Gurobi 5.0.1 (linux64) logging started Mon Feb  4 16:59:43 2013

Optimize a model with 1683 rows, 45015 columns and 2436355 nonzeros
Presolve removed 19 rows and 0 columns
Presolve time: 3.06s
Presolved: 1664 rows, 45015 columns, 2435867 nonzeros
Variable types: 0 continuous, 45015 integer (45015 binary)
Found heuristic solution: objective 23497.000000

Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
    7408    1.7459473e+04   8.527865e+01   0.000000e+00      5s
    9741    1.7518000e+04   0.000000e+00   0.000000e+00      9s

Root relaxation: objective 1.751800e+04, 9741 iterations, 8.74 seconds

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

*    0     0               0    17518.000000 17518.0000   0.0%     -   12s

Explored 0 nodes (9741 simplex iterations) in 12.22 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.751800000000e+04, best bound 1.751800000000e+04, gap 0.0%