Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:05 2012 Optimize a model with 182 rows, 88 columns and 364 nonzeros Presolve removed 42 rows and 14 columns Presolve time: 0.00s Presolved: 140 rows, 74 columns, 286 nonzeros Variable types: 0 continuous, 74 integer (74 binary) Found heuristic solution: objective 38.0000000 Root relaxation: objective 4.166667e+01, 98 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 41.66667 0 67 38.00000 41.66667 9.65% - 0s H 0 0 40.0000000 41.66667 4.17% - 0s 0 0 41.00000 0 50 40.00000 41.00000 2.50% - 0s 0 0 cutoff 0 40.00000 40.99996 2.50% - 0s Cutting planes: Gomory: 1 Zero half: 37 Explored 0 nodes (158 simplex iterations) in 0.01 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+01, best bound 4.000000000000e+01, gap 0.0%