Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:09:18 2012

Optimize a model with 2278 rows, 1190 columns and 7888 nonzeros
Presolve removed 646 rows and 0 columns
Presolve time: 0.04s
Presolved: 1632 rows, 1190 columns, 6358 nonzeros
Variable types: 0 continuous, 1190 integer (1190 binary)
Found heuristic solution: objective 18.0000000

Root relaxation: objective 3.000000e+00, 1698 iterations, 0.07 seconds

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

     0     0    3.00000    0   66   18.00000    3.00000  83.3%     -    0s
H    0     0                       4.0000000    3.00000  25.0%     -    0s
     0     0    3.00000    0   94    4.00000    3.00000  25.0%     -    0s
     0     0    3.00000    0   92    4.00000    3.00000  25.0%     -    0s
     0     0    3.00000    0   93    4.00000    3.00000  25.0%     -    0s
     0     0    3.00000    0   72    4.00000    3.00000  25.0%     -    1s
     0     0    3.00000    0   84    4.00000    3.00000  25.0%     -    1s
     0     0    3.00000    0   84    4.00000    3.00000  25.0%     -    1s
     0     2    3.00000    0   84    4.00000    3.00000  25.0%     -    1s

Cutting planes:
  Gomory: 5
  Clique: 2
  Zero half: 2

Explored 12 nodes (38011 simplex iterations) in 3.59 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%