current bounds on the number of colors: 0 -- 54 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:00 2012 Optimize a model with 1917 rows, 1527 columns and 7047 nonzeros Presolve removed 3 rows and 81 columns Presolve time: 0.01s Presolved: 1914 rows, 1446 columns, 6966 nonzeros Variable types: 0 continuous, 1446 integer (1446 binary) Root relaxation: objective 0.000000e+00, 90 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 (90 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 -- 27 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:00 2012 Optimize a model with 951 rows, 771 columns and 3393 nonzeros Presolve removed 3 rows and 39 columns Presolve time: 0.00s Presolved: 948 rows, 732 columns, 3354 nonzeros Variable types: 0 continuous, 732 integer (732 binary) Root relaxation: objective 0.000000e+00, 95 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 (95 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 -- 13 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:00 2012 Optimize a model with 468 rows, 393 columns and 1566 nonzeros Presolve removed 3 rows and 18 columns Presolve time: 0.00s Presolved: 465 rows, 375 columns, 1548 nonzeros Variable types: 0 continuous, 375 integer (375 binary) Root relaxation: objective 0.000000e+00, 100 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 (100 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 -- 6 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:00 2012 Optimize a model with 261 rows, 231 columns and 783 nonzeros Presolve removed 3 rows and 9 columns Presolve time: 0.00s Presolved: 258 rows, 222 columns, 774 nonzeros Variable types: 0 continuous, 222 integer (222 binary) Root relaxation: objective 0.000000e+00, 87 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 (87 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 -- 3 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:00 2012 Optimize a model with 123 rows, 123 columns and 261 nonzeros Presolve removed 123 rows and 123 columns Presolve time: 0.00s Explored 0 nodes (0 simplex iterations) in 0.00 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: 1 -- 3 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:00 2012 Optimize a model with 192 rows, 177 columns and 522 nonzeros Presolve removed 54 rows and 57 columns Presolve time: 0.00s Presolved: 138 rows, 120 columns, 414 nonzeros Variable types: 0 continuous, 120 integer (120 binary) Root relaxation: objective 0.000000e+00, 61 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 51 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (211 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 - optimal solution found: number of colors: 3