Gurobi 5.0.1 (linux64) logging started Fri Nov 16 04:59:00 2012

Optimize a model with 6836 rows, 2862 columns and 23106 nonzeros
Presolve removed 1221 rows and 2 columns
Presolve time: 0.18s
Presolved: 5668 rows, 2860 columns, 22841 nonzeros
Variable types: 0 continuous, 2860 integer (2860 binary)
Found heuristic solution: objective 52.0000000

Root relaxation: objective 3.000000e+00, 4641 iterations, 0.70 seconds

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

     0     0    3.00000    0   83   52.00000    3.00000  94.2%     -    2s
H    0     0                      30.0000000    3.00000  90.0%     -    2s
H    0     0                       7.0000000    3.00000  57.1%     -    2s
H    0     0                       5.0000000    3.00000  40.0%     -    3s
     0     0    3.00000    0  126    5.00000    3.00000  40.0%     -    3s
H    0     0                       4.0000000    3.00000  25.0%     -    3s
     0     0    3.00000    0   95    4.00000    3.00000  25.0%     -    5s
     0     0    3.00000    0   94    4.00000    3.00000  25.0%     -    8s
     0     0    3.00000    0   92    4.00000    3.00000  25.0%     -   10s
     0     0    3.00000    0  100    4.00000    3.00000  25.0%     -   12s
     0     0    3.00000    0  116    4.00000    3.00000  25.0%     -   14s
     0     0    3.00000    0  164    4.00000    3.00000  25.0%     -   16s
     0     0    3.00000    0  114    4.00000    3.00000  25.0%     -   20s
     0     0    3.00000    0  100    4.00000    3.00000  25.0%     -   22s
     0     0    3.00000    0   95    4.00000    3.00000  25.0%     -   24s
     0     0    3.00000    0  113    4.00000    3.00000  25.0%     -   28s
     0     0    3.00000    0  113    4.00000    3.00000  25.0%     -   29s
     0     2    3.00000    0  113    4.00000    3.00000  25.0%     -   32s
     4     4    3.00000    1   83    4.00000    3.00000  25.0%   884   39s
     5     5    3.00000    1  108    4.00000    3.00000  25.0%   707   42s
     7     6    3.00000    1  117    4.00000    3.00000  25.0%   505   47s
     8     7    3.00000    1  113    4.00000    3.00000  25.0%   442   52s
     9     8    3.00000    1  121    4.00000    3.00000  25.0%   393   59s
    10     8    3.00000    1  107    4.00000    3.00000  25.0%   354   62s
    13    12    3.00000   16  109    4.00000    3.00000  25.0%  8051   67s
    17    11    3.00000   18   96    4.00000    3.00000  25.0%  6232   71s
    21    10    3.00000   20 1159    4.00000    3.00000  25.0%  5228   92s
    33     4 infeasible   18         4.00000    3.00000  25.0%  3682   95s

Cutting planes:
  Clique: 2
  Zero half: 16

Explored 38 nodes (271514 simplex iterations) in 96.42 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%