This is pdfTeX, Version 3.14159265-2.6-1.40.16 (TeX Live 2015/Debian) (preloaded format=pdflatex 2016.5.31)  20 JUN 2016 22:12
entering extended mode
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**main.tex

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Here is how much of TeX's memory you used:
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 3640 words of font info for 14 fonts, out of 8000000 for 9000
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!  ==> Fatal error occurred, no output PDF file produced!