Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:12:55 2012 Optimize a model with 1 rows, 57 columns and 57 nonzeros Model has 80 quadratic objective terms Presolve removed 0 rows and 2 columns Presolve time: 0.00s Presolved: 81 rows, 135 columns, 295 nonzeros Variable types: 0 continuous, 135 integer (134 binary) Found heuristic solution: objective 29.0000000 Root relaxation: objective 0.000000e+00, 99 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 26 29.00000 0.00000 100% - 0s H 0 0 18.0000000 0.00000 100% - 0s 0 0 0.00000 0 32 18.00000 0.00000 100% - 0s H 0 0 15.0000000 0.00000 100% - 0s 0 0 0.00000 0 19 15.00000 0.00000 100% - 0s 0 0 0.00000 0 23 15.00000 0.00000 100% - 0s 0 0 0.00000 0 12 15.00000 0.00000 100% - 0s H 0 0 12.0000000 0.00000 100% - 0s H 0 0 11.0000000 0.00000 100% - 0s 0 0 0.00000 0 16 11.00000 0.00000 100% - 0s 0 0 0.00000 0 16 11.00000 0.00000 100% - 0s H 0 0 10.0000000 0.00000 100% - 0s 0 2 0.00000 0 16 10.00000 0.00000 100% - 0s H 187 102 9.0000000 0.00000 100% 6.9 0s * 225 102 11 8.0000000 0.00000 100% 9.4 0s * 357 0 9 7.0000000 7.00000 0.0% 19.5 0s Cutting planes: Cover: 151 MIR: 1 Zero half: 1 Explored 358 nodes (7288 simplex iterations) in 0.12 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%