Gurobi 5.0.1 (linux64) logging started Sun Nov 18 08:26:54 2012 Optimize a model with 545 rows, 509 columns and 1869 nonzeros Presolve removed 0 rows and 17 columns Presolve time: 0.00s Presolved: 545 rows, 492 columns, 1852 nonzeros Variable types: 0 continuous, 492 integer (491 binary) Found heuristic solution: objective 104.0000000 Root relaxation: objective 0.000000e+00, 299 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 0 214 104.00000 0.00000 100% - 0s H 0 0 87.0000000 0.00000 100% - 0s H 0 0 70.0000000 0.00000 100% - 0s 0 0 0.43733 0 215 70.00000 0.43733 99.4% - 0s H 0 0 64.0000000 0.43733 99.3% - 0s H 0 0 61.0000000 0.43733 99.3% - 0s 0 0 1.00000 0 216 61.00000 1.00000 98.4% - 0s H 0 0 57.0000000 1.00000 98.2% - 0s 0 0 1.16968 0 216 57.00000 1.16968 97.9% - 0s H 0 0 46.0000000 1.16968 97.5% - 0s 0 0 1.23109 0 217 46.00000 1.23109 97.3% - 0s H 0 0 36.0000000 1.23109 96.6% - 0s 0 0 1.26284 0 221 36.00000 1.26284 96.5% - 0s H 0 0 35.0000000 1.26284 96.4% - 0s 0 0 1.26558 0 218 35.00000 1.26558 96.4% - 0s H 0 0 34.0000000 1.26558 96.3% - 0s 0 0 1.26588 0 221 34.00000 1.26588 96.3% - 0s 0 0 1.26588 0 221 34.00000 1.26588 96.3% - 0s 0 2 1.26618 0 221 34.00000 1.26618 96.3% - 0s H 27 27 33.0000000 1.29555 96.1% 57.6 0s H 54 54 31.0000000 1.29555 95.8% 40.9 0s H 91 50 20.0000000 1.29555 93.5% 31.0 0s * 155 84 32 19.0000000 1.44646 92.4% 32.0 0s * 231 87 35 17.0000000 1.45351 91.4% 30.3 0s Cutting planes: Gomory: 8 Mod-K: 1 Explored 1407 nodes (44087 simplex iterations) in 3.22 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.700000000000e+01, best bound 1.700000000000e+01, gap 0.0%