows, 1420 columns and 3610 nonzeros
Presolve removed 30 rows and 20 columns
Presolve time: 0.01s
Presolved: 510 rows, 1400 columns, 3180 nonzeros
Variable types: 1210 continuous, 190 integer (190 binary)

Root relaxation: objective 1.937272e+04, 222 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 19445.1276    0    4          - 19445.1276     -      -    0s
     0     0 19494.7516    0    3          - 19494.7516     -      -    0s
H    0     0                    19989.100046 19494.7516  2.47%     -    0s
     0     2 19495.6299    0    3 19989.1000 19495.6299  2.47%     -    0s
H    3     3                    19525.139860 19500.2705  0.13%   1.3    0s
H    7     6                    19521.483899 19503.6886  0.09%   3.0    0s
*    8     5               7    19513.567182 19503.6886  0.05%   3.8    0s

Cutting planes:
  Gomory: 1
  Flow cover: 4

Explored 17 nodes (316 simplex iterations) in 0.07 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.951356718242e+04, best bound 1.951173184715e+04, gap 0.0094%