
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
Given $\overrightarrow{a}=(2 \sqrt {3}\sin x,\sin x+\cos x)$ and $\overrightarrow{b}=(\cos x,\sin x-\cos x)$, let the function $f(x)= \overrightarrow{a}\cdot \overrightarrow{b}$.
- (Ⅰ) Find the interval of monotonic decrease for the function $f(x)$;
- (Ⅱ) In $\triangle ABC$, with the opposite sides of internal angles $A$, $B$, $C$ being $a$, $b$, $c$ respectively, and $\cos A= \frac {2b-a}{2c}$, if $f(A)-m > 0$ always holds, find the range of the real number $m$.

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