Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:13:13 2012 Optimize a model with 1 rows, 58 columns and 58 nonzeros Model has 73 quadratic objective terms Presolve removed 0 rows and 4 columns Presolve time: 0.00s Presolved: 74 rows, 127 columns, 273 nonzeros Variable types: 0 continuous, 127 integer (126 binary) Found heuristic solution: objective 23.0000000 Root relaxation: objective 0.000000e+00, 97 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 21 23.00000 0.00000 100% - 0s H 0 0 18.0000000 0.00000 100% - 0s 0 0 0.00000 0 24 18.00000 0.00000 100% - 0s 0 0 0.00000 0 24 18.00000 0.00000 100% - 0s 0 0 0.00000 0 22 18.00000 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 97 72 15.0000000 0.00000 100% 3.3 0s H 99 69 14.0000000 0.00000 100% 3.4 0s H 111 73 12.0000000 0.00000 100% 3.3 0s * 299 93 7 9.0000000 1.00000 88.9% 7.8 0s * 343 79 10 8.0000000 2.00000 75.0% 8.6 0s Cutting planes: Cover: 141 MIR: 1 Zero half: 2 Explored 444 nodes (6625 simplex iterations) in 0.11 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.000000000000e+00, best bound 8.000000000000e+00, gap 0.0%