diff --git a/Dockerfile b/Dockerfile
deleted file mode 100644
index 7256bcc2..00000000
--- a/Dockerfile
+++ /dev/null
@@ -1,66 +0,0 @@
-FROM centos:centos7 AS base-dependencies
-LABEL author="James Cherry"
-LABEL maintainer="James Cherry <cherry@parallaxsw.com>"
-
-# Install dev and runtime dependencies
-RUN yum group install -y "Development Tools" \
-    && yum install -y https://repo.ius.io/ius-release-el7.rpm \
-    && yum install -y centos-release-scl \
-    && yum install -y wget devtoolset-8 \
-    && yum install -y qt5-qtbase-devel \
-    devtoolset-8-libatomic-devel tcl-devel tcl tk libstdc++ tk-devel pcre-devel \
-    python36u python36u-libs python36u-devel python36u-pip && \
-    yum clean -y all && \
-    rm -rf /var/lib/apt/lists/*
-
-ENV CC=/opt/rh/devtoolset-8/root/usr/bin/gcc \
-    CPP=/opt/rh/devtoolset-8/root/usr/bin/cpp \
-    CXX=/opt/rh/devtoolset-8/root/usr/bin/g++ \
-    PATH=/opt/rh/devtoolset-8/root/usr/bin:$PATH \
-    LD_LIBRARY_PATH=/opt/rh/devtoolset-8/root/usr/lib64:/opt/rh/devtoolset-8/root/usr/lib:/opt/rh/devtoolset-8/root/usr/lib64/dyninst:/opt/rh/devtoolset-8/root/usr/lib/dyninst:/opt/rh/devtoolset-8/root/usr/lib64:/opt/rh/devtoolset-8/root/usr/lib:$LD_LIBRARY_PATH
-
-# Install CMake
-RUN wget https://cmake.org/files/v3.14/cmake-3.14.0-Linux-x86_64.sh && \
-    chmod +x cmake-3.14.0-Linux-x86_64.sh  && \
-    ./cmake-3.14.0-Linux-x86_64.sh --skip-license --prefix=/usr/local && rm -rf cmake-3.14.0-Linux-x86_64.sh \
-    && yum clean -y all
-
-# Install any git version > 2.6.5
-RUN yum remove -y git* && yum install -y rh-git227
-RUN rm -f /usr/bin/git; ln -s /opt/rh/rh-git227/root/bin/git /usr/bin/git
-
-# Install SWIG
-RUN yum remove -y swig \
-    && wget https://github.com/swig/swig/archive/rel-4.0.1.tar.gz \
-    && tar xfz rel-4.0.1.tar.gz \
-    && rm -rf rel-4.0.1.tar.gz \
-    && cd swig-rel-4.0.1 \
-    && ./autogen.sh && ./configure --prefix=/usr && make -j $(nproc) && make install \
-    && cd .. \
-    && rm -rf swig-rel-4.0.1
-
-# download CUDD
-# RUN wget https://www.davidkebo.com/source/cudd_versions/cudd-3.0.0.tar.gz && \
-#     tar -xvf cudd-3.0.0.tar.gz && \
-#     rm cudd-3.0.0.tar.gz
-
-# install CUDD
-# RUN cd cudd-3.0.0 && \
-#     mkdir ../cudd && \
-#     ./configure --prefix=$HOME/cudd && \
-#     make && \
-#     make install
-
-
-FROM base-dependencies AS builder
-
-COPY . /OpenSTA
-WORKDIR /OpenSTA
-
-# Build
-RUN mkdir build
-#RUN cd buld && cmake .. -DCUDD=$HOME/cudd && make -j 8
-RUN cd build && cmake .. && make -j 8
-
-# Run sta on entry
-ENTRYPOINT ["OpenSTA/app/sta"]
diff --git a/Dockerfile.centos7 b/Dockerfile.centos7
new file mode 100644
index 00000000..d32467a0
--- /dev/null
+++ b/Dockerfile.centos7
@@ -0,0 +1,40 @@
+FROM centos:centos7 AS base-dependencies
+LABEL author="James Cherry"
+LABEL maintainer="James Cherry <cherry@parallaxsw.com>"
+
+# Install dev and runtime dependencies
+RUN sed -i s/mirror.centos.org/vault.centos.org/g /etc/yum.repos.d/*.repo \
+    && sed -i s/^#.*baseurl=http/baseurl=http/g /etc/yum.repos.d/*.repo \
+    && sed -i s/^mirrorlist=http/#mirrorlist=http/g /etc/yum.repos.d/*.repo \
+    && yum update -y \
+    && yum install -y centos-release-scl epel-release
+RUN sed -i s/mirror.centos.org/vault.centos.org/g /etc/yum.repos.d/*.repo \
+    && sed -i s/^#.*baseurl=http/baseurl=http/g /etc/yum.repos.d/*.repo \
+    && sed -i s/^mirrorlist=http/#mirrorlist=http/g /etc/yum.repos.d/*.repo \ 
+    && yum install -y devtoolset-8 wget cmake3 make eigen3-devel tcl-devel tcl-tclreadline-devel swig3 bison flex zlib-devel \
+    && yum clean -y all
+
