Gurobi 5.0.1 (linux64) logging started Mon Feb  4 17:52:20 2013

Optimize a model with 1861 rows, 60660 columns and 3033887 nonzeros
Presolve removed 40 rows and 209 columns (presolve time = 5s) ...
Presolve removed 45 rows and 455 columns (presolve time = 10s) ...
Presolve removed 45 rows and 455 columns
Presolve time: 11.03s
Presolved: 1816 rows, 60205 columns, 3006457 nonzeros
Variable types: 0 continuous, 60205 integer (60205 binary)
Found heuristic solution: objective 34842.000000

Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
    8382    2.0985355e+04   3.052006e+02   0.000000e+00      5s
   12078    2.1184796e+04   5.736044e+02   0.000000e+00     10s
   14850    2.1237236e+04   2.460467e+02   0.000000e+00     15s
   16792    2.1245000e+04   0.000000e+00   0.000000e+00     20s

Root relaxation: objective 2.124500e+04, 16792 iterations, 19.85 seconds

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

*    0     0               0    21245.000000 21245.0000   0.0%     -   31s

Explored 0 nodes (16792 simplex iterations) in 31.37 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.124500000000e+04, best bound 2.124500000000e+04, gap 0.0%