Gurobi 5.0.1 (linux64) logging started Sat Nov 17 02:07:19 2012

Optimize a model with 53815 rows, 47306 columns and 207667 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 1.27s
Presolved: 54030 rows, 47304 columns, 254260 nonzeros
Variable types: 0 continuous, 47304 integer (47304 binary)
Found heuristic solution: objective 217.0000000

Root relaxation: objective 2.000000e+00, 30039 iterations, 3.12 seconds
Total elapsed time = 7.86s

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

     0     0    2.00000    0  362  217.00000    2.00000  99.1%     -    9s
H    0     0                       4.0000000    2.00000  50.0%     -    9s
H    0     0                       3.0000000    2.00000  33.3%     -    9s
     0     0 infeasible    0         3.00000    2.00000  33.3%     -    9s

Cutting planes:
  Gomory: 1
  Zero half: 44

Explored 0 nodes (94362 simplex iterations) in 9.47 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%