Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:10:17 2012

Optimize a model with 89 rows, 86 columns and 306 nonzeros
Presolve removed 0 rows and 4 columns
Presolve time: 0.00s
Presolved: 89 rows, 82 columns, 302 nonzeros
Variable types: 0 continuous, 82 integer (81 binary)
Found heuristic solution: objective 15.0000000

Root relaxation: objective 0.000000e+00, 47 iterations, 0.00 seconds

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

     0     0    0.00000    0   35   15.00000    0.00000   100%     -    0s
H    0     0                      13.0000000    0.00000   100%     -    0s
H    0     0                      12.0000000    0.00000   100%     -    0s
H    0     0                      11.0000000    0.00000   100%     -    0s
     0     0    0.38009    0   38   11.00000    0.38009  96.5%     -    0s
H    0     0                      10.0000000    0.38009  96.2%     -    0s
     0     0    0.88164    0   41   10.00000    0.88164  91.2%     -    0s
     0     0    0.88164    0   43   10.00000    0.88164  91.2%     -    0s
     0     0    0.88164    0   43   10.00000    0.88164  91.2%     -    0s
H    0     0                       9.0000000    0.88164  90.2%     -    0s
H    0     0                       7.0000000    0.88164  87.4%     -    0s
     0     2    0.89397    0   43    7.00000    0.89397  87.2%     -    0s
*   17     9              13       5.0000000    1.74836  65.0%  11.8    0s
*   27     3               4       4.0000000    1.96330  50.9%  10.5    0s

Cutting planes:
  Gomory: 3
  Mod-K: 6

Explored 31 nodes (554 simplex iterations) in 0.02 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%