Gurobi 5.0.1 (linux64) logging started Sat Nov 17 03:38:29 2012

Optimize a model with 59540 rows, 49952 columns and 227458 nonzeros
Presolve removed 21 rows and 4239 columns
Presolve time: 1.47s
Presolved: 59519 rows, 45713 columns, 222687 nonzeros
Variable types: 0 continuous, 45713 integer (45713 binary)
Found heuristic solution: objective 223.0000000

Root relaxation: objective 2.000000e+00, 31798 iterations, 2.93 seconds
Total elapsed time = 8.46s

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

     0     0    2.00000    0  372  223.00000    2.00000  99.1%     -    9s
H    0     0                     199.0000000    2.00000  99.0%     -    9s
H    0     0                       4.0000000    2.00000  50.0%     -   10s
     0     0    2.20000    0 5887    4.00000    2.20000  45.0%     -   44s
     0     0    2.40000    0 3821    4.00000    2.40000  40.0%     -   98s
H    0     0                       3.0000000    2.40000  20.0%     -  100s

Cutting planes:
  Zero half: 16

Explored 0 nodes (166443 simplex iterations) in 100.78 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%