Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:02:42 2013

Optimize a model with 60 rows, 1084 columns and 8914 nonzeros
Presolve removed 22 rows and 247 columns
Presolve time: 0.03s
Presolved: 38 rows, 837 columns, 8072 nonzeros
Variable types: 821 continuous, 16 integer (16 binary)

Root relaxation: objective 7.444602e+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 7444.60178    0    5          - 7444.60178     -      -    0s
     0     0 7446.53713    0    5          - 7446.53713     -      -    0s
     0     0 7446.54589    0    5          - 7446.54589     -      -    0s
     0     0 7457.63565    0    4          - 7457.63565     -      -    0s
     0     0 7457.63565    0    4          - 7457.63565     -      -    0s
H    0     0                    7495.1032690 7457.63565  0.50%     -    0s
     0     0 7459.10697    0    3 7495.10327 7459.10697  0.48%     -    0s
     0     0 7459.14632    0    2 7495.10327 7459.14632  0.48%     -    0s
     0     0 7459.14684    0    2 7495.10327 7459.14684  0.48%     -    0s
     0     0 7459.14684    0    2 7495.10327 7459.14684  0.48%     -    0s
     0     2 7459.14779    0    2 7495.10327 7459.14779  0.48%     -    0s
*    3     2               2    7459.1534069 7459.15341   0.0%   7.7    0s

Cutting planes:
  Gomory: 2
  Flow cover: 2

Explored 4 nodes (124 simplex iterations) in 0.15 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.459153406943e+03, best bound 7.459153406943e+03, gap 0.0%