current bounds on the number of colors: 0 -- 143 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:18:55 2012 Optimize a model with 8024 rows, 10264 columns and 33796 nonzeros Presolve removed 22 rows and 1562 columns Presolve time: 0.10s Presolved: 8002 rows, 8702 columns, 32234 nonzeros Variable types: 0 continuous, 8702 integer (8702 binary) Root relaxation: objective 0.000000e+00, 205 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 (205 simplex iterations) in 0.11 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 -- 71 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:18:55 2012 Optimize a model with 4028 rows, 5116 columns and 16660 nonzeros Presolve removed 22 rows and 770 columns Presolve time: 0.03s Presolved: 4006 rows, 4346 columns, 15890 nonzeros Variable types: 0 continuous, 4346 integer (4346 binary) Root relaxation: objective 0.000000e+00, 205 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 (205 simplex iterations) in 0.04 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 -- 35 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:18:55 2012 Optimize a model with 2030 rows, 2542 columns and 8092 nonzeros Presolve removed 22 rows and 374 columns Presolve time: 0.01s Presolved: 2008 rows, 2168 columns, 7718 nonzeros Variable types: 0 continuous, 2168 integer (2168 binary) Root relaxation: objective 0.000000e+00, 205 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 (205 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 -- 17 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:18:55 2012 Optimize a model with 1031 rows, 1255 columns and 3808 nonzeros Presolve removed 22 rows and 176 columns Presolve time: 0.00s Presolved: 1009 rows, 1079 columns, 3632 nonzeros Variable types: 0 continuous, 1079 integer (1079 binary) Root relaxation: objective 0.000000e+00, 200 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 (200 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 -- 8 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:18:55 2012 Optimize a model with 587 rows, 683 columns and 1904 nonzeros Presolve removed 22 rows and 88 columns Presolve time: 0.00s Presolved: 565 rows, 595 columns, 1816 nonzeros Variable types: 0 continuous, 595 integer (595 binary) Root relaxation: objective 0.000000e+00, 177 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 (177 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 16:18:55 2012 Optimize a model with 365 rows, 397 columns and 952 nonzeros Presolve removed 159 rows and 189 columns Presolve time: 0.00s Presolved: 206 rows, 208 columns, 618 nonzeros Variable types: 0 continuous, 208 integer (208 binary) Root relaxation: objective 0.000000e+00, 100 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 79 - 0.00000 - - 0s Explored 0 nodes (305 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 -- 4 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:18:55 2012 Optimize a model with 476 rows, 540 columns and 1428 nonzeros Presolve removed 22 rows and 66 columns Presolve time: 0.00s Presolved: 454 rows, 474 columns, 1362 nonzeros Variable types: 0 continuous, 474 integer (474 binary) Root relaxation: objective 0.000000e+00, 183 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 (183 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