Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:39 2012 Optimize a model with 168 rows, 55 columns and 336 nonzeros Presolve removed 64 rows and 2 columns Presolve time: 0.00s Presolved: 104 rows, 53 columns, 250 nonzeros Variable types: 0 continuous, 53 integer (53 binary) Found heuristic solution: objective 20.0000000 Root relaxation: objective 2.220000e+01, 79 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 22.20000 0 46 20.00000 22.20000 11.0% - 0s 0 0 21.58491 0 51 20.00000 21.58491 7.92% - 0s 0 0 21.33333 0 39 20.00000 21.33333 6.67% - 0s 0 0 21.00000 0 47 20.00000 21.00000 5.00% - 0s 0 0 21.00000 0 31 20.00000 21.00000 5.00% - 0s H 0 0 21.0000000 21.00000 0.0% - 0s Cutting planes: Zero half: 10 Explored 0 nodes (159 simplex iterations) in 0.01 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.100000000000e+01, best bound 2.100000000000e+01, gap 0.0%