Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:23:51 2012

Optimize a model with 3737 rows, 1806 columns and 12808 nonzeros
Presolve removed 716 rows and 2 columns
Presolve time: 0.10s
Presolved: 3063 rows, 1804 columns, 12748 nonzeros
Variable types: 0 continuous, 1804 integer (1804 binary)
Found heuristic solution: objective 42.0000000

Root relaxation: objective 3.000000e+00, 2798 iterations, 0.19 seconds

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

     0     0    3.00000    0   87   42.00000    3.00000  92.9%     -    1s
H    0     0                      36.0000000    3.00000  91.7%     -    1s
H    0     0                      30.0000000    3.00000  90.0%     -    1s
H    0     0                       4.0000000    3.00000  25.0%     -    1s
     0     0    3.00000    0   78    4.00000    3.00000  25.0%     -    1s
     0     0    3.00000    0   86    4.00000    3.00000  25.0%     -    1s
     0     0    3.00000    0   70    4.00000    3.00000  25.0%     -    2s
     0     0    3.00000    0   93    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   75    4.00000    3.00000  25.0%     -    3s
     0     0    3.00000    0   80    4.00000    3.00000  25.0%     -    3s
     0     0    3.00000    0  473    4.00000    3.00000  25.0%     -    4s
     0     0    3.00000    0  196    4.00000    3.00000  25.0%     -    5s
     0     2    3.00000    0  196    4.00000    3.00000  25.0%     -    6s

Cutting planes:
  Gomory: 7
  Zero half: 21

Explored 5 nodes (62999 simplex iterations) in 9.37 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%