Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:09:59 2012

Optimize a model with 87 rows, 82 columns and 297 nonzeros
Presolve removed 0 rows and 3 columns
Presolve time: 0.00s
Presolved: 87 rows, 79 columns, 294 nonzeros
Variable types: 0 continuous, 79 integer (78 binary)
Found heuristic solution: objective 15.0000000

Root relaxation: objective 0.000000e+00, 50 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   31   15.00000    0.00000   100%     -    0s
H    0     0                      13.0000000    0.00000   100%     -    0s
H    0     0                      12.0000000    0.00000   100%     -    0s
     0     0    0.26087    0   33   12.00000    0.26087  97.8%     -    0s
H    0     0                       7.0000000    0.26087  96.3%     -    0s
     0     0    0.89530    0   37    7.00000    0.89530  87.2%     -    0s
H    0     0                       6.0000000    0.89530  85.1%     -    0s
     0     2    1.00000    0   37    6.00000    1.00000  83.3%     -    0s
*    5     5               4       4.0000000    2.30334  42.4%  22.4    0s

Cutting planes:
  Gomory: 3
  Mod-K: 1

Explored 11 nodes (327 simplex iterations) in 0.03 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%