Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:12:26 2012 Optimize a model with 1 rows, 55 columns and 55 nonzeros Model has 103 quadratic objective terms Presolve time: 0.00s Presolved: 104 rows, 158 columns, 364 nonzeros Variable types: 0 continuous, 158 integer (158 binary) Found heuristic solution: objective 51.0000000 Root relaxation: objective 0.000000e+00, 135 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 28 51.00000 0.00000 100% - 0s H 0 0 24.0000000 0.00000 100% - 0s 0 0 0.00000 0 41 24.00000 0.00000 100% - 0s H 0 0 22.0000000 0.00000 100% - 0s 0 0 0.00000 0 29 22.00000 0.00000 100% - 0s 0 0 0.00000 0 27 22.00000 0.00000 100% - 0s 0 0 0.00000 0 22 22.00000 0.00000 100% - 0s 0 0 0.00000 0 28 22.00000 0.00000 100% - 0s 0 0 0.00000 0 36 22.00000 0.00000 100% - 0s 0 0 0.00000 0 36 22.00000 0.00000 100% - 0s 0 2 0.00000 0 23 22.00000 0.00000 100% - 0s H 27 27 21.0000000 0.00000 100% 2.3 0s H 209 148 19.0000000 0.00000 100% 7.0 0s H 216 144 18.0000000 0.00000 100% 7.1 0s * 252 121 14 16.0000000 0.00000 100% 8.4 0s * 382 113 8 15.0000000 2.00000 86.7% 14.6 0s Cutting planes: Cover: 199 Explored 594 nodes (12819 simplex iterations) in 0.24 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.500000000000e+01, best bound 1.500000000000e+01, gap 0.0%