Gurobi 5.0.1 (linux64) logging started Fri Nov 16 06:17:28 2012

Optimize a model with 8874 rows, 3422 columns and 29812 nonzeros
Presolve removed 1 rows and 58 columns
Presolve time: 0.08s
Presolved: 8873 rows, 3364 columns, 30084 nonzeros
Variable types: 0 continuous, 3364 integer (3364 binary)
Found heuristic solution: objective 37.0000000

Root relaxation: objective 2.000000e+00, 5970 iterations, 0.73 seconds

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

     0     0    2.00000    0  114   37.00000    2.00000  94.6%     -    0s
H    0     0                       9.0000000    2.00000  77.8%     -    0s
H    0     0                       4.0000000    2.00000  50.0%     -    0s
     0     0    2.00000    0  114    4.00000    2.00000  50.0%     -    1s
     0     0    2.00000    0  114    4.00000    2.00000  50.0%     -    1s
     0     0    2.00000    0  114    4.00000    2.00000  50.0%     -    1s
     0     0    2.00000    0  114    4.00000    2.00000  50.0%     -    1s
     0     0    2.00000    0  114    4.00000    2.00000  50.0%     -    1s
     0     0    2.00000    0  114    4.00000    2.00000  50.0%     -    1s
     0     2    2.00000    0  114    4.00000    2.00000  50.0%     -    4s
     1     3    3.00000    1  666    4.00000    2.00039  50.0%  9579    7s
     3     5    3.00000    2  564    4.00000    3.00000  25.0%  5770   10s
    26     4    3.00000    4  164    4.00000    3.00000  25.0%  1529   15s

Cutting planes:
  Clique: 30

Explored 51 nodes (65744 simplex iterations) in 18.58 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%