current bounds on the number of colors: 0 -- 40 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:08 2012 Optimize a model with 200 rows, 808 columns and 1280 nonzeros Presolve removed 27 rows and 540 columns Presolve time: 0.00s Presolved: 173 rows, 268 columns, 740 nonzeros Variable types: 0 continuous, 268 integer (268 binary) Root relaxation: objective 0.000000e+00, 21 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 (21 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 -- 20 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:08 2012 Optimize a model with 120 rows, 408 columns and 640 nonzeros Presolve removed 27 rows and 270 columns Presolve time: 0.00s Presolved: 93 rows, 138 columns, 370 nonzeros Variable types: 0 continuous, 138 integer (138 binary) Root relaxation: objective 0.000000e+00, 21 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 (21 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 -- 10 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:08 2012 Optimize a model with 80 rows, 208 columns and 320 nonzeros Presolve removed 27 rows and 135 columns Presolve time: 0.00s Presolved: 53 rows, 73 columns, 185 nonzeros Variable types: 0 continuous, 73 integer (73 binary) Root relaxation: objective 0.000000e+00, 20 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 (20 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 Sat Dec 15 16:13:08 2012 Optimize a model with 56 rows, 88 columns and 128 nonzeros Presolve removed 46 rows and 76 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 Sat Dec 15 16:13:08 2012 Optimize a model with 48 rows, 48 columns and 64 nonzeros Presolve removed 48 rows and 48 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