current bounds on the number of colors: 0 -- 99 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:24:21 2012 Optimize a model with 11467 rows, 5083 columns and 38955 nonzeros Presolve time: 0.08s Presolved: 11467 rows, 5083 columns, 38955 nonzeros Variable types: 0 continuous, 5083 integer (5083 binary) Root relaxation: objective 0.000000e+00, 244 iterations, 0.01 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 (409 simplex iterations) in 0.10 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 -- 49 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:24:21 2012 Optimize a model with 5667 rows, 2608 columns and 19080 nonzeros Presolve time: 0.03s Presolved: 5667 rows, 2608 columns, 19080 nonzeros Variable types: 0 continuous, 2608 integer (2608 binary) Root relaxation: objective 0.000000e+00, 239 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 (501 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 -- 24 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:24:21 2012 Optimize a model with 2883 rows, 1420 columns and 9540 nonzeros Presolve time: 0.01s Presolved: 2883 rows, 1420 columns, 9540 nonzeros Variable types: 0 continuous, 1420 integer (1420 binary) Root relaxation: objective 0.000000e+00, 207 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 (347 simplex iterations) in 0.02 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 Fri Dec 14 18:24:22 2012 Optimize a model with 1491 rows, 826 columns and 4770 nonzeros Presolve time: 0.00s Presolved: 1491 rows, 826 columns, 4770 nonzeros Variable types: 0 continuous, 826 integer (826 binary) Root relaxation: objective 0.000000e+00, 228 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 (397 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 -- 6 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:24:22 2012 Optimize a model with 795 rows, 529 columns and 2385 nonzeros Presolve time: 0.00s Presolved: 795 rows, 529 columns, 2385 nonzeros Variable types: 0 continuous, 529 integer (529 binary) Root relaxation: objective 0.000000e+00, 245 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 0 178 - 0.00000 - - 0s 0 0 0.00000 0 152 - 0.00000 - - 0s 0 0 0.00000 0 182 - 0.00000 - - 0s 0 0 0.00000 0 186 - 0.00000 - - 0s 0 0 0.00000 0 191 - 0.00000 - - 0s 0 0 0.00000 0 213 - 0.00000 - - 0s 0 0 0.00000 0 194 - 0.00000 - - 0s 0 2 0.00000 0 194 - 0.00000 - - 0s Cutting planes: Zero half: 20 Explored 9 nodes (5370 simplex iterations) in 0.29 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: 3 -- 6 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:24:22 2012 Optimize a model with 1027 rows, 628 columns and 3180 nonzeros Presolve time: 0.00s Presolved: 1027 rows, 628 columns, 3180 nonzeros Variable types: 0 continuous, 628 integer (628 binary) Root relaxation: objective 0.000000e+00, 252 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 (438 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% optimal solution found: number of colors: 4