Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:28:55 2012 Optimize a model with 1 rows, 157 columns and 157 nonzeros Model has 131 quadratic objective terms Presolve removed 0 rows and 26 columns Presolve time: 0.00s Presolved: 132 rows, 262 columns, 524 nonzeros Variable types: 0 continuous, 262 integer (261 binary) Found heuristic solution: objective 38.0000000 Root relaxation: objective 0.000000e+00, 165 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 32 38.00000 0.00000 100% - 0s H 0 0 30.0000000 0.00000 100% - 0s 0 0 0.00000 0 20 30.00000 0.00000 100% - 0s H 0 0 25.0000000 0.00000 100% - 0s 0 0 0.00000 0 30 25.00000 0.00000 100% - 0s H 0 0 20.0000000 0.00000 100% - 0s 0 0 0.00000 0 19 20.00000 0.00000 100% - 0s H 0 0 16.0000000 0.00000 100% - 0s H 0 0 15.0000000 0.00000 100% - 0s H 0 0 13.0000000 0.00000 100% - 0s 0 0 0.00000 0 18 13.00000 0.00000 100% - 0s 0 0 0.00000 0 20 13.00000 0.00000 100% - 0s 0 0 0.00000 0 18 13.00000 0.00000 100% - 0s H 0 0 12.0000000 0.00000 100% - 0s 0 2 0.00000 0 12 12.00000 0.00000 100% - 0s H 1 1 11.0000000 0.00000 100% 2.0 0s H 6 6 9.0000000 0.00000 100% 1.2 0s H 54 39 7.0000000 0.00000 100% 1.9 0s H 106 51 5.0000000 0.00000 100% 3.0 0s H 300 93 4.0000000 0.00000 100% 5.7 0s H 327 73 3.0000000 0.00000 100% 6.1 0s H 395 54 2.0000000 0.00000 100% 7.9 0s Cutting planes: Cover: 220 Explored 466 nodes (7470 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%