[tests] simplifying output of tests

src/plugins/e-acsl/tests/bts/oracle/bts1304.0.res.oracle

src/plugins/e-acsl/tests/bts/oracle/bts1304.1.res.oracle

src/plugins/e-acsl/tests/bts/oracle/bts1307.0.res.oracle

src/plugins/e-acsl/tests/bts/oracle/bts1307.1.res.oracle

src/plugins/e-acsl/tests/bts/oracle/bts1324.0.res.oracle

src/plugins/e-acsl/tests/bts/oracle/bts1324.1.res.oracle

src/plugins/e-acsl/tests/bts/oracle/bts1326.0.res.oracle

src/plugins/e-acsl/tests/bts/oracle/bts1326.1.res.oracle

src/plugins/e-acsl/tests/bts/oracle/bts1390.0.res.oracle

src/plugins/e-acsl/tests/bts/oracle/bts1390.1.res.oracle

src/plugins/e-acsl/tests/bts/oracle/bts1398.0.res.oracle

src/plugins/e-acsl/tests/bts/oracle/bts1398.1.res.oracle

src/plugins/e-acsl/tests/bts/oracle/bts1399.0.res.oracle

src/plugins/e-acsl/tests/bts/oracle/bts1399.1.res.oracle

src/plugins/e-acsl/tests/bts/oracle/bts1478.0.res.oracle

src/plugins/e-acsl/tests/bts/oracle/bts1478.1.res.oracle

src/plugins/e-acsl/tests/bts/oracle/bts1700.0.res.oracle

src/plugins/e-acsl/tests/bts/oracle/bts1700.1.res.oracle

src/plugins/e-acsl/tests/bts/oracle/bts1717.0.res.oracle

src/plugins/e-acsl/tests/bts/oracle/bts1717.1.res.oracle