Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:02:43 2013

Optimize a model with 60 rows, 1084 columns and 8914 nonzeros
Presolve removed 22 rows and 257 columns
Presolve time: 0.03s
Presolved: 38 rows, 827 columns, 8052 nonzeros
Variable types: 811 continuous, 16 integer (16 binary)

Root relaxation: objective 5.420106e+03, 16 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    5          - 5420.10604     -      -    0s
     0     0 5422.90513    0    5          - 5422.90513     -      -    0s
     0     0 5422.90513    0    5          - 5422.90513     -      -    0s
H    0     0                    5452.9385562 5422.90513  0.55%     -    0s
H    0     0                    5441.6175271 5422.90513  0.34%     -    0s
     0     0 5439.53461    0    4 5441.61753 5439.53461  0.04%     -    0s
     0     0 5439.59095    0    7 5441.61753 5439.59095  0.04%     -    0s
     0     0 5439.60375    0    7 5441.61753 5439.60375  0.04%     -    0s
     0     0 5440.89230    0    6 5441.61753 5440.89230  0.01%     -    0s
     0     0 5440.89230    0    6 5441.61753 5440.89230  0.01%     -    0s
     0     2 5440.89230    0    6 5441.61753 5440.89230  0.01%     -    0s

Cutting planes:
  Implied bound: 1
  Flow cover: 1

Explored 19 nodes (139 simplex iterations) in 0.10 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.441617527064e+03, best bound 5.441256877264e+03, gap 0.0066%