current bounds on the number of colors: 0 -- 67 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:37:45 2012 Optimize a model with 7492 rows, 2436 columns and 24486 nonzeros Presolve time: 0.04s Presolved: 7492 rows, 2436 columns, 24486 nonzeros Variable types: 0 continuous, 2436 integer (2436 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 (315 simplex iterations) in 0.05 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 Thu Dec 13 19:37:45 2012 Optimize a model with 3667 rows, 1297 columns and 11872 nonzeros Presolve time: 0.01s Presolved: 3667 rows, 1297 columns, 11872 nonzeros Variable types: 0 continuous, 1297 integer (1297 binary) Root relaxation: objective 0.000000e+00, 145 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 (261 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 -- 16 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:37:45 2012 Optimize a model with 1867 rows, 761 columns and 5936 nonzeros Presolve time: 0.01s Presolved: 1867 rows, 761 columns, 5936 nonzeros Variable types: 0 continuous, 761 integer (761 binary) Root relaxation: objective 0.000000e+00, 144 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 (254 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 -- 8 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:37:45 2012 Optimize a model with 967 rows, 493 columns and 2968 nonzeros Presolve time: 0.00s Presolved: 967 rows, 493 columns, 2968 nonzeros Variable types: 0 continuous, 493 integer (493 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 (986 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 -- 4 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:37:45 2012 Optimize a model with 517 rows, 359 columns and 1484 nonzeros Presolve removed 67 rows and 67 columns Presolve time: 0.00s Presolved: 450 rows, 292 columns, 1350 nonzeros Variable types: 0 continuous, 292 integer (292 binary) Root relaxation: objective 0.000000e+00, 69 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 67 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (275 simplex iterations) in 0.01 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 Thu Dec 13 19:37:45 2012 Optimize a model with 742 rows, 426 columns and 2226 nonzeros Presolve time: 0.00s Presolved: 742 rows, 426 columns, 2226 nonzeros Variable types: 0 continuous, 426 integer (426 binary) Root relaxation: objective 0.000000e+00, 148 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 0 132 - 0.00000 - - 0s 0 0 0.00000 0 128 - 0.00000 - - 0s 0 0 0.00000 0 122 - 0.00000 - - 0s 0 0 0.00000 0 187 - 0.00000 - - 0s 0 0 0.00000 0 182 - 0.00000 - - 0s 0 0 0.00000 0 185 - 0.00000 - - 0s 0 0 0.00000 0 137 - 0.00000 - - 0s 0 0 0.00000 0 181 - 0.00000 - - 0s 0 0 0.00000 0 140 - 0.00000 - - 0s 0 0 0.00000 0 130 - 0.00000 - - 0s 0 0 0.00000 0 175 - 0.00000 - - 0s 0 0 0.00000 0 175 - 0.00000 - - 0s 0 2 0.00000 0 161 - 0.00000 - - 0s Cutting planes: Zero half: 34 Explored 3 nodes (7098 simplex iterations) in 0.43 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 4