./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9ceec73f9e554c485344f34d2b1865bfa0707ac614302bf3f054f6fb35398f61 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 23:45:52,174 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 23:45:52,176 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 23:45:52,218 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 23:45:52,221 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 23:45:52,224 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 23:45:52,226 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 23:45:52,229 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 23:45:52,233 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 23:45:52,237 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 23:45:52,239 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 23:45:52,242 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 23:45:52,242 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 23:45:52,244 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 23:45:52,245 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 23:45:52,249 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 23:45:52,250 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 23:45:52,251 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 23:45:52,253 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 23:45:52,257 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 23:45:52,258 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 23:45:52,259 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 23:45:52,260 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 23:45:52,261 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 23:45:52,267 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 23:45:52,268 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 23:45:52,268 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 23:45:52,270 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 23:45:52,270 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 23:45:52,272 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 23:45:52,272 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 23:45:52,278 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 23:45:52,279 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 23:45:52,280 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 23:45:52,280 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 23:45:52,281 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 23:45:52,281 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 23:45:52,282 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 23:45:52,282 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 23:45:52,283 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 23:45:52,283 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 23:45:52,285 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 23:45:52,319 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 23:45:52,319 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 23:45:52,320 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 23:45:52,320 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 23:45:52,321 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 23:45:52,322 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 23:45:52,322 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 23:45:52,322 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 23:45:52,322 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 23:45:52,323 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 23:45:52,324 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 23:45:52,324 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 23:45:52,324 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 23:45:52,324 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 23:45:52,324 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 23:45:52,324 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 23:45:52,325 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 23:45:52,325 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 23:45:52,325 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 23:45:52,325 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 23:45:52,325 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 23:45:52,326 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 23:45:52,326 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 23:45:52,326 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 23:45:52,326 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 23:45:52,326 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:45:52,327 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 23:45:52,327 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 23:45:52,327 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 23:45:52,327 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 23:45:52,327 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 23:45:52,328 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 23:45:52,328 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 23:45:52,328 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 23:45:52,328 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9ceec73f9e554c485344f34d2b1865bfa0707ac614302bf3f054f6fb35398f61 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 23:45:52,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 23:45:52,664 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 23:45:52,666 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 23:45:52,667 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 23:45:52,667 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 23:45:52,668 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c [2023-08-29 23:45:53,880 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 23:45:54,127 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 23:45:54,127 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c [2023-08-29 23:45:54,136 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5b5f8f4c/78f127c870ff4163a0e0c6ef61f76139/FLAG39d439a63 [2023-08-29 23:45:54,160 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5b5f8f4c/78f127c870ff4163a0e0c6ef61f76139 [2023-08-29 23:45:54,162 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 23:45:54,164 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 23:45:54,171 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 23:45:54,171 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 23:45:54,174 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 23:45:54,174 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:45:54" (1/1) ... [2023-08-29 23:45:54,176 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a285a75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:45:54, skipping insertion in model container [2023-08-29 23:45:54,176 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:45:54" (1/1) ... [2023-08-29 23:45:54,181 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 23:45:54,210 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:45:54,404 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c[4293,4306] [2023-08-29 23:45:54,419 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:45:54,431 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-29 23:45:54,432 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@45ea8939 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:45:54, skipping insertion in model container [2023-08-29 23:45:54,433 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 23:45:54,433 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-29 23:45:54,435 INFO L158 Benchmark]: Toolchain (without parser) took 270.61ms. Allocated memory is still 71.3MB. Free memory was 48.6MB in the beginning and 38.3MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-29 23:45:54,435 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 58.7MB. Free memory is still 35.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 23:45:54,436 INFO L158 Benchmark]: CACSL2BoogieTranslator took 262.60ms. Allocated memory is still 71.3MB. Free memory was 48.5MB in the beginning and 38.3MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-29 23:45:54,438 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 58.7MB. Free memory is still 35.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 262.60ms. Allocated memory is still 71.3MB. Free memory was 48.5MB in the beginning and 38.3MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 163]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9ceec73f9e554c485344f34d2b1865bfa0707ac614302bf3f054f6fb35398f61 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 23:45:56,080 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 23:45:56,081 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 23:45:56,106 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 23:45:56,112 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 23:45:56,114 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 23:45:56,116 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 23:45:56,119 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 23:45:56,122 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 23:45:56,123 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 23:45:56,124 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 23:45:56,126 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 23:45:56,127 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 23:45:56,129 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 23:45:56,130 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 23:45:56,132 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 23:45:56,133 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 23:45:56,137 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 23:45:56,139 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 23:45:56,142 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 23:45:56,153 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 23:45:56,158 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 23:45:56,159 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 23:45:56,160 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 23:45:56,163 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 23:45:56,166 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 23:45:56,167 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 23:45:56,168 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 23:45:56,169 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 23:45:56,170 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 23:45:56,172 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 23:45:56,173 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 23:45:56,175 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 23:45:56,175 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 23:45:56,176 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 23:45:56,177 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 23:45:56,178 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 23:45:56,178 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 23:45:56,178 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 23:45:56,179 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 23:45:56,179 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 23:45:56,181 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-29 23:45:56,210 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 23:45:56,211 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 23:45:56,212 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 