./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-sorted.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --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-more-sorted.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 362fd638a164593c63fbfc307f633b7ac4c475762218e6a2237e90d5b6553a84 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 03:30:37,158 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 03:30:37,160 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 03:30:37,208 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 03:30:37,211 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 03:30:37,214 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 03:30:37,216 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 03:30:37,218 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 03:30:37,220 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 03:30:37,225 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 03:30:37,226 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 03:30:37,227 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 03:30:37,228 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 03:30:37,230 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 03:30:37,231 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 03:30:37,232 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 03:30:37,233 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 03:30:37,234 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 03:30:37,236 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 03:30:37,248 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 03:30:37,251 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 03:30:37,255 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 03:30:37,256 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 03:30:37,257 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 03:30:37,260 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 03:30:37,260 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 03:30:37,261 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 03:30:37,262 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 03:30:37,263 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 03:30:37,263 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 03:30:37,264 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 03:30:37,265 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 03:30:37,266 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 03:30:37,267 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 03:30:37,268 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 03:30:37,268 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 03:30:37,269 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 03:30:37,269 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 03:30:37,269 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 03:30:37,270 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 03:30:37,270 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 03:30:37,272 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 03:30:37,308 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 03:30:37,308 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 03:30:37,309 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 03:30:37,309 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 03:30:37,310 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 03:30:37,310 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 03:30:37,311 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 03:30:37,311 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 03:30:37,311 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 03:30:37,311 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 03:30:37,312 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 03:30:37,313 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 03:30:37,313 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 03:30:37,313 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 03:30:37,313 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 03:30:37,313 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 03:30:37,314 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 03:30:37,314 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 03:30:37,314 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 03:30:37,314 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 03:30:37,314 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 03:30:37,314 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 03:30:37,315 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 03:30:37,315 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 03:30:37,315 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 03:30:37,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:30:37,316 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 03:30:37,316 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 03:30:37,316 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 03:30:37,316 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 03:30:37,316 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 03:30:37,317 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 03:30:37,317 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 03:30:37,317 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 03:30:37,317 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 362fd638a164593c63fbfc307f633b7ac4c475762218e6a2237e90d5b6553a84 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 03:30:37,634 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 03:30:37,653 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 03:30:37,655 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 03:30:37,656 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 03:30:37,656 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 03:30:37,658 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-sorted.wvr.c [2023-09-01 03:30:38,867 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 03:30:39,126 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 03:30:39,127 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-sorted.wvr.c [2023-09-01 03:30:39,135 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcd4b2184/6fe081299ba5468384544a4830275cd5/FLAG477b9019e [2023-09-01 03:30:39,158 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcd4b2184/6fe081299ba5468384544a4830275cd5 [2023-09-01 03:30:39,160 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 03:30:39,161 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 03:30:39,162 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 03:30:39,162 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 03:30:39,165 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 03:30:39,165 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:30:39" (1/1) ... [2023-09-01 03:30:39,166 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1809b9aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:30:39, skipping insertion in model container [2023-09-01 03:30:39,166 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:30:39" (1/1) ... [2023-09-01 03:30:39,172 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 03:30:39,190 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:30:39,365 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-more-sorted.wvr.c[2434,2447] [2023-09-01 03:30:39,377 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:30:39,385 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) [2023-09-01 03:30:39,385 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@41c70eec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:30:39, skipping insertion in model container [2023-09-01 03:30:39,386 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 03:30:39,386 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-09-01 03:30:39,387 INFO L158 Benchmark]: Toolchain (without parser) took 225.73ms. Allocated memory is still 75.5MB. Free memory was 53.8MB in the beginning and 43.9MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 03:30:39,388 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 58.7MB. Free memory is still 36.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 03:30:39,388 INFO L158 Benchmark]: CACSL2BoogieTranslator took 223.99ms. Allocated memory is still 75.5MB. Free memory was 53.6MB in the beginning and 43.9MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 03:30:39,389 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 58.7MB. Free memory is still 36.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 223.99ms. Allocated memory is still 75.5MB. Free memory was 53.6MB in the beginning and 43.9MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 101]: 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-more-sorted.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 362fd638a164593c63fbfc307f633b7ac4c475762218e6a2237e90d5b6553a84 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 03:30:41,017 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 03:30:41,020 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 03:30:41,053 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 03:30:41,055 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 03:30:41,058 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 03:30:41,059 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 03:30:41,062 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 03:30:41,064 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 03:30:41,068 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 03:30:41,069 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 03:30:41,071 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 03:30:41,072 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 03:30:41,074 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 03:30:41,075 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 03:30:41,080 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 03:30:41,081 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 03:30:41,082 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 03:30:41,084 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 03:30:41,088 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 03:30:41,089 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 03:30:41,097 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 03:30:41,098 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 03:30:41,099 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 03:30:41,106 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 03:30:41,106 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 03:30:41,107 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 03:30:41,108 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 03:30:41,110 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 03:30:41,111 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 03:30:41,111 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 03:30:41,116 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 03:30:41,117 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 03:30:41,118 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 03:30:41,119 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 03:30:41,120 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 03:30:41,120 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 03:30:41,121 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 03:30:41,121 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 03:30:41,122 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 03:30:41,122 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 03:30:41,124 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-09-01 03:30:41,156 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 03:30:41,156 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 03:30:41,158 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 03:30:41,158 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 03:30:41,159 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 03:30:41,159 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 03:30:41,159 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 03:30:41,159 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 03:30:41,160 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 03:30:41,160 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 03:30:41,161 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 03:30:41,161 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 03:30:41,161 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 03:30:41,161 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 03:30:41,161 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 03:30:41,162 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 03:30:41,162 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 03:30:41,162 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 03:30:41,162 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 03:30:41,162 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 03:30:41,163 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-09-01 03:30:41,163 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-09-01 03:30:41,163 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 03:30:41,163 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 