Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:38:11 2012 Optimize a model with 1 rows, 26 columns and 26 nonzeros Model has 38 quadratic objective terms Presolve removed 0 rows and 1 columns Presolve time: 0.00s Presolved: 39 rows, 63 columns, 139 nonzeros Variable types: 0 continuous, 63 integer (62 binary) Found heuristic solution: objective 13.0000000 Root relaxation: objective 0.000000e+00, 43 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 14 13.00000 0.00000 100% - 0s H 0 0 11.0000000 0.00000 100% - 0s 0 0 0.00000 0 24 11.00000 0.00000 100% - 0s 0 0 0.00000 0 13 11.00000 0.00000 100% - 0s 0 0 0.00000 0 11 11.00000 0.00000 100% - 0s H 0 0 9.0000000 0.00000 100% - 0s 0 0 0.00000 0 14 9.00000 0.00000 100% - 0s 0 0 0.00000 0 13 9.00000 0.00000 100% - 0s 0 2 0.00000 0 11 9.00000 0.00000 100% - 0s H 67 35 8.0000000 0.00000 100% 4.7 0s H 68 34 6.0000000 0.00000 100% 4.8 0s Cutting planes: Cover: 67 MIR: 4 Zero half: 2 Explored 129 nodes (1194 simplex iterations) in 0.03 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.000000000000e+00, best bound 6.000000000000e+00, gap 0.0%