Gurobi 5.0.1 (linux64) logging started Mon Feb  4 16:50:42 2013

Optimize a model with 1551 rows, 40111 columns and 2093814 nonzeros
Presolve removed 47 rows and 355 columns (presolve time = 5s) ...
Presolve removed 47 rows and 355 columns
Presolve time: 6.08s
Presolved: 1504 rows, 39756 columns, 2072945 nonzeros
Variable types: 0 continuous, 39756 integer (39756 binary)
Found heuristic solution: objective 19744.000000

Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
    8203    1.5492543e+04   3.729891e+02   0.000000e+00      5s
    9365    1.5517000e+04   0.000000e+00   0.000000e+00      7s

Root relaxation: objective 1.551700e+04, 9365 iterations, 6.76 seconds

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

*    0     0               0    15517.000000 15517.0000   0.0%     -   13s

Explored 0 nodes (9365 simplex iterations) in 13.18 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.551700000000e+04, best bound 1.551700000000e+04, gap 0.0%