Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:40:03 2012 Optimize a model with 1 rows, 39 columns and 39 nonzeros Model has 66 quadratic objective terms Presolve removed 0 rows and 3 columns Presolve time: 0.00s Presolved: 67 rows, 102 columns, 234 nonzeros Variable types: 0 continuous, 102 integer (101 binary) Found heuristic solution: objective 24.0000000 Root relaxation: objective 0.000000e+00, 77 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 27 24.00000 0.00000 100% - 0s H 0 0 21.0000000 0.00000 100% - 0s 0 0 0.00000 0 28 21.00000 0.00000 100% - 0s H 0 0 17.0000000 0.00000 100% - 0s H 0 0 15.0000000 0.00000 100% - 0s 0 0 0.00000 0 20 15.00000 0.00000 100% - 0s 0 0 0.00000 0 17 15.00000 0.00000 100% - 0s 0 0 0.00000 0 17 15.00000 0.00000 100% - 0s 0 0 0.00000 0 17 15.00000 0.00000 100% - 0s 0 2 0.00000 0 17 15.00000 0.00000 100% - 0s H 143 79 13.0000000 1.00000 92.3% 9.1 0s * 198 58 11 12.0000000 2.00000 83.3% 12.7 0s Cutting planes: Cover: 123 Explored 265 nodes (4167 simplex iterations) in 0.07 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.200000000000e+01, best bound 1.200000000000e+01, gap 0.0%