current bounds on the number of colors: 0 -- 63 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:40 2012 Optimize a model with 652 rows, 1972 columns and 3720 nonzeros Presolve removed 36 rows and 1116 columns Presolve time: 0.01s Presolved: 616 rows, 856 columns, 2604 nonzeros Variable types: 0 continuous, 856 integer (856 binary) Root relaxation: objective 0.000000e+00, 43 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 (43 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 -- 31 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:40 2012 Optimize a model with 348 rows, 964 columns and 1800 nonzeros Presolve removed 36 rows and 540 columns Presolve time: 0.00s Presolved: 312 rows, 424 columns, 1260 nonzeros Variable types: 0 continuous, 424 integer (424 binary) Root relaxation: objective 0.000000e+00, 43 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 (43 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 -- 15 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:40 2012 Optimize a model with 196 rows, 460 columns and 840 nonzeros Presolve removed 36 rows and 252 columns Presolve time: 0.00s Presolved: 160 rows, 208 columns, 588 nonzeros Variable types: 0 continuous, 208 integer (208 binary) Root relaxation: objective 0.000000e+00, 44 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 (44 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 -- 7 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:40 2012 Optimize a model with 120 rows, 208 columns and 360 nonzeros Presolve removed 36 rows and 108 columns Presolve time: 0.00s Presolved: 84 rows, 100 columns, 252 nonzeros Variable types: 0 continuous, 100 integer (100 binary) Root relaxation: objective 0.000000e+00, 39 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 (39 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 -- 3 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:40 2012 Optimize a model with 82 rows, 82 columns and 120 nonzeros Presolve removed 82 rows and 82 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 - current bounds on the number of colors: 1 -- 3 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:40 2012 Optimize a model with 101 rows, 145 columns and 240 nonzeros Presolve removed 69 rows and 108 columns Presolve time: 0.00s Presolved: 32 rows, 37 columns, 96 nonzeros Variable types: 0 continuous, 37 integer (37 binary) Root relaxation: objective 0.000000e+00, 13 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 (13 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: 2