Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:40:42 2012 Optimize a model with 1 rows, 41 columns and 41 nonzeros Model has 75 quadratic objective terms Presolve time: 0.00s Presolved: 76 rows, 116 columns, 266 nonzeros Variable types: 0 continuous, 116 integer (116 binary) Found heuristic solution: objective 31.0000000 Root relaxation: objective 0.000000e+00, 100 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 27 31.00000 0.00000 100% - 0s H 0 0 26.0000000 0.00000 100% - 0s 0 0 0.00000 0 32 26.00000 0.00000 100% - 0s 0 0 0.00000 0 26 26.00000 0.00000 100% - 0s 0 0 0.00000 0 17 26.00000 0.00000 100% - 0s H 0 0 13.0000000 0.00000 100% - 0s 0 0 0.00000 0 19 13.00000 0.00000 100% - 0s 0 0 0.00000 0 15 13.00000 0.00000 100% - 0s 0 0 0.00000 0 29 13.00000 0.00000 100% - 0s 0 0 0.00000 0 27 13.00000 0.00000 100% - 0s 0 2 0.00000 0 27 13.00000 0.00000 100% - 0s * 176 67 10 12.0000000 1.00000 91.7% 9.7 0s Cutting planes: Gomory: 3 Cover: 140 Explored 270 nodes (4629 simplex iterations) in 0.08 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.200000000000e+01, best bound 1.200000000000e+01, gap 0.0%