current bounds on the number of colors: 0 -- 35 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:31 2012 Optimize a model with 715 rows, 635 columns and 2635 nonzeros Presolve removed 5 rows and 85 columns Presolve time: 0.00s Presolved: 710 rows, 550 columns, 2550 nonzeros Variable types: 0 continuous, 550 integer (550 binary) Root relaxation: objective 0.000000e+00, 56 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 (56 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 -- 17 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:31 2012 Optimize a model with 355 rows, 320 columns and 1240 nonzeros Presolve removed 5 rows and 40 columns Presolve time: 0.00s Presolved: 350 rows, 280 columns, 1200 nonzeros Variable types: 0 continuous, 280 integer (280 binary) Root relaxation: objective 0.000000e+00, 50 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 -- 8 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:31 2012 Optimize a model with 195 rows, 180 columns and 620 nonzeros Presolve removed 5 rows and 20 columns Presolve time: 0.00s Presolved: 190 rows, 160 columns, 600 nonzeros Variable types: 0 continuous, 160 integer (160 binary) Root relaxation: objective 0.000000e+00, 54 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 (54 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:31 2012 Optimize a model with 115 rows, 110 columns and 310 nonzeros Presolve removed 35 rows and 40 columns Presolve time: 0.00s Presolved: 80 rows, 70 columns, 240 nonzeros Variable types: 0 continuous, 70 integer (70 binary) Root relaxation: objective 0.000000e+00, 33 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 30 - 0.00000 - - 0s Explored 0 nodes (109 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:31 2012 Optimize a model with 155 rows, 145 columns and 465 nonzeros Presolve removed 5 rows and 15 columns Presolve time: 0.00s Presolved: 150 rows, 130 columns, 450 nonzeros Variable types: 0 continuous, 130 integer (130 binary) Root relaxation: objective 0.000000e+00, 55 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 (55 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