Thread1 startRead
Thread2 startRead
Thread1 stopRead
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Thread3 startWrite
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Thread4 startWrite
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Thread1 startRead
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Thread1 startRead
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Thread3 startWrite
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Thread2 startRead
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Thread1 startRead
Thread1 stopRead
Thread4 startWrite
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Thread3 startWrite
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Thread1 startRead
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Thread2 startRead
Thread2 stopRead
Thread1 startRead
Thread1 stopRead
Thread3 startWrite
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Thread1 startRead
Thread1 stopRead
Thread4 startWrite
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Thread1 startRead
Thread2 startRead
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Thread3 startWrite
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Thread1 startRead
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Thread1 startRead
Thread1 stopRead
Thread3 startWrite
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Thread2 startRead
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Thread4 startWrite
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Thread3 startWrite
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Thread2 startRead
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Thread3 startWrite
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Thread4 startWrite
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Thread3 startWrite
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Thread2 startRead
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Thread2 startRead
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Thread4 startWrite
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Thread2 startRead
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Thread2 startRead
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Thread4 startWrite
Thread4 stopWrite
Thread4 startWrite
Thread4 stopWrite
Thread4 startWrite
Thread4 stopWrite
