Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:00 2012 Optimize a model with 99 rows, 62 columns and 198 nonzeros Presolve removed 42 rows and 20 columns Presolve time: 0.00s Presolved: 57 rows, 42 columns, 117 nonzeros Variable types: 0 continuous, 42 integer (42 binary) Found heuristic solution: objective 29.0000000 Root relaxation: objective 3.150000e+01, 48 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 31.50000 0 27 29.00000 31.50000 8.62% - 0s H 0 0 31.0000000 31.50000 1.61% - 0s Explored 0 nodes (78 simplex iterations) in 0.00 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.100000000000e+01, best bound 3.100000000000e+01, gap 0.0%