current bounds on the number of colors: 0 -- 83 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:19 2012 Optimize a model with 1518 rows, 3438 columns and 7708 nonzeros Presolve removed 32 rows and 1312 columns Presolve time: 0.02s Presolved: 1486 rows, 2126 columns, 6396 nonzeros Variable types: 0 continuous, 2126 integer (2126 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 0.02 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 -- 41 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:19 2012 Optimize a model with 783 rows, 1695 columns and 3760 nonzeros Presolve removed 32 rows and 640 columns Presolve time: 0.01s Presolved: 751 rows, 1055 columns, 3120 nonzeros Variable types: 0 continuous, 1055 integer (1055 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 0.01 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 16:14:19 2012 Optimize a model with 433 rows, 865 columns and 1880 nonzeros Presolve removed 32 rows and 320 columns Presolve time: 0.00s Presolved: 401 rows, 545 columns, 1560 nonzeros Variable types: 0 continuous, 545 integer (545 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 (110 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 16:14:19 2012 Optimize a model with 258 rows, 450 columns and 940 nonzeros Presolve removed 32 rows and 160 columns Presolve time: 0.00s Presolved: 226 rows, 290 columns, 780 nonzeros Variable types: 0 continuous, 290 integer (290 binary) Root relaxation: objective 0.000000e+00, 72 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 (72 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 16:14:19 2012 Optimize a model with 153 rows, 201 columns and 376 nonzeros Presolve removed 103 rows and 145 columns Presolve time: 0.00s Presolved: 50 rows, 56 columns, 150 nonzeros Variable types: 0 continuous, 56 integer (56 binary) Root relaxation: objective 0.000000e+00, 24 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 9 - 0.00000 - - 0s Explored 0 nodes (71 simplex iterations) in 0.00 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 16:14:19 2012 Optimize a model with 188 rows, 284 columns and 564 nonzeros Presolve removed 32 rows and 96 columns Presolve time: 0.00s Presolved: 156 rows, 188 columns, 468 nonzeros Variable types: 0 continuous, 188 integer (188 binary) Root relaxation: objective 0.000000e+00, 74 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 (98 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