Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:11:46 2012

Optimize a model with 3144 rows, 1406 columns and 10654 nonzeros
Presolve removed 520 rows and 2 columns
Presolve time: 0.10s
Presolved: 2624 rows, 1404 columns, 9402 nonzeros
Variable types: 0 continuous, 1404 integer (1404 binary)
Found heuristic solution: objective 37.0000000

Root relaxation: objective 3.000000e+00, 1928 iterations, 0.10 seconds

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

     0     0    3.00000    0   24   37.00000    3.00000  91.9%     -    0s
H    0     0                      34.0000000    3.00000  91.2%     -    0s
H    0     0                       4.0000000    3.00000  25.0%     -    0s
     0     0    3.00000    0  559    4.00000    3.00000  25.0%     -    0s
     0     0    3.00000    0   45    4.00000    3.00000  25.0%     -    1s
     0     0    3.00000    0   46    4.00000    3.00000  25.0%     -    1s
     0     0    3.00000    0   73    4.00000    3.00000  25.0%     -    1s
     0     0    3.00000    0   69    4.00000    3.00000  25.0%     -    2s
     0     0    3.00000    0   80    4.00000    3.00000  25.0%     -    2s
     0     0    3.00000    0   80    4.00000    3.00000  25.0%     -    2s
     0     2    3.00000    0   50    4.00000    3.00000  25.0%     -    3s
     4     4    3.00000    1   42    4.00000    3.00000  25.0%   594    5s
    10     8    3.00000    1  676    4.00000    3.00000  25.0%   238   11s

Cutting planes:
  Gomory: 1
  Zero half: 5

Explored 18 nodes (80254 simplex iterations) in 13.09 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%