Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:39 2012 Optimize a model with 155 rows, 56 columns and 310 nonzeros Presolve removed 50 rows and 7 columns Presolve time: 0.00s Presolved: 105 rows, 49 columns, 230 nonzeros Variable types: 0 continuous, 49 integer (49 binary) Found heuristic solution: objective 21.0000000 Root relaxation: objective 2.437500e+01, 69 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 24.37500 0 48 21.00000 24.37500 16.1% - 0s H 0 0 23.0000000 24.37500 5.98% - 0s 0 0 infeasible 0 23.00000 23.99998 4.35% - 0s Cutting planes: Gomory: 2 Zero half: 33 Explored 0 nodes (82 simplex iterations) in 0.00 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.300000000000e+01, best bound 2.300000000000e+01, gap 0.0%