Gurobi 5.0.1 (linux64) logging started Fri Jan 18 07:08:46 2013

Optimize a model with 68 rows, 2066 columns and 24148 nonzeros
Presolve removed 22 rows and 30 columns
Presolve time: 0.08s
Presolved: 46 rows, 2036 columns, 22090 nonzeros
Variable types: 2016 continuous, 20 integer (20 binary)

Root relaxation: objective 7.659086e+03, 13 iterations, 0.00 seconds

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

     0     0 7659.08578    0    3          - 7659.08578     -      -    0s
     0     0 7659.42868    0    3          - 7659.42868     -      -    0s
     0     0 7663.78051    0    3          - 7663.78051     -      -    0s
     0     0 7664.32404    0    3          - 7664.32404     -      -    0s
     0     0 7664.53428    0    3          - 7664.53428     -      -    0s
     0     0 7664.62872    0    3          - 7664.62872     -      -    0s
     0     0 7664.62872    0    3          - 7664.62872     -      -    0s
H    0     0                    7668.9421049 7664.62872  0.06%     -    0s
     0     0 7664.62872    0    2 7668.94210 7664.62872  0.06%     -    0s
     0     0 7664.63004    0    4 7668.94210 7664.63004  0.06%     -    0s
     0     2 7664.63441    0    4 7668.94210 7664.63441  0.06%     -    0s
H    7     6                    7664.8067361 7664.63441  0.00%   0.9    0s

Cutting planes:
  Gomory: 1
  Cover: 1
  Implied bound: 1
  Flow cover: 2

Explored 7 nodes (137 simplex iterations) in 0.48 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.664806736061e+03, best bound 7.664634407493e+03, gap 0.0022%