Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:38:40 2012 Optimize a model with 1 rows, 31 columns and 31 nonzeros Model has 46 quadratic objective terms Presolve removed 0 rows and 1 columns Presolve time: 0.00s Presolved: 47 rows, 76 columns, 168 nonzeros Variable types: 0 continuous, 76 integer (75 binary) Found heuristic solution: objective 17.0000000 Root relaxation: objective 0.000000e+00, 58 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 17 17.00000 0.00000 100% - 0s H 0 0 15.0000000 0.00000 100% - 0s 0 0 0.00000 0 15 15.00000 0.00000 100% - 0s H 0 0 13.0000000 0.00000 100% - 0s H 0 0 11.0000000 0.00000 100% - 0s 0 0 0.00000 0 38 11.00000 0.00000 100% - 0s 0 0 0.00000 0 15 11.00000 0.00000 100% - 0s H 0 0 10.0000000 0.00000 100% - 0s 0 2 0.00000 0 10 10.00000 0.00000 100% - 0s H 51 31 9.0000000 0.00000 100% 3.2 0s H 134 48 8.0000000 1.00000 87.5% 7.1 0s Cutting planes: Gomory: 2 Cover: 88 Explored 197 nodes (1822 simplex iterations) in 0.03 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.000000000000e+00, best bound 8.000000000000e+00, gap 0.0%