Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:40:31 2012 Optimize a model with 1 rows, 172 columns and 172 nonzeros Model has 150 quadratic objective terms Presolve removed 0 rows and 28 columns Presolve time: 0.00s Presolved: 151 rows, 294 columns, 594 nonzeros Variable types: 0 continuous, 294 integer (293 binary) Found heuristic solution: objective 41.0000000 Root relaxation: objective 0.000000e+00, 188 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 34 41.00000 0.00000 100% - 0s H 0 0 29.0000000 0.00000 100% - 0s 0 0 0.00000 0 29 29.00000 0.00000 100% - 0s H 0 0 25.0000000 0.00000 100% - 0s 0 0 0.00000 0 25 25.00000 0.00000 100% - 0s H 0 0 20.0000000 0.00000 100% - 0s H 0 0 15.0000000 0.00000 100% - 0s 0 0 0.00000 0 31 15.00000 0.00000 100% - 0s 0 0 0.00000 0 17 15.00000 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 27 27 9.0000000 0.00000 100% 2.5 0s H 128 84 7.0000000 0.00000 100% 4.1 0s H 133 75 6.0000000 0.00000 100% 4.1 0s H 144 63 5.0000000 0.00000 100% 4.1 0s H 490 132 4.0000000 0.00000 100% 10.9 0s Cutting planes: Cover: 263 Explored 628 nodes (12646 simplex iterations) in 0.24 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%