23:45:56,212 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 23:45:56,213 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 23:45:56,213 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 23:45:56,214 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 23:45:56,214 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 23:45:56,214 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 23:45:56,214 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 23:45:56,215 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 23:45:56,215 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 23:45:56,216 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 23:45:56,216 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 23:45:56,216 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 23:45:56,216 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 23:45:56,216 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 23:45:56,216 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 23:45:56,217 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 23:45:56,217 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 23:45:56,217 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-29 23:45:56,217 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-29 23:45:56,217 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 23:45:56,218 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 23:45:56,218 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 23:45:56,218 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 23:45:56,218 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 23:45:56,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:45:56,219 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 23:45:56,219 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 23:45:56,219 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-29 23:45:56,219 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-29 23:45:56,220 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 23:45:56,220 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 23:45:56,220 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 23:45:56,220 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-29 23:45:56,220 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 23:45:56,221 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9ceec73f9e554c485344f34d2b1865bfa0707ac614302bf3f054f6fb35398f61 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 23:45:56,523 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 23:45:56,541 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 23:45:56,543 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 23:45:56,544 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 23:45:56,545 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 23:45:56,546 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c [2023-08-29 23:45:57,704 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 23:45:57,923 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 23:45:57,924 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c [2023-08-29 23:45:57,930 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27d9284b3/f915dde9037b45e996ea5b3cecbb6686/FLAG4939a22e5 [2023-08-29 23:45:57,943 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27d9284b3/f915dde9037b45e996ea5b3cecbb6686 [2023-08-29 23:45:57,945 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 23:45:57,947 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 23:45:57,948 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 23:45:57,948 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 23:45:57,955 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 23:45:57,956 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:45:57" (1/1) ... [2023-08-29 23:45:57,964 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@167f49dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:45:57, skipping insertion in model container [2023-08-29 23:45:57,964 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:45:57" (1/1) ... [2023-08-29 23:45:57,970 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 23:45:58,001 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:45:58,212 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c[4293,4306] [2023-08-29 23:45:58,225 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:45:58,241 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-29 23:45:58,247 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:45:58,283 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c[4293,4306] [2023-08-29 23:45:58,289 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:45:58,299 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 23:45:58,328 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c[4293,4306] [2023-08-29 23:45:58,342 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:45:58,355 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 23:45:58,356 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 23:45:58,361 INFO L208 MainTranslator]: Completed translation [2023-08-29 23:45:58,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:45:58 WrapperNode [2023-08-29 23:45:58,362 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 23:45:58,363 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 23:45:58,363 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 23:45:58,364 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 23:45:58,370 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:45:58" (1/1) ... [2023-08-29 23:45:58,392 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:45:58" (1/1) ... [2023-08-29 23:45:58,428 INFO L138 Inliner]: procedures = 28, calls = 79, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 317 [2023-08-29 23:45:58,428 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 23:45:58,429 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 23:45:58,429 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 23:45:58,429 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 23:45:58,445 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:45:58" (1/1) ... [2023-08-29 23:45:58,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:45:58" (1/1) ... [2023-08-29 23:45:58,481 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:45:58" (1/1) ... [2023-08-29 23:45:58,481 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:45:58" (1/1) ... [2023-08-29 23:45:58,491 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:45:58" (1/1) ... [2023-08-29 23:45:58,495 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:45:58" (1/1) ... [2023-08-29 23:45:58,498 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:45:58" (1/1) ... [2023-08-29 23:45:58,500 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:45:58" (1/1) ... [2023-08-29 23:45:58,503 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 23:45:58,504 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 23:45:58,504 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 23:45:58,504 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 23:45:58,505 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:45:58" (1/1) ... [2023-08-29 23:45:58,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:45:58,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:45:58,544 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 23:45:58,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 23:45:58,586 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 23:45:58,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-29 23:45:58,586 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 23:45:58,586 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-29 23:45:58,586 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-29 23:45:58,587 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-29 23:45:58,587 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-29 23:45:58,587 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-29 23:45:58,587 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-29 23:45:58,587 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-29 23:45:58,587 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-29 23:45:58,587 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-29 23:45:58,587 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-29 23:45:58,587 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-29 23:45:58,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-29 23:45:58,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 23:45:58,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 23:45:58,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 23:45:58,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-29 23:45:58,589 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 23:45:58,746 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 23:45:58,762 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 23:45:59,348 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 23:45:59,527 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 23:45:59,527 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-29 23:45:59,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:45:59 BoogieIcfgContainer [2023-08-29 23:45:59,530 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 23:45:59,532 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 23:45:59,532 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 23:45:59,535 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 23:45:59,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 11:45:57" (1/3) ... [2023-08-29 23:45:59,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2af1c771 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:45:59, skipping insertion in model container [2023-08-29 23:45:59,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:45:58" (2/3) ... [2023-08-29 23:45:59,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2af1c771 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:45:59, skipping insertion in model container [2023-08-29 23:45:59,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:45:59" (3/3) ... [2023-08-29 23:45:59,538 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt.wvr.c [2023-08-29 23:45:59,553 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 23:45:59,553 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2023-08-29 23:45:59,553 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 23:45:59,669 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-29 23:45:59,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 254 places, 260 transitions, 552 flow [2023-08-29 23:45:59,822 INFO L130 PetriNetUnfolder]: 19/256 cut-off events. [2023-08-29 23:45:59,822 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-29 23:45:59,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 256 events. 19/256 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 231 event pairs, 0 based on Foata normal form. 0/207 useless extension candidates. Maximal degree in co-relation 206. Up to 2 conditions per place. [2023-08-29 23:45:59,829 INFO L82 GeneralOperation]: Start removeDead. Operand has 254 places, 260 transitions, 552 flow [2023-08-29 23:45:59,838 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 246 places, 252 transitions, 528 flow [2023-08-29 23:45:59,842 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 23:45:59,853 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 246 places, 252 transitions, 528 flow [2023-08-29 23:45:59,857 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 246 places, 252 transitions, 528 flow [2023-08-29 23:45:59,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 246 places, 252 transitions, 528 flow [2023-08-29 23:45:59,917 INFO L130 PetriNetUnfolder]: 19/252 cut-off events. [2023-08-29 23:45:59,918 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-29 23:45:59,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 252 events. 