Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:46:18 2013

Optimize a model with 56 rows, 570 columns and 4110 nonzeros
Presolve removed 22 rows and 145 columns
Presolve time: 0.01s
Presolved: 34 rows, 425 columns, 3648 nonzeros
Variable types: 411 continuous, 14 integer (14 binary)
Found heuristic solution: objective 5462.0498296

Root relaxation: objective 5.420106e+03, 14 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    4 5462.04983 5420.10604  0.77%     -    0s
     0     0 5424.00412    0    4 5462.04983 5424.00412  0.70%     -    0s
     0     0 5424.00412    0    4 5462.04983 5424.00412  0.70%     -    0s
     0     0 5439.55564    0    6 5462.04983 5439.55564  0.41%     -    0s
     0     2 5440.87997    0    6 5462.04983 5440.87997  0.39%     -    0s
H   10     8                    5442.4749060 5441.07735  0.03%   0.6    0s
*   14     9              16    5441.6169227 5441.61692   0.0%   7.5    0s

Cutting planes:
  Gomory: 5
  Flow cover: 1

Explored 15 nodes (181 simplex iterations) in 0.07 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.441616922670e+03, best bound 5.441616922670e+03, gap 0.0%