Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:26:00 2012 Optimize a model with 1 rows, 148 columns and 148 nonzeros Model has 127 quadratic objective terms Presolve removed 0 rows and 30 columns Presolve time: 0.00s Presolved: 128 rows, 245 columns, 499 nonzeros Variable types: 0 continuous, 245 integer (244 binary) Found heuristic solution: objective 30.0000000 Root relaxation: objective 0.000000e+00, 157 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 28 30.00000 0.00000 100% - 0s H 0 0 23.0000000 0.00000 100% - 0s 0 0 0.00000 0 43 23.00000 0.00000 100% - 0s H 0 0 19.0000000 0.00000 100% - 0s 0 0 0.00000 0 24 19.00000 0.00000 100% - 0s 0 0 0.00000 0 24 19.00000 0.00000 100% - 0s 0 0 0.00000 0 13 19.00000 0.00000 100% - 0s H 0 0 11.0000000 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 14 9.00000 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 11 8.00000 0.00000 100% - 0s 0 0 0.00000 0 11 8.00000 0.00000 100% - 0s 0 2 0.00000 0 11 8.00000 0.00000 100% - 0s H 279 122 7.0000000 0.00000 100% 4.2 0s H 363 143 6.0000000 0.00000 100% 7.4 0s * 415 117 10 5.0000000 1.00000 80.0% 8.5 0s * 425 74 7 4.0000000 1.00000 75.0% 10.5 0s Cutting planes: Cover: 240 MIR: 5 Zero half: 2 Explored 505 nodes (11742 simplex iterations) in 0.22 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%