Gurobi 5.0.1 (linux64) logging started Fri Jan 18 05:40:23 2013

Optimize a model with 320 rows, 6120 columns and 57310 nonzeros
Presolve removed 10 rows and 10 columns
Presolve time: 0.20s
Presolved: 310 rows, 6110 columns, 52300 nonzeros
Variable types: 6020 continuous, 90 integer (90 binary)

Root relaxation: objective 1.937272e+04, 114 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    6          - 19372.7157     -      -    0s
     0     0 19372.9261    0    6          - 19372.9261     -      -    0s
     0     0 19438.2772    0    6          - 19438.2772     -      -    0s
     0     0 19444.5528    0    6          - 19444.5528     -      -    0s
     0     0 19444.5528    0    6          - 19444.5528     -      -    0s
     0     2 19444.6042    0    6          - 19444.6042     -      -    1s
*   27    17              23    19522.485200 19444.6042  0.40%   6.6    1s
H   29    13                    19518.969319 19444.6042  0.38%   6.1    1s
*   53    26              22    19517.198939 19502.9951  0.07%   5.1    1s
H   57    22                    19516.894093 19502.9951  0.07%   4.8    1s
*   90    24              15    19514.313057 19508.4934  0.03%   4.2    1s
*  105    26              15    19513.940936 19508.6259  0.03%   3.9    1s

Cutting planes:
  Flow cover: 1

Explored 126 nodes (810 simplex iterations) in 1.50 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.951394093591e+04, best bound 1.951217121461e+04, gap 0.0091%