current bounds on the number of colors: 0 -- 23 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:56:05 2012 Optimize a model with 1497 rows, 387 columns and 4675 nonzeros Presolve time: 0.00s Presolved: 1497 rows, 387 columns, 4675 nonzeros Variable types: 0 continuous, 387 integer (387 binary) Root relaxation: objective 0.000000e+00, 56 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (115 simplex iterations) in 0.01 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:56:05 2012 Optimize a model with 693 rows, 249 columns and 2125 nonzeros Presolve time: 0.00s Presolved: 693 rows, 249 columns, 2125 nonzeros Variable types: 0 continuous, 249 integer (249 binary) Root relaxation: objective 0.000000e+00, 46 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 26 - 0.00000 - - 0s 0 0 0.00000 0 22 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (756 simplex iterations) in 0.03 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - current bounds on the number of colors: 5 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:56:05 2012 Optimize a model with 1095 rows, 318 columns and 3400 nonzeros Presolve time: 0.00s Presolved: 1095 rows, 318 columns, 3400 nonzeros Variable types: 0 continuous, 318 integer (318 binary) Root relaxation: objective 0.000000e+00, 52 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (97 simplex iterations) in 0.01 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 5 -- 8 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:56:05 2012 Optimize a model with 827 rows, 272 columns and 2550 nonzeros Presolve time: 0.00s Presolved: 827 rows, 272 columns, 2550 nonzeros Variable types: 0 continuous, 272 integer (272 binary) Root relaxation: objective 0.000000e+00, 46 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 24 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (327 simplex iterations) in 0.01 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% optimal solution found: number of colors: 6