Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:14:55 2013

Optimize a model with 1983 rows, 68628 columns and 3468898 nonzeros
Presolve removed 32 rows and 289 columns (presolve time = 6s) ...
Presolve removed 36 rows and 373 columns (presolve time = 10s) ...
Presolve removed 36 rows and 373 columns
Presolve time: 12.68s
Presolved: 1947 rows, 68255 columns, 3448956 nonzeros
Variable types: 0 continuous, 68255 integer (68255 binary)
Found heuristic solution: objective 38873.000000

Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
    7837    2.3244845e+04   3.114407e+02   0.000000e+00      5s
   11287    2.3541890e+04   8.794040e+02   0.000000e+00     10s
   14185    2.3652188e+04   5.947501e+02   0.000000e+00     15s
   16393    2.3684463e+04   3.463209e+03   0.000000e+00     20s
   17822    2.3691000e+04   0.000000e+00   0.000000e+00     25s

Root relaxation: objective 2.369100e+04, 17822 iterations, 24.60 seconds

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

*    0     0               0    23691.000000 23691.0000   0.0%     -   37s

Explored 0 nodes (17822 simplex iterations) in 37.85 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.369100000000e+04, best bound 2.369100000000e+04, gap 0.0000%