Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:19:09 2012

Optimize a model with 3771 rows, 1722 columns and 12831 nonzeros
Presolve removed 1028 rows and 43 columns
Presolve time: 0.11s
Presolved: 2743 rows, 1679 columns, 10237 nonzeros
Variable types: 0 continuous, 1679 integer (1679 binary)
Found heuristic solution: objective 41.0000000

Root relaxation: objective 3.000000e+00, 2902 iterations, 0.25 seconds

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

     0     0    3.00000    0   78   41.00000    3.00000  92.7%     -    1s
H    0     0                       4.0000000    3.00000  25.0%     -    1s
     0     0    3.00000    0   82    4.00000    3.00000  25.0%     -    1s
     0     0    3.00000    0   44    4.00000    3.00000  25.0%     -    2s
     0     0 infeasible    0         4.00000    3.00001  25.0%     -    2s

Cutting planes:
  Zero half: 5

Explored 0 nodes (22351 simplex iterations) in 2.33 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%