Gurobi 5.0.1 (linux64) logging started Sat Nov 17 04:07:22 2012

Optimize a model with 55999 rows, 50400 columns and 217278 nonzeros
Presolve removed 1346 rows and 2 columns
Presolve time: 1.54s
Presolved: 54877 rows, 50398 columns, 263606 nonzeros
Variable types: 0 continuous, 50398 integer (50398 binary)
Found heuristic solution: objective 224.0000000

Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   32669    3.0000824e+00   5.133333e+01   0.000000e+00      5s
   37606    3.0000878e+00   8.646879e+01   0.000000e+00     10s
   41550    3.0000923e+00   9.875266e+01   0.000000e+00     15s
   45494    3.0000964e+00   3.357018e+00   0.000000e+00     20s
   46301    3.0000000e+00   0.000000e+00   0.000000e+00     21s

Root relaxation: objective 3.000000e+00, 46301 iterations, 21.13 seconds

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

*    0     0               0       3.0000000    3.00000   0.0%     -   43s

Explored 0 nodes (86846 simplex iterations) in 43.99 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.000000000000e+00, best bound 3.000000000000e+00, gap 0.0%