19/252 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 231 event pairs, 0 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 206. Up to 2 conditions per place. [2023-08-29 23:45:59,923 INFO L119 LiptonReduction]: Number of co-enabled transitions 3392 [2023-08-29 23:46:26,557 INFO L134 LiptonReduction]: Checked pairs total: 7113 [2023-08-29 23:46:26,558 INFO L136 LiptonReduction]: Total number of compositions: 257 [2023-08-29 23:46:26,569 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 23:46:26,575 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@75bce884, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 23:46:26,575 INFO L358 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2023-08-29 23:46:26,578 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-29 23:46:26,578 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 23:46:26,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:46:26,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:46:26,580 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-29 23:46:26,584 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:46:26,584 INFO L85 PathProgramCache]: Analyzing trace with hash 37953, now seen corresponding path program 1 times [2023-08-29 23:46:26,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:46:26,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [251289177] [2023-08-29 23:46:26,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:46:26,596 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:46:26,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:46:26,605 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:46:26,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-29 23:46:26,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:46:26,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 23:46:26,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:46:26,976 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2023-08-29 23:46:26,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2023-08-29 23:46:27,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:46:27,028 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:46:27,029 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:46:27,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [251289177] [2023-08-29 23:46:27,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [251289177] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:46:27,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:46:27,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:46:27,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427437972] [2023-08-29 23:46:27,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:46:27,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:46:27,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:46:27,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:46:27,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:46:27,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 517 [2023-08-29 23:46:27,229 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 66 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:46:27,229 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:46:27,229 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 517 [2023-08-29 23:46:27,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:46:30,779 INFO L130 PetriNetUnfolder]: 21072/26499 cut-off events. [2023-08-29 23:46:30,779 INFO L131 PetriNetUnfolder]: For 223/223 co-relation queries the response was YES. [2023-08-29 23:46:30,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53205 conditions, 26499 events. 21072/26499 cut-off events. For 223/223 co-relation queries the response was YES. Maximal size of possible extension queue 1976. Compared 137726 event pairs, 14510 based on Foata normal form. 0/8208 useless extension candidates. Maximal degree in co-relation 47480. Up to 26073 conditions per place. [2023-08-29 23:46:31,020 INFO L137 encePairwiseOnDemand]: 513/517 looper letters, 56 selfloop transitions, 1 changer transitions 0/63 dead transitions. [2023-08-29 23:46:31,022 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 63 transitions, 264 flow [2023-08-29 23:46:31,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:46:31,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:46:31,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 696 transitions. [2023-08-29 23:46:31,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44874274661508706 [2023-08-29 23:46:31,046 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 696 transitions. [2023-08-29 23:46:31,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 696 transitions. [2023-08-29 23:46:31,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:46:31,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 696 transitions. [2023-08-29 23:46:31,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 232.0) internal successors, (696), 3 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:46:31,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 517.0) internal successors, (2068), 4 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:46:31,066 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 517.0) internal successors, (2068), 4 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:46:31,069 INFO L175 Difference]: Start difference. First operand has 73 places, 66 transitions, 156 flow. Second operand 3 states and 696 transitions. [2023-08-29 23:46:31,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 63 transitions, 264 flow [2023-08-29 23:46:31,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 63 transitions, 248 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-29 23:46:31,130 INFO L231 Difference]: Finished difference. Result has 64 places, 63 transitions, 136 flow [2023-08-29 23:46:31,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=517, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=64, PETRI_TRANSITIONS=63} [2023-08-29 23:46:31,135 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -9 predicate places. [2023-08-29 23:46:31,135 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 63 transitions, 136 flow [2023-08-29 23:46:31,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:46:31,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:46:31,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 23:46:31,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-08-29 23:46:31,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:46:31,346 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-29 23:46:31,348 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:46:31,348 INFO L85 PathProgramCache]: Analyzing trace with hash 37954, now seen corresponding path program 1 times [2023-08-29 23:46:31,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:46:31,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1061754859] [2023-08-29 23:46:31,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:46:31,351 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:46:31,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:46:31,353 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:46:31,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-29 23:46:31,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:46:31,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 23:46:31,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:46:31,622 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-29 23:46:31,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-29 23:46:31,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:46:31,660 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:46:31,661 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:46:31,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1061754859] [2023-08-29 23:46:31,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1061754859] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:46:31,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:46:31,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:46:31,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396562823] [2023-08-29 23:46:31,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:46:31,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:46:31,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:46:31,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:46:31,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:46:31,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 517 [2023-08-29 23:46:31,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 63 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:46:31,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:46:31,864 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 517 [2023-08-29 23:46:31,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:46:36,763 INFO L130 PetriNetUnfolder]: 42143/52995 cut-off events. [2023-08-29 23:46:36,764 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 23:46:36,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105588 conditions, 52995 events. 42143/52995 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3700. Compared 296944 event pairs, 29020 based on Foata normal form. 0/16883 useless extension candidates. Maximal degree in co-relation 105582. Up to 26074 conditions per place. [2023-08-29 23:46:37,126 INFO L137 encePairwiseOnDemand]: 511/517 looper letters, 107 selfloop transitions, 4 changer transitions 0/117 dead transitions. [2023-08-29 23:46:37,126 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 117 transitions, 474 flow [2023-08-29 23:46:37,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:46:37,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:46:37,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 749 transitions. [2023-08-29 23:46:37,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4829142488716957 [2023-08-29 23:46:37,132 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 749 transitions. [2023-08-29 23:46:37,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 749 transitions. [2023-08-29 23:46:37,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:46:37,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 749 transitions. [2023-08-29 23:46:37,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 249.66666666666666) internal successors, (749), 3 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:46:37,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 517.0) internal successors, (2068), 4 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:46:37,138 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 517.0) internal successors, (2068), 4 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:46:37,139 INFO L175 Difference]: Start difference. First operand has 64 places, 63 transitions, 136 flow. Second operand 3 states and 749 transitions. [2023-08-29 23:46:37,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 117 transitions, 474 flow [2023-08-29 23:46:37,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 117 transitions, 473 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:46:37,144 INFO L231 Difference]: Finished difference. Result has 67 places, 66 transitions, 167 flow [2023-08-29 23:46:37,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=517, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=167, PETRI_PLACES=67, PETRI_TRANSITIONS=66} [2023-08-29 