Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:28:17 2012 Optimize a model with 1 rows, 155 columns and 155 nonzeros Model has 150 quadratic objective terms Presolve removed 0 rows and 23 columns Presolve time: 0.00s Presolved: 151 rows, 282 columns, 582 nonzeros Variable types: 0 continuous, 282 integer (281 binary) Found heuristic solution: objective 44.0000000 Root relaxation: objective 0.000000e+00, 183 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 44 44.00000 0.00000 100% - 0s 0 0 0.00000 0 30 44.00000 0.00000 100% - 0s H 0 0 22.0000000 0.00000 100% - 0s H 0 0 21.0000000 0.00000 100% - 0s 0 0 0.00000 0 42 21.00000 0.00000 100% - 0s 0 0 0.00000 0 23 21.00000 0.00000 100% - 0s H 0 0 18.0000000 0.00000 100% - 0s 0 0 0.00000 0 38 18.00000 0.00000 100% - 0s 0 0 0.00000 0 19 18.00000 0.00000 100% - 0s H 0 0 15.0000000 0.00000 100% - 0s H 0 0 13.0000000 0.00000 100% - 0s 0 2 0.00000 0 16 13.00000 0.00000 100% - 0s H 27 27 10.0000000 0.00000 100% 1.6 0s H 81 50 9.0000000 0.00000 100% 2.5 0s H 108 53 7.0000000 0.00000 100% 3.2 0s H 376 101 6.0000000 0.00000 100% 10.7 0s Cutting planes: Cover: 286 Explored 535 nodes (16796 simplex iterations) in 0.31 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.000000000000e+00, best bound 6.000000000000e+00, gap 0.0%