current bounds on the number of colors: 0 -- 88 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:33 2012 Optimize a model with 1672 rows, 3908 columns and 8624 nonzeros Presolve removed 41 rows and 1804 columns Presolve time: 0.02s Presolved: 1631 rows, 2104 columns, 6820 nonzeros Variable types: 0 continuous, 2104 integer (2104 binary) Root relaxation: objective 0.000000e+00, 78 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 (78 simplex iterations) in 0.02 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 -- 44 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:33 2012 Optimize a model with 880 rows, 1972 columns and 4312 nonzeros Presolve removed 41 rows and 902 columns Presolve time: 0.01s Presolved: 839 rows, 1070 columns, 3410 nonzeros Variable types: 0 continuous, 1070 integer (1070 binary) Root relaxation: objective 0.000000e+00, 78 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 (78 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 -- 22 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:33 2012 Optimize a model with 484 rows, 1004 columns and 2156 nonzeros Presolve removed 41 rows and 451 columns Presolve time: 0.00s Presolved: 443 rows, 553 columns, 1705 nonzeros Variable types: 0 continuous, 553 integer (553 binary) Root relaxation: objective 0.000000e+00, 78 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 (78 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 Sat Dec 15 16:14:33 2012 Optimize a model with 268 rows, 476 columns and 980 nonzeros Presolve removed 41 rows and 205 columns Presolve time: 0.00s Presolved: 227 rows, 271 columns, 775 nonzeros Variable types: 0 continuous, 271 integer (271 binary) Root relaxation: objective 0.000000e+00, 71 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 (71 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 16:14:33 2012 Optimize a model with 160 rows, 212 columns and 392 nonzeros Presolve removed 94 rows and 138 columns Presolve time: 0.00s Presolved: 66 rows, 74 columns, 198 nonzeros Variable types: 0 continuous, 74 integer (74 binary) Root relaxation: objective 0.000000e+00, 27 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 (27 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 16:14:33 2012 Optimize a model with 124 rows, 124 columns and 196 nonzeros Presolve removed 124 rows and 124 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