Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:09:48 2012

Optimize a model with 81 rows, 77 columns and 277 nonzeros
Presolve removed 0 rows and 1 columns
Presolve time: 0.00s
Presolved: 81 rows, 76 columns, 276 nonzeros
Variable types: 0 continuous, 76 integer (75 binary)
Found heuristic solution: objective 14.0000000

Root relaxation: objective 0.000000e+00, 45 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   14.00000    0.00000   100%     -    0s
H    0     0                      10.0000000    0.00000   100%     -    0s
H    0     0                       8.0000000    0.00000   100%     -    0s
H    0     0                       5.0000000    0.00000   100%     -    0s
     0     0    0.37143    0   33    5.00000    0.37143  92.6%     -    0s
     0     0    0.81463    0   35    5.00000    0.81463  83.7%     -    0s
     0     0    0.81852    0   37    5.00000    0.81852  83.6%     -    0s
     0     0    0.81852    0   37    5.00000    0.81852  83.6%     -    0s
H    0     0                       4.0000000    0.81852  79.5%     -    0s
     0     2    0.82693    0   37    4.00000    0.82693  79.3%     -    0s

Cutting planes:
  Gomory: 3
  Mod-K: 1

Explored 12 nodes (277 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%