03:30:41,163 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 03:30:41,164 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 03:30:41,164 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 03:30:41,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:30:41,164 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 03:30:41,164 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 03:30:41,165 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-09-01 03:30:41,165 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-09-01 03:30:41,165 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 03:30:41,165 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 03:30:41,165 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 03:30:41,166 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-09-01 03:30:41,166 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 03:30:41,166 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 362fd638a164593c63fbfc307f633b7ac4c475762218e6a2237e90d5b6553a84 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 03:30:41,464 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 03:30:41,480 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 03:30:41,482 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 03:30:41,483 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 03:30:41,483 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 03:30:41,484 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-sorted.wvr.c [2023-09-01 03:30:42,573 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 03:30:42,795 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 03:30:42,795 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-sorted.wvr.c [2023-09-01 03:30:42,801 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/101e56144/1a707b1abf5e4e328c81d743cbb2e601/FLAG33ae31de1 [2023-09-01 03:30:42,811 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/101e56144/1a707b1abf5e4e328c81d743cbb2e601 [2023-09-01 03:30:42,813 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 03:30:42,814 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 03:30:42,815 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 03:30:42,815 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 03:30:42,817 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 03:30:42,818 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:30:42" (1/1) ... [2023-09-01 03:30:42,819 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12ad8d72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:30:42, skipping insertion in model container [2023-09-01 03:30:42,819 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:30:42" (1/1) ... [2023-09-01 03:30:42,824 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 03:30:42,838 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:30:42,984 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-more-sorted.wvr.c[2434,2447] [2023-09-01 03:30:43,002 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:30:43,021 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-09-01 03:30:43,033 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:30:43,055 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-more-sorted.wvr.c[2434,2447] [2023-09-01 03:30:43,064 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:30:43,073 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 03:30:43,106 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-more-sorted.wvr.c[2434,2447] [2023-09-01 03:30:43,113 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:30:43,131 INFO L208 MainTranslator]: Completed translation [2023-09-01 03:30:43,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:30:43 WrapperNode [2023-09-01 03:30:43,132 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 03:30:43,133 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 03:30:43,133 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 03:30:43,133 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 03:30:43,138 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:30:43" (1/1) ... [2023-09-01 03:30:43,159 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:30:43" (1/1) ... [2023-09-01 03:30:43,184 INFO L138 Inliner]: procedures = 26, calls = 37, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 105 [2023-09-01 03:30:43,185 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 03:30:43,186 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 03:30:43,186 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 03:30:43,187 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 03:30:43,194 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:30:43" (1/1) ... [2023-09-01 03:30:43,194 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:30:43" (1/1) ... [2023-09-01 03:30:43,205 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:30:43" (1/1) ... [2023-09-01 03:30:43,206 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:30:43" (1/1) ... [2023-09-01 03:30:43,216 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:30:43" (1/1) ... [2023-09-01 03:30:43,228 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:30:43" (1/1) ... [2023-09-01 03:30:43,230 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:30:43" (1/1) ... [2023-09-01 03:30:43,231 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:30:43" (1/1) ... [2023-09-01 03:30:43,234 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 03:30:43,234 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 03:30:43,235 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 03:30:43,235 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 03:30:43,235 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:30:43" (1/1) ... [2023-09-01 03:30:43,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:30:43,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:30:43,264 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) [2023-09-01 03:30:43,312 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 [2023-09-01 03:30:43,367 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 03:30:43,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-09-01 03:30:43,368 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 03:30:43,368 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-09-01 03:30:43,368 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 03:30:43,368 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 03:30:43,368 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 03:30:43,368 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 03:30:43,369 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 03:30:43,369 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 03:30:43,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 03:30:43,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 03:30:43,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 03:30:43,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 03:30:43,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-09-01 03:30:43,371 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 03:30:43,533 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 03:30:43,535 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 03:30:43,984 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 03:30:43,997 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 03:30:43,997 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-09-01 03:30:43,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:30:43 BoogieIcfgContainer [2023-09-01 03:30:43,999 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 03:30:44,003 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 03:30:44,003 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 03:30:44,006 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 03:30:44,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 03:30:42" (1/3) ... [2023-09-01 03:30:44,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@700dda1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:30:44, skipping insertion in model container [2023-09-01 03:30:44,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:30:43" (2/3) ... [2023-09-01 03:30:44,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@700dda1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:30:44, skipping insertion in model container [2023-09-01 03:30:44,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:30:43" (3/3) ... [2023-09-01 03:30:44,009 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-sorted.wvr.c [2023-09-01 03:30:44,026 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 03:30:44,026 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2023-09-01 03:30:44,026 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 03:30:44,169 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 03:30:44,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 202 transitions, 428 flow [2023-09-01 03:30:44,306 INFO L130 PetriNetUnfolder]: 15/199 cut-off events. [2023-09-01 03:30:44,306 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 03:30:44,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212 conditions, 199 events. 15/199 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 340 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 141. Up to 2 conditions per place. [2023-09-01 03:30:44,313 INFO L82 GeneralOperation]: Start removeDead. Operand has 197 places, 202 transitions, 428 flow [2023-09-01 03:30:44,322 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 190 places, 195 transitions, 408 flow [2023-09-01 03:30:44,326 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 03:30:44,347 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 190 places, 195 transitions, 408 flow [2023-09-01 03:30:44,353 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 190 places, 195 transitions, 408 flow [2023-09-01 03:30:44,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 195 transitions, 408 flow [2023-09-01 03:30:44,413 INFO L130 PetriNetUnfolder]: 15/195 cut-off events. [2023-09-01 03:30:44,414 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 03:30:44,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 195 events. 15/195 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 340 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 141. Up to 2 conditions per place. [2023-09-01 03:30:44,420 INFO L119 LiptonReduction]: Number of co-enabled transitions 5658 [2023-09-01 03:31:03,014 INFO L134 LiptonReduction]: Checked pairs total: 7687 [2023-09-01 03:31:03,014 INFO L136 LiptonReduction]: Total number of compositions: 207 [2023-09-01 03:31:03,027 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 03:31:03,032 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;@66f0a436, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 03:31:03,032 INFO L358 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2023-09-01 03:31:03,035 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-09-01 03:31:03,035 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 03:31:03,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:31:03,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:31:03,036 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-09-01 03:31:03,040 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:31:03,040 INFO L85 PathProgramCache]: Analyzing trace with hash 24835, now seen corresponding path program 1 times [2023-09-01 03:31:03,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:31:03,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1211205361] [2023-09-01 03:31:03,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:31:03,050 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 [2023-09-01 03:31:03,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:31:03,057 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) [2023-09-01 03:31:03,100 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 [2023-09-01 03:31:03,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:31:03,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 03:31:03,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:31:03,332 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 03:31:03,333 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 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 03:31:03,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:31:03,360 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:31:03,361 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:31:03,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1211205361] [2023-09-01 03:31:03,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1211205361] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:31:03,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:31:03,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:31:03,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226510786] [2023-09-01 03:31:03,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:31:03,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:31:03,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:31:03,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:31:03,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:31:03,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 409 [2023-09-01 03:31:03,582 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 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) [2023-09-01 03:31:03,583 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:31:03,583 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 409 [2023-09-01 03:31:03,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:31:04,734 INFO L130 PetriNetUnfolder]: 6860/8459 cut-off events. [2023-09-01 03:31:04,734 INFO L131 PetriNetUnfolder]: For 71/71 co-relation queries the response was YES. [2023-09-01 03:31:04,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17030 conditions, 8459 events. 