Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:08:02 2013 Optimize a model with 748 rows, 46308 columns and 92548 nonzeros Presolve time: 0.07s Presolved: 748 rows, 46308 columns, 92548 nonzeros Variable types: 46240 continuous, 68 integer (68 binary) Root relaxation: objective 7.785514e+04, 1865 iterations, 0.05 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 77855.1416 0 14 - 77855.1416 - - 0s H 0 0 88712.000000 77855.1416 12.2% - 0s 0 0 78190.9301 0 7 88712.0000 78190.9301 11.9% - 0s H 0 0 85864.000000 78190.9301 8.94% - 0s 0 0 78256.5956 0 8 85864.0000 78256.5956 8.86% - 0s H 0 0 84899.299422 78256.5956 7.82% - 0s H 0 0 82803.000000 78256.5956 5.49% - 0s 0 0 78270.2436 0 5 82803.0000 78270.2436 5.47% - 0s H 0 0 81711.000000 78270.2436 4.21% - 0s 0 0 78273.7038 0 6 81711.0000 78273.7038 4.21% - 0s 0 0 78274.6452 0 5 81711.0000 78274.6452 4.21% - 0s 0 0 78275.2572 0 6 81711.0000 78275.2572 4.20% - 0s 0 0 78275.7125 0 5 81711.0000 78275.7125 4.20% - 0s 0 0 78276.0982 0 4 81711.0000 78276.0982 4.20% - 1s 0 0 78276.6926 0 5 81711.0000 78276.6926 4.20% - 1s 0 2 78281.8572 0 5 81711.0000 78281.8572 4.20% - 1s H 1 1 81670.992949 78281.8572 4.15% 0.0 1s H 4 4 80114.751196 78345.8344 2.21% 54.2 1s H 6 6 79583.272727 78345.8344 1.55% 45.5 1s H 9 9 78917.000000 78345.8344 0.72% 49.9 1s H 11 9 78889.450000 78345.8344 0.69% 48.8 1s * 16 11 14 78820.000000 78345.8344 0.60% 47.6 1s H 54 15 78601.000000 78368.2823 0.30% 50.3 2s H 84 26 78597.000000 78425.1032 0.22% 50.6 2s * 86 21 12 78560.000000 78425.1032 0.17% 50.4 2s Cutting planes: Implied bound: 175 Flow cover: 11 Explored 128 nodes (8272 simplex iterations) in 3.34 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.856000000000e+04, best bound 7.855589473684e+04, gap 0.0052%