23:46:37,145 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -6 predicate places. [2023-08-29 23:46:37,146 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 66 transitions, 167 flow [2023-08-29 23:46:37,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:46:37,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:46:37,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 23:46:37,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-29 23:46:37,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:46:37,358 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-29 23:46:37,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:46:37,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1178785, now seen corresponding path program 1 times [2023-08-29 23:46:37,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:46:37,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1166277753] [2023-08-29 23:46:37,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:46:37,361 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:46:37,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:46:37,362 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:46:37,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-29 23:46:37,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:46:37,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-29 23:46:37,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:46:37,622 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-29 23:46:37,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-29 23:46:37,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:46:37,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:46:37,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:46:37,882 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:46:37,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1166277753] [2023-08-29 23:46:37,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1166277753] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:46:37,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:46:37,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-29 23:46:37,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809883635] [2023-08-29 23:46:37,883 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:46:37,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 23:46:37,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:46:37,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 23:46:37,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-29 23:46:38,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 517 [2023-08-29 23:46:38,577 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 66 transitions, 167 flow. Second operand has 6 states, 6 states have (on average 203.0) internal successors, (1218), 6 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:46:38,577 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:46:38,577 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 517 [2023-08-29 23:46:38,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:46:45,157 INFO L130 PetriNetUnfolder]: 63222/79503 cut-off events. [2023-08-29 23:46:45,157 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 23:46:45,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158427 conditions, 79503 events. 63222/79503 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5300. Compared 461034 event pairs, 43530 based on Foata normal form. 0/25662 useless extension candidates. Maximal degree in co-relation 158418. Up to 26075 conditions per place. [2023-08-29 23:46:45,588 INFO L137 encePairwiseOnDemand]: 508/517 looper letters, 158 selfloop transitions, 19 changer transitions 0/183 dead transitions. [2023-08-29 23:46:45,588 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 183 transitions, 795 flow [2023-08-29 23:46:45,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 23:46:45,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 23:46:45,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1395 transitions. [2023-08-29 23:46:45,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497098646034816 [2023-08-29 23:46:45,593 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1395 transitions. [2023-08-29 23:46:45,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1395 transitions. [2023-08-29 23:46:45,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:46:45,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1395 transitions. [2023-08-29 23:46:45,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 232.5) internal successors, (1395), 6 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:46:45,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 517.0) internal successors, (3619), 7 states have internal predecessors, (3619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:46:45,604 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 517.0) internal successors, (3619), 7 states have internal predecessors, (3619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:46:45,604 INFO L175 Difference]: Start difference. First operand has 67 places, 66 transitions, 167 flow. Second operand 6 states and 1395 transitions. [2023-08-29 23:46:45,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 183 transitions, 795 flow [2023-08-29 23:46:45,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 183 transitions, 781 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:46:45,608 INFO L231 Difference]: Finished difference. Result has 74 places, 81 transitions, 304 flow [2023-08-29 23:46:45,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=517, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=304, PETRI_PLACES=74, PETRI_TRANSITIONS=81} [2023-08-29 23:46:45,609 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 1 predicate places. [2023-08-29 23:46:45,609 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 81 transitions, 304 flow [2023-08-29 23:46:45,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 203.0) internal successors, (1218), 6 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:46:45,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:46:45,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 23:46:45,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-08-29 23:46:45,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:46:45,819 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-29 23:46:45,820 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:46:45,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1180458, now seen corresponding path program 1 times [2023-08-29 23:46:45,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:46:45,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1060694747] [2023-08-29 23:46:45,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:46:45,821 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:46:45,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:46:45,822 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:46:45,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-29 23:46:45,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:46:45,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-29 23:46:45,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:46:45,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:46:45,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:46:45,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:46:45,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:46:46,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:46:46,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:46:46,110 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2023-08-29 23:46:46,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 41 [2023-08-29 23:46:46,170 INFO L321 Elim1Store]: treesize reduction 26, result has 16.1 percent of original size [2023-08-29 23:46:46,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 165 treesize of output 162 [2023-08-29 23:46:46,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:46:46,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 23:46:46,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:46:46,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:46:46,329 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:46:46,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1060694747] [2023-08-29 23:46:46,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1060694747] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:46:46,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:46:46,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:46:46,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837402661] [2023-08-29 23:46:46,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:46:46,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:46:46,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:46:46,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:46:46,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:46:46,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 517 [2023-08-29 23:46:46,620 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 81 transitions, 304 flow. Second operand has 4 states, 4 states have (on average 217.75) internal successors, (871), 4 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:46:46,620 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:46:46,620 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 517 [2023-08-29 23:46:46,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:46:51,190 INFO L130 PetriNetUnfolder]: 50800/64378 cut-off events. [2023-08-29 23:46:51,191 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 23:46:51,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128225 conditions, 64378 events. 50800/64378 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 4120. Compared 374338 event pairs, 34710 based on Foata normal form. 0/21127 useless extension candidates. Maximal degree in co-relation 128212. Up to 63100 conditions per place. [2023-08-29 23:46:51,597 INFO L137 encePairwiseOnDemand]: 514/517 looper letters, 70 selfloop transitions, 1 changer transitions 0/77 dead transitions. [2023-08-29 23:46:51,597 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 77 transitions, 426 flow [2023-08-29 23:46:51,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:46:51,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:46:51,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 708 transitions. [2023-08-29 23:46:51,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564796905222437 [2023-08-29 23:46:51,600 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 708 transitions. [2023-08-29 23:46:51,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 708 transitions. [2023-08-29 23:46:51,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:46:51,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 708 transitions. [2023-08-29 23:46:51,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 236.0) internal successors, (708), 3 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:46:51,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 517.0) internal successors, (2068), 4 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:46:51,607 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 517.0) internal successors, (2068), 4 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:46:51,607 INFO L175 Difference]: Start difference. First operand has 74 places, 81 transitions, 304 flow. Second operand 3 states and 708 transitions. [2023-08-29 23:46:51,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 