Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:17:35 2013

Optimize a model with 2078 rows, 71848 columns and 3816722 nonzeros
Presolve removed 20 rows and 0 columns
Presolve time: 4.36s
Presolved: 2058 rows, 71848 columns, 3815863 nonzeros
Variable types: 0 continuous, 71848 integer (71848 binary)
Found heuristic solution: objective 36479.000000

Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
    7584    2.6732105e+04   6.755205e+03   0.000000e+00      5s
   11445    2.7104700e+04   4.241379e+02   0.000000e+00     10s
   14448    2.7203334e+04   4.450599e+02   0.000000e+00     15s
   16307    2.7227962e+04   2.771857e+02   0.000000e+00     20s
   16450    2.7228500e+04   0.000000e+00   0.000000e+00     21s

Root relaxation: objective 2.722850e+04, 16450 iterations, 20.65 seconds

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

     0     0 27228.5000    0   70 36479.0000 27228.5000  25.4%     -   26s
H    0     0                    27257.000000 27228.5000  0.10%     -   27s
*    0     0               0    27233.000000 27233.0000   0.0%     -   31s

Cutting planes:
  Clique: 1
  Zero half: 1

Explored 0 nodes (18481 simplex iterations) in 31.61 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.723299999989e+04, best bound 2.723299999989e+04, gap 0.0%