Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:12:55 2012 Optimize a model with 1 rows, 57 columns and 57 nonzeros Model has 86 quadratic objective terms Presolve removed 0 rows and 2 columns Presolve time: 0.00s Presolved: 87 rows, 141 columns, 313 nonzeros Variable types: 0 continuous, 141 integer (140 binary) Found heuristic solution: objective 38.0000000 Found heuristic solution: objective 28.0000000 Root relaxation: objective 0.000000e+00, 104 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 34 28.00000 0.00000 100% - 0s H 0 0 23.0000000 0.00000 100% - 0s 0 0 0.00000 0 28 23.00000 0.00000 100% - 0s 0 0 0.00000 0 30 23.00000 0.00000 100% - 0s 0 0 0.00000 0 20 23.00000 0.00000 100% - 0s H 0 0 20.0000000 0.00000 100% - 0s 0 0 0.00000 0 18 20.00000 0.00000 100% - 0s H 0 0 16.0000000 0.00000 100% - 0s 0 0 0.00000 0 21 16.00000 0.00000 100% - 0s 0 0 0.00000 0 24 16.00000 0.00000 100% - 0s 0 0 0.00000 0 18 16.00000 0.00000 100% - 0s 0 2 0.00000 0 18 16.00000 0.00000 100% - 0s H 132 81 13.0000000 0.00000 100% 5.0 0s H 188 85 12.0000000 0.00000 100% 6.1 0s H 245 93 11.0000000 1.00000 90.9% 8.3 0s * 272 54 5 9.0000000 2.00000 77.8% 8.9 0s Cutting planes: Cover: 158 Explored 334 nodes (5577 simplex iterations) in 0.11 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.000000000000e+00, best bound 9.000000000000e+00, gap 0.0%