Spacer engine for HORN logic

The algorithms implemented in the engine are described in the following papers

Anvesh Komuravelli, Nikolaj Bjørner, Arie Gurfinkel, Kenneth L. McMillan:
Compositional Verification of Procedural Programs using Horn Clauses over Integers and Arrays. FMCAD 2015: 89-96

Nikolaj Bjørner, Arie Gurfinkel:
Property Directed Polyhedral Abstraction. VMCAI 2015: 263-281

Anvesh Komuravelli, Arie Gurfinkel, Sagar Chaki:
SMT-Based Model Checking for Recursive Programs. CAV 2014: 17-34

src/muz/spacer/CMakeLists.txt

@@ -0,0 +1,33 @@
+z3_add_component(spacer
+  SOURCES
+  spacer_legacy_mev.cpp
+  spacer_legacy_frames.cpp
+  spacer_context.cpp
+  spacer_dl_interface.cpp
+  spacer_farkas_learner.cpp
+  spacer_generalizers.cpp
+  spacer_manager.cpp
+  spacer_marshal.cpp
+  spacer_prop_solver.cpp
+  spacer_smt_context_manager.cpp
+  spacer_sym_mux.cpp
+  spacer_util.cpp
+  spacer_itp_solver.cpp
+  spacer_virtual_solver.cpp
+  spacer_legacy_mbp.cpp
+  spacer_proof_utils.cpp
+  spacer_unsat_core_learner.cpp
+  spacer_unsat_core_plugin.cpp
+  spacer_matrix.cpp
+  spacer_min_cut.cpp
+  spacer_antiunify.cpp
+  spacer_mev_array.cpp
+  spacer_qe_project.cpp
+  COMPONENT_DEPENDENCIES
+  arith_tactics
+  core_tactics
+  muz
+  qe
+  smt_tactic
+  transforms
+  )