current bounds on the number of colors: 0 -- 80 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:13 2012 Optimize a model with 1520 rows, 3236 columns and 7520 nonzeros Presolve removed 33 rows and 1320 columns Presolve time: 0.02s Presolved: 1487 rows, 1916 columns, 6200 nonzeros Variable types: 0 continuous, 1916 integer (1916 binary) Root relaxation: objective 0.000000e+00, 79 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 (79 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 -- 40 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:13 2012 Optimize a model with 800 rows, 1636 columns and 3760 nonzeros Presolve removed 33 rows and 660 columns Presolve time: 0.01s Presolved: 767 rows, 976 columns, 3100 nonzeros Variable types: 0 continuous, 976 integer (976 binary) Root relaxation: objective 0.000000e+00, 79 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 (79 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 -- 20 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:14 2012 Optimize a model with 440 rows, 836 columns and 1880 nonzeros Presolve removed 33 rows and 330 columns Presolve time: 0.00s Presolved: 407 rows, 506 columns, 1550 nonzeros Variable types: 0 continuous, 506 integer (506 binary) Root relaxation: objective 0.000000e+00, 76 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 (105 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 -- 10 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:14 2012 Optimize a model with 260 rows, 436 columns and 940 nonzeros Presolve removed 33 rows and 165 columns Presolve time: 0.00s Presolved: 227 rows, 271 columns, 775 nonzeros Variable types: 0 continuous, 271 integer (271 binary) Root relaxation: objective 0.000000e+00, 69 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 (69 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 16:14:14 2012 Optimize a model with 152 rows, 196 columns and 376 nonzeros Presolve removed 88 rows and 125 columns Presolve time: 0.00s Presolved: 64 rows, 71 columns, 192 nonzeros Variable types: 0 continuous, 71 integer (71 binary) Root relaxation: objective 0.000000e+00, 29 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 4 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (76 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 -- 5 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:14 2012 Optimize a model with 188 rows, 276 columns and 564 nonzeros Presolve removed 33 rows and 99 columns Presolve time: 0.00s Presolved: 155 rows, 177 columns, 465 nonzeros Variable types: 0 continuous, 177 integer (177 binary) Root relaxation: objective 0.000000e+00, 72 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 (72 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