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| author | Andrew Reynolds <andrew.j.reynolds@gmail.com> | 2020-02-03 10:19:44 -0600 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2020-02-03 10:19:44 -0600 |
| commit | 5b010143cce0cace27e2556e26221f69ae43f688 (patch) | |
| tree | 40c67ef477bd2b6fa48b57ad55890d8da088ac17 | |
| parent | 1cec37904f1d770d7756d5661ff9b86fbca6d7ac (diff) | |
Fix invariant template inference for trivially infeasible conjecture (#3693)
| -rw-r--r-- | src/theory/quantifiers/sygus/ce_guided_single_inv.cpp | 7 | ||||
| -rw-r--r-- | test/regress/CMakeLists.txt | 1 | ||||
| -rw-r--r-- | test/regress/regress0/sygus/pbe-pred-contra.sy | 7 |
3 files changed, 14 insertions, 1 deletions
diff --git a/src/theory/quantifiers/sygus/ce_guided_single_inv.cpp b/src/theory/quantifiers/sygus/ce_guided_single_inv.cpp index 0e7606276..f81d2455c 100644 --- a/src/theory/quantifiers/sygus/ce_guided_single_inv.cpp +++ b/src/theory/quantifiers/sygus/ce_guided_single_inv.cpp @@ -163,7 +163,12 @@ void CegSingleInv::initialize(Node q) std::vector<Node> sivars; d_sip->getSingleInvocationVariables(sivars); Node invariant = d_sip->getFunctionInvocationFor(prog); - Assert(!invariant.isNull()); + if (invariant.isNull()) + { + // the conjecture did not have an instance of the invariant + // (e.g. it is trivially true/false). + return; + } invariant = invariant.substitute(sivars.begin(), sivars.end(), prog_templ_vars.begin(), diff --git a/test/regress/CMakeLists.txt b/test/regress/CMakeLists.txt index 3bcdec380..cea7b60ad 100644 --- a/test/regress/CMakeLists.txt +++ b/test/regress/CMakeLists.txt @@ -948,6 +948,7 @@ set(regress_0_tests regress0/sygus/no-syntax-test.sy regress0/sygus/parity-AIG-d0.sy regress0/sygus/parse-bv-let.sy + regress0/sygus/pbe-pred-contra.sy regress0/sygus/pLTL-sygus-syntax-err.sy regress0/sygus/real-si-all.sy regress0/sygus/sygus-no-wf.sy diff --git a/test/regress/regress0/sygus/pbe-pred-contra.sy b/test/regress/regress0/sygus/pbe-pred-contra.sy new file mode 100644 index 000000000..22fc12e60 --- /dev/null +++ b/test/regress/regress0/sygus/pbe-pred-contra.sy @@ -0,0 +1,7 @@ +; COMMAND_LINE: --cegqi-si=none --sygus-out=status +; EXPECT: unknown +(set-logic LIA) +(synth-fun P ((x Int)) Bool) +(constraint (P 54)) +(constraint (not (P 54))) +(check-synth) |