Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:36:56 2012 Optimize a model with 1 rows, 168 columns and 168 nonzeros Model has 168 quadratic objective terms Presolve removed 0 rows and 24 columns Presolve time: 0.00s Presolved: 169 rows, 312 columns, 648 nonzeros Variable types: 0 continuous, 312 integer (311 binary) Found heuristic solution: objective 49.0000000 Root relaxation: objective 0.000000e+00, 211 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 50 49.00000 0.00000 100% - 0s H 0 0 44.0000000 0.00000 100% - 0s 0 0 0.00000 0 35 44.00000 0.00000 100% - 0s H 0 0 30.0000000 0.00000 100% - 0s H 0 0 28.0000000 0.00000 100% - 0s 0 0 0.00000 0 47 28.00000 0.00000 100% - 0s 0 0 0.00000 0 22 28.00000 0.00000 100% - 0s H 0 0 22.0000000 0.00000 100% - 0s 0 0 0.00000 0 21 22.00000 0.00000 100% - 0s H 0 0 19.0000000 0.00000 100% - 0s H 0 0 18.0000000 0.00000 100% - 0s 0 0 0.00000 0 19 18.00000 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 H 0 0 12.0000000 0.00000 100% - 0s 0 0 0.00000 0 29 12.00000 0.00000 100% - 0s 0 0 0.00000 0 29 12.00000 0.00000 100% - 0s 0 2 0.00000 0 28 12.00000 0.00000 100% - 0s H 163 129 11.0000000 0.00000 100% 2.7 0s H 538 215 8.0000000 0.22222 97.2% 8.6 0s * 629 170 9 7.0000000 1.88889 73.0% 15.5 0s Cutting planes: Cover: 321 MIR: 3 Zero half: 2 Explored 809 nodes (25618 simplex iterations) in 0.51 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.000000000000e+00, best bound 7.000000000000e+00, gap 0.0%