77 transitions, 426 flow [2023-08-29 23:46:51,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 77 transitions, 407 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-29 23:46:51,612 INFO L231 Difference]: Finished difference. Result has 73 places, 77 transitions, 267 flow [2023-08-29 23:46:51,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=517, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=267, PETRI_PLACES=73, PETRI_TRANSITIONS=77} [2023-08-29 23:46:51,614 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 0 predicate places. [2023-08-29 23:46:51,614 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 77 transitions, 267 flow [2023-08-29 23:46:51,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 217.75) internal successors, (871), 4 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:46:51,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:46:51,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 23:46:51,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-29 23:46:51,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:46:51,827 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-29 23:46:51,827 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:46:51,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1180459, now seen corresponding path program 1 times [2023-08-29 23:46:51,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:46:51,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [804882642] [2023-08-29 23:46:51,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:46:51,828 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:46:51,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:46:51,829 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:46:51,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-29 23:46:51,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:46:51,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-29 23:46:51,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:46:51,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:46:52,082 INFO L321 Elim1Store]: treesize reduction 178, result has 18.7 percent of original size [2023-08-29 23:46:52,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 81 [2023-08-29 23:46:53,187 INFO L321 Elim1Store]: treesize reduction 48, result has 31.4 percent of original size [2023-08-29 23:46:53,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 44 [2023-08-29 23:46:53,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:46:53,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:46:53,702 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:46:53,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [804882642] [2023-08-29 23:46:53,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [804882642] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:46:53,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:46:53,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:46:53,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367606913] [2023-08-29 23:46:53,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:46:53,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:46:53,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:46:53,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:46:53,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:46:54,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 517 [2023-08-29 23:46:54,151 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 77 transitions, 267 flow. Second operand has 3 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:46:54,151 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:46:54,151 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 517 [2023-08-29 23:46:54,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:46:57,826 INFO L130 PetriNetUnfolder]: 38378/49253 cut-off events. [2023-08-29 23:46:57,826 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-29 23:46:57,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97956 conditions, 49253 events. 38378/49253 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 2963. Compared 287803 event pairs, 25890 based on Foata normal form. 0/17887 useless extension candidates. Maximal degree in co-relation 97942. Up to 47975 conditions per place. [2023-08-29 23:46:58,132 INFO L137 encePairwiseOnDemand]: 514/517 looper letters, 66 selfloop transitions, 1 changer transitions 0/73 dead transitions. [2023-08-29 23:46:58,132 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 73 transitions, 381 flow [2023-08-29 23:46:58,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:46:58,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:46:58,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 700 transitions. [2023-08-29 23:46:58,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4513217279174726 [2023-08-29 23:46:58,139 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 700 transitions. [2023-08-29 23:46:58,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 700 transitions. [2023-08-29 23:46:58,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:46:58,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 700 transitions. [2023-08-29 23:46:58,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 233.33333333333334) internal successors, (700), 3 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:46:58,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 517.0) internal successors, (2068), 4 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:46:58,144 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 517.0) internal successors, (2068), 4 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:46:58,145 INFO L175 Difference]: Start difference. First operand has 73 places, 77 transitions, 267 flow. Second operand 3 states and 700 transitions. [2023-08-29 23:46:58,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 73 transitions, 381 flow [2023-08-29 23:46:58,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 73 transitions, 380 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:46:58,147 INFO L231 Difference]: Finished difference. Result has 72 places, 73 transitions, 248 flow [2023-08-29 23:46:58,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=517, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=248, PETRI_PLACES=72, PETRI_TRANSITIONS=73} [2023-08-29 23:46:58,149 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -1 predicate places. [2023-08-29 23:46:58,150 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 73 transitions, 248 flow [2023-08-29 23:46:58,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:46:58,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:46:58,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 23:46:58,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-29 23:46:58,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:46:58,360 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-29 23:46:58,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:46:58,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1134447939, now seen corresponding path program 1 times [2023-08-29 23:46:58,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:46:58,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [162400508] [2023-08-29 23:46:58,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:46:58,361 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:46:58,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:46:58,363 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:46:58,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-29 23:46:58,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:46:58,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-29 23:46:58,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:46:58,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:46:58,576 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2023-08-29 23:46:58,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 74 [2023-08-29 23:46:59,542 INFO L321 Elim1Store]: treesize reduction 58, result has 27.5 percent of original size [2023-08-29 23:46:59,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 44 [2023-08-29 23:46:59,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:46:59,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:46:59,836 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:46:59,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [162400508] [2023-08-29 23:46:59,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [162400508] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:46:59,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:46:59,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:46:59,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996186905] [2023-08-29 23:46:59,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:46:59,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:46:59,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:46:59,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:46:59,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:47:00,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 517 [2023-08-29 23:47:00,150 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 73 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:00,150 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:47:00,150 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 517 [2023-08-29 23:47:00,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:47:03,568 INFO L130 PetriNetUnfolder]: 36959/47366 cut-off events. [2023-08-29 23:47:03,568 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-29 23:47:03,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94183 conditions, 47366 events. 36959/47366 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 2853. Compared 274590 event pairs, 24783 based on Foata normal form. 0/17476 useless extension candidates. Maximal degree in co-relation 94168. Up to 46088 conditions per place. [2023-08-29 23:47:03,834 INFO L137 encePairwiseOnDemand]: 514/517 looper letters, 64 selfloop transitions, 1 changer transitions 0/71 dead transitions. [2023-08-29 23:47:03,835 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 71 transitions, 374 flow [2023-08-29 23:47:03,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:47:03,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:47:03,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 698 transitions. [2023-08-29 23:47:03,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45003223726627983 [2023-08-29 23:47:03,837 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 698 transitions. [2023-08-29 23:47:03,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 698 transitions. [2023-08-29 23:47:03,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:47:03,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 698 transitions. [2023-08-29 23:47:03,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 232.66666666666666) internal successors, (698), 3 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:03,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 517.0) internal successors, (2068), 4 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:03,842 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 517.0) internal successors, (2068), 4 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:03,842 INFO L175 Difference]: Start difference. First operand has 72 places, 73 transitions, 248 flow. Second operand 3 states and 698 transitions. [2023-08-29 23:47:03,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 71 transitions, 374 flow [2023-08-29 