What does it mean in the output log in scip?

Question

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What does it mean in the output log in scip? Why some lines output node 1?

By using the command display display, I have already known the meaning of the parameters but I didn't know why is the node parameter 1 on the first few lines.

Answer 1

You get a lot of lines at the root node, since a new line is printed

a) every time a heuristic finds a new incumbent (new best solution) b) cuts are added, improving the dual bound