6860/8459 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 833. Compared 35807 event pairs, 3109 based on Foata normal form. 0/2120 useless extension candidates. Maximal degree in co-relation 15308. Up to 8403 conditions per place. [2023-09-01 03:31:04,807 INFO L137 encePairwiseOnDemand]: 403/409 looper letters, 46 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2023-09-01 03:31:04,808 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 50 transitions, 212 flow [2023-09-01 03:31:04,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:31:04,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:31:04,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 592 transitions. [2023-09-01 03:31:04,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48247758761206194 [2023-09-01 03:31:04,821 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 592 transitions. [2023-09-01 03:31:04,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 592 transitions. [2023-09-01 03:31:04,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:31:04,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 592 transitions. [2023-09-01 03:31:04,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.33333333333334) internal successors, (592), 3 states have internal predecessors, (592), 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) [2023-09-01 03:31:04,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 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) [2023-09-01 03:31:04,836 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 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) [2023-09-01 03:31:04,837 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 128 flow. Second operand 3 states and 592 transitions. [2023-09-01 03:31:04,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 50 transitions, 212 flow [2023-09-01 03:31:04,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 50 transitions, 200 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 03:31:04,846 INFO L231 Difference]: Finished difference. Result has 50 places, 50 transitions, 108 flow [2023-09-01 03:31:04,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=50, PETRI_TRANSITIONS=50} [2023-09-01 03:31:04,852 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -9 predicate places. [2023-09-01 03:31:04,852 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 50 transitions, 108 flow [2023-09-01 03:31:04,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 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) [2023-09-01 03:31:04,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:31:04,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:31:04,861 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 [2023-09-01 03:31:05,057 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 [2023-09-01 03:31:05,057 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-09-01 03:31:05,058 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:31:05,058 INFO L85 PathProgramCache]: Analyzing trace with hash 24836, now seen corresponding path program 1 times [2023-09-01 03:31:05,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:31:05,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [179181919] [2023-09-01 03:31:05,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:31:05,059 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 [2023-09-01 03:31:05,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:31:05,061 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) [2023-09-01 03:31:05,065 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 [2023-09-01 03:31:05,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:31:05,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 03:31:05,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:31:05,236 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:31:05,237 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 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:31:05,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:31:05,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:31:05,264 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:31:05,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [179181919] [2023-09-01 03:31:05,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [179181919] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:31:05,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:31:05,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:31:05,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852193350] [2023-09-01 03:31:05,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:31:05,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:31:05,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:31:05,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:31:05,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:31:05,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 409 [2023-09-01 03:31:05,451 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 50 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 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) [2023-09-01 03:31:05,451 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:31:05,452 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 409 [2023-09-01 03:31:05,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:31:07,311 INFO L130 PetriNetUnfolder]: 13705/16902 cut-off events. [2023-09-01 03:31:07,311 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2023-09-01 03:31:07,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33809 conditions, 16902 events. 13705/16902 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 1496. Compared 77823 event pairs, 6215 based on Foata normal form. 0/4240 useless extension candidates. Maximal degree in co-relation 33803. Up to 8401 conditions per place. [2023-09-01 03:31:07,416 INFO L137 encePairwiseOnDemand]: 406/409 looper letters, 90 selfloop transitions, 2 changer transitions 0/95 dead transitions. [2023-09-01 03:31:07,416 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 95 transitions, 388 flow [2023-09-01 03:31:07,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:31:07,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:31:07,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 633 transitions. [2023-09-01 03:31:07,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158924205378973 [2023-09-01 03:31:07,420 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 633 transitions. [2023-09-01 03:31:07,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 633 transitions. [2023-09-01 03:31:07,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:31:07,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 633 transitions. [2023-09-01 03:31:07,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 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) [2023-09-01 03:31:07,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 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) [2023-09-01 03:31:07,478 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 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) [2023-09-01 03:31:07,478 INFO L175 Difference]: Start difference. First operand has 50 places, 50 transitions, 108 flow. Second operand 3 states and 633 transitions. [2023-09-01 03:31:07,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 95 transitions, 388 flow [2023-09-01 03:31:07,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 95 transitions, 387 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:31:07,480 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 119 flow [2023-09-01 03:31:07,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=52, PETRI_TRANSITIONS=51} [2023-09-01 03:31:07,481 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -7 predicate places. [2023-09-01 03:31:07,482 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 119 flow [2023-09-01 03:31:07,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 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) [2023-09-01 03:31:07,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:31:07,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 03:31:07,494 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 [2023-09-01 03:31:07,691 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 [2023-09-01 03:31:07,692 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-09-01 03:31:07,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:31:07,693 INFO L85 PathProgramCache]: Analyzing trace with hash 24925, now seen corresponding path program 1 times [2023-09-01 03:31:07,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:31:07,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2032553482] [2023-09-01 03:31:07,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:31:07,693 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 [2023-09-01 03:31:07,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:31:07,695 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) [2023-09-01 03:31:07,699 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 [2023-09-01 03:31:07,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:31:07,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 03:31:07,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:31:07,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:31:07,775 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:31:07,775 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:31:07,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2032553482] [2023-09-01 03:31:07,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2032553482] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:31:07,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:31:07,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:31:07,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539823572] [2023-09-01 03:31:07,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:31:07,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:31:07,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:31:07,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:31:07,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:31:07,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 409 [2023-09-01 03:31:07,828 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 119 flow. Second operand has 3 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 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) [2023-09-01 03:31:07,828 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:31:07,828 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 409 [2023-09-01 03:31:07,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:31:08,717 INFO L130 PetriNetUnfolder]: 6860/8460 cut-off events. [2023-09-01 03:31:08,717 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 03:31:08,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16931 conditions, 8460 events. 