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add cube mode

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2017-09-24 10:53:57 -07:00
commit ae9a6664d4
144 changed files with 6012 additions and 3174 deletions
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14
src/sat/sat_lookahead.h
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@ -84,6 +84,8 @@ namespace sat {
unsigned m_dl_max_iterations;
unsigned m_tc1_limit;
reward_t m_reward_type;
unsigned m_cube_cutoff;
double m_cube_fraction;
config() {
m_max_hlevel = 50;
@ -95,6 +97,8 @@ namespace sat {
m_dl_max_iterations = 32;
m_tc1_limit = 10000000;
m_reward_type = ternary_reward;
m_cube_cutoff = 0;
m_cube_fraction = 0.4;
}
};
@ -446,6 +450,8 @@ namespace sat {
std::ostream& display_clauses(std::ostream& out) const;
std::ostream& display_values(std::ostream& out) const;
std::ostream& display_lookahead(std::ostream& out) const;
std::ostream& display_cube(std::ostream& out) const;
void init_search();
void checkpoint();
@ -474,6 +480,14 @@ namespace sat {
return search();
}
/**
\brief create cubes to std-out in DIMACS form.
The cubes are controlled using cut-depth and cut-fraction parameters.
If cut-depth != 0, then it is used to control the depth of cuts.
Otherwise, cut-fraction gives an adaptive threshold for creating cuts.
*/
void cube();
literal select_lookahead(literal_vector const& assumptions, bool_var_vector const& vars);
/**
\brief simplify set of clauses by extracting units from a lookahead at base level.