Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:51:24 2012 Optimize a model with 605 rows, 113 columns and 1210 nonzeros Presolve removed 216 rows and 0 columns Presolve time: 0.00s Presolved: 389 rows, 113 columns, 962 nonzeros Variable types: 0 continuous, 113 integer (113 binary) Found heuristic solution: objective 28.0000000 Root relaxation: objective 4.011864e+01, 299 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 40.11864 0 112 28.00000 40.11864 43.3% - 0s 0 0 39.00000 0 108 28.00000 39.00000 39.3% - 0s 0 0 38.86572 0 112 28.00000 38.86572 38.8% - 0s 0 0 38.74378 0 112 28.00000 38.74378 38.4% - 0s H 0 0 29.0000000 38.74378 33.6% - 0s 0 0 38.62308 0 113 29.00000 38.62308 33.2% - 0s 0 0 38.37611 0 113 29.00000 38.37611 32.3% - 0s 0 0 38.27018 0 112 29.00000 38.27018 32.0% - 0s 0 0 38.23358 0 111 29.00000 38.23358 31.8% - 0s 0 0 38.16492 0 112 29.00000 38.16492 31.6% - 0s 0 0 38.10768 0 113 29.00000 38.10768 31.4% - 0s 0 0 38.09352 0 113 29.00000 38.09352 31.4% - 0s 0 0 38.09352 0 113 29.00000 38.09352 31.4% - 0s H 0 0 30.0000000 38.09352 27.0% - 0s 0 2 38.09158 0 113 30.00000 38.09158 27.0% - 0s H 9 9 33.0000000 38.07006 15.4% 52.6 0s Cutting planes: Clique: 1 Zero half: 73 Explored 455 nodes (13990 simplex iterations) in 0.53 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.300000000000e+01, best bound 3.300000000000e+01, gap 0.0%