6860/8460 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 833. Compared 35978 event pairs, 3109 based on Foata normal form. 1/2123 useless extension candidates. Maximal degree in co-relation 16923. Up to 8404 conditions per place. [2023-09-01 03:31:08,750 INFO L137 encePairwiseOnDemand]: 404/409 looper letters, 46 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2023-09-01 03:31:08,750 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 51 transitions, 215 flow [2023-09-01 03:31:08,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:31:08,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:31:08,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 597 transitions. [2023-09-01 03:31:08,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48655256723716384 [2023-09-01 03:31:08,753 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 597 transitions. [2023-09-01 03:31:08,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 597 transitions. [2023-09-01 03:31:08,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:31:08,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 597 transitions. [2023-09-01 03:31:08,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 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) [2023-09-01 03:31:08,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 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) [2023-09-01 03:31:08,758 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 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) [2023-09-01 03:31:08,759 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 119 flow. Second operand 3 states and 597 transitions. [2023-09-01 03:31:08,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 51 transitions, 215 flow [2023-09-01 03:31:08,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 51 transitions, 211 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 03:31:08,761 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 127 flow [2023-09-01 03:31:08,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=54, PETRI_TRANSITIONS=51} [2023-09-01 03:31:08,761 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -5 predicate places. [2023-09-01 03:31:08,762 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 127 flow [2023-09-01 03:31:08,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 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) [2023-09-01 03:31:08,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:31:08,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 03:31:08,775 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 (4)] Forceful destruction successful, exit code 0 [2023-09-01 03:31:08,971 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 [2023-09-01 03:31:08,971 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-09-01 03:31:08,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:31:08,972 INFO L85 PathProgramCache]: Analyzing trace with hash 772242, now seen corresponding path program 1 times [2023-09-01 03:31:08,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:31:08,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1988735397] [2023-09-01 03:31:08,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:31:08,973 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 [2023-09-01 03:31:08,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:31:08,974 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) [2023-09-01 03:31:08,977 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 [2023-09-01 03:31:09,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:31:09,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 03:31:09,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:31:09,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:31:09,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:31:09,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:31:09,141 INFO L321 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2023-09-01 03:31:09,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 35 [2023-09-01 03:31:09,159 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-09-01 03:31:09,160 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 23 treesize of output 19 [2023-09-01 03:31:09,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:31:09,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:31:09,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:31:09,555 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:31:09,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1988735397] [2023-09-01 03:31:09,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1988735397] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:31:09,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:31:09,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 03:31:09,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901751554] [2023-09-01 03:31:09,556 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:31:09,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 03:31:09,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:31:09,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 03:31:09,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-09-01 03:31:10,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 409 [2023-09-01 03:31:10,400 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 127 flow. Second operand has 6 states, 6 states have (on average 172.0) internal successors, (1032), 6 states have internal predecessors, (1032), 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) [2023-09-01 03:31:10,400 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:31:10,400 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 409 [2023-09-01 03:31:10,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:31:12,359 INFO L130 PetriNetUnfolder]: 12176/15084 cut-off events. [2023-09-01 03:31:12,359 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2023-09-01 03:31:12,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30196 conditions, 15084 events. 12176/15084 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 1316. Compared 69218 event pairs, 5515 based on Foata normal form. 0/3897 useless extension candidates. Maximal degree in co-relation 30186. Up to 8389 conditions per place. [2023-09-01 03:31:12,443 INFO L137 encePairwiseOnDemand]: 402/409 looper letters, 89 selfloop transitions, 11 changer transitions 0/103 dead transitions. [2023-09-01 03:31:12,443 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 103 transitions, 461 flow [2023-09-01 03:31:12,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 03:31:12,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 03:31:12,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1301 transitions. [2023-09-01 03:31:12,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4544184421935033 [2023-09-01 03:31:12,448 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1301 transitions. [2023-09-01 03:31:12,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1301 transitions. [2023-09-01 03:31:12,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:31:12,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1301 transitions. [2023-09-01 03:31:12,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 185.85714285714286) internal successors, (1301), 7 states have internal predecessors, (1301), 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) [2023-09-01 03:31:12,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 409.0) internal successors, (3272), 8 states have internal predecessors, (3272), 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) [2023-09-01 03:31:12,457 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 409.0) internal successors, (3272), 8 states have internal predecessors, (3272), 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) [2023-09-01 03:31:12,457 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 127 flow. Second operand 7 states and 1301 transitions. [2023-09-01 03:31:12,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 103 transitions, 461 flow [2023-09-01 03:31:12,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 103 transitions, 457 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:31:12,460 INFO L231 Difference]: Finished difference. Result has 61 places, 59 transitions, 204 flow [2023-09-01 03:31:12,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=204, PETRI_PLACES=61, PETRI_TRANSITIONS=59} [2023-09-01 03:31:12,461 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 2 predicate places. [2023-09-01 03:31:12,461 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 59 transitions, 204 flow [2023-09-01 03:31:12,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 172.0) internal successors, (1032), 6 states have internal predecessors, (1032), 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) [2023-09-01 03:31:12,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:31:12,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 03:31:12,474 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 [2023-09-01 03:31:12,673 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 [2023-09-01 03:31:12,674 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-09-01 03:31:12,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:31:12,674 INFO L85 PathProgramCache]: Analyzing trace with hash 772244, now seen corresponding path program 1 times [2023-09-01 03:31:12,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:31:12,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [500052280] [2023-09-01 03:31:12,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:31:12,675 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 [2023-09-01 03:31:12,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:31:12,676 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) [2023-09-01 03:31:12,680 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 [2023-09-01 03:31:12,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:31:12,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 03:31:12,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:31:12,829 INFO L321 Elim1Store]: treesize reduction 115, result has 16.1 percent of original size [2023-09-01 03:31:12,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 47 [2023-09-01 03:31:12,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:31:12,899 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:31:12,899 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:31:12,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [500052280] [2023-09-01 03:31:12,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [500052280] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:31:12,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:31:12,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:31:12,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386985491] [2023-09-01 03:31:12,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:31:12,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:31:12,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:31:12,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:31:12,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:31:13,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 409 [2023-09-01 03:31:13,086 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 59 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 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) [2023-09-01 03:31:13,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:31:13,087 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 409 [2023-09-01 03:31:13,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:31:13,905 INFO L130 PetriNetUnfolder]: 9123/11440 cut-off events. [2023-09-01 03:31:13,905 INFO L131 PetriNetUnfolder]: For 217/217 co-relation queries the response was YES. [2023-09-01 03:31:13,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23174 conditions, 11440 events. 9123/11440 cut-off events. For 217/217 co-relation queries the response was YES. Maximal size of possible extension queue 986. Compared 53163 event pairs, 4118 based on Foata normal form. 0/3445 useless extension candidates. Maximal degree in co-relation 23161. Up to 11328 conditions per place. [2023-09-01 03:31:13,959 INFO L137 encePairwiseOnDemand]: 406/409 looper letters, 51 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2023-09-01 03:31:13,960 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 55 transitions, 284 flow [2023-09-01 03:31:13,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:31:13,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:31:13,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 587 transitions. [2023-09-01 03:31:13,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47840260798696005 [2023-09-01 03:31:13,962 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 587 transitions. [2023-09-01 03:31:13,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 587 transitions. [2023-09-01 03:31:13,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:31:13,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 587 transitions. [2023-09-01 03:31:13,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 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) [2023-09-01 03:31:13,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 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) [2023-09-01 03:31:13,967 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 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) [2023-09-01 03:31:13,967 INFO L175 Difference]: Start difference. First operand has 61 places, 59 transitions, 204 flow. Second operand 3 states and 587 transitions. [2023-09-01 03:31:13,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 55 transitions, 284 flow [2023-09-01 03:31:13,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 55 transitions, 272 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-09-01 03:31:13,970 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 170 flow [2023-09-01 03:31:13,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2023-09-01 03:31:13,971 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 1 predicate places. [2023-09-01 03:31:13,971 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 170 flow [2023-09-01 03:31:13,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 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) [2023-09-01 03:31:13,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:31:13,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 03:31:13,983 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 [2023-09-01 03:31:14,180 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 [2023-09-01 03:31:14,181 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-09-01 03:31:14,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:31:14,181 INFO L85 PathProgramCache]: Analyzing trace with hash 772153, now seen corresponding path program 1 times [2023-09-01 03:31:14,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:31:14,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [598205837] [2023-09-01 03:31:14,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:31:14,182 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 [2023-09-01 03:31:14,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:31:14,183 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) [2023-09-01 