Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:11:37 2012 Optimize a model with 1 rows, 51 columns and 51 nonzeros Model has 65 quadratic objective terms Presolve removed 0 rows and 4 columns Presolve time: 0.00s Presolved: 66 rows, 112 columns, 242 nonzeros Variable types: 0 continuous, 112 integer (111 binary) Found heuristic solution: objective 25.0000000 Found heuristic solution: objective 16.0000000 Root relaxation: objective 0.000000e+00, 88 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 24 16.00000 0.00000 100% - 0s 0 0 0.00000 0 21 16.00000 0.00000 100% - 0s H 0 0 11.0000000 0.00000 100% - 0s 0 0 0.00000 0 32 11.00000 0.00000 100% - 0s 0 0 0.00000 0 23 11.00000 0.00000 100% - 0s 0 2 0.00000 0 23 11.00000 0.00000 100% - 0s H 166 80 10.0000000 0.00000 100% 5.1 0s * 251 78 8 9.0000000 1.00000 88.9% 8.6 0s * 324 51 7 8.0000000 3.50000 56.2% 13.9 0s Cutting planes: Cover: 123 Explored 382 nodes (5773 simplex iterations) in 0.09 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%