Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:12:02 2012 Optimize a model with 1 rows, 53 columns and 53 nonzeros Model has 83 quadratic objective terms Presolve removed 0 rows and 1 columns Presolve time: 0.00s Presolved: 84 rows, 135 columns, 301 nonzeros Variable types: 0 continuous, 135 integer (134 binary) Found heuristic solution: objective 36.0000000 Root relaxation: objective 0.000000e+00, 106 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 26 36.00000 0.00000 100% - 0s H 0 0 24.0000000 0.00000 100% - 0s 0 0 0.00000 0 22 24.00000 0.00000 100% - 0s H 0 0 18.0000000 0.00000 100% - 0s 0 0 0.00000 0 29 18.00000 0.00000 100% - 0s 0 0 0.00000 0 20 18.00000 0.00000 100% - 0s H 0 0 17.0000000 0.00000 100% - 0s 0 0 0.00000 0 24 17.00000 0.00000 100% - 0s 0 0 0.00000 0 18 17.00000 0.00000 100% - 0s 0 0 0.00000 0 23 17.00000 0.00000 100% - 0s 0 0 0.00000 0 23 17.00000 0.00000 100% - 0s 0 2 0.00000 0 23 17.00000 0.00000 100% - 0s H 162 111 16.0000000 0.00000 100% 4.9 0s H 189 103 13.0000000 0.00000 100% 5.5 0s * 245 98 14 12.0000000 0.00000 100% 8.5 0s H 495 13 11.0000000 9.54545 13.2% 18.3 0s Cutting planes: Cover: 155 Explored 517 nodes (9611 simplex iterations) in 0.17 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.100000000000e+01, best bound 1.100000000000e+01, gap 0.0%