03:31:14,185 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 [2023-09-01 03:31:14,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:31:14,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 03:31:14,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:31:14,333 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:31:14,333 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 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:31:14,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:31:14,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:31:14,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:31:14,539 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:31:14,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [598205837] [2023-09-01 03:31:14,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [598205837] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:31:14,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:31:14,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-09-01 03:31:14,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066609884] [2023-09-01 03:31:14,540 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:31:14,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 03:31:14,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:31:14,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 03:31:14,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-09-01 03:31:15,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 409 [2023-09-01 03:31:15,355 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 170 flow. Second operand has 6 states, 6 states have (on average 176.0) internal successors, (1056), 6 states have internal predecessors, (1056), 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) [2023-09-01 03:31:15,355 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:31:15,355 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 409 [2023-09-01 03:31:15,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:31:16,507 INFO L130 PetriNetUnfolder]: 9108/11423 cut-off events. [2023-09-01 03:31:16,508 INFO L131 PetriNetUnfolder]: For 217/217 co-relation queries the response was YES. [2023-09-01 03:31:16,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23129 conditions, 11423 events. 9108/11423 cut-off events. For 217/217 co-relation queries the response was YES. Maximal size of possible extension queue 881. Compared 52339 event pairs, 4115 based on Foata normal form. 3/3445 useless extension candidates. Maximal degree in co-relation 23115. Up to 6560 conditions per place. [2023-09-01 03:31:16,561 INFO L137 encePairwiseOnDemand]: 404/409 looper letters, 83 selfloop transitions, 8 changer transitions 0/94 dead transitions. [2023-09-01 03:31:16,561 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 94 transitions, 438 flow [2023-09-01 03:31:16,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 03:31:16,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 03:31:16,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1144 transitions. [2023-09-01 03:31:16,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4661776691116544 [2023-09-01 03:31:16,565 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1144 transitions. [2023-09-01 03:31:16,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1144 transitions. [2023-09-01 03:31:16,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:31:16,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1144 transitions. [2023-09-01 03:31:16,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 190.66666666666666) internal successors, (1144), 6 states have internal predecessors, (1144), 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) [2023-09-01 03:31:16,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 409.0) internal successors, (2863), 7 states have internal predecessors, (2863), 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) [2023-09-01 03:31:16,572 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 409.0) internal successors, (2863), 7 states have internal predecessors, (2863), 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) [2023-09-01 03:31:16,572 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 170 flow. Second operand 6 states and 1144 transitions. [2023-09-01 03:31:16,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 94 transitions, 438 flow [2023-09-01 03:31:16,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 94 transitions, 429 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-09-01 03:31:16,575 INFO L231 Difference]: Finished difference. Result has 63 places, 54 transitions, 171 flow [2023-09-01 03:31:16,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=171, PETRI_PLACES=63, PETRI_TRANSITIONS=54} [2023-09-01 03:31:16,576 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 4 predicate places. [2023-09-01 03:31:16,576 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 54 transitions, 171 flow [2023-09-01 03:31:16,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 176.0) internal successors, (1056), 6 states have internal predecessors, (1056), 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) [2023-09-01 03:31:16,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:31:16,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 03:31:16,586 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 [2023-09-01 03:31:16,786 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 [2023-09-01 03:31:16,786 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-09-01 03:31:16,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:31:16,786 INFO L85 PathProgramCache]: Analyzing trace with hash 742142876, now seen corresponding path program 1 times [2023-09-01 03:31:16,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:31:16,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [334006120] [2023-09-01 03:31:16,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:31:16,787 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 [2023-09-01 03:31:16,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:31:16,788 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) [2023-09-01 03:31:16,789 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 [2023-09-01 03:31:16,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:31:16,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 03:31:16,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:31:16,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:31:16,945 INFO L321 Elim1Store]: treesize reduction 65, result has 34.3 percent of original size [2023-09-01 03:31:16,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 41 [2023-09-01 03:31:16,957 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 26 treesize of output 24 [2023-09-01 03:31:17,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:31:17,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:31:17,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:31:17,260 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:31:17,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [334006120] [2023-09-01 03:31:17,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [334006120] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:31:17,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:31:17,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 03:31:17,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062114954] [2023-09-01 03:31:17,261 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:31:17,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 03:31:17,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:31:17,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 03:31:17,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-09-01 03:31:18,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 409 [2023-09-01 03:31:18,166 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 54 transitions, 171 flow. Second operand has 8 states, 8 states have (on average 172.25) internal successors, (1378), 8 states have internal predecessors, (1378), 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) [2023-09-01 03:31:18,166 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:31:18,166 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 409 [2023-09-01 03:31:18,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:31:19,258 INFO L130 PetriNetUnfolder]: 8788/11005 cut-off events. [2023-09-01 03:31:19,258 INFO L131 PetriNetUnfolder]: For 216/216 co-relation queries the response was YES. [2023-09-01 03:31:19,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22296 conditions, 11005 events. 8788/11005 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 869. Compared 50136 event pairs, 3963 based on Foata normal form. 0/3374 useless extension candidates. Maximal degree in co-relation 22282. Up to 6355 conditions per place. [2023-09-01 03:31:19,297 INFO L137 encePairwiseOnDemand]: 405/409 looper letters, 84 selfloop transitions, 3 changer transitions 0/90 dead transitions. [2023-09-01 03:31:19,297 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 90 transitions, 429 flow [2023-09-01 03:31:19,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 03:31:19,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 03:31:19,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 942 transitions. [2023-09-01 03:31:19,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4606356968215159 [2023-09-01 03:31:19,300 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 942 transitions. [2023-09-01 03:31:19,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 942 transitions. [2023-09-01 03:31:19,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:31:19,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 942 transitions. [2023-09-01 03:31:19,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 188.4) internal successors, (942), 5 states have internal predecessors, (942), 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) [2023-09-01 03:31:19,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 409.0) internal successors, (2454), 6 states have internal predecessors, (2454), 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) [2023-09-01 03:31:19,306 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 409.0) internal successors, (2454), 6 states have internal predecessors, (2454), 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) [2023-09-01 03:31:19,306 INFO L175 Difference]: Start difference. First operand has 63 places, 54 transitions, 171 flow. Second operand 5 states and 942 transitions. [2023-09-01 03:31:19,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 90 transitions, 429 flow [2023-09-01 03:31:19,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 90 transitions, 410 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-09-01 03:31:19,308 INFO L231 Difference]: Finished difference. Result has 60 places, 52 transitions, 154 flow [2023-09-01 03:31:19,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=154, PETRI_PLACES=60, PETRI_TRANSITIONS=52} [2023-09-01 03:31:19,309 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 1 predicate places. [2023-09-01 03:31:19,309 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 52 transitions, 154 flow [2023-09-01 03:31:19,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 172.25) internal successors, (1378), 8 states have internal predecessors, (1378), 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) [2023-09-01 03:31:19,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:31:19,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 03:31:19,319 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 [2023-09-01 03:31:19,519 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 [2023-09-01 03:31:19,520 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-09-01 03:31:19,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:31:19,520 INFO L85 PathProgramCache]: Analyzing trace with hash 742142875, now seen corresponding path program 1 times [2023-09-01 03:31:19,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:31:19,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1532673743] [2023-09-01 03:31:19,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:31:19,521 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 [2023-09-01 03:31:19,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:31:19,522 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) [2023-09-01 03:31:19,523 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 [2023-09-01 03:31:19,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:31:19,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 03:31:19,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:31:19,654 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-09-01 03:31:19,655 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 4 case distinctions, treesize of input 29 treesize of output 40 [2023-09-01 03:31:19,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:31:19,751 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:31:19,751 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:31:19,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1532673743] [2023-09-01 03:31:19,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1532673743] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:31:19,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:31:19,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:31:19,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672329033] [2023-09-01 03:31:19,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:31:19,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:31:19,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:31:19,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:31:19,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:31:19,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 409 [2023-09-01 03:31:19,892 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 52 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 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) [2023-09-01 03:31:19,892 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:31:19,892 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 409 [2023-09-01 03:31:19,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:31:20,562 INFO L130 PetriNetUnfolder]: 8482/10601 cut-off events. [2023-09-01 03:31:20,563 INFO L131 PetriNetUnfolder]: For 216/216 co-relation queries the response was YES. [2023-09-01 03:31:20,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21482 conditions, 10601 events. 