current bounds on the number of colors: 0 -- 152 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:20:14 2012 Optimize a model with 9576 rows, 11676 columns and 39824 nonzeros Presolve removed 23 rows and 1748 columns Presolve time: 0.11s Presolved: 9553 rows, 9928 columns, 38076 nonzeros Variable types: 0 continuous, 9928 integer (9928 binary) Root relaxation: objective 0.000000e+00, 222 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 (222 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 -- 76 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:20:14 2012 Optimize a model with 4864 rows, 5900 columns and 19912 nonzeros Presolve removed 23 rows and 874 columns Presolve time: 0.04s Presolved: 4841 rows, 5026 columns, 19038 nonzeros Variable types: 0 continuous, 5026 integer (5026 binary) Root relaxation: objective 0.000000e+00, 223 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 (223 simplex iterations) in 0.05 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 16:20:14 2012 Optimize a model with 2508 rows, 3012 columns and 9956 nonzeros Presolve removed 23 rows and 437 columns Presolve time: 0.01s Presolved: 2485 rows, 2575 columns, 9519 nonzeros Variable types: 0 continuous, 2575 integer (2575 binary) Root relaxation: objective 0.000000e+00, 225 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 (225 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 16:20:14 2012 Optimize a model with 1268 rows, 1492 columns and 4716 nonzeros Presolve removed 23 rows and 207 columns Presolve time: 0.01s Presolved: 1245 rows, 1285 columns, 4509 nonzeros Variable types: 0 continuous, 1285 integer (1285 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 0.01 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 16:20:14 2012 Optimize a model with 648 rows, 732 columns and 2096 nonzeros Presolve removed 23 rows and 92 columns Presolve time: 0.00s Presolved: 625 rows, 640 columns, 2004 nonzeros Variable types: 0 continuous, 640 integer (640 binary) Root relaxation: objective 0.000000e+00, 195 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 (195 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 16:20:14 2012 Optimize a model with 400 rows, 428 columns and 1048 nonzeros Presolve removed 162 rows and 190 columns Presolve time: 0.00s Presolved: 238 rows, 238 columns, 714 nonzeros Variable types: 0 continuous, 238 integer (238 binary) Root relaxation: objective 0.000000e+00, 132 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 99 - 0.00000 - - 0s Explored 0 nodes (316 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 16:20:14 2012 Optimize a model with 524 rows, 580 columns and 1572 nonzeros Presolve removed 23 rows and 69 columns Presolve time: 0.00s Presolved: 501 rows, 511 columns, 1503 nonzeros Variable types: 0 continuous, 511 integer (511 binary) Root relaxation: objective 0.000000e+00, 204 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 (204 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