Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:28:55 2012 Optimize a model with 1 rows, 157 columns and 157 nonzeros Model has 127 quadratic objective terms Presolve removed 0 rows and 25 columns Presolve time: 0.00s Presolved: 128 rows, 259 columns, 513 nonzeros Variable types: 0 continuous, 259 integer (258 binary) Found heuristic solution: objective 34.0000000 Root relaxation: objective 0.000000e+00, 159 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 38 34.00000 0.00000 100% - 0s 0 0 0.00000 0 32 34.00000 0.00000 100% - 0s H 0 0 30.0000000 0.00000 100% - 0s 0 0 0.00000 0 18 30.00000 0.00000 100% - 0s H 0 0 14.0000000 0.00000 100% - 0s H 0 0 12.0000000 0.00000 100% - 0s 0 0 0.00000 0 25 12.00000 0.00000 100% - 0s H 0 0 10.0000000 0.00000 100% - 0s 0 0 0.00000 0 17 10.00000 0.00000 100% - 0s 0 0 0.00000 0 13 10.00000 0.00000 100% - 0s 0 0 0.00000 0 15 10.00000 0.00000 100% - 0s 0 0 0.00000 0 12 10.00000 0.00000 100% - 0s 0 0 0.00000 0 8 10.00000 0.00000 100% - 0s H 0 0 5.0000000 0.00000 100% - 0s 0 0 0.00000 0 6 5.00000 0.00000 100% - 0s 0 0 0.00000 0 8 5.00000 0.00000 100% - 0s 0 0 0.00000 0 7 5.00000 0.00000 100% - 0s H 0 0 4.0000000 0.00000 100% - 0s 0 0 0.00000 0 12 4.00000 0.00000 100% - 0s 0 0 0.00000 0 9 4.00000 0.00000 100% - 0s 0 2 0.00000 0 9 4.00000 0.00000 100% - 0s H 402 85 3.0000000 0.00000 100% 5.2 0s * 429 50 25 2.0000000 0.00000 100% 5.7 0s Cutting planes: Cover: 219 Explored 553 nodes (7701 simplex iterations) in 0.16 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.000000000000e+00, best bound 2.000000000000e+00, gap 0.0%