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 112 quadratic objective terms Presolve removed 0 rows and 31 columns Presolve time: 0.00s Presolved: 113 rows, 222 columns, 446 nonzeros Variable types: 0 continuous, 222 integer (221 binary) Found heuristic solution: objective 28.0000000 Root relaxation: objective 0.000000e+00, 138 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 35 28.00000 0.00000 100% - 0s 0 0 0.00000 0 16 28.00000 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 H 0 0 10.0000000 0.00000 100% - 0s H 0 0 9.0000000 0.00000 100% - 0s 0 0 0.00000 0 15 9.00000 0.00000 100% - 0s 0 0 0.00000 0 9 9.00000 0.00000 100% - 0s 0 0 0.00000 0 8 9.00000 0.00000 100% - 0s H 0 0 8.0000000 0.00000 100% - 0s 0 0 0.00000 0 7 8.00000 0.00000 100% - 0s H 0 0 6.0000000 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 7 5.00000 0.00000 100% - 0s 0 0 0.00000 0 9 5.00000 0.00000 100% - 0s 0 0 0.00000 0 9 5.00000 0.00000 100% - 0s H 0 0 4.0000000 0.00000 100% - 0s 0 2 0.00000 0 9 4.00000 0.00000 100% - 0s * 331 62 9 3.0000000 0.00000 100% 7.5 0s Cutting planes: Cover: 200 Explored 401 nodes (6833 simplex iterations) in 0.14 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.000000000000e+00, best bound 3.000000000000e+00, gap 0.0%