Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:41:59 2012 Optimize a model with 1 rows, 174 columns and 174 nonzeros Model has 155 quadratic objective terms Presolve removed 0 rows and 22 columns Presolve time: 0.00s Presolved: 156 rows, 307 columns, 617 nonzeros Variable types: 0 continuous, 307 integer (306 binary) Found heuristic solution: objective 46.0000000 Root relaxation: objective 0.000000e+00, 201 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 46.00000 0.00000 100% - 0s H 0 0 39.0000000 0.00000 100% - 0s 0 0 0.00000 0 37 39.00000 0.00000 100% - 0s H 0 0 31.0000000 0.00000 100% - 0s 0 0 0.00000 0 29 31.00000 0.00000 100% - 0s H 0 0 18.0000000 0.00000 100% - 0s H 0 0 15.0000000 0.00000 100% - 0s 0 0 0.00000 0 33 15.00000 0.00000 100% - 0s 0 0 0.00000 0 22 15.00000 0.00000 100% - 0s 0 0 0.00000 0 22 15.00000 0.00000 100% - 0s 0 0 0.00000 0 21 15.00000 0.00000 100% - 0s H 0 0 12.0000000 0.00000 100% - 0s 0 2 0.00000 0 20 12.00000 0.00000 100% - 0s H 27 27 11.0000000 0.00000 100% 1.4 0s H 54 44 10.0000000 0.00000 100% 1.9 0s H 244 140 8.0000000 0.00000 100% 3.3 0s H 271 135 7.0000000 0.00000 100% 3.3 0s H 488 93 4.0000000 0.00000 100% 6.7 0s Cutting planes: Cover: 278 Explored 624 nodes (11096 simplex iterations) in 0.23 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%