
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]


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A function $f(x)$ defined on $\mathbb{R}$ is odd, and its derivative satisfies $f′(x) < f(x)$. Additionally, $f(x) \cdot f(x+3)=-1$. If $f(2015)=-e$, find the solution set of the inequality $f(x) < e^{x}$.

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