Gurobi 5.0.1 (linux64) logging started Sat Nov 17 02:42:29 2012

Optimize a model with 54779 rows, 48620 columns and 211858 nonzeros
Presolve removed 678 rows and 3522 columns
Presolve time: 1.35s
Presolved: 54101 rows, 45098 columns, 206306 nonzeros
Variable types: 0 continuous, 45098 integer (45098 binary)
Found heuristic solution: objective 220.0000000

Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   33728    3.0000829e+00   2.480952e+01   0.000000e+00      5s
   38607    3.0000867e+00   1.797983e+01   0.000000e+00     10s
   42657    3.0000902e+00   4.356529e+00   0.000000e+00     15s
   47168    3.0000000e+00   0.000000e+00   0.000000e+00     20s

Root relaxation: objective 3.000000e+00, 47168 iterations, 19.86 seconds
Total elapsed time = 57.71s

    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%     -   60s

Explored 0 nodes (110691 simplex iterations) in 60.23 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%