Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:38 2012 Optimize a model with 97 rows, 46 columns and 194 nonzeros Presolve removed 37 rows and 9 columns Presolve time: 0.00s Presolved: 60 rows, 37 columns, 131 nonzeros Variable types: 0 continuous, 37 integer (37 binary) Found heuristic solution: objective 19.0000000 Root relaxation: objective 2.150000e+01, 42 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 31 19.00000 21.50000 13.2% - 0s H 0 0 20.0000000 21.50000 7.50% - 0s H 0 0 21.0000000 21.50000 2.38% - 0s Explored 0 nodes (71 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%