Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:15:00 2012

Optimize a model with 3704 rows, 1560 columns and 12478 nonzeros
Presolve removed 821 rows and 2 columns
Presolve time: 0.11s
Presolved: 2922 rows, 1558 columns, 11862 nonzeros
Variable types: 0 continuous, 1558 integer (1558 binary)
Found heuristic solution: objective 39.0000000

Root relaxation: objective 3.000000e+00, 2517 iterations, 0.20 seconds

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

     0     0    3.00000    0   80   39.00000    3.00000  92.3%     -    1s
H    0     0                       6.0000000    3.00000  50.0%     -    1s
H    0     0                       4.0000000    3.00000  25.0%     -    1s
     0     0    3.00000    0   94    4.00000    3.00000  25.0%     -    1s
     0     0    3.00000    0   75    4.00000    3.00000  25.0%     -    2s
     0     0    3.00000    0   54    4.00000    3.00000  25.0%     -    2s
     0     0    3.00000    0   54    4.00000    3.00000  25.0%     -    3s
     0     0    3.00000    0   78    4.00000    3.00000  25.0%     -    4s
     0     0    3.00000    0   79    4.00000    3.00000  25.0%     -    4s
     0     0    3.00000    0   79    4.00000    3.00000  25.0%     -    5s
     0     0    3.00000    0   79    4.00000    3.00000  25.0%     -    6s
     0     2    3.00000    0   79    4.00000    3.00000  25.0%     -    7s
     5     5    3.00000    1   74    4.00000    3.00000  25.0%   382   10s

Cutting planes:
  Gomory: 48
  Clique: 2
  Zero half: 124

Explored 8 nodes (88418 simplex iterations) in 13.58 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%