current bounds on the number of colors: 0 -- 65 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:42 2012 Optimize a model with 705 rows, 2100 columns and 4000 nonzeros Presolve removed 35 rows and 1120 columns Presolve time: 0.01s Presolved: 670 rows, 980 columns, 2880 nonzeros Variable types: 0 continuous, 980 integer (980 binary) Root relaxation: objective 0.000000e+00, 47 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 (47 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 -- 32 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:42 2012 Optimize a model with 385 rows, 1060 columns and 2000 nonzeros Presolve removed 35 rows and 560 columns Presolve time: 0.00s Presolved: 350 rows, 500 columns, 1440 nonzeros Variable types: 0 continuous, 500 integer (500 binary) Root relaxation: objective 0.000000e+00, 50 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 (50 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 -- 16 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:42 2012 Optimize a model with 225 rows, 540 columns and 1000 nonzeros Presolve removed 35 rows and 280 columns Presolve time: 0.00s Presolved: 190 rows, 260 columns, 720 nonzeros Variable types: 0 continuous, 260 integer (260 binary) Root relaxation: objective 0.000000e+00, 48 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 (48 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 -- 8 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:42 2012 Optimize a model with 145 rows, 280 columns and 500 nonzeros Presolve removed 35 rows and 140 columns Presolve time: 0.00s Presolved: 110 rows, 140 columns, 360 nonzeros Variable types: 0 continuous, 140 integer (140 binary) Root relaxation: objective 0.000000e+00, 42 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 (42 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 16:13:42 2012 Optimize a model with 105 rows, 150 columns and 250 nonzeros Presolve removed 75 rows and 115 columns Presolve time: 0.00s Presolved: 30 rows, 35 columns, 90 nonzeros Variable types: 0 continuous, 35 integer (35 binary) Root relaxation: objective 0.000000e+00, 12 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 (12 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 -- 2 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:43 2012 Optimize a model with 85 rows, 85 columns and 125 nonzeros Presolve removed 85 rows and 85 columns Presolve time: 0.00s Explored 0 nodes (0 simplex iterations) in 0.00 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 2