Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:39 2012 Optimize a model with 156 rows, 52 columns and 312 nonzeros Presolve removed 76 rows and 11 columns Presolve time: 0.00s Presolved: 80 rows, 41 columns, 178 nonzeros Variable types: 0 continuous, 41 integer (41 binary) Found heuristic solution: objective 20.0000000 Root relaxation: objective 2.150000e+01, 47 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 21.50000 0 27 20.00000 21.50000 7.50% - 0s H 0 0 21.0000000 21.50000 2.38% - 0s Explored 0 nodes (64 simplex iterations) in 0.00 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%