8482/10601 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 942. Compared 48164 event pairs, 3814 based on Foata normal form. 0/3305 useless extension candidates. Maximal degree in co-relation 21468. Up to 10489 conditions per place. [2023-09-01 03:31:20,592 INFO L137 encePairwiseOnDemand]: 406/409 looper letters, 46 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2023-09-01 03:31:20,592 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 50 transitions, 244 flow [2023-09-01 03:31:20,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:31:20,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:31:20,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 583 transitions. [2023-09-01 03:31:20,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4751426242868786 [2023-09-01 03:31:20,594 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 583 transitions. [2023-09-01 03:31:20,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 583 transitions. [2023-09-01 03:31:20,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:31:20,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 583 transitions. [2023-09-01 03:31:20,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 194.33333333333334) internal successors, (583), 3 states have internal predecessors, (583), 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) [2023-09-01 03:31:20,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 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) [2023-09-01 03:31:20,598 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 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) [2023-09-01 03:31:20,598 INFO L175 Difference]: Start difference. First operand has 60 places, 52 transitions, 154 flow. Second operand 3 states and 583 transitions. [2023-09-01 03:31:20,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 50 transitions, 244 flow [2023-09-01 03:31:20,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 50 transitions, 239 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 03:31:20,600 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 147 flow [2023-09-01 03:31:20,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=147, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2023-09-01 03:31:20,601 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -2 predicate places. [2023-09-01 03:31:20,601 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 147 flow [2023-09-01 03:31:20,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 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) [2023-09-01 03:31:20,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:31:20,602 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 03:31:20,609 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 [2023-09-01 03:31:20,803 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 [2023-09-01 03:31:20,803 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-09-01 03:31:20,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:31:20,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1530594973, now seen corresponding path program 2 times [2023-09-01 03:31:20,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:31:20,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1806604551] [2023-09-01 03:31:20,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:31:20,805 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 [2023-09-01 03:31:20,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:31:20,808 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) [2023-09-01 03:31:20,808 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 [2023-09-01 03:31:20,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 03:31:20,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:31:20,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 03:31:20,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:31:20,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:31:20,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:31:20,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 03:31:20,950 INFO L321 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2023-09-01 03:31:20,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 35 [2023-09-01 03:31:20,966 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-09-01 03:31:20,967 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 23 treesize of output 19 [2023-09-01 03:31:21,082 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 03:31:21,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:31:21,082 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:31:21,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1806604551] [2023-09-01 03:31:21,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1806604551] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:31:21,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:31:21,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:31:21,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589636669] [2023-09-01 03:31:21,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:31:21,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:31:21,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:31:21,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:31:21,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:31:23,144 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 [0] [2023-09-01 03:31:23,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 409 [2023-09-01 03:31:23,287 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 147 flow. Second operand has 3 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 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) [2023-09-01 03:31:23,287 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:31:23,287 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 409 [2023-09-01 03:31:23,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:31:23,981 INFO L130 PetriNetUnfolder]: 8482/10600 cut-off events. [2023-09-01 03:31:23,981 INFO L131 PetriNetUnfolder]: For 216/216 co-relation queries the response was YES. [2023-09-01 03:31:23,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21477 conditions, 10600 events. 8482/10600 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 942. Compared 48366 event pairs, 3814 based on Foata normal form. 0/3305 useless extension candidates. Maximal degree in co-relation 21463. Up to 10488 conditions per place. [2023-09-01 03:31:24,008 INFO L137 encePairwiseOnDemand]: 407/409 looper letters, 45 selfloop transitions, 1 changer transitions 0/49 dead transitions. [2023-09-01 03:31:24,008 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 49 transitions, 234 flow [2023-09-01 03:31:24,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:31:24,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:31:24,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 578 transitions. [2023-09-01 03:31:24,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4710676446617767 [2023-09-01 03:31:24,010 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 578 transitions. [2023-09-01 03:31:24,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 578 transitions. [2023-09-01 03:31:24,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:31:24,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 578 transitions. [2023-09-01 03:31:24,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 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) [2023-09-01 03:31:24,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 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) [2023-09-01 03:31:24,014 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 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) [2023-09-01 03:31:24,014 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 147 flow. Second operand 3 states and 578 transitions. [2023-09-01 03:31:24,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 49 transitions, 234 flow [2023-09-01 03:31:24,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 49 transitions, 233 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:31:24,017 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 143 flow [2023-09-01 03:31:24,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=143, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2023-09-01 03:31:24,017 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -3 predicate places. [2023-09-01 03:31:24,018 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 143 flow [2023-09-01 03:31:24,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 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) [2023-09-01 03:31:24,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:31:24,018 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-09-01 03:31:24,025 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 [2023-09-01 03:31:24,223 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 [2023-09-01 03:31:24,223 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-09-01 03:31:24,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:31:24,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1530594884, now seen corresponding path program 2 times [2023-09-01 03:31:24,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:31:24,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1619739531] [2023-09-01 03:31:24,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:31:24,224 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 [2023-09-01 03:31:24,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:31:24,225 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) [2023-09-01 03:31:24,227 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 [2023-09-01 03:31:24,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:31:24,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:31:24,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 03:31:24,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:31:24,403 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:31:24,404 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 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:31:24,539 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:31:24,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:31:25,082 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:31:25,083 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:31:25,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1619739531] [2023-09-01 03:31:25,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1619739531] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:31:25,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:31:25,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 03:31:25,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878464299] [2023-09-01 03:31:25,083 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:31:25,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 03:31:25,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:31:25,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 03:31:25,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-09-01 03:31:28,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 409 [2023-09-01 03:31:28,201 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 143 flow. Second operand has 12 states, 12 states have (on average 177.0) internal successors, (2124), 12 states have internal predecessors, (2124), 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) [2023-09-01 03:31:28,201 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:31:28,201 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 409 [2023-09-01 03:31:28,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:31:35,273 INFO L130 PetriNetUnfolder]: 43411/53956 cut-off events. [2023-09-01 03:31:35,273 INFO L131 PetriNetUnfolder]: For 1637/1637 co-relation queries the response was YES. [2023-09-01 03:31:35,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109922 conditions, 53956 events. 