Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:56:21 2012 Optimize a model with 509 rows, 478 columns and 1748 nonzeros Presolve removed 0 rows and 26 columns Presolve time: 0.00s Presolved: 509 rows, 452 columns, 1722 nonzeros Variable types: 0 continuous, 452 integer (451 binary) Found heuristic solution: objective 88.0000000 Root relaxation: objective 0.000000e+00, 258 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 88.00000 0.00000 100% - 0s H 0 0 73.0000000 0.00000 100% - 0s H 0 0 71.0000000 0.00000 100% - 0s H 0 0 67.0000000 0.00000 100% - 0s 0 0 0.37444 0 192 67.00000 0.37444 99.4% - 0s H 0 0 66.0000000 0.37444 99.4% - 0s 0 0 1.00000 0 194 66.00000 1.00000 98.5% - 0s H 0 0 61.0000000 1.00000 98.4% - 0s 0 0 1.00000 0 194 61.00000 1.00000 98.4% - 0s 0 0 1.00000 0 191 61.00000 1.00000 98.4% - 0s H 0 0 46.0000000 1.00000 97.8% - 0s H 0 0 45.0000000 1.00000 97.8% - 0s H 0 0 44.0000000 1.00000 97.7% - 0s H 0 0 39.0000000 1.00000 97.4% - 0s 0 2 1.00000 0 191 39.00000 1.00000 97.4% - 0s H 54 54 38.0000000 1.53315 96.0% 32.4 0s * 61 43 33 22.0000000 1.53315 93.0% 32.7 0s * 122 62 20 18.0000000 4.63830 74.2% 38.0 0s Cutting planes: Gomory: 3 Explored 1004 nodes (33945 simplex iterations) in 1.42 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.800000000000e+01, best bound 1.800000000000e+01, gap 0.0%