23:47:03,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 71 transitions, 373 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:47:03,845 INFO L231 Difference]: Finished difference. Result has 71 places, 71 transitions, 245 flow [2023-08-29 23:47:03,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=517, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=245, PETRI_PLACES=71, PETRI_TRANSITIONS=71} [2023-08-29 23:47:03,846 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -2 predicate places. [2023-08-29 23:47:03,846 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 71 transitions, 245 flow [2023-08-29 23:47:03,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:03,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:47:03,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 23:47:03,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-29 23:47:04,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:47:04,056 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-29 23:47:04,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:47:04,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1134447938, now seen corresponding path program 1 times [2023-08-29 23:47:04,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:47:04,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1002911883] [2023-08-29 23:47:04,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:47:04,058 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:47:04,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:47:04,059 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:47:04,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-29 23:47:04,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:47:04,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-29 23:47:04,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:47:04,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:47:04,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:47:04,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:47:04,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:47:04,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:47:04,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:47:04,274 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2023-08-29 23:47:04,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 41 [2023-08-29 23:47:04,304 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-29 23:47:04,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2023-08-29 23:47:04,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:47:04,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 23:47:04,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:47:04,395 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:47:04,395 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:47:04,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1002911883] [2023-08-29 23:47:04,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1002911883] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:47:04,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:47:04,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:47:04,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249621468] [2023-08-29 23:47:04,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:47:04,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:47:04,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:47:04,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:47:04,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:47:04,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 517 [2023-08-29 23:47:04,594 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 245 flow. Second operand has 4 states, 4 states have (on average 218.25) internal successors, (873), 4 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:04,594 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:47:04,594 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 517 [2023-08-29 23:47:04,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:47:07,842 INFO L130 PetriNetUnfolder]: 35540/45479 cut-off events. [2023-08-29 23:47:07,843 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-29 23:47:07,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90410 conditions, 45479 events. 35540/45479 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 2743. Compared 261477 event pairs, 23676 based on Foata normal form. 0/17065 useless extension candidates. Maximal degree in co-relation 90394. Up to 44201 conditions per place. [2023-08-29 23:47:08,134 INFO L137 encePairwiseOnDemand]: 514/517 looper letters, 62 selfloop transitions, 1 changer transitions 0/69 dead transitions. [2023-08-29 23:47:08,134 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 69 transitions, 367 flow [2023-08-29 23:47:08,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:47:08,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:47:08,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 702 transitions. [2023-08-29 23:47:08,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4526112185686654 [2023-08-29 23:47:08,136 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 702 transitions. [2023-08-29 23:47:08,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 702 transitions. [2023-08-29 23:47:08,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:47:08,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 702 transitions. [2023-08-29 23:47:08,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 234.0) internal successors, (702), 3 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:08,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 517.0) internal successors, (2068), 4 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:08,141 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 517.0) internal successors, (2068), 4 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:08,141 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 245 flow. Second operand 3 states and 702 transitions. [2023-08-29 23:47:08,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 69 transitions, 367 flow [2023-08-29 23:47:08,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 69 transitions, 366 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:47:08,143 INFO L231 Difference]: Finished difference. Result has 70 places, 69 transitions, 242 flow [2023-08-29 23:47:08,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=517, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=70, PETRI_TRANSITIONS=69} [2023-08-29 23:47:08,144 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -3 predicate places. [2023-08-29 23:47:08,144 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 69 transitions, 242 flow [2023-08-29 23:47:08,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 218.25) internal successors, (873), 4 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:08,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:47:08,145 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-29 23:47:08,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-08-29 23:47:08,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:47:08,356 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-29 23:47:08,356 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:47:08,356 INFO L85 PathProgramCache]: Analyzing trace with hash 759641090, now seen corresponding path program 2 times [2023-08-29 23:47:08,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:47:08,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [787847100] [2023-08-29 23:47:08,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:47:08,357 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:47:08,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:47:08,358 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:47:08,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-29 23:47:08,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:47:08,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:47:08,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 23:47:08,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:47:08,738 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-29 23:47:08,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-29 23:47:08,868 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:47:08,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:47:09,301 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:47:09,301 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:47:09,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [787847100] [2023-08-29 23:47:09,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [787847100] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:47:09,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:47:09,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-29 23:47:09,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066081521] [2023-08-29 23:47:09,302 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:47:09,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 23:47:09,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:47:09,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 23:47:09,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-29 23:47:12,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 517 [2023-08-29 23:47:12,637 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 69 transitions, 242 flow. Second operand has 12 states, 12 states have (on average 205.0) internal successors, (2460), 12 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:12,637 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:47:12,637 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 517 [2023-08-29 23:47:12,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:47:15,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:47:16,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:47:17,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:47:19,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:47:20,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:47:22,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 23:47:37,097 INFO L130 PetriNetUnfolder]: 118453/151567 cut-off events. [2023-08-29 23:47:37,097 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2023-08-29 23:47:37,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301214 conditions, 151567 events. 