Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:25:10 2012 Optimize a model with 1 rows, 145 columns and 145 nonzeros Model has 120 quadratic objective terms Presolve removed 0 rows and 22 columns Presolve time: 0.00s Presolved: 121 rows, 243 columns, 483 nonzeros Variable types: 0 continuous, 243 integer (242 binary) Found heuristic solution: objective 31.0000000 Root relaxation: objective 0.000000e+00, 147 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 31 31.00000 0.00000 100% - 0s 0 0 0.00000 0 26 31.00000 0.00000 100% - 0s H 0 0 25.0000000 0.00000 100% - 0s 0 0 0.00000 0 21 25.00000 0.00000 100% - 0s H 0 0 10.0000000 0.00000 100% - 0s H 0 0 8.0000000 0.00000 100% - 0s 0 0 0.00000 0 16 8.00000 0.00000 100% - 0s 0 0 0.00000 0 38 8.00000 0.00000 100% - 0s 0 0 0.00000 0 22 8.00000 0.00000 100% - 0s 0 0 0.00000 0 19 8.00000 0.00000 100% - 0s 0 0 0.00000 0 23 8.00000 0.00000 100% - 0s 0 0 0.00000 0 23 8.00000 0.00000 100% - 0s 0 0 0.00000 0 13 8.00000 0.00000 100% - 0s 0 2 0.00000 0 13 8.00000 0.00000 100% - 0s H 90 25 4.0000000 0.00000 100% 2.4 0s H 404 72 3.0000000 0.00000 100% 7.1 0s * 474 28 6 2.0000000 1.00000 50.0% 10.2 0s Cutting planes: Cover: 207 MIR: 7 Zero half: 1 Explored 503 nodes (6947 simplex iterations) in 0.14 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%