Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:33:34 2012 Optimize a model with 1 rows, 160 columns and 160 nonzeros Model has 137 quadratic objective terms Presolve removed 0 rows and 26 columns Presolve time: 0.00s Presolved: 138 rows, 271 columns, 545 nonzeros Variable types: 0 continuous, 271 integer (270 binary) Found heuristic solution: objective 35.0000000 Root relaxation: objective 0.000000e+00, 171 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 35.00000 0.00000 100% - 0s H 0 0 27.0000000 0.00000 100% - 0s 0 0 0.00000 0 27 27.00000 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 17.0000000 0.00000 100% - 0s H 0 0 14.0000000 0.00000 100% - 0s 0 0 0.00000 0 24 14.00000 0.00000 100% - 0s 0 0 0.00000 0 17 14.00000 0.00000 100% - 0s 0 0 0.00000 0 13 14.00000 0.00000 100% - 0s H 0 0 12.0000000 0.00000 100% - 0s H 0 0 10.0000000 0.00000 100% - 0s 0 0 0.00000 0 11 10.00000 0.00000 100% - 0s H 0 0 9.0000000 0.00000 100% - 0s 0 0 0.00000 0 11 9.00000 0.00000 100% - 0s 0 0 0.00000 0 11 9.00000 0.00000 100% - 0s H 0 0 8.0000000 0.00000 100% - 0s 0 2 0.00000 0 11 8.00000 0.00000 100% - 0s H 27 27 7.0000000 0.00000 100% 3.0 0s H 135 71 6.0000000 0.00000 100% 3.5 0s * 351 137 18 5.0000000 0.00000 100% 8.1 0s H 381 101 4.0000000 0.00000 100% 7.9 0s Cutting planes: Cover: 233 Explored 532 nodes (13640 simplex iterations) in 0.25 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%