current bounds on the number of colors: 0 -- 14 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:35:33 2012 Optimize a model with 119 rows, 113 columns and 413 nonzeros Presolve removed 1 rows and 7 columns Presolve time: 0.00s Presolved: 118 rows, 106 columns, 406 nonzeros Variable types: 0 continuous, 106 integer (106 binary) Root relaxation: objective 0.000000e+00, 25 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 (25 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 -- 7 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:35:33 2012 Optimize a model with 59 rows, 57 columns and 177 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 58 rows, 54 columns, 174 nonzeros Variable types: 0 continuous, 54 integer (54 binary) Root relaxation: objective 0.000000e+00, 24 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 (24 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 -- 3 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:35:33 2012 Optimize a model with 29 rows, 29 columns and 59 nonzeros Presolve removed 29 rows and 29 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 - current bounds on the number of colors: 1 -- 3 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:35:33 2012 Optimize a model with 44 rows, 43 columns and 118 nonzeros Presolve removed 16 rows and 18 columns Presolve time: 0.00s Presolved: 28 rows, 25 columns, 84 nonzeros Variable types: 0 continuous, 25 integer (25 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 0.00000 0 11 - 0.00000 - - 0s Explored 0 nodes (41 simplex iterations) in 0.00 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - optimal solution found: number of colors: 3