Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:08:26 2012

Optimize a model with 1769 rows, 930 columns and 6088 nonzeros
Presolve removed 512 rows and 2 columns
Presolve time: 0.07s
Presolved: 1257 rows, 928 columns, 4864 nonzeros
Variable types: 0 continuous, 928 integer (928 binary)
Found heuristic solution: objective 30.0000000

Root relaxation: objective 3.000000e+00, 978 iterations, 0.03 seconds

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

     0     0    3.00000    0   50   30.00000    3.00000  90.0%     -    0s
H    0     0                      24.0000000    3.00000  87.5%     -    0s
H    0     0                       5.0000000    3.00000  40.0%     -    0s
     0     0    3.00000    0  116    5.00000    3.00000  40.0%     -    0s
     0     0    3.00000    0   54    5.00000    3.00000  40.0%     -    0s
H    0     0                       4.0000000    3.00000  25.0%     -    0s
     0     0    3.00000    0   61    4.00000    3.00000  25.0%     -    0s
     0     0    3.00000    0   57    4.00000    3.00000  25.0%     -    0s
     0     0    3.00000    0   28    4.00000    3.00000  25.0%     -    0s
     0     0    3.00000    0   69    4.00000    3.00000  25.0%     -    0s
     0     0    3.00000    0   58    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   48    4.00000    3.00000  25.0%     -    1s
     0     2    3.00000    0   48    4.00000    3.00000  25.0%     -    1s
    14    12    3.00000   10  549    4.00000    3.00000  25.0%  1746    5s

Cutting planes:
  Gomory: 7
  Zero half: 15

Explored 21 nodes (46119 simplex iterations) in 5.67 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%