Gurobi 5.0.1 (linux64) logging started Fri Nov 16 08:08:54 2012

Optimize a model with 11906 rows, 4032 columns and 39436 nonzeros
Presolve removed 3 rows and 65 columns
Presolve time: 0.33s
Presolved: 11903 rows, 3967 columns, 38995 nonzeros
Variable types: 0 continuous, 3967 integer (3967 binary)
Found heuristic solution: objective 62.0000000

Root relaxation: objective 2.000000e+00, 3122 iterations, 0.09 seconds

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

     0     0    2.00000    0  124   62.00000    2.00000  96.8%     -    0s
H    0     0                      59.0000000    2.00000  96.6%     -    0s
H    0     0                       5.0000000    2.00000  60.0%     -    0s
     0     0    2.66667    0  180    5.00000    2.66667  46.7%     -    2s
     0     0    2.67033    0 3459    5.00000    2.67033  46.6%     -    3s
     0     0    2.67033    0 3481    5.00000    2.67033  46.6%     -    4s
     0     0    2.67033    0 3279    5.00000    2.67033  46.6%     -   11s
H    0     0                       4.0000000    2.67033  33.2%     -   11s
     0     0    2.67033    0 3211    4.00000    2.67033  33.2%     -   17s
     0     0    2.67033    0 3146    4.00000    2.67033  33.2%     -   25s
     0     0    3.00000    0  247    4.00000    3.00000  25.0%     -   27s
     0     0    3.00000    0  148    4.00000    3.00000  25.0%     -   28s
     0     1    3.00000    0   76    4.00000    3.00000  25.0%     -   28s

Cutting planes:
  Gomory: 2
  Zero half: 5

Explored 1 nodes (75549 simplex iterations) in 28.18 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%