+# Download CUDD
+RUN wget https://raw.githubusercontent.com/davidkebo/cudd/main/cudd_versions/cudd-3.0.0.tar.gz && \
+    tar -xvf cudd-3.0.0.tar.gz && \
+    rm cudd-3.0.0.tar.gz
+
+# Install CUDD
+RUN source /opt/rh/devtoolset-8/enable && \
+    cd cudd-3.0.0 && \
+    mkdir ../cudd && \
+    ./configure && \
+    make -j`nproc` && \
+    make install
+
+FROM base-dependencies AS builder
+
+COPY . /OpenSTA
+WORKDIR /OpenSTA
+
+# Build
+RUN rm -rf build && mkdir build
+RUN source /opt/rh/devtoolset-8/enable && cd build && cmake3 .. && make -j`nproc`
+
+# Run sta on entry
+ENTRYPOINT ["OpenSTA/app/sta"]
diff --git a/include/sta/Search.hh b/include/sta/Search.hh
index 29f07c57..cef24b4b 100644
--- a/include/sta/Search.hh
+++ b/include/sta/Search.hh
@@ -156,6 +156,18 @@ public:
 
   PathGroup *pathGroup(const PathEnd *path_end) const;
   void deletePathGroups();
+  void makePathGroups(int group_count,
+                      int endpoint_count,
+                      bool unique_pins,
+                      float min_slack,
+                      float max_slack,
+                      PathGroupNameSet *group_names,
+                      bool setup,
+                      bool hold,
+                      bool recovery,
+                      bool removal,
+                      bool clk_gating_setup,
+                      bool clk_gating_hold);
   virtual ExceptionPath *exceptionTo(ExceptionPathType type,
 				     const Path *path,
 				     const Pin *pin,
diff --git a/liberty/LibertyBuilder.cc b/liberty/LibertyBuilder.cc
index 1b353ebf..9b52db9f 100644
--- a/liberty/LibertyBuilder.cc
+++ b/liberty/LibertyBuilder.cc
@@ -678,6 +678,8 @@ LibertyBuilder::makeMinPulseWidthArcs(LibertyCell *cell,
                                       TimingRole *role,
                                       TimingArcAttrsPtr attrs)
 {
+  if (from_port == nullptr)
+    from_port = to_port;
   TimingArcSet *arc_set = makeTimingArcSet(cell, from_port, to_port, related_out,
                                            role, attrs);
   for (auto to_rf : RiseFall::range()) {
diff --git a/liberty/LibertyReader.cc b/liberty/LibertyReader.cc
index d8064180..72749377 100644
--- a/liberty/LibertyReader.cc
+++ b/liberty/LibertyReader.cc
@@ -4119,7 +4119,8 @@ LibertyReader::endTiming(LibertyGroup *group)
     }
     TimingType timing_type = timing_->attrs()->timingType();
     if (timing_->relatedPortNames() == nullptr
-        && !(timing_type == TimingType::min_clock_tree_path
+        && !(timing_type == TimingType::min_pulse_width
+             || timing_type == TimingType::min_clock_tree_path
              || timing_type == TimingType::max_clock_tree_path))
       libWarn(1243, group, "timing group missing related_pin/related_bus_pin.");
   }
diff --git a/search/Bdd.cc b/search/Bdd.cc
index 43e55adc..a2598c15 100644
--- a/search/Bdd.cc
+++ b/search/Bdd.cc
@@ -115,9 +115,9 @@ Bdd::ensureNode(const LibertyPort *port)
   auto port_var = bdd_port_var_map_.find(port);
   DdNode *node = nullptr;
   if (port_var == bdd_port_var_map_.end()) {
-    node = Cudd_bddNewVar(cudd_mgr_);
+    unsigned var_index = bdd_port_var_map_.size();
+    node = Cudd_bddIthVar(cudd_mgr_, var_index);
     bdd_port_var_map_[port] = node;
-    unsigned var_index = Cudd_NodeReadIndex(node);
     bdd_var_idx_port_map_[var_index] = port;
     Cudd_Ref(node);
   }
@@ -149,8 +149,6 @@ Bdd::varIndexPort(int var_index)
 void
 Bdd::clearVarMap()
 {
-  for (const auto [port, var_node] : bdd_port_var_map_)
-    Cudd_RecursiveDeref(cudd_mgr_, var_node);
   bdd_port_var_map_.clear();
   bdd_var_idx_port_map_.clear();
 }