Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:44:34 2012 Optimize a model with 1 rows, 177 columns and 177 nonzeros Model has 164 quadratic objective terms Presolve removed 0 rows and 19 columns Presolve time: 0.00s Presolved: 165 rows, 322 columns, 650 nonzeros Variable types: 0 continuous, 322 integer (321 binary) Found heuristic solution: objective 48.0000000 Root relaxation: objective 0.000000e+00, 205 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 50 48.00000 0.00000 100% - 0s 0 0 0.00000 0 34 48.00000 0.00000 100% - 0s H 0 0 31.0000000 0.00000 100% - 0s H 0 0 21.0000000 0.00000 100% - 0s 0 0 0.00000 0 48 21.00000 0.00000 100% - 0s 0 0 0.00000 0 26 21.00000 0.00000 100% - 0s 0 0 0.00000 0 34 21.00000 0.00000 100% - 0s 0 0 0.00000 0 16 21.00000 0.00000 100% - 0s H 0 0 16.0000000 0.00000 100% - 0s 0 0 0.00000 0 20 16.00000 0.00000 100% - 0s H 0 0 13.0000000 0.00000 100% - 0s 0 0 0.00000 0 21 13.00000 0.00000 100% - 0s 0 0 0.00000 0 21 13.00000 0.00000 100% - 0s 0 2 0.00000 0 21 13.00000 0.00000 100% - 0s H 145 72 9.0000000 0.00000 100% 3.1 0s H 300 142 7.0000000 0.00000 100% 5.4 0s * 403 152 41 6.0000000 0.00000 100% 6.4 0s * 419 131 26 5.0000000 0.00000 100% 6.7 0s H 465 66 3.0000000 0.00000 100% 8.3 0s H 498 31 2.0000000 0.00000 100% 9.8 0s Cutting planes: Cover: 286 MIR: 6 Zero half: 2 Explored 534 nodes (7905 simplex iterations) in 0.20 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%