Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:09:22 2012

Optimize a model with 2176 rows, 1190 columns and 7582 nonzeros
Presolve removed 442 rows and 0 columns
Presolve time: 0.04s
Presolved: 1734 rows, 1190 columns, 6596 nonzeros
Variable types: 0 continuous, 1190 integer (1190 binary)
Found heuristic solution: objective 20.0000000

Root relaxation: objective 3.000000e+00, 1668 iterations, 0.06 seconds

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

     0     0    3.00000    0   55   20.00000    3.00000  85.0%     -    0s
H    0     0                       5.0000000    3.00000  40.0%     -    0s
H    0     0                       4.0000000    3.00000  25.0%     -    0s
     0     0    3.00000    0   53    4.00000    3.00000  25.0%     -    0s
     0     0    3.00000    0   73    4.00000    3.00000  25.0%     -    0s
     0     0    3.00000    0   52    4.00000    3.00000  25.0%     -    0s
     0     0    3.00000    0   51    4.00000    3.00000  25.0%     -    0s
     0     0    3.00000    0   61    4.00000    3.00000  25.0%     -    0s
     0     0    3.00000    0   67    4.00000    3.00000  25.0%     -    1s
     0     0    3.00000    0   71    4.00000    3.00000  25.0%     -    1s
     0     0    3.00000    0   65    4.00000    3.00000  25.0%     -    1s
     0     2    3.00000    0   65    4.00000    3.00000  25.0%     -    1s
    16    12    3.00000   15   40    4.00000    3.00000  25.0%  2142    5s

Cutting planes:
  Gomory: 2
  Zero half: 4

Explored 19 nodes (55757 simplex iterations) in 5.10 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%