Gurobi 5.0.1 (linux64) logging started Tue Nov 20 15:55:45 2012 Optimize a model with 267 rows, 227 columns and 534 nonzeros Presolve removed 205 rows and 175 columns Presolve time: 0.00s Presolved: 62 rows, 52 columns, 124 nonzeros Variable types: 0 continuous, 52 integer (52 binary) Found heuristic solution: objective 124.0000000 Root relaxation: objective 1.290000e+02, 64 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 129.00000 0 52 124.00000 129.00000 4.03% - 0s H 0 0 125.0000000 129.00000 3.20% - 0s H 0 0 127.0000000 129.00000 1.57% - 0s 0 0 128.00000 0 46 127.00000 128.00000 0.79% - 0s 0 0 infeasible 0 127.00000 127.99987 0.79% - 0s Cutting planes: Zero half: 8 Explored 0 nodes (117 simplex iterations) in 0.01 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.270000000000e+02, best bound 1.270000000000e+02, gap 0.0%