Gurobi 5.0.1 (linux64) logging started Fri Nov 16 06:29:03 2012

Optimize a model with 9801 rows, 3422 columns and 32536 nonzeros
Presolve removed 2 rows and 2 columns
Presolve time: 0.22s
Presolved: 9857 rows, 3420 columns, 35562 nonzeros
Variable types: 0 continuous, 3420 integer (3420 binary)
Found heuristic solution: objective 58.0000000

Root relaxation: objective 2.000000e+00, 2620 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   58.00000    2.00000  96.6%     -    0s
H    0     0                       4.0000000    2.00000  50.0%     -    0s
     0     0    2.66667    0  169    4.00000    2.66667  33.3%     -    1s
     0     0    2.67066    0 2912    4.00000    2.67066  33.2%     -    1s
     0     0    2.67066    0 2906    4.00000    2.67066  33.2%     -    2s
     0     0    2.67066    0 2932    4.00000    2.67066  33.2%     -    3s
     0     0    2.67066    0 2512    4.00000    2.67066  33.2%     -    4s
     0     0    2.67066    0 2539    4.00000    2.67066  33.2%     -    5s
     0     0    2.67066    0 2544    4.00000    2.67066  33.2%     -    6s
     0     0    2.67066    0 2544    4.00000    2.67066  33.2%     -    7s
     0     0    2.67066    0 2543    4.00000    2.67066  33.2%     -    9s
     0     0    2.67066    0 2485    4.00000    2.67066  33.2%     -    9s
     0     0    2.67066    0 2577    4.00000    2.67066  33.2%     -   10s
     0     0    2.67066    0 2577    4.00000    2.67066  33.2%     -   11s
     0     2    2.80000    0 2577    4.00000    2.80000  30.0%     -   14s
     8     0     cutoff    1         4.00000    4.00000   0.0%   925   15s

Cutting planes:
  Clique: 68
  Zero half: 4

Explored 9 nodes (43018 simplex iterations) in 15.24 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%