Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:55:19 2013

Optimize a model with 340 rows, 1620 columns and 3610 nonzeros
Presolve removed 20 rows and 30 columns
Presolve time: 0.01s
Presolved: 320 rows, 1590 columns, 3180 nonzeros
Variable types: 1400 continuous, 190 integer (190 binary)

Root relaxation: objective 1.937272e+04, 102 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 19383.6449    0    4          - 19383.6449     -      -    0s
     0     0 19384.7097    0    4          - 19384.7097     -      -    0s
     0     0 19384.8474    0    4          - 19384.8474     -      -    0s
     0     0 19384.8474    0    4          - 19384.8474     -      -    0s
H    0     0                    19730.526132 19384.8474  1.75%     -    0s
     0     2 19391.7259    0    4 19730.5261 19391.7259  1.72%     -    0s
*   20    20              17    19606.103481 19449.1495  0.80%   3.9    0s
H   27    14                    19575.926612 19450.2221  0.64%   3.7    0s
*   33    15              11    19546.883249 19450.2221  0.49%   3.5    0s
*   45    13               9    19525.233584 19457.5351  0.35%   3.3    0s
*   49     9               9    19521.708966 19457.5351  0.33%   3.2    0s
*   54     8               4    19514.108643 19495.4271  0.10%   3.7    0s
H   55     7                    19513.567182 19495.4271  0.09%   3.7    0s

Cutting planes:
  Gomory: 2
  Flow cover: 4

Explored 63 nodes (384 simplex iterations) in 0.12 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.951356718242e+04, best bound 1.951356718242e+04, gap 0.0%