Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:42:00 2012 Optimize a model with 501 rows, 470 columns and 1720 nonzeros Presolve removed 0 rows and 17 columns Presolve time: 0.00s Presolved: 501 rows, 453 columns, 1703 nonzeros Variable types: 0 continuous, 453 integer (452 binary) Found heuristic solution: objective 90.0000000 Root relaxation: objective 0.000000e+00, 240 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 0 191 90.00000 0.00000 100% - 0s H 0 0 64.0000000 0.00000 100% - 0s H 0 0 63.0000000 0.00000 100% - 0s H 0 0 55.0000000 0.00000 100% - 0s 0 0 0.40939 0 193 55.00000 0.40939 99.3% - 0s H 0 0 53.0000000 0.40939 99.2% - 0s 0 0 0.66667 0 195 53.00000 0.66667 98.7% - 0s H 0 0 50.0000000 0.66667 98.7% - 0s 0 0 0.66667 0 199 50.00000 0.66667 98.7% - 0s 0 0 0.66667 0 198 50.00000 0.66667 98.7% - 0s H 0 0 33.0000000 0.66667 98.0% - 0s H 0 0 28.0000000 0.66667 97.6% - 0s 0 2 0.66667 0 196 28.00000 0.66667 97.6% - 0s * 57 53 34 17.0000000 1.00000 94.1% 26.5 0s * 65 29 41 15.0000000 1.00000 93.3% 23.5 0s * 421 102 18 14.0000000 7.02128 49.8% 32.3 0s Cutting planes: Gomory: 3 Zero half: 1 Mod-K: 1 Explored 782 nodes (25815 simplex iterations) in 1.04 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.400000000000e+01, best bound 1.400000000000e+01, gap 0.0%