Gurobi 5.0.1 (linux64) logging started Wed Apr 24 03:23:22 2013 Optimize a model with 61776 rows, 60996 columns and 243516 nonzeros Presolve removed 78 rows and 0 columns Presolve time: 0.28s Presolved: 61698 rows, 60996 columns, 243438 nonzeros Variable types: 60918 continuous, 78 integer (78 binary) Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 7691 6.7032203e+04 3.222755e+02 0.000000e+00 5s 7857 6.7038257e+04 0.000000e+00 0.000000e+00 5s Root relaxation: objective 6.703826e+04, 7857 iterations, 5.45 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 67038.2567 0 61 - 67038.2567 - - 6s H 0 0 103201.00000 67038.2567 35.0% - 9s H 0 0 93811.000000 67038.2567 28.5% - 38s H 0 0 93336.000000 67038.2567 28.2% - 49s 0 0 83453.0514 0 25 93336.0000 83453.0514 10.6% - 61s 0 0 88259.6668 0 6 93336.0000 88259.6668 5.44% - 65s 0 0 89195.7115 0 4 93336.0000 89195.7115 4.44% - 66s H 0 0 93056.607215 89195.7115 4.15% - 66s H 0 0 92494.000000 89195.7115 3.57% - 66s 0 2 89195.9659 0 4 92494.0000 89195.9659 3.57% - 67s H 2 2 91073.647692 89221.4286 2.03% 98.5 68s H 3 3 90953.565217 89264.2541 1.86% 169 68s H 5 5 89929.850000 89280.1249 0.72% 165 68s H 14 7 89715.375000 89280.1249 0.49% 100 69s H 15 3 89366.000000 89280.1249 0.10% 103 69s 18 4 89311.7647 18 1 89366.0000 89280.1249 0.10% 104 70s * 30 0 18 89344.000000 89344.0000 0.0% 119 71s Cutting planes: Implied bound: 77 Explored 31 nodes (21233 simplex iterations) in 71.24 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.934400000000e+04, best bound 8.934400000000e+04, gap 0.0%