Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:27:12 2012 Optimize a model with 1 rows, 152 columns and 152 nonzeros Model has 143 quadratic objective terms Presolve removed 0 rows and 20 columns Presolve time: 0.00s Presolved: 144 rows, 275 columns, 561 nonzeros Variable types: 0 continuous, 275 integer (274 binary) Found heuristic solution: objective 39.0000000 Root relaxation: objective 0.000000e+00, 176 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 47 39.00000 0.00000 100% - 0s 0 0 0.00000 0 26 39.00000 0.00000 100% - 0s H 0 0 24.0000000 0.00000 100% - 0s H 0 0 23.0000000 0.00000 100% - 0s 0 0 0.00000 0 40 23.00000 0.00000 100% - 0s 0 0 0.00000 0 18 23.00000 0.00000 100% - 0s H 0 0 17.0000000 0.00000 100% - 0s 0 0 0.00000 0 17 17.00000 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 19 15.00000 0.00000 100% - 0s H 0 0 12.0000000 0.00000 100% - 0s 0 2 0.00000 0 18 12.00000 0.00000 100% - 0s H 27 27 9.0000000 0.00000 100% 2.2 0s H 54 45 8.0000000 0.00000 100% 2.7 0s H 81 59 7.0000000 0.00000 100% 3.2 0s H 495 183 6.0000000 0.05128 99.1% 12.3 0s Cutting planes: Cover: 272 MIR: 1 Zero half: 2 Explored 746 nodes (21246 simplex iterations) in 0.40 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.000000000000e+00, best bound 6.000000000000e+00, gap 0.0%