update Case refinement rule

refining.tex

@@ -100,9 +100,9 @@ binders):\svvspace{-1.5mm}
 \svvspace{-2.3mm}\\        
 \Infer[Case]
       {\Gamma\vdash e\triangleright\psi_\circ\\
-         \Gamma \evdash e t \Gamma_1\\  \Gamma_1\vdash e_1\triangleright\psi_1\\
-        \Gamma \evdash e {\neg t} \Gamma_2 \\ \Gamma_2\vdash e_2\triangleright\psi_2}
-      {\Gamma\vdash \ifty{e}{t}{e_1}{e_2}\triangleright\psi_\circ\cup\psi_1\cup\psi_2}
+        \Gamma \evdash e t \Gamma_1\\ \Gamma_1\vdash e\triangleright\psi_1\\ \Gamma_1\vdash e_1\triangleright\psi_1'\\
+        \Gamma \evdash e {\neg t} \Gamma_2 \\ \Gamma_2\vdash e\triangleright\psi_2\\ \Gamma_2\vdash e_2\triangleright\psi_2'}
+      {\Gamma\vdash \ifty{e}{t}{e_1}{e_2}\triangleright\psi_\circ\cup\psi_1\cup\psi_1'\cup\psi_2\cup\psi_2'}
       {}\svvspace{-1.4mm}
 \end{mathpar}
 Where $\psi\setminus\{x\}$ is the function defined as $\psi$ but undefined on $x$ and $\psi_1\cup \psi_2$ denotes component-wise union%