Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:54:56 2012 Optimize a model with 735 rows, 120 columns and 1470 nonzeros Presolve removed 283 rows and 0 columns Presolve time: 0.00s Presolved: 452 rows, 120 columns, 1183 nonzeros Variable types: 0 continuous, 120 integer (120 binary) Found heuristic solution: objective 27.0000000 Root relaxation: objective 4.050000e+01, 255 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 40.50000 0 79 27.00000 40.50000 50.0% - 0s H 0 0 30.0000000 40.50000 35.0% - 0s 0 0 39.79348 0 113 30.00000 39.79348 32.6% - 0s 0 0 39.30563 0 118 30.00000 39.30563 31.0% - 0s 0 0 39.06215 0 112 30.00000 39.06215 30.2% - 0s 0 0 38.96632 0 113 30.00000 38.96632 29.9% - 0s H 0 0 31.0000000 38.96632 25.7% - 0s 0 0 38.92624 0 113 31.00000 38.92624 25.6% - 0s H 0 0 32.0000000 38.92624 21.6% - 0s 0 0 38.90201 0 112 32.00000 38.90201 21.6% - 0s 0 0 38.86019 0 113 32.00000 38.86019 21.4% - 0s 0 0 38.84327 0 114 32.00000 38.84327 21.4% - 0s 0 0 38.79657 0 115 32.00000 38.79657 21.2% - 0s 0 0 38.77203 0 115 32.00000 38.77203 21.2% - 0s 0 0 38.76726 0 115 32.00000 38.76726 21.1% - 0s 0 0 38.76482 0 114 32.00000 38.76482 21.1% - 0s 0 0 38.76156 0 115 32.00000 38.76156 21.1% - 0s 0 0 38.76156 0 115 32.00000 38.76156 21.1% - 0s H 0 0 33.0000000 38.76156 17.5% - 0s 0 2 38.75911 0 115 33.00000 38.75911 17.5% - 0s Cutting planes: Gomory: 1 Clique: 3 Zero half: 60 Explored 603 nodes (19211 simplex iterations) in 0.74 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.300000000000e+01, best bound 3.300000000000e+01, gap 0.0%