current bounds on the number of colors: 0 -- 154 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:20:33 2012 Optimize a model with 9240 rows, 11976 columns and 39116 nonzeros Presolve removed 35 rows and 2695 columns Presolve time: 0.11s Presolved: 9205 rows, 9281 columns, 36421 nonzeros Variable types: 0 continuous, 9281 integer (9281 binary) Root relaxation: objective 0.000000e+00, 208 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 (208 simplex iterations) in 0.12 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 -- 77 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:20:33 2012 Optimize a model with 4638 rows, 5970 columns and 19304 nonzeros Presolve removed 35 rows and 1330 columns Presolve time: 0.04s Presolved: 4603 rows, 4640 columns, 17974 nonzeros Variable types: 0 continuous, 4640 integer (4640 binary) Root relaxation: objective 0.000000e+00, 206 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 (206 simplex iterations) in 0.04 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 -- 38 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:20:33 2012 Optimize a model with 2396 rows, 3044 columns and 9652 nonzeros Presolve removed 35 rows and 665 columns Presolve time: 0.01s Presolved: 2361 rows, 2379 columns, 8987 nonzeros Variable types: 0 continuous, 2379 integer (2379 binary) Root relaxation: objective 0.000000e+00, 209 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 (209 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 -- 19 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:20:33 2012 Optimize a model with 1216 rows, 1504 columns and 4572 nonzeros Presolve removed 35 rows and 315 columns Presolve time: 0.01s Presolved: 1181 rows, 1189 columns, 4257 nonzeros Variable types: 0 continuous, 1189 integer (1189 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 0.01 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 -- 9 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:20:33 2012 Optimize a model with 626 rows, 734 columns and 2032 nonzeros Presolve removed 35 rows and 140 columns Presolve time: 0.00s Presolved: 591 rows, 594 columns, 1892 nonzeros Variable types: 0 continuous, 594 integer (594 binary) Root relaxation: objective 0.000000e+00, 179 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 (179 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 16:20:33 2012 Optimize a model with 390 rows, 426 columns and 1016 nonzeros Presolve removed 164 rows and 204 columns Presolve time: 0.00s Presolved: 226 rows, 222 columns, 678 nonzeros Variable types: 0 continuous, 222 integer (222 binary) Root relaxation: objective 0.000000e+00, 112 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 88 - 0.00000 - - 0s Explored 0 nodes (356 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 16:20:33 2012 Optimize a model with 508 rows, 580 columns and 1524 nonzeros Presolve removed 35 rows and 105 columns Presolve time: 0.00s Presolved: 473 rows, 475 columns, 1419 nonzeros Variable types: 0 continuous, 475 integer (475 binary) Root relaxation: objective 0.000000e+00, 178 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 (229 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