Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:39:57 2012 Optimize a model with 1 rows, 171 columns and 171 nonzeros Model has 169 quadratic objective terms Presolve removed 0 rows and 26 columns Presolve time: 0.00s Presolved: 170 rows, 314 columns, 652 nonzeros Variable types: 0 continuous, 314 integer (313 binary) Found heuristic solution: objective 46.0000000 Root relaxation: objective 0.000000e+00, 213 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 45 46.00000 0.00000 100% - 0s H 0 0 36.0000000 0.00000 100% - 0s 0 0 0.00000 0 60 36.00000 0.00000 100% - 0s H 0 0 33.0000000 0.00000 100% - 0s 0 0 0.00000 0 33 33.00000 0.00000 100% - 0s 0 0 0.00000 0 26 33.00000 0.00000 100% - 0s H 0 0 24.0000000 0.00000 100% - 0s H 0 0 21.0000000 0.00000 100% - 0s 0 0 0.00000 0 27 21.00000 0.00000 100% - 0s 0 0 0.00000 0 25 21.00000 0.00000 100% - 0s H 0 0 16.0000000 0.00000 100% - 0s 0 2 0.00000 0 22 16.00000 0.00000 100% - 0s H 81 50 12.0000000 0.00000 100% 1.7 0s H 409 215 9.0000000 0.00000 100% 6.0 0s H 464 231 8.0000000 0.00000 100% 6.8 0s H 574 198 7.0000000 1.00000 85.7% 11.7 0s Cutting planes: Cover: 311 MIR: 1 Zero half: 1 Explored 815 nodes (25984 simplex iterations) in 0.50 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%