current bounds on the number of colors: 0 -- 181 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:25:25 2012 Optimize a model with 15841 rows, 16464 columns and 63270 nonzeros Presolve removed 27 rows and 2430 columns Presolve time: 0.12s Presolved: 15814 rows, 14034 columns, 60840 nonzeros Variable types: 0 continuous, 14034 integer (14034 binary) Root relaxation: objective 0.000000e+00, 281 iterations, 0.01 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 (281 simplex iterations) in 0.13 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 -- 90 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:25:26 2012 Optimize a model with 8011 rows, 8319 columns and 31635 nonzeros Presolve removed 27 rows and 1215 columns Presolve time: 0.07s Presolved: 7984 rows, 7104 columns, 30420 nonzeros Variable types: 0 continuous, 7104 integer (7104 binary) Root relaxation: objective 0.000000e+00, 281 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 (281 simplex iterations) in 0.08 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 -- 45 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:25:26 2012 Optimize a model with 4009 rows, 4156 columns and 15466 nonzeros Presolve removed 27 rows and 594 columns Presolve time: 0.02s Presolved: 3982 rows, 3562 columns, 14872 nonzeros Variable types: 0 continuous, 3562 integer (3562 binary) Root relaxation: objective 0.000000e+00, 283 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 (283 simplex iterations) in 0.03 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 16:25:26 2012 Optimize a model with 2095 rows, 2165 columns and 7733 nonzeros Presolve removed 27 rows and 297 columns Presolve time: 0.01s Presolved: 2068 rows, 1868 columns, 7436 nonzeros Variable types: 0 continuous, 1868 integer (1868 binary) Root relaxation: objective 0.000000e+00, 275 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 (275 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 -- 11 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:25:26 2012 Optimize a model with 1051 rows, 1079 columns and 3515 nonzeros Presolve removed 27 rows and 135 columns Presolve time: 0.00s Presolved: 1024 rows, 944 columns, 3380 nonzeros Variable types: 0 continuous, 944 integer (944 binary) Root relaxation: objective 0.000000e+00, 250 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 (250 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 -- 5 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:25:26 2012 Optimize a model with 529 rows, 536 columns and 1406 nonzeros Presolve removed 191 rows and 223 columns Presolve time: 0.00s Presolved: 338 rows, 313 columns, 1014 nonzeros Variable types: 0 continuous, 313 integer (313 binary) Root relaxation: objective 0.000000e+00, 157 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 0 137 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (535 simplex iterations) in 0.01 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - current bounds on the number of colors: 2 -- 5 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:25:26 2012 Optimize a model with 703 rows, 717 columns and 2109 nonzeros Presolve removed 27 rows and 81 columns Presolve time: 0.00s Presolved: 676 rows, 636 columns, 2028 nonzeros Variable types: 0 continuous, 636 integer (636 binary) Root relaxation: objective 0.000000e+00, 269 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 (269 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% optimal solution found: number of colors: 3