Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:03:39 2012 Optimize a model with 457 rows, 428 columns and 1568 nonzeros Presolve removed 0 rows and 22 columns Presolve time: 0.00s Presolved: 457 rows, 406 columns, 1546 nonzeros Variable types: 0 continuous, 406 integer (405 binary) Found heuristic solution: objective 90.0000000 Root relaxation: objective 0.000000e+00, 255 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 0 175 90.00000 0.00000 100% - 0s H 0 0 73.0000000 0.00000 100% - 0s H 0 0 72.0000000 0.00000 100% - 0s H 0 0 65.0000000 0.00000 100% - 0s 0 0 0.28626 0 177 65.00000 0.28626 100% - 0s H 0 0 61.0000000 0.28626 100% - 0s 0 0 0.77647 0 179 61.00000 0.77647 98.7% - 0s H 0 0 52.0000000 0.77647 98.5% - 0s H 0 0 50.0000000 0.77647 98.4% - 0s 0 0 0.77662 0 179 50.00000 0.77662 98.4% - 0s 0 0 0.77662 0 179 50.00000 0.77662 98.4% - 0s H 0 0 32.0000000 0.77662 97.6% - 0s H 0 0 30.0000000 0.77662 97.4% - 0s 0 2 0.77814 0 179 30.00000 0.77814 97.4% - 0s H 27 27 27.0000000 1.00000 96.3% 25.6 0s H 51 41 17.0000000 1.00000 94.1% 20.1 0s * 528 222 24 16.0000000 2.40000 85.0% 29.2 0s H 606 225 15.0000000 4.00000 73.3% 29.6 0s Explored 3985 nodes (103652 simplex iterations) in 4.54 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%