current bounds on the number of colors: 0 -- 81 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:16 2012 Optimize a model with 1601 rows, 3278 columns and 7800 nonzeros Presolve removed 31 rows and 1240 columns Presolve time: 0.02s Presolved: 1570 rows, 2038 columns, 6560 nonzeros Variable types: 0 continuous, 2038 integer (2038 binary) Root relaxation: objective 0.000000e+00, 82 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 (82 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 -- 40 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:16 2012 Optimize a model with 841 rows, 1658 columns and 3900 nonzeros Presolve removed 31 rows and 620 columns Presolve time: 0.01s Presolved: 810 rows, 1038 columns, 3280 nonzeros Variable types: 0 continuous, 1038 integer (1038 binary) Root relaxation: objective 0.000000e+00, 82 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 (82 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 -- 20 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:16 2012 Optimize a model with 461 rows, 848 columns and 1950 nonzeros Presolve removed 31 rows and 310 columns Presolve time: 0.00s Presolved: 430 rows, 538 columns, 1640 nonzeros Variable types: 0 continuous, 538 integer (538 binary) Root relaxation: objective 0.000000e+00, 80 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 (80 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 16:14:16 2012 Optimize a model with 271 rows, 443 columns and 975 nonzeros Presolve removed 31 rows and 155 columns Presolve time: 0.00s Presolved: 240 rows, 288 columns, 820 nonzeros Variable types: 0 continuous, 288 integer (288 binary) Root relaxation: objective 0.000000e+00, 73 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 (73 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 16:14:16 2012 Optimize a model with 157 rows, 200 columns and 390 nonzeros Presolve removed 95 rows and 133 columns Presolve time: 0.00s Presolved: 62 rows, 67 columns, 186 nonzeros Variable types: 0 continuous, 67 integer (67 binary) Root relaxation: objective 0.000000e+00, 29 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 (29 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 16:14:16 2012 Optimize a model with 119 rows, 119 columns and 195 nonzeros Presolve removed 119 rows and 119 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