Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:43:19 2012 Optimize a model with 1 rows, 44 columns and 44 nonzeros Model has 79 quadratic objective terms Presolve time: 0.00s Presolved: 80 rows, 123 columns, 281 nonzeros Variable types: 0 continuous, 123 integer (123 binary) Found heuristic solution: objective 32.0000000 Root relaxation: objective 0.000000e+00, 106 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 23 32.00000 0.00000 100% - 0s H 0 0 23.0000000 0.00000 100% - 0s 0 0 0.00000 0 40 23.00000 0.00000 100% - 0s H 0 0 22.0000000 0.00000 100% - 0s 0 0 0.00000 0 41 22.00000 0.00000 100% - 0s 0 0 0.00000 0 28 22.00000 0.00000 100% - 0s H 0 0 20.0000000 0.00000 100% - 0s 0 2 0.00000 0 28 20.00000 0.00000 100% - 0s H 144 86 17.0000000 0.00000 100% 6.7 0s H 247 106 16.0000000 2.00000 87.5% 9.0 0s * 250 97 15 15.0000000 2.00000 86.7% 9.0 0s Cutting planes: Cover: 152 MIR: 3 Zero half: 3 Explored 450 nodes (6412 simplex iterations) in 0.12 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.500000000000e+01, best bound 1.500000000000e+01, gap 0.0%