Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:24:43 2012 Optimize a model with 483 rows, 457 columns and 1662 nonzeros Presolve removed 0 rows and 18 columns Presolve time: 0.00s Presolved: 483 rows, 439 columns, 1644 nonzeros Variable types: 0 continuous, 439 integer (438 binary) Found heuristic solution: objective 90.0000000 Root relaxation: objective 0.000000e+00, 251 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 0 193 90.00000 0.00000 100% - 0s H 0 0 69.0000000 0.00000 100% - 0s H 0 0 68.0000000 0.00000 100% - 0s H 0 0 64.0000000 0.00000 100% - 0s 0 0 0.29412 0 195 64.00000 0.29412 100% - 0s H 0 0 52.0000000 0.29412 99.4% - 0s H 0 0 50.0000000 0.29412 99.4% - 0s 0 0 0.76699 0 197 50.00000 0.76699 98.5% - 0s H 0 0 46.0000000 0.76699 98.3% - 0s 0 0 0.76963 0 199 46.00000 0.76963 98.3% - 0s 0 0 0.76963 0 199 46.00000 0.76963 98.3% - 0s H 0 0 45.0000000 0.76963 98.3% - 0s 0 2 0.77886 0 199 45.00000 0.77886 98.3% - 0s H 27 27 39.0000000 1.00000 97.4% 46.6 0s H 54 52 20.0000000 1.00000 95.0% 34.9 0s H 54 33 17.0000000 1.00000 94.1% 34.9 0s * 101 51 18 16.0000000 1.00000 93.8% 36.5 0s H 190 102 15.0000000 1.00000 93.3% 39.9 0s Cutting planes: Gomory: 3 Zero half: 2 Mod-K: 1 Explored 1622 nodes (51699 simplex iterations) in 2.27 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%