Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:17:50 2012

Optimize a model with 3526 rows, 1722 columns and 12136 nonzeros
Presolve removed 697 rows and 0 columns
Presolve time: 0.07s
Presolved: 2829 rows, 1722 columns, 10537 nonzeros
Variable types: 0 continuous, 1722 integer (1722 binary)
Found heuristic solution: objective 24.0000000

Root relaxation: objective 3.000000e+00, 2494 iterations, 0.12 seconds

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

     0     0    3.00000    0   70   24.00000    3.00000  87.5%     -    0s
H    0     0                       4.0000000    3.00000  25.0%     -    0s
     0     0    3.00000    0  173    4.00000    3.00000  25.0%     -    0s
     0     0    3.00000    0   73    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   72    4.00000    3.00000  25.0%     -    2s
     0     0    3.00000    0   96    4.00000    3.00000  25.0%     -    2s
     0     0    3.00000    0   60    4.00000    3.00000  25.0%     -    2s
     0     0    3.00000    0   74    4.00000    3.00000  25.0%     -    3s
     0     0    3.00000    0  126    4.00000    3.00000  25.0%     -    3s
     0     0    3.00000    0  119    4.00000    3.00000  25.0%     -    3s
     0     2    3.00000    0  119    4.00000    3.00000  25.0%     -    4s
     4     4    3.00000    1   32    4.00000    3.00000  25.0%   361    5s
    14    11 infeasible   11         4.00000    3.00000  25.0%  3470   10s

Cutting planes:
  Gomory: 3
  Zero half: 2

Explored 24 nodes (97015 simplex iterations) in 12.34 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%