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use a base iz3_exception class for exceptions raised during interpolation

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Using a base exception class, derived from z3_exception, makes it possible to
recover gracefully if something goes wrong during the computation of
interpolants.
This commit is contained in:
Alberto Griggio 2015-04-16 19:14:34 +02:00
parent af444beb2e
commit 8e772b428b
13 changed files with 109 additions and 57 deletions
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18
src/interp/iz3translate.cpp
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@ -132,7 +132,7 @@ public:
// if(range_is_empty(r))
range r = ast_scope(quanted);
if(range_is_empty(r))
throw "can't skolemize";
throw iz3_exception("can't skolemize");
if(frame == INT_MAX || !in_range(frame,r))
frame = range_max(r); // this is desperation -- may fail
if(frame >= frames) frame = frames - 1;
@ -1086,10 +1086,10 @@ public:
rational xcoeff = get_first_coefficient(arg(x,0),xvar);
rational ycoeff = get_first_coefficient(arg(y,0),yvar);
if(xcoeff == rational(0) || ycoeff == rational(0) || xvar != yvar)
throw "bad assign-bounds lemma";
throw iz3_exception("bad assign-bounds lemma");
rational ratio = xcoeff/ycoeff;
if(denominator(ratio) != rational(1))
throw "bad assign-bounds lemma";
throw iz3_exception("bad assign-bounds lemma");
return make_int(ratio); // better be integer!
}
@ -1098,7 +1098,7 @@ public:
get_assign_bounds_coeffs(proof,farkas_coeffs);
int nargs = num_args(con);
if(nargs != (int)(farkas_coeffs.size()))
throw "bad assign-bounds theory lemma";
throw iz3_exception("bad assign-bounds theory lemma");
#if 0
if(farkas_coeffs[0] != make_int(rational(1)))
farkas_coeffs[0] = make_int(rational(1));
@ -1139,7 +1139,7 @@ public:
get_assign_bounds_rule_coeffs(proof,farkas_coeffs);
int nargs = num_prems(proof)+1;
if(nargs != (int)(farkas_coeffs.size()))
throw "bad assign-bounds theory lemma";
throw iz3_exception("bad assign-bounds theory lemma");
#if 0
if(farkas_coeffs[0] != make_int(rational(1)))
farkas_coeffs[0] = make_int(rational(1));
@ -1415,7 +1415,7 @@ public:
std::vector<ast> vals = cvec;
if(!is_sat(cnstrs,new_proof,vals))
throw "Proof error!";
throw iz3_exception("Proof error!");
std::vector<rational> rat_farkas_coeffs;
for(unsigned i = 0; i < cvec.size(); i++){
ast bar = vals[i];
@ -1423,7 +1423,7 @@ public:
if(is_numeral(bar,r))
rat_farkas_coeffs.push_back(r);
else
throw "Proof error!";
throw iz3_exception("Proof error!");
}
rational the_lcd = lcd(rat_farkas_coeffs);
std::vector<ast> farkas_coeffs;
@ -1471,7 +1471,7 @@ public:
ast new_proof;
std::vector<ast> dummy;
if(is_sat(npcons,new_proof,dummy))
throw "Proof error!";
throw iz3_exception("Proof error!");
pfrule dk = pr(new_proof);
int nnp = num_prems(new_proof);
std::vector<Iproof::node> my_prems;
@ -1532,7 +1532,7 @@ public:
ast new_proof;
std::vector<ast> dummy;
if(is_sat(npcons,new_proof,dummy))
throw "Proof error!";
throw iz3_exception("Proof error!");
pfrule dk = pr(new_proof);
int nnp = num_prems(new_proof);
std::vector<Iproof::node> my_prems;