current bounds on the number of colors: 0 -- 135 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:18:03 2012 Optimize a model with 6299 rows, 9137 columns and 27537 nonzeros Presolve removed 31 rows and 2077 columns Presolve time: 0.08s Presolved: 6268 rows, 7060 columns, 25460 nonzeros Variable types: 0 continuous, 7060 integer (7060 binary) Root relaxation: objective 0.000000e+00, 182 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 (182 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 -- 67 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:18:03 2012 Optimize a model with 3171 rows, 4547 columns and 13563 nonzeros Presolve removed 31 rows and 1023 columns Presolve time: 0.03s Presolved: 3140 rows, 3524 columns, 12540 nonzeros Variable types: 0 continuous, 3524 integer (3524 binary) Root relaxation: objective 0.000000e+00, 179 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 (179 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 -- 33 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:18:03 2012 Optimize a model with 1607 rows, 2252 columns and 6576 nonzeros Presolve removed 31 rows and 496 columns Presolve time: 0.01s Presolved: 1576 rows, 1756 columns, 6080 nonzeros Variable types: 0 continuous, 1756 integer (1756 binary) Root relaxation: objective 0.000000e+00, 180 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 (180 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 16:18:03 2012 Optimize a model with 871 rows, 1172 columns and 3288 nonzeros Presolve removed 31 rows and 248 columns Presolve time: 0.00s Presolved: 840 rows, 924 columns, 3040 nonzeros Variable types: 0 continuous, 924 integer (924 binary) Root relaxation: objective 0.000000e+00, 163 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 (163 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 16:18:03 2012 Optimize a model with 503 rows, 632 columns and 1644 nonzeros Presolve removed 31 rows and 124 columns Presolve time: 0.00s Presolved: 472 rows, 508 columns, 1520 nonzeros Variable types: 0 continuous, 508 integer (508 binary) Root relaxation: objective 0.000000e+00, 162 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 (162 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 16:18:03 2012 Optimize a model with 319 rows, 362 columns and 822 nonzeros Presolve removed 147 rows and 184 columns Presolve time: 0.00s Presolved: 172 rows, 178 columns, 516 nonzeros Variable types: 0 continuous, 178 integer (178 binary) Root relaxation: objective 0.000000e+00, 88 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 50 - 0.00000 - - 0s Explored 0 nodes (281 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 16:18:03 2012 Optimize a model with 411 rows, 497 columns and 1233 nonzeros Presolve removed 31 rows and 93 columns Presolve time: 0.00s Presolved: 380 rows, 404 columns, 1140 nonzeros Variable types: 0 continuous, 404 integer (404 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