current bounds on the number of colors: 0 -- 103 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:20 2012 Optimize a model with 2500 rows, 5300 columns and 12444 nonzeros Presolve removed 42 rows and 2142 columns Presolve time: 0.03s Presolved: 2458 rows, 3158 columns, 10302 nonzeros Variable types: 0 continuous, 3158 integer (3158 binary) Root relaxation: objective 0.000000e+00, 96 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 (96 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 -- 51 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:20 2012 Optimize a model with 1278 rows, 2622 columns and 6100 nonzeros Presolve removed 42 rows and 1050 columns Presolve time: 0.01s Presolved: 1236 rows, 1572 columns, 5050 nonzeros Variable types: 0 continuous, 1572 integer (1572 binary) Root relaxation: objective 0.000000e+00, 96 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 (96 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 -- 25 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:20 2012 Optimize a model with 667 rows, 1283 columns and 2928 nonzeros Presolve removed 42 rows and 504 columns Presolve time: 0.00s Presolved: 625 rows, 779 columns, 2424 nonzeros Variable types: 0 continuous, 779 integer (779 binary) Root relaxation: objective 0.000000e+00, 96 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 (96 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 -- 12 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:20 2012 Optimize a model with 385 rows, 665 columns and 1464 nonzeros Presolve removed 42 rows and 252 columns Presolve time: 0.00s Presolved: 343 rows, 413 columns, 1212 nonzeros Variable types: 0 continuous, 413 integer (413 binary) Root relaxation: objective 0.000000e+00, 92 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 (92 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 -- 6 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:20 2012 Optimize a model with 244 rows, 356 columns and 732 nonzeros Presolve removed 42 rows and 126 columns Presolve time: 0.00s Presolved: 202 rows, 230 columns, 606 nonzeros Variable types: 0 continuous, 230 integer (230 binary) Root relaxation: objective 0.000000e+00, 89 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 (89 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 16:15:20 2012 Optimize a model with 150 rows, 150 columns and 244 nonzeros Presolve removed 150 rows and 150 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 16:15:20 2012 Optimize a model with 197 rows, 253 columns and 488 nonzeros Presolve removed 113 rows and 160 columns Presolve time: 0.00s Presolved: 84 rows, 93 columns, 252 nonzeros Variable types: 0 continuous, 93 integer (93 binary) Root relaxation: objective 0.000000e+00, 30 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 (30 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