Subtraction between pointers gives integer.

src/plugins/e-acsl/doc/Changelog

src/plugins/e-acsl/tests/bts/bts2386.c

src/plugins/e-acsl/tests/bts/oracle/bts2386.0.res.oracle

src/plugins/e-acsl/tests/bts/oracle/bts2386.1.res.oracle

src/plugins/e-acsl/tests/bts/oracle/bts2386.2.res.oracle

src/plugins/e-acsl/tests/bts/oracle/gen_bts2386.c

src/plugins/e-acsl/tests/bts/oracle/gen_bts2386_2.c

src/plugins/e-acsl/tests/bts/oracle/gen_bts2386_3.c

src/plugins/e-acsl/translate.ml