picosat-913

LICENSE

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+Copyright (c) 2006 - 2009, Armin Biere, Johannes Kepler University.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to
+deal in the Software without restriction, including without limitation the
+rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+sell copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+IN THE SOFTWARE.
+

NEWS

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+news for release 91x since 846
+------------------------------
+
+* propagation of binary clauses until completion
+
+* fixed API usage 'assume;sat;sat'
+
+* literals move to front (LMTF) during traversal of visited clauses
+
+* switched from inner/outer to Luby style restart scheduling
+
+* less agressive reduce schedule
+
+* replaced watched literals with head and tail pointers
+
+* add 'picosat_failed_assumption', which allows to avoid tracing and core
+  generation, if one is only interested in assumptions in the core
+
+* fixed a BUG in the generic iterator code of clauses
+  (should rarely happen unless you use a very sophisticated malloc lib)
+
+news for release 846 since 632
+------------------------------
+
+* cleaned up assumption handling (actually removed buggy optimization)
+
+* incremental core generation 
+
+* experimental 'all different constraint' handling as in our FMCAD'08 paper
+
+* new API calls: 
+
+  - picosat_add_ado_lit       (add all different object literal)
+  - picosat_deref_top_level   (deref top level assignment)
+  - picosat_changed           (check whether extension was possible)
+  - picosat_measure_all_calls (per default do not measure adding time)
+  - picosat_set_prefix        (set prefix for messages)
+
+* 64 bit port (and compilation options)
+
+* optional NVSIDS visualization code
+
+* resource controlled failed literal implementation
+
+* disconnect long clauses satisfied at lower decision level
+
+* controlling restarts

README

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+These are the sources of the PicoSAT solver.
+The preprocessor is not included.
+To compile run './configure && make'.
+The API is document in 'picosat.h'.
+See also 'NEWS' and 'LICENSE'.

VERSION

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+913