118453/151567 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 5792. Compared 949479 event pairs, 78920 based on Foata normal form. 12/59436 useless extension candidates. Maximal degree in co-relation 301197. Up to 14739 conditions per place. [2023-08-29 23:47:38,022 INFO L137 encePairwiseOnDemand]: 510/517 looper letters, 435 selfloop transitions, 32 changer transitions 0/473 dead transitions. [2023-08-29 23:47:38,022 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 473 transitions, 2160 flow [2023-08-29 23:47:38,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 23:47:38,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 23:47:38,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2927 transitions. [2023-08-29 23:47:38,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.471792392005158 [2023-08-29 23:47:38,029 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2927 transitions. [2023-08-29 23:47:38,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2927 transitions. [2023-08-29 23:47:38,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:47:38,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2927 transitions. [2023-08-29 23:47:38,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 243.91666666666666) internal successors, (2927), 12 states have internal predecessors, (2927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:38,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 517.0) internal successors, (6721), 13 states have internal predecessors, (6721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:38,044 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 517.0) internal successors, (6721), 13 states have internal predecessors, (6721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:38,045 INFO L175 Difference]: Start difference. First operand has 70 places, 69 transitions, 242 flow. Second operand 12 states and 2927 transitions. [2023-08-29 23:47:38,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 473 transitions, 2160 flow [2023-08-29 23:47:38,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 473 transitions, 2159 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:47:38,051 INFO L231 Difference]: Finished difference. Result has 87 places, 88 transitions, 485 flow [2023-08-29 23:47:38,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=517, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=485, PETRI_PLACES=87, PETRI_TRANSITIONS=88} [2023-08-29 23:47:38,052 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 14 predicate places. [2023-08-29 23:47:38,052 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 88 transitions, 485 flow [2023-08-29 23:47:38,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 205.0) internal successors, (2460), 12 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:38,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:47:38,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 23:47:38,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-29 23:47:38,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:47:38,265 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-29 23:47:38,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:47:38,266 INFO L85 PathProgramCache]: Analyzing trace with hash 808140640, now seen corresponding path program 1 times [2023-08-29 23:47:38,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:47:38,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1078736506] [2023-08-29 23:47:38,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:47:38,266 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:47:38,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:47:38,268 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:47:38,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-29 23:47:38,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:47:38,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 23:47:38,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:47:38,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:47:38,398 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:47:38,401 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:47:38,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1078736506] [2023-08-29 23:47:38,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1078736506] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:47:38,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:47:38,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:47:38,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107658351] [2023-08-29 23:47:38,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:47:38,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:47:38,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:47:38,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:47:38,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:47:38,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 517 [2023-08-29 23:47:38,465 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 88 transitions, 485 flow. Second operand has 4 states, 4 states have (on average 215.25) internal successors, (861), 4 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:38,465 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:47:38,465 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 517 [2023-08-29 23:47:38,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:47:52,414 INFO L130 PetriNetUnfolder]: 132714/171900 cut-off events. [2023-08-29 23:47:52,415 INFO L131 PetriNetUnfolder]: For 109/109 co-relation queries the response was YES. [2023-08-29 23:47:53,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 341818 conditions, 171900 events. 132714/171900 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 7032. Compared 1135461 event pairs, 89640 based on Foata normal form. 0/70959 useless extension candidates. Maximal degree in co-relation 341793. Up to 147306 conditions per place. [2023-08-29 23:47:53,752 INFO L137 encePairwiseOnDemand]: 508/517 looper letters, 130 selfloop transitions, 3 changer transitions 0/139 dead transitions. [2023-08-29 23:47:53,753 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 139 transitions, 982 flow [2023-08-29 23:47:53,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 23:47:53,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 23:47:53,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 951 transitions. [2023-08-29 23:47:53,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4598646034816248 [2023-08-29 23:47:53,756 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 951 transitions. [2023-08-29 23:47:53,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 951 transitions. [2023-08-29 23:47:53,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:47:53,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 951 transitions. [2023-08-29 23:47:53,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 237.75) internal successors, (951), 4 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:53,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 517.0) internal successors, (2585), 5 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:53,761 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 517.0) internal successors, (2585), 5 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:53,761 INFO L175 Difference]: Start difference. First operand has 87 places, 88 transitions, 485 flow. Second operand 4 states and 951 transitions. [2023-08-29 23:47:53,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 139 transitions, 982 flow [2023-08-29 23:47:53,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 139 transitions, 899 flow, removed 21 selfloop flow, removed 4 redundant places. [2023-08-29 23:47:53,766 INFO L231 Difference]: Finished difference. Result has 87 places, 88 transitions, 445 flow [2023-08-29 23:47:53,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=517, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=445, PETRI_PLACES=87, PETRI_TRANSITIONS=88} [2023-08-29 23:47:53,767 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 14 predicate places. [2023-08-29 23:47:53,768 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 88 transitions, 445 flow [2023-08-29 23:47:53,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 215.25) internal successors, (861), 4 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:53,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:47:53,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:47:53,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-29 23:47:53,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:47:53,978 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-29 23:47:53,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:47:53,979 INFO L85 PathProgramCache]: Analyzing trace with hash 2122539070, now seen corresponding path program 1 times [2023-08-29 23:47:53,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:47:53,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1136852626] [2023-08-29 23:47:53,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:47:53,979 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:47:53,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:47:53,981 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:47:53,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-29 23:47:54,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:47:54,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 23:47:54,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:47:54,173 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2023-08-29 23:47:54,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2023-08-29 23:47:54,207 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-29 23:47:54,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 23:47:54,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:47:54,226 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:47:54,227 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:47:54,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1136852626] [2023-08-29 23:47:54,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1136852626] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:47:54,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:47:54,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:47:54,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120055257] [2023-08-29 23:47:54,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:47:54,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:47:54,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:47:54,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:47:54,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:47:54,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 517 [2023-08-29 23:47:54,376 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 88 transitions, 445 flow. Second operand has 4 states, 4 states have (on average 211.5) internal successors, (846), 4 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:54,377 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:47:54,377 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 517 [2023-08-29 23:47:54,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:48:04,199 INFO L130 PetriNetUnfolder]: 92684/121760 cut-off events. [2023-08-29 23:48:04,199 INFO L131 PetriNetUnfolder]: For 11939/11939 co-relation queries the response was YES. [2023-08-29 23:48:04,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266566 conditions, 121760 events. 