Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:11:50 2012 Optimize a model with 1 rows, 52 columns and 52 nonzeros Model has 81 quadratic objective terms Presolve removed 0 rows and 1 columns Presolve time: 0.00s Presolved: 82 rows, 132 columns, 294 nonzeros Variable types: 0 continuous, 132 integer (131 binary) Found heuristic solution: objective 31.0000000 Root relaxation: objective 0.000000e+00, 108 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 26 31.00000 0.00000 100% - 0s H 0 0 23.0000000 0.00000 100% - 0s 0 0 0.00000 0 33 23.00000 0.00000 100% - 0s H 0 0 20.0000000 0.00000 100% - 0s 0 0 0.00000 0 29 20.00000 0.00000 100% - 0s H 0 0 17.0000000 0.00000 100% - 0s 0 0 0.00000 0 24 17.00000 0.00000 100% - 0s H 0 0 16.0000000 0.00000 100% - 0s 0 0 0.00000 0 22 16.00000 0.00000 100% - 0s 0 0 0.00000 0 17 16.00000 0.00000 100% - 0s H 0 0 14.0000000 0.00000 100% - 0s 0 0 0.00000 0 23 14.00000 0.00000 100% - 0s 0 0 0.00000 0 24 14.00000 0.00000 100% - 0s 0 0 0.00000 0 24 14.00000 0.00000 100% - 0s H 0 0 13.0000000 0.00000 100% - 0s 0 2 0.00000 0 20 13.00000 0.00000 100% - 0s H 242 108 11.0000000 1.00000 90.9% 9.9 0s Cutting planes: Gomory: 1 Cover: 155 MIR: 6 Zero half: 2 Explored 444 nodes (8060 simplex iterations) in 0.15 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.100000000000e+01, best bound 1.100000000000e+01, gap 0.0%