Mercurial > hg > Members > kono > jpf-core

annotate src/main/gov/nasa/jpf/listener/StateCountEstimator.java @ 0:61d41facf527

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author Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
date Fri, 23 Jan 2015 10:14:01 -0800
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1 /*
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2 * Copyright (C) 2014, United States Government, as represented by the
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3 * Administrator of the National Aeronautics and Space Administration.
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4 * All rights reserved.
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5 *
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6 * The Java Pathfinder core (jpf-core) platform is licensed under the
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7 * Apache License, Version 2.0 (the "License"); you may not use this file except
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8 * in compliance with the License. You may obtain a copy of the License at
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9 *
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10 * http://www.apache.org/licenses/LICENSE-2.0.
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11 *
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12 * Unless required by applicable law or agreed to in writing, software
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13 * distributed under the License is distributed on an "AS IS" BASIS,
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14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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15 * See the License for the specific language governing permissions and
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16 * limitations under the License.
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17 */
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18 package gov.nasa.jpf.listener;
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19
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20 import gov.nasa.jpf.Config;
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21 import gov.nasa.jpf.ListenerAdapter;
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22 import gov.nasa.jpf.search.Search;
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23 import gov.nasa.jpf.vm.ChoiceGenerator;
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24 import gov.nasa.jpf.vm.VM;
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25 import gov.nasa.jpf.vm.Path;
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26 import gov.nasa.jpf.vm.Transition;
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27
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28 import java.io.PrintWriter;
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29 import java.util.Formatter;
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30
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31 /**
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32 * From already visited states, estimates the total number of states by the branching factor.
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33 */
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34
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35 public class StateCountEstimator extends ListenerAdapter
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36 {
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37 private final PrintWriter m_out;
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38 private final StringBuilder m_buffer = new StringBuilder();
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39 private final Formatter m_formatter = new Formatter(m_buffer);
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40 private final int m_logPeriod;
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41 private double m_lastPercent;
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42 private long m_nextLog;
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43 private long m_startTime;
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44
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45 public StateCountEstimator(Config config)
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46 {
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47 m_out = new PrintWriter(System.out, true);
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48 m_logPeriod = config.getInt("jpf.state_count_estimator.log_period", 0);
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49 }
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50
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51 @Override
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52 public void searchStarted(Search search)
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53 {
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54 m_nextLog = 0;
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55 m_lastPercent = 0.0;
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56 m_startTime = System.currentTimeMillis();
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57 }
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58
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59 @Override
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60 public void searchFinished(Search search)
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61 {
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62 log(search);
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63 }
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64
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65 @Override
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66 public void stateProcessed(Search search)
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67 {
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68 if (m_nextLog > System.currentTimeMillis())
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69 return;
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70
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71 if (log(search))
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72 m_nextLog = m_logPeriod + System.currentTimeMillis();
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73 }
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74
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75 private boolean log(Search search)
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76 {
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77 VM vm;
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78 Path path;
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79 Transition trans;
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80 ChoiceGenerator cg;
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81 double percent, delta;
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82 long currentState, expectedState, currentTime, expectedTime;
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83 int i, size, processed;
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84
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85 vm = search.getVM();
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86 path = vm.getPath();
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87 size = path.size();
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88 percent = 0.0;
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89 delta = 1.0;
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90 processed = 0;
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91
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92 for (i = 0; i < size; i++)
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93 {
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94 trans = path.get(i);
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95 cg = trans.getChoiceGenerator();
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96 delta /= cg.getTotalNumberOfChoices();
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97 processed = cg.getProcessedNumberOfChoices() - 1;
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98 percent += delta * processed;
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99 }
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100
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101 if (size == 0)
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102 percent = 1.0;
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103
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104 if (m_lastPercent > percent) // Sometimes a state is declared as processed but doesn't show up in the path so the percentage appears to go backwards.
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105 return(false);
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106
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107 m_lastPercent = percent;
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108
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109 currentState = vm.getStateCount();
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110 expectedState = (long) (currentState / percent);
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111
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112 currentTime = System.currentTimeMillis() - m_startTime;
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113 expectedTime = (long) (currentTime / percent);
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114
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115 m_formatter.format("State: %,d / %,d (%g%%) Time: ", currentState, expectedState, 100.0 * percent);
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116
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117 formatTime(expectedTime);
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118 m_buffer.append(" - ");
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119 formatTime(currentTime);
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120 m_buffer.append(" = ");
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121 formatTime(expectedTime - currentTime);
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122
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123 m_out.println(m_buffer.toString());
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124 m_buffer.setLength(0);
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125
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126 return(true);
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127 }
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128
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129 private void formatTime(long time)
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130 {
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131 long days, hours, minutes, seconds;
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132 boolean commit;
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133
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134 seconds = time / 1000;
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135 minutes = seconds / 60;
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136 hours = minutes / 60;
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137 days = hours / 24;
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138
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139 seconds %= 60;
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140 minutes %= 60;
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141 hours %= 24;
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142
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143 commit = false;
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144
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145 if ((commit) || (days != 0))
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146 {
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147 commit = true;
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
148 m_buffer.append(days);
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
149 m_buffer.append(' ');
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
150 }
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
151
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
152 if ((commit) || (hours != 0))
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
153 {
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
154 if ((commit) && (hours < 10))
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
155 m_buffer.append('0');
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
156
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
157 m_buffer.append(hours);
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
158 m_buffer.append(':');
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
159 commit = true;
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
160 }
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
161
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
162 if ((commit) || (minutes != 0))
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
163 {
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
164 if ((commit) && (minutes < 10))
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
165 m_buffer.append('0');
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
166
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
167 m_buffer.append(minutes);
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
168 m_buffer.append(':');
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
169 commit = true;
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
170 }
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
171
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
172 if ((commit) && (seconds < 10))
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
173 m_buffer.append('0');
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
174
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
175 m_buffer.append(seconds);
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
176 }
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
177 }