Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:22:59 2012 Optimize a model with 1 rows, 136 columns and 136 nonzeros Model has 108 quadratic objective terms Presolve removed 0 rows and 27 columns Presolve time: 0.00s Presolved: 109 rows, 217 columns, 433 nonzeros Variable types: 0 continuous, 217 integer (216 binary) Found heuristic solution: objective 25.0000000 Root relaxation: objective 0.000000e+00, 133 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 25.00000 0.00000 100% - 0s H 0 0 19.0000000 0.00000 100% - 0s 0 0 0.00000 0 15 19.00000 0.00000 100% - 0s H 0 0 13.0000000 0.00000 100% - 0s H 0 0 12.0000000 0.00000 100% - 0s 0 0 0.00000 0 14 12.00000 0.00000 100% - 0s 0 0 0.00000 0 14 12.00000 0.00000 100% - 0s 0 0 0.00000 0 13 12.00000 0.00000 100% - 0s H 0 0 7.0000000 0.00000 100% - 0s 0 2 0.00000 0 13 7.00000 0.00000 100% - 0s H 246 47 4.0000000 0.00000 100% 5.0 0s H 253 31 3.0000000 0.00000 100% 5.2 0s * 271 7 9 1.0000000 0.00000 100% 5.2 0s Cutting planes: Cover: 134 Explored 272 nodes (1650 simplex iterations) in 0.05 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.000000000000e+00, best bound 1.000000000000e+00, gap 0.0%