Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:12:41 2012 Optimize a model with 1 rows, 56 columns and 56 nonzeros Model has 92 quadratic objective terms Presolve removed 0 rows and 1 columns Presolve time: 0.00s Presolved: 93 rows, 147 columns, 331 nonzeros Variable types: 0 continuous, 147 integer (146 binary) Found heuristic solution: objective 37.0000000 Root relaxation: objective 0.000000e+00, 118 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 35 37.00000 0.00000 100% - 0s H 0 0 33.0000000 0.00000 100% - 0s 0 0 0.00000 0 30 33.00000 0.00000 100% - 0s H 0 0 27.0000000 0.00000 100% - 0s H 0 0 21.0000000 0.00000 100% - 0s H 0 0 18.0000000 0.00000 100% - 0s 0 0 0.00000 0 68 18.00000 0.00000 100% - 0s 0 0 0.00000 0 30 18.00000 0.00000 100% - 0s 0 0 0.00000 0 22 18.00000 0.00000 100% - 0s 0 0 0.00000 0 29 18.00000 0.00000 100% - 0s 0 0 0.00000 0 17 18.00000 0.00000 100% - 0s H 0 0 17.0000000 0.00000 100% - 0s H 0 0 15.0000000 0.00000 100% - 0s H 0 0 14.0000000 0.00000 100% - 0s 0 0 0.00000 0 23 14.00000 0.00000 100% - 0s 0 0 0.00000 0 17 14.00000 0.00000 100% - 0s 0 0 0.00000 0 26 14.00000 0.00000 100% - 0s 0 0 0.00000 0 26 14.00000 0.00000 100% - 0s 0 2 0.00000 0 26 14.00000 0.00000 100% - 0s H 443 105 13.0000000 3.00000 76.9% 17.2 0s Cutting planes: Cover: 174 MIR: 16 Zero half: 11 Explored 611 nodes (13686 simplex iterations) in 0.28 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%