current bounds on the number of colors: 0 -- 175 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:24:03 2012 Optimize a model with 13660 rows, 15380 columns and 55680 nonzeros Presolve removed 25 rows and 2175 columns Presolve time: 0.11s Presolved: 13635 rows, 13205 columns, 53505 nonzeros Variable types: 0 continuous, 13205 integer (13205 binary) Root relaxation: objective 0.000000e+00, 258 iterations, 0.01 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 (258 simplex iterations) in 0.13 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 -- 87 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:24:03 2012 Optimize a model with 6840 rows, 7680 columns and 27520 nonzeros Presolve removed 25 rows and 1075 columns Presolve time: 0.06s Presolved: 6815 rows, 6605 columns, 26445 nonzeros Variable types: 0 continuous, 6605 integer (6605 binary) Root relaxation: objective 0.000000e+00, 260 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 (260 simplex iterations) in 0.07 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 -- 43 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:24:04 2012 Optimize a model with 3430 rows, 3830 columns and 13440 nonzeros Presolve removed 25 rows and 525 columns Presolve time: 0.02s Presolved: 3405 rows, 3305 columns, 12915 nonzeros Variable types: 0 continuous, 3305 integer (3305 binary) Root relaxation: objective 0.000000e+00, 260 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 (260 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 -- 21 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:24:04 2012 Optimize a model with 1725 rows, 1905 columns and 6400 nonzeros Presolve removed 25 rows and 250 columns Presolve time: 0.01s Presolved: 1700 rows, 1655 columns, 6150 nonzeros Variable types: 0 continuous, 1655 integer (1655 binary) Root relaxation: objective 0.000000e+00, 267 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 (267 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 -- 10 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:24:04 2012 Optimize a model with 950 rows, 1030 columns and 3200 nonzeros Presolve removed 25 rows and 125 columns Presolve time: 0.00s Presolved: 925 rows, 905 columns, 3075 nonzeros Variable types: 0 continuous, 905 integer (905 binary) Root relaxation: objective 0.000000e+00, 247 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 (247 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 16:24:04 2012 Optimize a model with 485 rows, 505 columns and 1280 nonzeros Presolve removed 185 rows and 215 columns Presolve time: 0.00s Presolved: 300 rows, 290 columns, 900 nonzeros Variable types: 0 continuous, 290 integer (290 binary) Root relaxation: objective 0.000000e+00, 155 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 0 127 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (458 simplex iterations) in 0.01 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 16:24:04 2012 Optimize a model with 640 rows, 680 columns and 1920 nonzeros Presolve removed 25 rows and 75 columns Presolve time: 0.00s Presolved: 615 rows, 605 columns, 1845 nonzeros Variable types: 0 continuous, 605 integer (605 binary) Root relaxation: objective 0.000000e+00, 249 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 (249 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