current bounds on the number of colors: 0 -- 135 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:18:04 2012 Optimize a model with 7840 rows, 9160 columns and 32160 nonzeros Presolve removed 23 rows and 1541 columns Presolve time: 0.10s Presolved: 7817 rows, 7619 columns, 30619 nonzeros Variable types: 0 continuous, 7619 integer (7619 binary) Root relaxation: objective 0.000000e+00, 203 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 (203 simplex iterations) in 0.11 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 -- 67 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:18:04 2012 Optimize a model with 3930 rows, 4570 columns and 15840 nonzeros Presolve removed 23 rows and 759 columns Presolve time: 0.03s Presolved: 3907 rows, 3811 columns, 15081 nonzeros Variable types: 0 continuous, 3811 integer (3811 binary) Root relaxation: objective 0.000000e+00, 200 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 (200 simplex iterations) in 0.03 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 -- 33 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:18:04 2012 Optimize a model with 1975 rows, 2275 columns and 7680 nonzeros Presolve removed 23 rows and 368 columns Presolve time: 0.01s Presolved: 1952 rows, 1907 columns, 7312 nonzeros Variable types: 0 continuous, 1907 integer (1907 binary) Root relaxation: objective 0.000000e+00, 205 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 (406 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 -- 16 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:18:04 2012 Optimize a model with 1055 rows, 1195 columns and 3840 nonzeros Presolve removed 23 rows and 184 columns Presolve time: 0.00s Presolved: 1032 rows, 1011 columns, 3656 nonzeros Variable types: 0 continuous, 1011 integer (1011 binary) Root relaxation: objective 0.000000e+00, 186 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 (186 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 -- 8 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:18:04 2012 Optimize a model with 595 rows, 655 columns and 1920 nonzeros Presolve removed 23 rows and 92 columns Presolve time: 0.00s Presolved: 572 rows, 563 columns, 1828 nonzeros Variable types: 0 continuous, 563 integer (563 binary) Root relaxation: objective 0.000000e+00, 177 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 (239 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 Sat Dec 15 16:18:04 2012 Optimize a model with 365 rows, 385 columns and 960 nonzeros Presolve removed 141 rows and 167 columns Presolve time: 0.00s Presolved: 224 rows, 218 columns, 672 nonzeros Variable types: 0 continuous, 218 integer (218 binary) Root relaxation: objective 0.000000e+00, 119 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 0 100 - 0.00000 - - 0s Explored 0 nodes (378 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 Sat Dec 15 16:18:04 2012 Optimize a model with 480 rows, 520 columns and 1440 nonzeros Presolve removed 23 rows and 69 columns Presolve time: 0.00s Presolved: 457 rows, 451 columns, 1371 nonzeros Variable types: 0 continuous, 451 integer (451 binary) Root relaxation: objective 0.000000e+00, 191 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 (191 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