Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:03:34 2012 Optimize a model with 453 rows, 426 columns and 1556 nonzeros Presolve removed 0 rows and 19 columns Presolve time: 0.00s Presolved: 453 rows, 407 columns, 1537 nonzeros Variable types: 0 continuous, 407 integer (406 binary) Found heuristic solution: objective 83.0000000 Root relaxation: objective 0.000000e+00, 222 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 173 83.00000 0.00000 100% - 0s H 0 0 70.0000000 0.00000 100% - 0s H 0 0 62.0000000 0.00000 100% - 0s H 0 0 59.0000000 0.00000 100% - 0s 0 0 0.35717 0 175 59.00000 0.35717 99.4% - 0s H 0 0 55.0000000 0.35717 99.4% - 0s 0 0 0.85800 0 179 55.00000 0.85800 98.4% - 0s H 0 0 53.0000000 0.85800 98.4% - 0s 0 0 0.85800 0 179 53.00000 0.85800 98.4% - 0s H 0 0 51.0000000 0.85800 98.3% - 0s H 0 0 48.0000000 0.85800 98.2% - 0s H 0 0 47.0000000 0.85800 98.2% - 0s H 0 0 46.0000000 0.85800 98.1% - 0s 0 2 0.90068 0 179 46.00000 0.90068 98.0% - 0s H 27 27 35.0000000 1.00000 97.1% 44.3 0s * 38 38 21 17.0000000 1.00000 94.1% 38.2 0s * 91 65 24 16.0000000 1.22014 92.4% 39.6 0s * 547 184 16 15.0000000 6.38182 57.5% 31.0 0s Cutting planes: Gomory: 3 Zero half: 4 Explored 1485 nodes (44259 simplex iterations) in 1.88 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.500000000000e+01, best bound 1.500000000000e+01, gap 0.0%