Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:51:43 2012 Optimize a model with 626 rows, 114 columns and 1252 nonzeros Presolve removed 227 rows and 0 columns Presolve time: 0.00s Presolved: 399 rows, 114 columns, 991 nonzeros Variable types: 0 continuous, 114 integer (114 binary) Found heuristic solution: objective 29.0000000 Root relaxation: objective 4.122727e+01, 285 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 41.22727 0 112 29.00000 41.22727 42.2% - 0s H 0 0 31.0000000 41.22727 33.0% - 0s 0 0 40.56048 0 112 31.00000 40.56048 30.8% - 0s H 0 0 32.0000000 40.56048 26.8% - 0s 0 0 40.25520 0 114 32.00000 40.25520 25.8% - 0s H 0 0 33.0000000 40.25520 22.0% - 0s 0 0 40.18274 0 113 33.00000 40.18274 21.8% - 0s 0 0 40.11709 0 114 33.00000 40.11709 21.6% - 0s 0 0 39.99662 0 111 33.00000 39.99662 21.2% - 0s 0 0 39.92715 0 114 33.00000 39.92715 21.0% - 0s 0 0 39.82394 0 112 33.00000 39.82394 20.7% - 0s 0 0 39.78668 0 111 33.00000 39.78668 20.6% - 0s 0 0 39.78417 0 113 33.00000 39.78417 20.6% - 0s 0 0 39.78417 0 112 33.00000 39.78417 20.6% - 0s 0 2 39.78016 0 112 33.00000 39.78016 20.5% - 0s H 27 12 34.0000000 39.62615 16.5% 33.5 0s Cutting planes: Gomory: 1 Clique: 2 Zero half: 44 Explored 553 nodes (15073 simplex iterations) in 0.58 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.400000000000e+01, best bound 3.400000000000e+01, gap 0.0%