current bounds on the number of colors: 0 -- 128 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:17:14 2012 Optimize a model with 5824 rows, 8281 columns and 25280 nonzeros Presolve removed 27 rows and 1728 columns Presolve time: 0.07s Presolved: 5797 rows, 6553 columns, 23552 nonzeros Variable types: 0 continuous, 6553 integer (6553 binary) Root relaxation: objective 0.000000e+00, 168 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 (168 simplex iterations) in 0.09 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 -- 64 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:17:15 2012 Optimize a model with 2976 rows, 4185 columns and 12640 nonzeros Presolve removed 27 rows and 864 columns Presolve time: 0.02s Presolved: 2949 rows, 3321 columns, 11776 nonzeros Variable types: 0 continuous, 3321 integer (3321 binary) Root relaxation: objective 0.000000e+00, 168 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 (168 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 -- 32 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:17:15 2012 Optimize a model with 1552 rows, 2137 columns and 6320 nonzeros Presolve removed 27 rows and 432 columns Presolve time: 0.01s Presolved: 1525 rows, 1705 columns, 5888 nonzeros Variable types: 0 continuous, 1705 integer (1705 binary) Root relaxation: objective 0.000000e+00, 166 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 (166 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 -- 16 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:17:15 2012 Optimize a model with 840 rows, 1113 columns and 3160 nonzeros Presolve removed 27 rows and 216 columns Presolve time: 0.00s Presolved: 813 rows, 897 columns, 2944 nonzeros Variable types: 0 continuous, 897 integer (897 binary) Root relaxation: objective 0.000000e+00, 168 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 (168 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 16:17:15 2012 Optimize a model with 484 rows, 601 columns and 1580 nonzeros Presolve removed 27 rows and 108 columns Presolve time: 0.00s Presolved: 457 rows, 493 columns, 1472 nonzeros Variable types: 0 continuous, 493 integer (493 binary) Root relaxation: objective 0.000000e+00, 148 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 (148 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 16:17:15 2012 Optimize a model with 306 rows, 345 columns and 790 nonzeros Presolve removed 138 rows and 170 columns Presolve time: 0.00s Presolved: 168 rows, 175 columns, 504 nonzeros Variable types: 0 continuous, 175 integer (175 binary) Root relaxation: objective 0.000000e+00, 79 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 17 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (218 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 16:17:15 2012 Optimize a model with 395 rows, 473 columns and 1185 nonzeros Presolve removed 27 rows and 81 columns Presolve time: 0.00s Presolved: 368 rows, 392 columns, 1104 nonzeros Variable types: 0 continuous, 392 integer (392 binary) Root relaxation: objective 0.000000e+00, 152 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 (152 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