current bounds on the number of colors: 0 -- 55 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:37:34 2012 Optimize a model with 19684 rows, 2212 columns and 60372 nonzeros Presolve time: 0.08s Presolved: 19684 rows, 2212 columns, 60372 nonzeros Variable types: 0 continuous, 2212 integer (2212 binary) Root relaxation: objective 0.000000e+00, 148 iterations, 0.02 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 (471 simplex iterations) in 0.14 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 Thu Dec 13 18:37:34 2012 Optimize a model with 9506 rows, 1442 columns and 29068 nonzeros Presolve time: 0.03s Presolved: 9506 rows, 1442 columns, 29068 nonzeros Variable types: 0 continuous, 1442 integer (1442 binary) Root relaxation: objective 0.000000e+00, 125 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 (999 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 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:37:35 2012 Optimize a model with 4417 rows, 1057 columns and 13416 nonzeros Presolve time: 0.01s Presolved: 4417 rows, 1057 columns, 13416 nonzeros Variable types: 0 continuous, 1057 integer (1057 binary) Root relaxation: objective 0.000000e+00, 112 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 70 - 0.00000 - - 0s 0 0 0.00000 0 62 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3509 simplex iterations) in 0.38 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: 6 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:37:35 2012 Optimize a model with 6598 rows, 1222 columns and 20124 nonzeros Presolve time: 0.02s Presolved: 6598 rows, 1222 columns, 20124 nonzeros Variable types: 0 continuous, 1222 integer (1222 binary) Root relaxation: objective 0.000000e+00, 126 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 44 - 0.00000 - - 0s 0 0 0.00000 0 72 - 0.00000 - - 0s 0 0 0.00000 0 170 - 0.00000 - - 0s 0 0 0.00000 0 223 - 0.00000 - - 1s 0 0 0.00000 0 124 - 0.00000 - - 1s 0 0 0.00000 0 143 - 0.00000 - - 2s 0 0 0.00000 0 116 - 0.00000 - - 3s 0 0 0.00000 0 120 - 0.00000 - - 4s 0 0 0.00000 0 122 - 0.00000 - - 4s 0 0 0.00000 0 139 - 0.00000 - - 5s 0 0 0.00000 0 137 - 0.00000 - - 5s 0 2 0.00000 0 137 - 0.00000 - - 6s 203 9 0.00000 12 158 - 0.00000 - 163 10s Cutting planes: Clique: 168 Zero half: 7 Explored 493 nodes (110459 simplex iterations) in 13.90 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: 9 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:37:49 2012 Optimize a model with 8052 rows, 1332 columns and 24596 nonzeros Presolve time: 0.02s Presolved: 8052 rows, 1332 columns, 24596 nonzeros Variable types: 0 continuous, 1332 integer (1332 binary) Root relaxation: objective 0.000000e+00, 124 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 21 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1767 simplex iterations) in 0.15 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: 9 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:37:49 2012 Optimize a model with 7325 rows, 1277 columns and 22360 nonzeros Presolve time: 0.02s Presolved: 7325 rows, 1277 columns, 22360 nonzeros Variable types: 0 continuous, 1277 integer (1277 binary) Root relaxation: objective 0.000000e+00, 126 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 46 - 0.00000 - - 0s 0 0 0.00000 0 46 - 0.00000 - - 0s 0 0 0.00000 0 71 - 0.00000 - - 0s 0 0 0.00000 0 178 - 0.00000 - - 0s 0 0 0.00000 0 55 - 0.00000 - - 1s 0 0 0.00000 0 118 - 0.00000 - - 1s 0 0 0.00000 0 41 - 0.00000 - - 2s 0 0 0.00000 0 114 - 0.00000 - - 2s 0 0 0.00000 0 110 - 0.00000 - - 3s 0 0 0.00000 0 95 - 0.00000 - - 3s 0 0 0.00000 0 111 - 0.00000 - - 4s 0 0 0.00000 0 118 - 0.00000 - - 4s 0 0 0.00000 0 117 - 0.00000 - - 5s 0 2 0.00000 0 117 - 0.00000 - - 5s H 8 3 0.0000000 0.00000 0.0% 254 6s Cutting planes: Clique: 33 Zero half: 6 Explored 8 nodes (39875 simplex iterations) in 6.09 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% optimal solution found: number of colors: 10