Gurobi 5.0.1 (linux64) logging started Fri Jan 18 07:08:07 2013

Optimize a model with 68 rows, 4160 columns and 52122 nonzeros
Presolve removed 22 rows and 129 columns
Presolve time: 0.62s
Presolved: 46 rows, 4031 columns, 48060 nonzeros
Variable types: 4011 continuous, 20 integer (20 binary)

Root relaxation: objective 5.420106e+03, 22 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    8          - 5420.10604     -      -    0s
     0     0 5421.38325    0    8          - 5421.38325     -      -    0s
     0     0 5421.38325    0    8          - 5421.38325     -      -    0s
H    0     0                    5458.4847480 5421.38325  0.68%     -    0s
     0     0 5441.36327    0    5 5458.48475 5441.36327  0.31%     -    0s
     0     0 5441.36810    0    5 5458.48475 5441.36810  0.31%     -    0s
H    0     0                    5457.9905710 5441.36810  0.30%     -    0s
     0     2 5441.52871    0    5 5457.99057 5441.52871  0.30%     -    0s
*   47    15              19    5445.2743024 5441.60944  0.07%   5.7    0s
*   54     3              17    5441.6179642 5441.61606  0.00%   5.2    0s

Cutting planes:
  Gomory: 5

Explored 55 nodes (376 simplex iterations) in 0.95 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.441617964219e+03, best bound 5.441616058837e+03, gap 0.0000%