Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:20:09 2012

Optimize a model with 3771 rows, 1722 columns and 12831 nonzeros
Presolve removed 1027 rows and 2 columns
Presolve time: 0.12s
Presolved: 2785 rows, 1720 columns, 11959 nonzeros
Variable types: 0 continuous, 1720 integer (1720 binary)
Found heuristic solution: objective 41.0000000

Root relaxation: objective 3.000000e+00, 2848 iterations, 0.26 seconds

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

     0     0    3.00000    0  392   41.00000    3.00000  92.7%     -    0s
H    0     0                      36.0000000    3.00000  91.7%     -    0s
H    0     0                      29.0000000    3.00000  89.7%     -    0s
H    0     0                      10.0000000    3.00000  70.0%     -    0s
     0     0    3.00000    0   95   10.00000    3.00000  70.0%     -    1s
H    0     0                       5.0000000    3.00000  40.0%     -    1s
     0     0    3.00000    0   54    5.00000    3.00000  40.0%     -    1s
H    0     0                       4.0000000    3.00000  25.0%     -    1s
     0     0    3.00000    0   80    4.00000    3.00000  25.0%     -    1s
     0     0    3.00000    0   69    4.00000    3.00000  25.0%     -    1s
     0     0    3.00000    0   68    4.00000    3.00000  25.0%     -    2s
     0     0 infeasible    0         4.00000    3.00001  25.0%     -    2s

Cutting planes:
  Zero half: 27

Explored 0 nodes (16880 simplex iterations) in 2.27 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%