current bounds on the number of colors: 0 -- 65 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:42 2012 Optimize a model with 897 rows, 2106 columns and 4576 nonzeros Presolve removed 28 rows and 896 columns Presolve time: 0.01s Presolved: 869 rows, 1210 columns, 3680 nonzeros Variable types: 0 continuous, 1210 integer (1210 binary) Root relaxation: objective 0.000000e+00, 58 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 (58 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 -- 32 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:42 2012 Optimize a model with 481 rows, 1066 columns and 2288 nonzeros Presolve removed 28 rows and 448 columns Presolve time: 0.00s Presolved: 453 rows, 618 columns, 1840 nonzeros Variable types: 0 continuous, 618 integer (618 binary) Root relaxation: objective 0.000000e+00, 58 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 (58 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 -- 16 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:42 2012 Optimize a model with 273 rows, 546 columns and 1144 nonzeros Presolve removed 28 rows and 224 columns Presolve time: 0.00s Presolved: 245 rows, 322 columns, 920 nonzeros Variable types: 0 continuous, 322 integer (322 binary) Root relaxation: objective 0.000000e+00, 57 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 (57 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 Sat Dec 15 16:13:42 2012 Optimize a model with 169 rows, 286 columns and 572 nonzeros Presolve removed 28 rows and 112 columns Presolve time: 0.00s Presolved: 141 rows, 174 columns, 460 nonzeros Variable types: 0 continuous, 174 integer (174 binary) Root relaxation: objective 0.000000e+00, 48 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 (48 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 Sat Dec 15 16:13:42 2012 Optimize a model with 117 rows, 156 columns and 286 nonzeros Presolve removed 77 rows and 111 columns Presolve time: 0.00s Presolved: 40 rows, 45 columns, 120 nonzeros Variable types: 0 continuous, 45 integer (45 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 Sat Dec 15 16:13:42 2012 Optimize a model with 91 rows, 91 columns and 143 nonzeros Presolve removed 91 rows and 91 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