current bounds on the number of colors: 0 -- 122 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:16:41 2012 Optimize a model with 5307 rows, 7527 columns and 22997 nonzeros Presolve removed 27 rows and 1647 columns Presolve time: 0.07s Presolved: 5280 rows, 5880 columns, 21350 nonzeros Variable types: 0 continuous, 5880 integer (5880 binary) Root relaxation: objective 0.000000e+00, 168 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 (168 simplex iterations) in 0.07 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 -- 61 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:16:41 2012 Optimize a model with 2672 rows, 3745 columns and 11310 nonzeros Presolve removed 27 rows and 810 columns Presolve time: 0.02s Presolved: 2645 rows, 2935 columns, 10500 nonzeros Variable types: 0 continuous, 2935 integer (2935 binary) Root relaxation: objective 0.000000e+00, 168 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 (168 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 -- 30 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:16:41 2012 Optimize a model with 1397 rows, 1915 columns and 5655 nonzeros Presolve removed 27 rows and 405 columns Presolve time: 0.01s Presolved: 1370 rows, 1510 columns, 5250 nonzeros Variable types: 0 continuous, 1510 integer (1510 binary) Root relaxation: objective 0.000000e+00, 171 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 (171 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 -- 15 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:16:41 2012 Optimize a model with 717 rows, 939 columns and 2639 nonzeros Presolve removed 27 rows and 189 columns Presolve time: 0.00s Presolved: 690 rows, 750 columns, 2450 nonzeros Variable types: 0 continuous, 750 integer (750 binary) Root relaxation: objective 0.000000e+00, 150 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 (150 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 -- 7 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:16:41 2012 Optimize a model with 377 rows, 451 columns and 1131 nonzeros Presolve removed 27 rows and 81 columns Presolve time: 0.00s Presolved: 350 rows, 370 columns, 1050 nonzeros Variable types: 0 continuous, 370 integer (370 binary) Root relaxation: objective 0.000000e+00, 145 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 (145 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 16:16:41 2012 Optimize a model with 207 rows, 207 columns and 377 nonzeros Presolve removed 207 rows and 207 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 16:16:41 2012 Optimize a model with 292 rows, 329 columns and 754 nonzeros Presolve removed 134 rows and 167 columns Presolve time: 0.00s Presolved: 158 rows, 162 columns, 474 nonzeros Variable types: 0 continuous, 162 integer (162 binary) Root relaxation: objective 0.000000e+00, 81 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 (81 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