What does "Execution Tree" mean?

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An execution tree is a way to visualize how a program runs step by step. Each branch in the tree represents a different choice or path the program can take based on certain conditions or inputs. Think of it like a map that shows all the possible routes you could take during a journey, where each decision at a fork leads you down a different path.

When a program runs, it checks its conditions, makes decisions, and executes instructions. The execution tree helps to track these processes, showing how each choice affects the overall flow of the program. By following the branches, developers can see where a program may go and how different inputs can change its behavior.

Using this visual aid, developers can better analyze the program. It becomes easier to find errors or improve performance because they can see all possible situations that might occur during execution. This method is especially useful for checking how well a program covers its different paths and for ensuring it works as intended under various conditions.