Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:37 2012 Optimize a model with 87 rows, 40 columns and 174 nonzeros Presolve removed 37 rows and 12 columns Presolve time: 0.00s Presolved: 50 rows, 28 columns, 102 nonzeros Variable types: 0 continuous, 28 integer (28 binary) Found heuristic solution: objective 17.0000000 Root relaxation: objective 1.800000e+01, 35 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 18.00000 0 24 17.00000 18.00000 5.88% - 0s 0 0 infeasible 0 17.00000 17.99998 5.88% - 0s Explored 0 nodes (65 simplex iterations) in 0.00 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.700000000000e+01, best bound 1.700000000000e+01, gap 0.0%