Gurobi 5.0.1 (linux64) logging started Wed Apr 24 15:50:12 2013 Optimize a model with 3410 rows, 961310 columns and 1922310 nonzeros Presolve removed 0 rows and 0 columns (presolve time = 8s) ... Presolve time: 8.78s Presolved: 3410 rows, 961310 columns, 1922310 nonzeros Variable types: 961000 continuous, 310 integer (310 binary) Starting sifting (using dual simplex for sub-problems)... Iter Pivots Primal Obj Dual Obj Time 0 0 infinity 5.4713000e+04 0s 1 14875 1.7081000e+10 8.3806947e+04 0s 2 25189 7.5816543e+07 8.5520053e+04 1s 3 33072 1.7342967e+06 9.0560610e+04 1s 4 43799 1.3818332e+06 1.2633563e+05 1s 5 56730 1.2095744e+06 2.1524703e+05 1s 6 70418 1.1245628e+06 3.7168209e+05 2s 7 83591 1.0971717e+06 5.4756952e+05 2s 8 96720 1.0794624e+06 9.0759681e+05 2s 9 109460 1.0780344e+06 9.9075839e+05 3s 10 119506 1.0774725e+06 1.0225219e+06 3s 11 128208 1.0738796e+06 1.0405484e+06 3s 12 138340 1.0705403e+06 1.0602382e+06 4s 13 144291 1.0700569e+06 1.0621158e+06 4s 14 149975 1.0698789e+06 1.0627633e+06 4s Sifting complete Root relaxation: objective 1.069177e+06, 155313 iterations, 4.36 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 1069176.99 0 3 - 1069176.99 - - 14s H 0 0 1115811.0000 1069176.99 4.18% - 17s 0 0 1069291.16 0 3 1115811.00 1069291.16 4.17% - 21s H 0 0 1070513.0000 1069291.16 0.11% - 22s 0 0 1069326.71 0 3 1070513.00 1069326.71 0.11% - 24s 0 0 1069326.71 0 3 1070513.00 1069326.71 0.11% - 31s 0 0 1069326.71 0 3 1070513.00 1069326.71 0.11% - 32s 0 0 1069326.71 0 3 1070513.00 1069326.71 0.11% - 33s 0 0 1069333.62 0 3 1070513.00 1069333.62 0.11% - 34s 0 0 1069341.38 0 2 1070513.00 1069341.38 0.11% - 35s 0 0 1069341.38 0 2 1070513.00 1069341.38 0.11% - 35s 0 0 1069341.38 0 2 1070513.00 1069341.38 0.11% - 36s 0 0 1069343.14 0 2 1070513.00 1069343.14 0.11% - 37s 0 0 1069343.14 0 2 1070513.00 1069343.14 0.11% - 38s 0 0 1069343.14 0 2 1070513.00 1069343.14 0.11% - 39s 0 0 1069343.90 0 2 1070513.00 1069343.90 0.11% - 40s 0 0 1069343.90 0 2 1070513.00 1069343.90 0.11% - 41s 0 0 1069343.90 0 2 1070513.00 1069343.90 0.11% - 41s 0 2 1069350.75 0 2 1070513.00 1069350.75 0.11% - 44s 1 4 1069408.41 1 1 1070513.00 1069408.41 0.10% 216 45s * 12 4 12 1069495.0000 1069453.22 0.00% 44.6 48s Cutting planes: Implied bound: 62 Flow cover: 2 Explored 13 nodes (170941 simplex iterations) in 48.91 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.069495000000e+06, best bound 1.069453220312e+06, gap 0.0039%