\hspace{-0.09cm}\scalebox{0.85}{
	\begin{dplltabular}{5}
		\dpllStep{12|13|14|15|16}
		\dpllDecL{0|0|0|0|0}
		\dpllAssi{ - |$a$|$a, \lnot e$|$a, \lnot e, b$|\makecell{$a, \lnot e, b, $ \\ $\lnot d$}}
		\dpllClause{1}{$\lnot b, d, e$}{$\lnot b, d, e$|$\lnot b, d, e$|$\lnot b, d$|$d$|\conflict}
		\dpllClause{2}{$b, e$}{$b, e$|$b, e$|$b$|\done|\done}
		\dpllClause{3}{$c, d$}{$c, d$|$c, d$|$c, d$|$c, d$|$c$}
		\dpllClause{4}{$\lnot a, \lnot e$}{$\lnot a, \lnot e$|$\lnot e$|\done|\done|\done}
		\dpllClause{5}{$a, \lnot c, \lnot e$}{$a, \lnot c, \lnot e$|\done|\done|\done|\done}
		\dpllClause{6}{$c, \lnot d$}{$c, \lnot d$|$c, \lnot d$|$c, \lnot d$|$c, \lnot d$|\done}
		\dpllClause{7}{$\lnot b, \lnot d$}{$\lnot b, \lnot d$|$\lnot b, \lnot d$|$\lnot b, \lnot d$|$\lnot d$|\done}
		\dpllClause{8}{$a, b$}{$a, b$|\done|\done|\done|\done}
		\dpllClause{9}{$a$}{$a$|\done|\done|\done|\done}
		\dpllBCP{$a$|$\lnot e$|$b$|$\lnot d$| - }
		\dpllPL{ - | - | - | - | - }
		\dpllDeci{ - | - | - | - |UNSAT}
	\end{dplltabular}
}

Conflict in step 16\\
\scalebox{0.75}{

\begin{tikzpicture}[>=latex,line join=bevel,]
  \pgfsetlinewidth{1bp}
%%
\pgfsetcolor{black}
  % Edge: 0 -> 6
  \draw [->] (1.0536bp,56.0bp) .. controls (2.5071bp,56.0bp) and (33.188bp,56.0bp)  .. (64.696bp,56.0bp);
  \definecolor{strokecol}{rgb}{0.0,0.0,0.0};
  \pgfsetstrokecolor{strokecol}
  \draw (33.0bp,63.5bp) node {$$9$$};
  % Edge: 2 -> 1
  \draw [->] (350.67bp,47.438bp) .. controls (358.41bp,44.585bp) and (369.51bp,40.495bp)  .. (388.47bp,33.51bp);
  % Edge: 3 -> 2
  \draw [->] (261.98bp,34.18bp) .. controls (275.88bp,37.215bp) and (301.36bp,42.779bp)  .. (329.14bp,48.846bp);
  \draw (297.0bp,51.5bp) node {$$1$$};
  % Edge: 3 -> 5
  \draw [->] (261.33bp,27.798bp) .. controls (267.39bp,25.214bp) and (275.54bp,22.021bp)  .. (283.0bp,20.0bp) .. controls (294.71bp,16.83bp) and (308.12bp,14.627bp)  .. (328.95bp,11.971bp);
  \draw (297.0bp,27.5bp) node {$$7$$};
  % Edge: 4 -> 2
  \draw [->] (172.41bp,59.835bp) .. controls (177.76bp,61.808bp) and (184.64bp,64.004bp)  .. (191.0bp,65.0bp) .. controls (214.93bp,68.751bp) and (267.64bp,72.391bp)  .. (311.0bp,63.0bp) .. controls (314.2bp,62.306bp) and (317.5bp,61.244bp)  .. (329.96bp,55.925bp);
  \draw (251.0bp,75.5bp) node {$$1$$};
  % Edge: 4 -> 3
  \draw [->] (172.98bp,53.247bp) .. controls (186.94bp,49.395bp) and (212.6bp,42.318bp)  .. (240.14bp,34.721bp);
  \draw (205.0bp,55.5bp) node {$$2$$};
  % Edge: 5 -> 1
  \draw [->] (350.67bp,14.223bp) .. controls (358.24bp,16.746bp) and (369.02bp,20.339bp)  .. (388.09bp,26.697bp);
  % Edge: 6 -> 4
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  \draw (119.0bp,63.5bp) node {$$4$$};
  % Node: 6
\begin{scope}
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  \pgfsetstrokecolor{strokecol}
  \draw (76.0bp,56.0bp) ellipse (11.0bp and 11.0bp);
  \draw (76.0bp,56.0bp) node {$a$};
\end{scope}
  % Node: 1
\begin{scope}
  \definecolor{strokecol}{rgb}{0.0,0.0,0.0};
  \pgfsetstrokecolor{strokecol}
  \draw (399.0bp,30.0bp) ellipse (11.0bp and 11.0bp);
  \draw (399.0bp,30.0bp) node {$\bot$};
\end{scope}
  % Node: 2
\begin{scope}
  \definecolor{strokecol}{rgb}{0.0,0.0,0.0};
  \pgfsetstrokecolor{strokecol}
  \draw (340.0bp,51.0bp) ellipse (11.0bp and 11.0bp);
  \draw (340.0bp,51.0bp) node {$d$};
\end{scope}
  % Node: 3
\begin{scope}
  \definecolor{strokecol}{rgb}{0.0,0.0,0.0};
  \pgfsetstrokecolor{strokecol}
  \draw (251.0bp,32.0bp) ellipse (11.0bp and 11.0bp);
  \draw (251.0bp,32.0bp) node {$b$};
\end{scope}
  % Node: 5
\begin{scope}
  \definecolor{strokecol}{rgb}{0.0,0.0,0.0};
  \pgfsetstrokecolor{strokecol}
  \draw (340.0bp,11.0bp) ellipse (11.0bp and 11.0bp);
  \draw (340.0bp,11.0bp) node {$\lnot d$};
\end{scope}
  % Node: 4
\begin{scope}
  \definecolor{strokecol}{rgb}{0.0,0.0,0.0};
  \pgfsetstrokecolor{strokecol}
  \draw (162.0bp,56.0bp) ellipse (11.0bp and 11.0bp);
  \draw (162.0bp,56.0bp) node {$\lnot e$};
\end{scope}
%
\end{tikzpicture}


}
\begin{prooftree}
	\AxiomC{$1. \; \lnot b \lor d \lor e$}
	\AxiomC{$7. \; \lnot b \lor \lnot d$}
	\BinaryInfC{$\lnot b \lor e$}
	\AxiomC{$2. \; b \lor e$}
	\BinaryInfC{$e$}
	\AxiomC{$4. \; \lnot a \lor \lnot e$}
	\BinaryInfC{$\lnot a$}
	\AxiomC{$9. \; a$}
	\BinaryInfC{$\bot$}
\end{prooftree}