current bounds on the number of colors: 0 -- 17 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:17 2012 Optimize a model with 73 rows, 143 columns and 304 nonzeros Presolve removed 6 rows and 48 columns Presolve time: 0.00s Presolved: 67 rows, 95 columns, 256 nonzeros Variable types: 0 continuous, 95 integer (95 binary) Root relaxation: objective 0.000000e+00, 16 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 (16 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 -- 8 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:17 2012 Optimize a model with 45 rows, 75 columns and 152 nonzeros Presolve removed 6 rows and 24 columns Presolve time: 0.00s Presolved: 39 rows, 51 columns, 128 nonzeros Variable types: 0 continuous, 51 integer (51 binary) Root relaxation: objective 0.000000e+00, 17 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 (17 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:17 2012 Optimize a model with 31 rows, 41 columns and 76 nonzeros Presolve removed 21 rows and 29 columns Presolve time: 0.00s Presolved: 10 rows, 12 columns, 30 nonzeros Variable types: 0 continuous, 12 integer (12 binary) Root relaxation: objective 0.000000e+00, 5 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 (5 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 18:19:17 2012 Optimize a model with 24 rows, 24 columns and 38 nonzeros Presolve removed 24 rows and 24 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