tests/units_formal::test_power_isa_add_formal: formal proof actually starts, though it fails BMC

crates/cpu/tests/units_formal.rs

@@ -28,9 +28,7 @@ use std::num::NonZero;
 #[hdl_module]
 fn formal_harness(config: PhantomConst<CpuConfig>) {
     #[hdl]
-    let cd: ClockDomain = m.output();
+    let cd: ClockDomain = m.input();
-    connect(cd.clk, fayalite::formal::formal_global_clock());
-    connect(cd.rst, fayalite::formal::formal_reset().to_reset());
 
     #[hdl]
     let input: DecodeAndRunSingleInsnInput<
@@ -99,9 +97,21 @@ fn formal_harness(config: PhantomConst<CpuConfig>) {
 
 #[hdl_module]
 fn check_power_isa_add_formal(config: PhantomConst<CpuConfig>) {
+    #[hdl]
+    let clk: Clock = m.input();
+    #[hdl]
+    let cd = wire();
+    connect(
+        cd,
+        #[hdl]
+        ClockDomain {
+            clk,
+            rst: formal_reset().to_reset(),
+        },
+    );
     #[hdl]
     let harness = instance(formal_harness(config));
-    let cd = harness.cd;
+    connect(harness.cd, cd);
     #[hdl]
     let DecodeAndRunSingleInsnInput::<_, _> {
         decoder_input,
@@ -208,11 +218,11 @@ fn test_power_isa_add_formal() {
         vec![UnitConfig::new(UnitKind::AluBranch)],
         NonZero::new(20).unwrap(),
     ));
-    let dut = check_power_isa_add_formal(config);
+    let m = check_power_isa_add_formal(config);
     println!("starting assert formal");
     assert_formal(
         "test_power_isa_add_formal",
-        dut,
+        m,
         FormalMode::Prove,
         10,
         None,