Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:18:12 2013

Optimize a model with 1562 rows, 53464 columns and 2100783 nonzeros
Presolve removed 23 rows and 0 columns
Presolve time: 2.65s
Presolved: 1539 rows, 53464 columns, 2099885 nonzeros
Variable types: 0 continuous, 53464 integer (53464 binary)
Found heuristic solution: objective 28965.000000

Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
    9197    1.7293193e+04   2.622226e+02   0.000000e+00      5s
   13327    1.7454713e+04   4.615395e+02   0.000000e+00     10s
   15339    1.7475000e+04   0.000000e+00   0.000000e+00     14s

Root relaxation: objective 1.747500e+04, 15339 iterations, 13.88 seconds

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

*    0     0               0    17475.000000 17475.0000   0.0%     -   16s

Explored 0 nodes (15339 simplex iterations) in 16.95 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.747500000000e+04, best bound 1.747500000000e+04, gap 0.0%