Gurobi 5.0.1 (linux64) logging started Mon Feb  4 16:56:01 2013

Optimize a model with 1862 rows, 49890 columns and 3020615 nonzeros
Presolve removed 54 rows and 345 columns (presolve time = 5s) ...
Presolve removed 76 rows and 794 columns
Presolve time: 9.88s
Presolved: 1786 rows, 49096 columns, 2971032 nonzeros
Variable types: 0 continuous, 49096 integer (49096 binary)
Found heuristic solution: objective 25805.000000

Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
    7547    2.0160674e+04   5.514898e+02   0.000000e+00      5s
   11057    2.0279630e+04   4.262867e+02   0.000000e+00     10s
   13458    2.0310000e+04   0.000000e+00   0.000000e+00     14s

Root relaxation: objective 2.031000e+04, 13458 iterations, 14.48 seconds

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

*    0     0               0    20310.000000 20310.0000   0.0%     -   24s

Explored 0 nodes (13458 simplex iterations) in 24.83 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.031000000000e+04, best bound 2.031000000000e+04, gap 0.0%