Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:02:49 2013

Optimize a model with 60 rows, 462 columns and 4136 nonzeros
Presolve removed 22 rows and 33 columns
Presolve time: 0.01s
Presolved: 38 rows, 429 columns, 3672 nonzeros
Variable types: 413 continuous, 16 integer (16 binary)

Root relaxation: objective 5.420106e+03, 12 iterations, 0.00 seconds

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

     0     0 5420.10604    0    3          - 5420.10604     -      -    0s
     0     0 5422.90513    0    3          - 5422.90513     -      -    0s
     0     0 5440.74926    0    3          - 5440.74926     -      -    0s
     0     0 5441.26655    0    3          - 5441.26655     -      -    0s
     0     0 5441.26655    0    3          - 5441.26655     -      -    0s
H    0     0                    5452.9385562 5441.26655  0.21%     -    0s
     0     0 5441.26655    0    2 5452.93856 5441.26655  0.21%     -    0s
     0     0 5441.29311    0    4 5452.93856 5441.29311  0.21%     -    0s
     0     0 5441.29405    0    5 5452.93856 5441.29405  0.21%     -    0s
     0     0 5441.50717    0    3 5452.93856 5441.50717  0.21%     -    0s
     0     2 5441.50945    0    3 5452.93856 5441.50945  0.21%     -    0s
*    6     3               5    5442.4754513 5441.61315  0.02%   2.7    0s
*   11     3               4    5441.6175271 5441.61323  0.00%   2.2    0s

Cutting planes:
  Cover: 2
  Implied bound: 1

Explored 12 nodes (97 simplex iterations) in 0.05 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.441617527064e+03, best bound 5.441613226804e+03, gap 0.0001%