Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:11:16 2012 Optimize a model with 1 rows, 49 columns and 49 nonzeros Model has 71 quadratic objective terms Presolve removed 0 rows and 1 columns Presolve time: 0.00s Presolved: 72 rows, 119 columns, 261 nonzeros Variable types: 0 continuous, 119 integer (118 binary) Found heuristic solution: objective 22.0000000 Root relaxation: objective 0.000000e+00, 89 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 19 22.00000 0.00000 100% - 0s H 0 0 17.0000000 0.00000 100% - 0s 0 0 0.00000 0 21 17.00000 0.00000 100% - 0s H 0 0 11.0000000 0.00000 100% - 0s 0 0 0.00000 0 23 11.00000 0.00000 100% - 0s 0 0 0.00000 0 23 11.00000 0.00000 100% - 0s H 0 0 8.0000000 0.00000 100% - 0s 0 2 0.00000 0 23 8.00000 0.00000 100% - 0s H 132 42 7.0000000 0.00000 100% 12.9 0s Cutting planes: Cover: 134 Explored 186 nodes (3998 simplex iterations) in 0.06 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%