92684/121760 cut-off events. For 11939/11939 co-relation queries the response was YES. Maximal size of possible extension queue 4840. Compared 806304 event pairs, 63360 based on Foata normal form. 0/64670 useless extension candidates. Maximal degree in co-relation 266539. Up to 118187 conditions per place. [2023-08-29 23:48:05,402 INFO L137 encePairwiseOnDemand]: 513/517 looper letters, 68 selfloop transitions, 12 changer transitions 0/86 dead transitions. [2023-08-29 23:48:05,402 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 86 transitions, 597 flow [2023-08-29 23:48:05,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 23:48:05,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 23:48:05,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 889 transitions. [2023-08-29 23:48:05,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42988394584139267 [2023-08-29 23:48:05,405 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 889 transitions. [2023-08-29 23:48:05,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 889 transitions. [2023-08-29 23:48:05,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:48:05,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 889 transitions. [2023-08-29 23:48:05,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 222.25) internal successors, (889), 4 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:48:05,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 517.0) internal successors, (2585), 5 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:48:05,411 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 517.0) internal successors, (2585), 5 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:48:05,411 INFO L175 Difference]: Start difference. First operand has 87 places, 88 transitions, 445 flow. Second operand 4 states and 889 transitions. [2023-08-29 23:48:05,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 86 transitions, 597 flow [2023-08-29 23:48:05,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 86 transitions, 591 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-29 23:48:05,427 INFO L231 Difference]: Finished difference. Result has 87 places, 86 transitions, 455 flow [2023-08-29 23:48:05,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=517, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=455, PETRI_PLACES=87, PETRI_TRANSITIONS=86} [2023-08-29 23:48:05,428 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 14 predicate places. [2023-08-29 23:48:05,428 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 86 transitions, 455 flow [2023-08-29 23:48:05,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 211.5) internal successors, (846), 4 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:48:05,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:48:05,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:48:05,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-29 23:48:05,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:48:05,638 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-29 23:48:05,638 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:48:05,638 INFO L85 PathProgramCache]: Analyzing trace with hash 2122539071, now seen corresponding path program 1 times [2023-08-29 23:48:05,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:48:05,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [791771114] [2023-08-29 23:48:05,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:48:05,639 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:48:05,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:48:05,640 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:48:05,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-29 23:48:05,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:48:05,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-29 23:48:05,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:48:05,956 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2023-08-29 23:48:05,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2023-08-29 23:48:06,134 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2023-08-29 23:48:06,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2023-08-29 23:48:06,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:48:06,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-29 23:48:06,277 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-29 23:48:06,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-29 23:48:06,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:48:06,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:48:09,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:48:09,020 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:48:09,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [791771114] [2023-08-29 23:48:09,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [791771114] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:48:09,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-29 23:48:09,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-29 23:48:09,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161019170] [2023-08-29 23:48:09,020 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-29 23:48:09,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 23:48:09,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:48:09,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 23:48:09,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-29 23:48:13,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:48:16,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:48:19,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:48:22,903 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:48:26,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 517 [2023-08-29 23:48:26,338 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 86 transitions, 455 flow. Second operand has 8 states, 8 states have (on average 193.5) internal successors, (1548), 8 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:48:26,338 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:48:26,338 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 517 [2023-08-29 23:48:26,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:48:33,380 WARN L222 SmtUtils]: Spent 6.93s on a formula simplification. DAG size of input: 55 DAG size of output: 54 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:48:34,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-29 23:48:51,179 WARN L222 SmtUtils]: Spent 6.36s on a formula simplification. DAG size of input: 53 DAG size of output: 52 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-29 23:49:15,113 INFO L130 PetriNetUnfolder]: 185526/243966 cut-off events. [2023-08-29 23:49:15,114 INFO L131 PetriNetUnfolder]: For 31122/31122 co-relation queries the response was YES. [2023-08-29 23:49:16,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 528769 conditions, 243966 events. 185526/243966 cut-off events. For 31122/31122 co-relation queries the response was YES. Maximal size of possible extension queue 9244. Compared 1721550 event pairs, 126320 based on Foata normal form. 0/148424 useless extension candidates. Maximal degree in co-relation 528741. Up to 98441 conditions per place. [2023-08-29 23:49:17,015 INFO L137 encePairwiseOnDemand]: 508/517 looper letters, 236 selfloop transitions, 31 changer transitions 0/273 dead transitions. [2023-08-29 23:49:17,015 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 273 transitions, 1625 flow [2023-08-29 23:49:17,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-29 23:49:17,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-29 23:49:17,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3104 transitions. [2023-08-29 23:49:17,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40025789813023854 [2023-08-29 23:49:17,022 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3104 transitions. [2023-08-29 23:49:17,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3104 transitions. [2023-08-29 23:49:17,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:49:17,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3104 transitions. [2023-08-29 23:49:17,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 206.93333333333334) internal successors, (3104), 15 states have internal predecessors, (3104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:49:17,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 517.0) internal successors, (8272), 16 states have internal predecessors, (8272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:49:17,037 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 517.0) internal successors, (8272), 16 states have internal predecessors, (8272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:49:17,038 INFO L175 Difference]: Start difference. First operand has 87 places, 86 transitions, 455 flow. Second operand 15 states and 3104 transitions. [2023-08-29 23:49:17,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 273 transitions, 1625 flow [2023-08-29 23:49:17,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 273 transitions, 1612 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:49:17,054 INFO L231 Difference]: Finished difference. Result has 105 places, 104 transitions, 696 flow [2023-08-29 23:49:17,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=517, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=696, PETRI_PLACES=105, PETRI_TRANSITIONS=104} [2023-08-29 23:49:17,054 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 32 predicate places. [2023-08-29 23:49:17,055 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 104 transitions, 696 flow [2023-08-29 23:49:17,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 193.5) internal successors, (1548), 8 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:49:17,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:49:17,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:49:17,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-29 23:49:17,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:49:17,266 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-08-29 23:49:17,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:49:17,266 INFO L85 PathProgramCache]: Analyzing trace with hash -717193971, now seen corresponding path program 1 times [2023-08-29 23:49:17,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-29 23:49:17,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2132751748] [2023-08-29 23:49:17,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:49:17,267 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-29 23:49:17,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-29 23:49:17,267 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-29 23:49:17,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-29 23:49:17,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:49:17,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 23:49:17,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:49:17,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:49:17,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:49:17,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:49:17,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:49:17,568 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-29 23:49:17,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 47 [2023-08-29 23:49:17,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-08-29 23:49:17,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 23:49:17,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 23:49:18,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:49:18,018 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 23:49:18,018 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-29 23:49:18,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2132751748] [2023-08-29 23:49:18,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2132751748] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:49:18,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:49:18,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:49:18,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104176237] [2023-08-29 23:49:18,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:49:18,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:49:18,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-29 23:49:18,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:49:18,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:49:18,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 517 [2023-08-29 23:49:18,389 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 104 transitions, 696 flow. Second operand has 4 states, 4 states have (on average 218.75) internal successors, (875), 4 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:49:18,389 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:49:18,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 517 [2023-08-29 23:49:18,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand