Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:10:22 2012

Optimize a model with 2736 rows, 1332 columns and 9396 nonzeros
Presolve removed 757 rows and 36 columns
Presolve time: 0.05s
Presolved: 1979 rows, 1296 columns, 7560 nonzeros
Variable types: 0 continuous, 1296 integer (1296 binary)
Found heuristic solution: objective 24.0000000

Root relaxation: objective 3.000000e+00, 2439 iterations, 0.13 seconds

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

     0     0    3.00000    0   38   24.00000    3.00000  87.5%     -    0s
H    0     0                       4.0000000    3.00000  25.0%     -    0s
     0     0    3.00000    0  154    4.00000    3.00000  25.0%     -    0s
     0     0    3.00000    0   68    4.00000    3.00000  25.0%     -    0s
     0     0    3.00000    0   89    4.00000    3.00000  25.0%     -    1s
     0     0    3.00000    0   92    4.00000    3.00000  25.0%     -    1s
     0     0    3.00000    0   62    4.00000    3.00000  25.0%     -    1s
     0     0    3.00000    0   60    4.00000    3.00000  25.0%     -    1s
     0     0    3.00000    0   59    4.00000    3.00000  25.0%     -    2s
     0     0    3.00000    0   63    4.00000    3.00000  25.0%     -    2s
     0     0    3.00000    0   94    4.00000    3.00000  25.0%     -    2s
     0     0    3.00000    0   94    4.00000    3.00000  25.0%     -    2s
     0     2    3.00000    0   44    4.00000    3.00000  25.0%     -    3s
     7     6    3.00000    1   93    4.00000    3.00000  25.0%   309    5s

Cutting planes:
  Gomory: 3
  Clique: 3
  Zero half: 3

Explored 16 nodes (62627 simplex iterations) in 7.33 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%