
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
In a field, there are two fir trees that grow 20 meters apart from each other, each with a height of 30 meters. The branches of the fir trees grow very densely, and among them are branches that grow exactly towards each other. The length of each branch is half the distance from it to the top of the tree. A spider can crawl vertically up or down the trunk, horizontally along the branches, or descend vertically down along its web from one branch to another. What is the minimum distance the spider has to crawl to get from the top of one tree to the top of the other?

Present the answer in LaTex format: \boxed{Your answer}
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