big update of the forgotten

spark/witness_seed.gpr

@@ -0,0 +1,14 @@
+project Witness_Seed is
+   for Source_Dirs use ("src");
+   for Object_Dir use "obj";
+   for Exec_Dir use ".";
+   for Main use ("main.adb");
+
+   package Compiler is
+      for Default_Switches ("Ada") use ("-gnat2012", "-gnatwa", "-gnatX");
+   end Compiler;
+
+   package Prove is
+      for Proof_Switches ("Ada") use ("--level=4", "--mode=prove");
+   end Prove;
+end Witness_Seed;