Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:41:35 2012 Optimize a model with 1 rows, 173 columns and 173 nonzeros Model has 155 quadratic objective terms Presolve removed 0 rows and 24 columns Presolve time: 0.00s Presolved: 156 rows, 304 columns, 614 nonzeros Variable types: 0 continuous, 304 integer (303 binary) Found heuristic solution: objective 36.0000000 Root relaxation: objective 0.000000e+00, 191 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 46 36.00000 0.00000 100% - 0s 0 0 0.00000 0 34 36.00000 0.00000 100% - 0s H 0 0 29.0000000 0.00000 100% - 0s 0 0 0.00000 0 37 29.00000 0.00000 100% - 0s H 0 0 27.0000000 0.00000 100% - 0s 0 0 0.00000 0 32 27.00000 0.00000 100% - 0s 0 0 0.00000 0 17 27.00000 0.00000 100% - 0s H 0 0 13.0000000 0.00000 100% - 0s H 0 0 11.0000000 0.00000 100% - 0s 0 0 0.00000 0 17 11.00000 0.00000 100% - 0s 0 0 0.00000 0 17 11.00000 0.00000 100% - 0s H 0 0 10.0000000 0.00000 100% - 0s 0 2 0.00000 0 17 10.00000 0.00000 100% - 0s H 135 82 9.0000000 0.00000 100% 4.0 0s H 363 151 8.0000000 0.00000 100% 7.1 0s H 453 169 7.0000000 0.00000 100% 7.0 0s H 455 145 6.0000000 0.00000 100% 7.1 0s H 461 108 5.0000000 0.00000 100% 7.1 0s * 583 33 12 4.0000000 1.73333 56.7% 17.3 0s Cutting planes: Cover: 275 MIR: 2 Explored 617 nodes (12456 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%