current bounds on the number of colors: 0 -- 95 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:51 2012 Optimize a model with 2680 rows, 4520 columns and 12220 nonzeros Presolve removed 30 rows and 1410 columns Presolve time: 0.03s Presolved: 2650 rows, 3110 columns, 10810 nonzeros Variable types: 0 continuous, 3110 integer (3110 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 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (112 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 -- 47 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:51 2012 Optimize a model with 1360 rows, 2240 columns and 5980 nonzeros Presolve removed 30 rows and 690 columns Presolve time: 0.01s Presolved: 1330 rows, 1550 columns, 5290 nonzeros Variable types: 0 continuous, 1550 integer (1550 binary) Root relaxation: objective 0.000000e+00, 111 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 (111 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 -- 23 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:52 2012 Optimize a model with 700 rows, 1100 columns and 2860 nonzeros Presolve removed 30 rows and 330 columns Presolve time: 0.00s Presolved: 670 rows, 770 columns, 2530 nonzeros Variable types: 0 continuous, 770 integer (770 binary) Root relaxation: objective 0.000000e+00, 109 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 (109 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 -- 11 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:52 2012 Optimize a model with 370 rows, 530 columns and 1300 nonzeros Presolve removed 30 rows and 150 columns Presolve time: 0.00s Presolved: 340 rows, 380 columns, 1150 nonzeros Variable types: 0 continuous, 380 integer (380 binary) Root relaxation: objective 0.000000e+00, 95 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 (95 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 16:14:52 2012 Optimize a model with 205 rows, 245 columns and 520 nonzeros Presolve removed 111 rows and 149 columns Presolve time: 0.00s Presolved: 94 rows, 96 columns, 282 nonzeros Variable types: 0 continuous, 96 integer (96 binary) Root relaxation: objective 0.000000e+00, 53 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 39 - 0.00000 - - 0s Explored 0 nodes (167 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 16:14:52 2012 Optimize a model with 260 rows, 340 columns and 780 nonzeros Presolve removed 30 rows and 90 columns Presolve time: 0.00s Presolved: 230 rows, 250 columns, 690 nonzeros Variable types: 0 continuous, 250 integer (250 binary) Root relaxation: objective 0.000000e+00, 86 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 (86 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