Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:11:50 2012 Optimize a model with 1 rows, 52 columns and 52 nonzeros Model has 65 quadratic objective terms Presolve removed 0 rows and 4 columns Presolve time: 0.00s Presolved: 66 rows, 113 columns, 243 nonzeros Variable types: 0 continuous, 113 integer (112 binary) Found heuristic solution: objective 21.0000000 Root relaxation: objective 0.000000e+00, 88 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 18 21.00000 0.00000 100% - 0s H 0 0 16.0000000 0.00000 100% - 0s 0 0 0.00000 0 18 16.00000 0.00000 100% - 0s H 0 0 14.0000000 0.00000 100% - 0s 0 0 0.00000 0 20 14.00000 0.00000 100% - 0s 0 0 0.00000 0 20 14.00000 0.00000 100% - 0s H 0 0 11.0000000 0.00000 100% - 0s 0 2 0.00000 0 13 11.00000 0.00000 100% - 0s H 165 96 10.0000000 0.00000 100% 4.0 0s * 234 100 11 9.0000000 0.00000 100% 5.4 0s H 267 92 8.0000000 1.00000 87.5% 6.9 0s * 355 64 9 7.0000000 3.00000 57.1% 11.7 0s Cutting planes: Cover: 124 Explored 427 nodes (5935 simplex iterations) in 0.09 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%