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131 lines
3.9 KiB
131 lines
3.9 KiB
//==============================================================================
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//
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// Copyright (c) 2002-
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// Authors:
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// * Dave Parker <david.parker@comlab.ox.ac.uk> (University of Oxford, formerly University of Birmingham)
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// * Gethin Norman <gethin.norman@comlab.ox.ac.uk> (University of Oxford, formerly University of Birmingham)
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//
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//------------------------------------------------------------------------------
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//
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// This file is part of PRISM.
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//
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// PRISM is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// PRISM is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with PRISM; if not, write to the Free Software Foundation,
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// Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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//
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//==============================================================================
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// includes
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#include "PrismMTBDD.h"
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#include <math.h>
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#include <util.h>
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#include <cudd.h>
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#include <dd.h>
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#include "PrismMTBDDGlob.h"
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#include "jnipointer.h"
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//------------------------------------------------------------------------------
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// PCTL until probability 1 precomputation
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// (for all = min) (nondeterministic/mdp) (mtbdd)
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// (i.e. compute states FOR which ALL probabilities are 1)
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JNIEXPORT jlong __jlongpointer JNICALL Java_mtbdd_PrismMTBDD_PM_1Prob1A
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(
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JNIEnv *env,
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jclass cls,
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jlong __jlongpointer t01, // 0-1 trans matrix
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jlong __jlongpointer r, // reachable states
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jlong __jlongpointer ndm, // nondeterminism mask
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jlong __jlongpointer rv, // row vars
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jint num_rvars,
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jlong __jlongpointer cv, // col vars
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jint num_cvars,
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jlong __jlongpointer ndv, // nondet vars
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jint num_ndvars,
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jlong __jlongpointer n, // no
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jlong __jlongpointer psi // psi(b2)
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)
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{
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DdNode *trans01 = jlong_to_DdNode(t01); // 0-1 trans matrix
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DdNode *reach = jlong_to_DdNode(r); // reachable states
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DdNode *mask = jlong_to_DdNode(ndm); // nondeterminism mask
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DdNode *no = jlong_to_DdNode(n); // no
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DdNode *b2 = jlong_to_DdNode(psi); // b2
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DdNode **rvars = jlong_to_DdNode_array(rv); // row vars
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DdNode **cvars = jlong_to_DdNode_array(cv); // col vars
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DdNode **ndvars = jlong_to_DdNode_array(ndv); // nondet vars
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DdNode *sol, *tmp, *notno;
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bool done;
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int iters;
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// timing stuff
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long start, stop;
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double time_taken, time_for_setup, time_for_iters;
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// start clock
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start = util_cpu_time();
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// negate set "no" ("there exists an adversary with prob=0") to get set "for all adversaries prob>0"
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Cudd_Ref(reach);
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Cudd_Ref(no);
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notno = DD_And(ddman, reach, DD_Not(ddman, no));
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// greatest fixed point loop
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Cudd_Ref(b2);
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Cudd_Ref(notno);
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sol = DD_Or(ddman, b2, notno);
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done = false;
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iters = 0;
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while (!done) {
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iters++;
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Cudd_Ref(sol);
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tmp = DD_SwapVariables(ddman, sol, rvars, cvars, num_rvars);
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Cudd_Ref(trans01);
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tmp = DD_ForAll(ddman, DD_Implies(ddman, trans01, tmp), cvars, num_cvars);
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Cudd_Ref(mask);
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tmp = DD_Or(ddman, tmp, mask);
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tmp = DD_ForAll(ddman, tmp, ndvars, num_ndvars);
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Cudd_Ref(notno);
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tmp = DD_And(ddman, notno, tmp);
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Cudd_Ref(b2);
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tmp = DD_Or(ddman, b2, tmp);
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if (tmp == sol) {
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done = true;
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}
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Cudd_RecursiveDeref(ddman, sol);
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sol = tmp;
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}
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// stop clock
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time_taken = (double)(util_cpu_time() - start)/1000;
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time_for_setup = 0;
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time_for_iters = time_taken;
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// print iterations/timing info
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PM_PrintToMainLog(env, "\nProb1A: %d iterations in %.2f seconds (average %.6f, setup %.2f)\n", iters, time_taken, time_for_iters/iters, time_for_setup);
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Cudd_RecursiveDeref(ddman, notno);
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return ptr_to_jlong(sol);
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}
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//------------------------------------------------------------------------------
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