43411/53956 cut-off events. For 1637/1637 co-relation queries the response was YES. Maximal size of possible extension queue 2657. Compared 278895 event pairs, 19589 based on Foata normal form. 6/16924 useless extension candidates. Maximal degree in co-relation 109907. Up to 6140 conditions per place. [2023-09-01 03:31:35,487 INFO L137 encePairwiseOnDemand]: 405/409 looper letters, 334 selfloop transitions, 12 changer transitions 0/349 dead transitions. [2023-09-01 03:31:35,487 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 349 transitions, 1533 flow [2023-09-01 03:31:35,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 03:31:35,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 03:31:35,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2464 transitions. [2023-09-01 03:31:35,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5020374898125509 [2023-09-01 03:31:35,493 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2464 transitions. [2023-09-01 03:31:35,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2464 transitions. [2023-09-01 03:31:35,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:31:35,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2464 transitions. [2023-09-01 03:31:35,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 205.33333333333334) internal successors, (2464), 12 states have internal predecessors, (2464), 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) [2023-09-01 03:31:35,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 409.0) internal successors, (5317), 13 states have internal predecessors, (5317), 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) [2023-09-01 03:31:35,505 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 409.0) internal successors, (5317), 13 states have internal predecessors, (5317), 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) [2023-09-01 03:31:35,505 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 143 flow. Second operand 12 states and 2464 transitions. [2023-09-01 03:31:35,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 349 transitions, 1533 flow [2023-09-01 03:31:35,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 349 transitions, 1532 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:31:35,516 INFO L231 Difference]: Finished difference. Result has 73 places, 56 transitions, 227 flow [2023-09-01 03:31:35,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=227, PETRI_PLACES=73, PETRI_TRANSITIONS=56} [2023-09-01 03:31:35,521 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 14 predicate places. [2023-09-01 03:31:35,521 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 56 transitions, 227 flow [2023-09-01 03:31:35,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 177.0) internal successors, (2124), 12 states have internal predecessors, (2124), 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) [2023-09-01 03:31:35,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:31:35,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 03:31:35,534 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 [2023-09-01 03:31:35,734 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 [2023-09-01 03:31:35,735 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-09-01 03:31:35,735 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:31:35,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1531585866, now seen corresponding path program 1 times [2023-09-01 03:31:35,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:31:35,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [173194735] [2023-09-01 03:31:35,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:31:35,736 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 [2023-09-01 03:31:35,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:31:35,737 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) [2023-09-01 03:31:35,740 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 [2023-09-01 03:31:35,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:31:35,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 03:31:35,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:31:35,864 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-09-01 03:31:35,866 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 3 case distinctions, treesize of input 15 treesize of output 50 [2023-09-01 03:31:35,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:31:35,907 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:31:35,907 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:31:35,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [173194735] [2023-09-01 03:31:35,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [173194735] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:31:35,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:31:35,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:31:35,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702971247] [2023-09-01 03:31:35,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:31:35,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:31:35,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:31:35,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:31:35,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:31:36,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 409 [2023-09-01 03:31:36,067 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 56 transitions, 227 flow. Second operand has 4 states, 4 states have (on average 167.25) internal successors, (669), 4 states have internal predecessors, (669), 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) [2023-09-01 03:31:36,067 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:31:36,067 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 409 [2023-09-01 03:31:36,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:31:38,739 INFO L130 PetriNetUnfolder]: 26945/33788 cut-off events. [2023-09-01 03:31:38,739 INFO L131 PetriNetUnfolder]: For 942/942 co-relation queries the response was YES. [2023-09-01 03:31:38,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68825 conditions, 33788 events. 26945/33788 cut-off events. For 942/942 co-relation queries the response was YES. Maximal size of possible extension queue 1437. Compared 169677 event pairs, 11868 based on Foata normal form. 0/11939 useless extension candidates. Maximal degree in co-relation 68802. Up to 33397 conditions per place. [2023-09-01 03:31:39,103 INFO L137 encePairwiseOnDemand]: 404/409 looper letters, 45 selfloop transitions, 5 changer transitions 0/53 dead transitions. [2023-09-01 03:31:39,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 53 transitions, 321 flow [2023-09-01 03:31:39,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:31:39,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:31:39,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 704 transitions. [2023-09-01 03:31:39,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43031784841075793 [2023-09-01 03:31:39,106 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 704 transitions. [2023-09-01 03:31:39,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 704 transitions. [2023-09-01 03:31:39,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:31:39,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 704 transitions. [2023-09-01 03:31:39,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 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) [2023-09-01 03:31:39,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 409.0) internal successors, (2045), 5 states have internal predecessors, (2045), 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) [2023-09-01 03:31:39,110 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 409.0) internal successors, (2045), 5 states have internal predecessors, (2045), 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) [2023-09-01 03:31:39,110 INFO L175 Difference]: Start difference. First operand has 73 places, 56 transitions, 227 flow. Second operand 4 states and 704 transitions. [2023-09-01 03:31:39,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 53 transitions, 321 flow [2023-09-01 03:31:39,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 53 transitions, 310 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 03:31:39,116 INFO L231 Difference]: Finished difference. Result has 69 places, 53 transitions, 220 flow [2023-09-01 03:31:39,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=220, PETRI_PLACES=69, PETRI_TRANSITIONS=53} [2023-09-01 03:31:39,117 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 10 predicate places. [2023-09-01 03:31:39,117 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 53 transitions, 220 flow [2023-09-01 03:31:39,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 167.25) internal successors, (669), 4 states have internal predecessors, (669), 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) [2023-09-01 03:31:39,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:31:39,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 03:31:39,127 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 [2023-09-01 03:31:39,327 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 [2023-09-01 03:31:39,327 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-09-01 03:31:39,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:31:39,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1531585893, now seen corresponding path program 1 times [2023-09-01 03:31:39,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:31:39,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1346378532] [2023-09-01 03:31:39,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:31:39,328 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 [2023-09-01 03:31:39,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:31:39,329 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) [2023-09-01 03:31:39,331 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 [2023-09-01 03:31:39,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:31:39,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 03:31:39,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:31:39,502 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:31:39,502 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 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:31:39,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:31:39,574 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:31:39,574 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:31:39,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1346378532] [2023-09-01 03:31:39,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1346378532] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:31:39,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:31:39,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 03:31:39,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359584503] [2023-09-01 03:31:39,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:31:39,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 03:31:39,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:31:39,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 03:31:39,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 03:31:39,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 409 [2023-09-01 03:31:39,879 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 53 transitions, 220 flow. Second operand has 5 states, 5 states have (on average 176.2) internal successors, (881), 5 states have internal predecessors, (881), 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) [2023-09-01 03:31:39,879 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:31:39,879 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 409 [2023-09-01 03:31:39,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:31:43,649 INFO L130 PetriNetUnfolder]: 37949/48572 cut-off events. [2023-09-01 03:31:43,649 INFO L131 PetriNetUnfolder]: For 1882/1882 co-relation queries the response was YES. [2023-09-01 03:31:43,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99338 conditions, 48572 events. 