current bounds on the number of colors: 0 -- 187 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 03:46:14 2012 Optimize a model with 81097 rows, 18261 columns and 260121 nonzeros Presolve time: 0.26s Presolved: 81097 rows, 18261 columns, 260121 nonzeros Variable types: 0 continuous, 18261 integer (18261 binary) Root relaxation: objective 0.000000e+00, 745 iterations, 0.08 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 (1202 simplex iterations) in 0.46 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 -- 93 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 03:46:15 2012 Optimize a model with 40207 rows, 9472 columns and 128662 nonzeros Presolve time: 0.16s Presolved: 40207 rows, 9472 columns, 128662 nonzeros Variable types: 0 continuous, 9472 integer (9472 binary) Root relaxation: objective 0.000000e+00, 682 iterations, 0.04 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 (1125 simplex iterations) in 0.26 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 -- 46 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 03:46:16 2012 Optimize a model with 20197 rows, 5171 columns and 64331 nonzeros Presolve time: 0.08s Presolved: 20197 rows, 5171 columns, 64331 nonzeros Variable types: 0 continuous, 5171 integer (5171 binary) Root relaxation: objective 0.000000e+00, 416 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 (772 simplex iterations) in 0.12 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 -- 23 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 03:46:16 2012 Optimize a model with 9757 rows, 2927 columns and 30767 nonzeros Presolve time: 0.03s Presolved: 9757 rows, 2927 columns, 30767 nonzeros Variable types: 0 continuous, 2927 integer (2927 binary) Root relaxation: objective 0.000000e+00, 395 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 (874 simplex iterations) in 0.06 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 -- 11 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 03:46:16 2012 Optimize a model with 4537 rows, 1805 columns and 13985 nonzeros Presolve time: 0.01s Presolved: 4537 rows, 1805 columns, 13985 nonzeros Variable types: 0 continuous, 1805 integer (1805 binary) Root relaxation: objective 0.000000e+00, 418 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 0 172 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (3891 simplex iterations) in 0.27 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 -- 5 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 03:46:17 2012 Optimize a model with 1927 rows, 1244 columns and 5594 nonzeros Presolve removed 187 rows and 187 columns Presolve time: 0.00s Presolved: 1740 rows, 1057 columns, 5220 nonzeros Variable types: 0 continuous, 1057 integer (1057 binary) Root relaxation: objective 0.000000e+00, 200 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 0 187 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (812 simplex iterations) in 0.02 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 -- 5 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 03:46:17 2012 Optimize a model with 2797 rows, 1431 columns and 8391 nonzeros Presolve time: 0.01s Presolved: 2797 rows, 1431 columns, 8391 nonzeros Variable types: 0 continuous, 1431 integer (1431 binary) Root relaxation: objective 0.000000e+00, 410 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 0 366 - 0.00000 - - 0s 0 0 0.00000 0 364 - 0.00000 - - 0s 0 0 0.00000 0 494 - 0.00000 - - 0s 0 0 0.00000 0 515 - 0.00000 - - 1s 0 0 0.00000 0 499 - 0.00000 - - 1s 0 0 0.00000 0 493 - 0.00000 - - 2s 0 0 infeasible 0 - 0.10000 - - 2s Cutting planes: Clique: 1 Zero half: 1031 Explored 0 nodes (16439 simplex iterations) in 2.92 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: 3 -- 5 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 03:46:20 2012 Optimize a model with 3667 rows, 1618 columns and 11188 nonzeros Presolve time: 0.01s Presolved: 3667 rows, 1618 columns, 11188 nonzeros Variable types: 0 continuous, 1618 integer (1618 binary) Root relaxation: objective 0.000000e+00, 401 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 0 344 - 0.00000 - - 0s 0 0 0.00000 0 350 - 0.00000 - - 0s 0 0 0.00000 0 346 - 0.00000 - - 0s 0 0 0.00000 0 410 - 0.00000 - - 0s 0 0 0.00000 0 318 - 0.00000 - - 1s 0 0 0.00000 0 318 - 0.00000 - - 1s 0 0 0.00000 0 304 - 0.00000 - - 2s 0 0 0.00000 0 302 - 0.00000 - - 2s 0 0 0.00000 0 306 - 0.00000 - - 3s 0 0 0.00000 0 300 - 0.00000 - - 3s 0 0 0.00000 0 288 - 0.00000 - - 4s 0 0 0.00000 0 278 - 0.00000 - - 4s 0 0 0.00000 0 258 - 0.00000 - - 5s 0 0 0.00000 0 246 - 0.00000 - - 5s 0 0 0.00000 0 250 - 0.00000 - - 5s 0 0 0.00000 0 274 - 0.00000 - - 6s 0 0 0.00000 0 273 - 0.00000 - - 6s 0 2 0.00000 0 273 - 0.00000 - - 6s 427 39 0.00000 20 296 - 0.00000 - 129 10s 805 51 0.00000 11 318 - 0.00000 - 117 15s 809 53 0.00000 12 315 - 0.00000 - 117 20s 813 56 0.00000 20 306 - 0.00000 - 116 25s 939 48 infeasible 25 - 0.00000 - 188 30s 1234 46 infeasible 22 - 0.00000 - 199 35s 1563 43 infeasible 23 - 0.00000 - 206 40s 1842 46 0.00000 22 396 - 0.00000 - 211 45s 2099 49 infeasible 22 - 0.00000 - 216 50s 2394 56 infeasible 27 - 0.00000 - 218 55s 2686 56 infeasible 26 - 0.00000 - 221 60s 2975 47 infeasible 21 - 0.00000 - 223 65s 3230 42 infeasible 21 - 0.00000 - 226 70s 3534 38 0.00000 25 340 - 0.00000 - 226 75s 3800 16 infeasible 21 - 0.00000 - 227 80s Cutting planes: Gomory: 3 Zero half: 10 Explored 3911 nodes (953092 simplex iterations) in 82.46 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 5