current bounds on the number of colors: 0 -- 23 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:21 2012 Optimize a model with 199 rows, 269 columns and 781 nonzeros Presolve removed 4 rows and 44 columns Presolve time: 0.00s Presolved: 195 rows, 225 columns, 737 nonzeros Variable types: 0 continuous, 225 integer (225 binary) Root relaxation: objective 0.000000e+00, 31 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 (31 simplex iterations) in 0.00 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 Fri Dec 14 18:19:21 2012 Optimize a model with 103 rows, 131 columns and 355 nonzeros Presolve removed 4 rows and 20 columns Presolve time: 0.00s Presolved: 99 rows, 111 columns, 335 nonzeros Variable types: 0 continuous, 111 integer (111 binary) Root relaxation: objective 0.000000e+00, 33 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 (33 simplex iterations) in 0.00 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:21 2012 Optimize a model with 55 rows, 62 columns and 142 nonzeros Presolve removed 27 rows and 33 columns Presolve time: 0.00s Presolved: 28 rows, 29 columns, 84 nonzeros Variable types: 0 continuous, 29 integer (29 binary) Root relaxation: objective 0.000000e+00, 14 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 (14 simplex iterations) in 0.00 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 -- 2 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:21 2012 Optimize a model with 39 rows, 39 columns and 71 nonzeros Presolve removed 39 rows and 39 columns Presolve time: 0.00s Explored 0 nodes (0 simplex iterations) in 0.00 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 2