Gurobi 5.0.1 (linux64) logging started Wed Apr 24 04:14:31 2013 Optimize a model with 69886 rows, 69056 columns and 275726 nonzeros Presolve removed 83 rows and 0 columns Presolve time: 0.33s Presolved: 69803 rows, 69056 columns, 275643 nonzeros Variable types: 68973 continuous, 83 integer (83 binary) Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 6905 6.5079486e+04 7.640432e+03 0.000000e+00 5s 7437 6.5116806e+04 0.000000e+00 0.000000e+00 6s Root relaxation: objective 6.511681e+04, 7437 iterations, 6.30 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 65116.8058 0 57 - 65116.8058 - - 6s H 0 0 98459.000000 65116.8058 33.9% - 10s H 0 0 87341.000000 65116.8058 25.4% - 31s 0 0 78990.7475 0 18 87341.0000 78990.7475 9.56% - 42s 0 0 83104.6080 0 15 87341.0000 83104.6080 4.85% - 47s 0 0 83692.0068 0 8 87341.0000 83692.0068 4.18% - 49s H 0 0 84361.000000 83692.0068 0.79% - 49s 0 0 83794.3103 0 6 84361.0000 83794.3103 0.67% - 50s 0 0 83796.2010 0 6 84361.0000 83796.2010 0.67% - 51s 0 0 83813.6241 0 5 84361.0000 83813.6241 0.65% - 51s 0 2 83813.9392 0 5 84361.0000 83813.9392 0.65% - 53s 6 6 cutoff 4 84361.0000 83890.3904 0.56% 323 55s * 12 5 9 84352.000000 83890.3904 0.55% 279 56s * 23 5 7 84206.000000 83935.8862 0.32% 255 57s 39 7 84176.4016 5 1 84206.0000 84079.4183 0.15% 235 60s * 40 5 6 84199.000000 84079.4183 0.14% 233 60s Cutting planes: Implied bound: 81 Explored 56 nodes (29701 simplex iterations) in 61.30 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.419900000000e+04, best bound 8.419900000000e+04, gap 0.0%