Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:24:09 2012 Optimize a model with 1 rows, 141 columns and 141 nonzeros Model has 108 quadratic objective terms Presolve removed 0 rows and 31 columns Presolve time: 0.00s Presolved: 109 rows, 218 columns, 434 nonzeros Variable types: 0 continuous, 218 integer (217 binary) Found heuristic solution: objective 30.0000000 Root relaxation: objective 0.000000e+00, 123 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 16 30.00000 0.00000 100% - 0s H 0 0 15.0000000 0.00000 100% - 0s 0 0 0.00000 0 18 15.00000 0.00000 100% - 0s H 0 0 14.0000000 0.00000 100% - 0s 0 0 0.00000 0 16 14.00000 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 H 0 0 11.0000000 0.00000 100% - 0s 0 0 0.00000 0 14 11.00000 0.00000 100% - 0s 0 0 0.00000 0 8 11.00000 0.00000 100% - 0s H 0 0 5.0000000 0.00000 100% - 0s 0 0 0.00000 0 15 5.00000 0.00000 100% - 0s 0 0 0.00000 0 15 5.00000 0.00000 100% - 0s 0 2 0.00000 0 15 5.00000 0.00000 100% - 0s H 109 38 4.0000000 0.00000 100% 2.6 0s H 217 61 3.0000000 0.00000 100% 4.2 0s H 271 34 2.0000000 0.00000 100% 5.7 0s Cutting planes: Cover: 193 Explored 384 nodes (4665 simplex iterations) in 0.10 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%