current bounds on the number of colors: 0 -- 111 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:53 2012 Optimize a model with 3741 rows, 6171 columns and 16995 nonzeros Presolve removed 27 rows and 1485 columns Presolve time: 0.05s Presolved: 3714 rows, 4686 columns, 15510 nonzeros Variable types: 0 continuous, 4686 integer (4686 binary) Root relaxation: objective 0.000000e+00, 138 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 (138 simplex iterations) in 0.05 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 -- 55 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:53 2012 Optimize a model with 1893 rows, 3063 columns and 8343 nonzeros Presolve removed 27 rows and 729 columns Presolve time: 0.01s Presolved: 1866 rows, 2334 columns, 7614 nonzeros Variable types: 0 continuous, 2334 integer (2334 binary) Root relaxation: objective 0.000000e+00, 139 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 (139 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 -- 27 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:53 2012 Optimize a model with 969 rows, 1509 columns and 4017 nonzeros Presolve removed 27 rows and 351 columns Presolve time: 0.01s Presolved: 942 rows, 1158 columns, 3666 nonzeros Variable types: 0 continuous, 1158 integer (1158 binary) Root relaxation: objective 0.000000e+00, 136 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 (136 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 -- 13 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:53 2012 Optimize a model with 507 rows, 732 columns and 1854 nonzeros Presolve removed 27 rows and 162 columns Presolve time: 0.00s Presolved: 480 rows, 570 columns, 1692 nonzeros Variable types: 0 continuous, 570 integer (570 binary) Root relaxation: objective 0.000000e+00, 134 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 (134 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 -- 6 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:53 2012 Optimize a model with 309 rows, 399 columns and 927 nonzeros Presolve removed 27 rows and 81 columns Presolve time: 0.00s Presolved: 282 rows, 318 columns, 846 nonzeros Variable types: 0 continuous, 318 integer (318 binary) Root relaxation: objective 0.000000e+00, 121 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 (121 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 -- 3 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:53 2012 Optimize a model with 177 rows, 177 columns and 309 nonzeros Presolve removed 177 rows and 177 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 - current bounds on the number of colors: 1 -- 3 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:53 2012 Optimize a model with 243 rows, 288 columns and 618 nonzeros Presolve removed 135 rows and 174 columns Presolve time: 0.00s Presolved: 108 rows, 114 columns, 324 nonzeros Variable types: 0 continuous, 114 integer (114 binary) Root relaxation: objective 0.000000e+00, 47 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 (47 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: 2