Gurobi 5.0.1 (linux64) logging started Tue Nov 20 06:08:02 2012 Optimize a model with 840 rows, 130 columns and 1680 nonzeros Presolve removed 326 rows and 0 columns Presolve time: 0.01s Presolved: 514 rows, 130 columns, 1335 nonzeros Variable types: 0 continuous, 130 integer (130 binary) Found heuristic solution: objective 29.0000000 Root relaxation: objective 4.337085e+01, 359 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 43.37085 0 130 29.00000 43.37085 49.6% - 0s H 0 0 31.0000000 43.37085 39.9% - 0s 0 0 43.14951 0 130 31.00000 43.14951 39.2% - 0s 0 0 42.94211 0 127 31.00000 42.94211 38.5% - 0s 0 0 42.80010 0 127 31.00000 42.80010 38.1% - 0s 0 0 42.66527 0 130 31.00000 42.66527 37.6% - 0s H 0 0 32.0000000 42.66527 33.3% - 0s 0 0 42.61535 0 130 32.00000 42.61535 33.2% - 0s 0 0 42.56270 0 130 32.00000 42.56270 33.0% - 0s 0 0 42.52755 0 129 32.00000 42.52755 32.9% - 0s 0 0 42.49089 0 129 32.00000 42.49089 32.8% - 0s 0 0 42.46883 0 129 32.00000 42.46883 32.7% - 0s 0 0 42.37296 0 129 32.00000 42.37296 32.4% - 0s 0 0 42.27901 0 129 32.00000 42.27901 32.1% - 0s 0 0 42.20745 0 130 32.00000 42.20745 31.9% - 0s 0 0 42.15323 0 129 32.00000 42.15323 31.7% - 0s 0 0 42.08688 0 129 32.00000 42.08688 31.5% - 0s H 0 0 35.0000000 42.08688 20.2% - 0s 0 0 42.01603 0 129 35.00000 42.01603 20.0% - 0s 0 0 41.96686 0 129 35.00000 41.96686 19.9% - 0s 0 0 41.89124 0 130 35.00000 41.89124 19.7% - 0s 0 0 41.84361 0 130 35.00000 41.84361 19.6% - 0s 0 0 41.83982 0 130 35.00000 41.83982 19.5% - 0s 0 0 41.83982 0 129 35.00000 41.83982 19.5% - 0s 0 2 41.83803 0 129 35.00000 41.83803 19.5% - 0s Explored 2756 nodes (82965 simplex iterations) in 3.99 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.500000000000e+01, best bound 3.500000000000e+01, gap 0.0%