current bounds on the number of colors: 0 -- 45 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:45 2012 Optimize a model with 1299 rows, 1047 columns and 4752 nonzeros Presolve removed 2 rows and 44 columns Presolve time: 0.01s Presolved: 1297 rows, 1003 columns, 4708 nonzeros Variable types: 0 continuous, 1003 integer (1003 binary) Root relaxation: objective 0.000000e+00, 86 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 (86 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 -- 22 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:45 2012 Optimize a model with 672 rows, 552 columns and 2376 nonzeros Presolve removed 2 rows and 22 columns Presolve time: 0.00s Presolved: 670 rows, 530 columns, 2354 nonzeros Variable types: 0 continuous, 530 integer (530 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 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (117 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 -- 11 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:45 2012 Optimize a model with 330 rows, 282 columns and 1080 nonzeros Presolve removed 2 rows and 10 columns Presolve time: 0.00s Presolved: 328 rows, 272 columns, 1070 nonzeros Variable types: 0 continuous, 272 integer (272 binary) Root relaxation: objective 0.000000e+00, 82 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 (82 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:45 2012 Optimize a model with 159 rows, 147 columns and 432 nonzeros Presolve removed 47 rows and 50 columns Presolve time: 0.00s Presolved: 112 rows, 97 columns, 336 nonzeros Variable types: 0 continuous, 97 integer (97 binary) Root relaxation: objective 0.000000e+00, 45 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 41 - 0.00000 - - 0s Explored 0 nodes (140 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:45 2012 Optimize a model with 216 rows, 192 columns and 648 nonzeros Presolve removed 2 rows and 6 columns Presolve time: 0.00s Presolved: 214 rows, 186 columns, 642 nonzeros Variable types: 0 continuous, 186 integer (186 binary) Root relaxation: objective 0.000000e+00, 81 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 (81 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