Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:04 2012 Optimize a model with 202 rows, 85 columns and 404 nonzeros Presolve removed 44 rows and 8 columns Presolve time: 0.00s Presolved: 158 rows, 77 columns, 329 nonzeros Variable types: 0 continuous, 77 integer (77 binary) Found heuristic solution: objective 30.0000000 Root relaxation: objective 3.900000e+01, 106 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 39.00000 0 70 30.00000 39.00000 30.0% - 0s H 0 0 31.0000000 39.00000 25.8% - 0s 0 0 38.25000 0 76 31.00000 38.25000 23.4% - 0s H 0 0 32.0000000 38.25000 19.5% - 0s H 0 0 33.0000000 38.25000 15.9% - 0s 0 0 37.66667 0 73 33.00000 37.66667 14.1% - 0s 0 0 37.20000 0 71 33.00000 37.20000 12.7% - 0s H 0 0 34.0000000 37.20000 9.41% - 0s H 0 0 35.0000000 37.20000 6.29% - 0s 0 0 36.80952 0 76 35.00000 36.80952 5.17% - 0s 0 0 36.75000 0 75 35.00000 36.75000 5.00% - 0s 0 0 36.53939 0 76 35.00000 36.53939 4.40% - 0s 0 0 36.30000 0 76 35.00000 36.30000 3.71% - 0s 0 0 36.09091 0 76 35.00000 36.09091 3.12% - 0s 0 0 cutoff 0 35.00000 35.99996 2.86% - 0s Cutting planes: Gomory: 1 Zero half: 44 Explored 0 nodes (431 simplex iterations) in 0.03 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.500000000000e+01, best bound 3.500000000000e+01, gap 0.0%