Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:12:41 2012

Optimize a model with 1 rows, 56 columns and 56 nonzeros
Model has 81 quadratic objective terms
Presolve time: 0.00s
Presolved: 82 rows, 137 columns, 299 nonzeros
Variable types: 0 continuous, 137 integer (137 binary)
Found heuristic solution: objective 31.0000000

Root relaxation: objective 0.000000e+00, 111 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   20   31.00000    0.00000   100%     -    0s
H    0     0                      20.0000000    0.00000   100%     -    0s
     0     0    0.00000    0   35   20.00000    0.00000   100%     -    0s
H    0     0                      16.0000000    0.00000   100%     -    0s
     0     0    0.00000    0   15   16.00000    0.00000   100%     -    0s
H    0     0                      14.0000000    0.00000   100%     -    0s
H    0     0                      13.0000000    0.00000   100%     -    0s
     0     0    0.00000    0   17   13.00000    0.00000   100%     -    0s
     0     0    0.00000    0   17   13.00000    0.00000   100%     -    0s
     0     0    0.00000    0   17   13.00000    0.00000   100%     -    0s
     0     2    0.00000    0   17   13.00000    0.00000   100%     -    0s
H   81    57                      12.0000000    0.00000   100%   3.3    0s
H  271   118                      11.0000000    1.00000  90.9%   8.1    0s
H  287   105                      10.0000000    1.16667  88.3%   8.9    0s

Cutting planes:
  Gomory: 1
  Cover: 153
  MIR: 4
  Zero half: 1

Explored 434 nodes (7745 simplex iterations) in 0.13 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.000000000000e+01, best bound 1.000000000000e+01, gap 0.0%