current bounds on the number of colors: 0 -- 25 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:56:11 2012 Optimize a model with 1933 rows, 459 columns and 6024 nonzeros Presolve time: 0.01s Presolved: 1933 rows, 459 columns, 6024 nonzeros Variable types: 0 continuous, 459 integer (459 binary) Root relaxation: objective 0.000000e+00, 64 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 (132 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 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:56:12 2012 Optimize a model with 979 rows, 309 columns and 3012 nonzeros Presolve time: 0.00s Presolved: 979 rows, 309 columns, 3012 nonzeros Variable types: 0 continuous, 309 integer (309 binary) Root relaxation: objective 0.000000e+00, 51 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 30 - 0.00000 - - 0s 0 0 0.00000 0 38 - 0.00000 - - 0s 0 0 0.00000 0 32 - 0.00000 - - 0s 0 0 0.00000 0 79 - 0.00000 - - 0s 0 0 0.00000 0 37 - 0.00000 - - 0s 0 0 0.00000 0 73 - 0.00000 - - 0s 0 0 0.00000 0 37 - 0.00000 - - 0s 0 0 0.00000 0 70 - 0.00000 - - 0s 0 0 0.00000 0 70 - 0.00000 - - 0s 0 2 0.00000 0 70 - 0.00000 - - 0s Cutting planes: Gomory: 2 Clique: 2 Zero half: 4 Explored 5 nodes (3791 simplex iterations) in 0.27 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: 6 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:56:12 2012 Optimize a model with 1456 rows, 384 columns and 4518 nonzeros Presolve time: 0.00s Presolved: 1456 rows, 384 columns, 4518 nonzeros Variable types: 0 continuous, 384 integer (384 binary) Root relaxation: objective 0.000000e+00, 58 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 (223 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: 6 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:56:12 2012 Optimize a model with 1138 rows, 334 columns and 3514 nonzeros Presolve time: 0.00s Presolved: 1138 rows, 334 columns, 3514 nonzeros Variable types: 0 continuous, 334 integer (334 binary) Root relaxation: objective 0.000000e+00, 57 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 15 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (387 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: 7