Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:20:05 2012 Optimize a model with 1 rows, 121 columns and 121 nonzeros Model has 87 quadratic objective terms Presolve removed 0 rows and 31 columns Presolve time: 0.00s Presolved: 88 rows, 177 columns, 351 nonzeros Variable types: 0 continuous, 177 integer (176 binary) Found heuristic solution: objective 19.0000000 Root relaxation: objective 0.000000e+00, 109 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 12 19.00000 0.00000 100% - 0s H 0 0 12.0000000 0.00000 100% - 0s 0 0 0.00000 0 11 12.00000 0.00000 100% - 0s H 0 0 8.0000000 0.00000 100% - 0s 0 0 0.00000 0 11 8.00000 0.00000 100% - 0s 0 0 0.00000 0 8 8.00000 0.00000 100% - 0s H 0 0 7.0000000 0.00000 100% - 0s 0 0 0.00000 0 3 7.00000 0.00000 100% - 0s H 0 0 2.0000000 0.00000 100% - 0s 0 0 0.00000 0 3 2.00000 0.00000 100% - 0s 0 0 0.00000 0 3 2.00000 0.00000 100% - 0s 0 2 0.00000 0 3 2.00000 0.00000 100% - 0s H 1 1 1.0000000 0.00000 100% 80.0 0s Cutting planes: Cover: 40 Explored 2 nodes (532 simplex iterations) in 0.02 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%