Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:28:36 2012 Optimize a model with 1 rows, 156 columns and 156 nonzeros Model has 129 quadratic objective terms Presolve removed 0 rows and 28 columns Presolve time: 0.00s Presolved: 130 rows, 257 columns, 515 nonzeros Variable types: 0 continuous, 257 integer (256 binary) Found heuristic solution: objective 26.0000000 Root relaxation: objective 0.000000e+00, 157 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 29 26.00000 0.00000 100% - 0s 0 0 0.00000 0 15 26.00000 0.00000 100% - 0s H 0 0 14.0000000 0.00000 100% - 0s 0 0 0.00000 0 14 14.00000 0.00000 100% - 0s H 0 0 11.0000000 0.00000 100% - 0s 0 0 0.00000 0 33 11.00000 0.00000 100% - 0s 0 0 0.00000 0 16 11.00000 0.00000 100% - 0s 0 0 0.00000 0 13 11.00000 0.00000 100% - 0s 0 0 0.00000 0 12 11.00000 0.00000 100% - 0s 0 0 0.00000 0 10 11.00000 0.00000 100% - 0s H 0 0 10.0000000 0.00000 100% - 0s 0 0 0.00000 0 6 10.00000 0.00000 100% - 0s H 0 0 6.0000000 0.00000 100% - 0s 0 0 0.00000 0 8 6.00000 0.00000 100% - 0s 0 0 0.00000 0 11 6.00000 0.00000 100% - 0s H 0 0 4.0000000 0.00000 100% - 0s 0 0 0.00000 0 13 4.00000 0.00000 100% - 0s 0 0 0.00000 0 13 4.00000 0.00000 100% - 0s 0 2 0.00000 0 13 4.00000 0.00000 100% - 0s Cutting planes: Cover: 224 MIR: 2 Zero half: 1 Explored 632 nodes (13262 simplex iterations) in 0.23 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%