Gurobi 5.0.1 (linux64) logging started Fri Nov 16 06:15:47 2012

Optimize a model with 8874 rows, 3422 columns and 29812 nonzeros
Presolve time: 0.08s
Presolved: 8874 rows, 3422 columns, 30126 nonzeros
Variable types: 0 continuous, 3422 integer (3422 binary)
Found heuristic solution: objective 38.0000000

Root relaxation: objective 2.000000e+00, 3089 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  116   38.00000    2.00000  94.7%     -    0s
H    0     0                      12.0000000    2.00000  83.3%     -    0s
H    0     0                       5.0000000    2.00000  60.0%     -    0s
     0     0    2.00000    0  116    5.00000    2.00000  60.0%     -    1s
     0     0    2.00000    0  116    5.00000    2.00000  60.0%     -    4s
H    0     0                       4.0000000    2.00000  50.0%     -    4s
     0     0    2.00000    0  116    4.00000    2.00000  50.0%     -    7s
     0     0    2.00000    0  116    4.00000    2.00000  50.0%     -    9s
     0     0    2.00000    0  116    4.00000    2.00000  50.0%     -   12s
     0     0    2.00000    0  116    4.00000    2.00000  50.0%     -   15s
     0     2    2.00000    0  116    4.00000    2.00000  50.0%     -   28s
     1     3    3.00000    1  552    4.00000    2.00000  50.0% 19633   33s
     2     4    3.00000    1  403    4.00000    3.00000  25.0% 14380   36s
    24     4    3.00000    3  261    4.00000    3.00000  25.0%  1987   40s
    57     1     cutoff    7         4.00000    3.00000  25.0%  1299   45s

Cutting planes:
  Clique: 115

Explored 59 nodes (132445 simplex iterations) in 45.01 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%