Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:39:24 2012 Optimize a model with 1 rows, 36 columns and 36 nonzeros Model has 70 quadratic objective terms Presolve time: 0.00s Presolved: 71 rows, 106 columns, 246 nonzeros Variable types: 0 continuous, 106 integer (106 binary) Found heuristic solution: objective 26.0000000 Root relaxation: objective 0.000000e+00, 87 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 22 26.00000 0.00000 100% - 0s H 0 0 20.0000000 0.00000 100% - 0s 0 0 0.00000 0 40 20.00000 0.00000 100% - 0s 0 0 0.00000 0 18 20.00000 0.00000 100% - 0s H 0 0 18.0000000 0.00000 100% - 0s 0 0 0.00000 0 23 18.00000 0.00000 100% - 0s 0 0 0.00000 0 23 18.00000 0.00000 100% - 0s H 0 0 14.0000000 0.00000 100% - 0s 0 2 0.00000 0 23 14.00000 0.00000 100% - 0s * 219 62 14 13.0000000 4.00000 69.2% 16.1 0s Cutting planes: Cover: 131 MIR: 2 Zero half: 1 Explored 305 nodes (5880 simplex iterations) in 0.09 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.300000000000e+01, best bound 1.300000000000e+01, gap 0.0%