Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:40:44 2013

Optimize a model with 660 rows, 2030 columns and 5550 nonzeros
Presolve removed 10 rows and 10 columns
Presolve time: 0.04s
Presolved: 650 rows, 2020 columns, 5040 nonzeros
Variable types: 1520 continuous, 500 integer (500 binary)

Root relaxation: objective 1.937272e+04, 128 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    4          - 19372.7157     -      -    0s
     0     0 19411.0144    0    4          - 19411.0144     -      -    0s
     0     0 19422.8754    0    4          - 19422.8754     -      -    0s
     0     0 19423.3702    0    4          - 19423.3702     -      -    0s
     0     0 19423.8281    0    4          - 19423.8281     -      -    0s
     0     0 19424.2490    0    5          - 19424.2490     -      -    0s
     0     0 19424.5024    0    4          - 19424.5024     -      -    0s
     0     0 19424.6130    0    5          - 19424.6130     -      -    0s
     0     0 19424.6205    0    4          - 19424.6205     -      -    0s
     0     0 19424.7433    0    7          - 19424.7433     -      -    0s
     0     0 19424.7433    0    7          - 19424.7433     -      -    0s
H    0     0                    19988.398176 19424.7433  2.82%     -    0s
     0     2 19424.7433    0    7 19988.3982 19424.7433  2.82%     -    0s
*   26     6              14    19513.720614 19513.7206   0.0%   8.8    0s

Cutting planes:
  Gomory: 2
  Implied bound: 12
  Flow cover: 2

Explored 27 nodes (591 simplex iterations) in 0.26 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.951372061361e+04, best bound 1.951372061361e+04, gap 0.0%