37949/48572 cut-off events. For 1882/1882 co-relation queries the response was YES. Maximal size of possible extension queue 2388. Compared 269488 event pairs, 8548 based on Foata normal form. 0/19556 useless extension candidates. Maximal degree in co-relation 99314. Up to 30904 conditions per place. [2023-09-01 03:31:43,899 INFO L137 encePairwiseOnDemand]: 402/409 looper letters, 73 selfloop transitions, 8 changer transitions 0/83 dead transitions. [2023-09-01 03:31:43,899 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 83 transitions, 449 flow [2023-09-01 03:31:43,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 03:31:43,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 03:31:43,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 945 transitions. [2023-09-01 03:31:43,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621026894865526 [2023-09-01 03:31:43,902 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 945 transitions. [2023-09-01 03:31:43,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 945 transitions. [2023-09-01 03:31:43,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:31:43,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 945 transitions. [2023-09-01 03:31:43,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 189.0) internal successors, (945), 5 states have internal predecessors, (945), 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) [2023-09-01 03:31:43,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 409.0) internal successors, (2454), 6 states have internal predecessors, (2454), 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) [2023-09-01 03:31:43,907 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 409.0) internal successors, (2454), 6 states have internal predecessors, (2454), 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) [2023-09-01 03:31:43,907 INFO L175 Difference]: Start difference. First operand has 69 places, 53 transitions, 220 flow. Second operand 5 states and 945 transitions. [2023-09-01 03:31:43,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 83 transitions, 449 flow [2023-09-01 03:31:43,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 83 transitions, 443 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:31:43,910 INFO L231 Difference]: Finished difference. Result has 72 places, 55 transitions, 245 flow [2023-09-01 03:31:43,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=245, PETRI_PLACES=72, PETRI_TRANSITIONS=55} [2023-09-01 03:31:43,912 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 13 predicate places. [2023-09-01 03:31:43,913 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 55 transitions, 245 flow [2023-09-01 03:31:43,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 176.2) internal successors, (881), 5 states have internal predecessors, (881), 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) [2023-09-01 03:31:43,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:31:43,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:31:43,932 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 (13)] Forceful destruction successful, exit code 0 [2023-09-01 03:31:44,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /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 [2023-09-01 03:31:44,122 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-09-01 03:31:44,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:31:44,123 INFO L85 PathProgramCache]: Analyzing trace with hash 234748074, now seen corresponding path program 1 times [2023-09-01 03:31:44,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:31:44,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1110102700] [2023-09-01 03:31:44,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:31:44,123 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 [2023-09-01 03:31:44,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:31:44,124 INFO L229 MonitoredProcess]: Starting monitored process 14 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) [2023-09-01 03:31:44,127 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 (14)] Waiting until timeout for monitored process [2023-09-01 03:31:44,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:31:44,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 03:31:44,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:31:44,300 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:31:44,301 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 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:31:44,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:31:44,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:31:44,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:31:44,616 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:31:44,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1110102700] [2023-09-01 03:31:44,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1110102700] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:31:44,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:31:44,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-09-01 03:31:44,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790620847] [2023-09-01 03:31:44,617 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:31:44,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 03:31:44,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:31:44,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 03:31:44,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-09-01 03:31:45,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 409 [2023-09-01 03:31:45,347 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 55 transitions, 245 flow. Second operand has 8 states, 8 states have (on average 172.75) internal successors, (1382), 8 states have internal predecessors, (1382), 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) [2023-09-01 03:31:45,347 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:31:45,347 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 409 [2023-09-01 03:31:45,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:31:49,110 INFO L130 PetriNetUnfolder]: 31546/40642 cut-off events. [2023-09-01 03:31:49,110 INFO L131 PetriNetUnfolder]: For 4844/5731 co-relation queries the response was YES. [2023-09-01 03:31:49,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90125 conditions, 40642 events. 31546/40642 cut-off events. For 4844/5731 co-relation queries the response was YES. Maximal size of possible extension queue 2204. Compared 227780 event pairs, 16100 based on Foata normal form. 887/18951 useless extension candidates. Maximal degree in co-relation 90100. Up to 36844 conditions per place. [2023-09-01 03:31:49,300 INFO L137 encePairwiseOnDemand]: 405/409 looper letters, 80 selfloop transitions, 3 changer transitions 0/86 dead transitions. [2023-09-01 03:31:49,300 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 86 transitions, 502 flow [2023-09-01 03:31:49,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 03:31:49,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 03:31:49,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 927 transitions. [2023-09-01 03:31:49,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45330073349633254 [2023-09-01 03:31:49,302 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 927 transitions. [2023-09-01 03:31:49,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 927 transitions. [2023-09-01 03:31:49,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:31:49,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 927 transitions. [2023-09-01 03:31:49,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 185.4) internal successors, (927), 5 states have internal predecessors, (927), 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) [2023-09-01 03:31:49,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 409.0) internal successors, (2454), 6 states have internal predecessors, (2454), 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) [2023-09-01 03:31:49,306 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 409.0) internal successors, (2454), 6 states have internal predecessors, (2454), 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) [2023-09-01 03:31:49,306 INFO L175 Difference]: Start difference. First operand has 72 places, 55 transitions, 245 flow. Second operand 5 states and 927 transitions. [2023-09-01 03:31:49,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 86 transitions, 502 flow [2023-09-01 03:31:49,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 86 transitions, 485 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 03:31:49,310 INFO L231 Difference]: Finished difference. Result has 71 places, 53 transitions, 234 flow [2023-09-01 03:31:49,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=234, PETRI_PLACES=71, PETRI_TRANSITIONS=53} [2023-09-01 03:31:49,311 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 12 predicate places. [2023-09-01 03:31:49,311 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 53 transitions, 234 flow [2023-09-01 03:31:49,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 172.75) internal successors, (1382), 8 states have internal predecessors, (1382), 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) [2023-09-01 03:31:49,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:31:49,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:31:49,323 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 (14)] Forceful destruction successful, exit code 0 [2023-09-01 03:31:49,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /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 [2023-09-01 03:31:49,521 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-09-01 03:31:49,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:31:49,522 INFO L85 PathProgramCache]: Analyzing trace with hash 234748073, now seen corresponding path program 1 times [2023-09-01 03:31:49,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:31:49,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [695666506] [2023-09-01 03:31:49,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:31:49,522 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 [2023-09-01 03:31:49,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:31:49,523 INFO L229 MonitoredProcess]: Starting monitored process 15 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) [2023-09-01 03:31:49,525 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 (15)] Waiting until timeout for monitored process [2023-09-01 03:31:49,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:31:49,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 03:31:49,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:31:49,664 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-09-01 03:31:49,664 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 3 case distinctions, treesize of input 15 treesize of output 29 [2023-09-01 03:31:49,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:31:49,688 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:31:49,688 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:31:49,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [695666506] [2023-09-01 03:31:49,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [695666506] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:31:49,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:31:49,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:31:49,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105797622] [2023-09-01 03:31:49,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:31:49,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:31:49,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:31:49,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:31:49,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:31:49,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 409 [2023-09-01 03:31:49,782 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 53 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 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) [2023-09-01 03:31:49,782 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:31:49,782 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 409 [2023-09-01 03:31:49,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:31:53,067 INFO L130 PetriNetUnfolder]: 30210/38784 cut-off events. [2023-09-01 03:31:53,068 INFO L131 PetriNetUnfolder]: For 4566/5391 co-relation queries the response was YES. [2023-09-01 03:31:53,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84307 conditions, 38784 events. 30210/38784 cut-off events. For 4566/5391 co-relation queries the response was YES. Maximal size of possible extension queue 1906. Compared 213171 event pairs, 15358 based on Foata normal form. 825/18305 useless extension candidates. Maximal degree in co-relation 84282. Up to 38307 conditions per place. [2023-09-01 03:31:53,263 INFO L137 encePairwiseOnDemand]: 406/409 looper letters, 47 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2023-09-01 03:31:53,263 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 51 transitions, 326 flow [2023-09-01 03:31:53,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:31:53,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:31:53,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 566 transitions. [2023-09-01 03:31:53,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4612876935615322 [2023-09-01 03:31:53,265 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 566 transitions. [2023-09-01 03:31:53,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 566 transitions. [2023-09-01 03:31:53,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:31:53,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 566 transitions. [2023-09-01 03:31:53,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 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) [2023-09-01 03:31:53,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 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) [2023-09-01 03:31:53,268 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 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) [2023-09-01 03:31:53,268 INFO L175 Difference]: Start difference. First operand has 71 places, 53 transitions, 234 flow. Second operand 3 states and 566 transitions. [2023-09-01 03:31:53,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 51 transitions, 326 flow [2023-09-01 03:31:53,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 51 transitions, 321 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 03:31:53,279 INFO L231 Difference]: Finished difference. Result has 68 places, 51 transitions, 227 flow [2023-09-01 03:31:53,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=227, PETRI_PLACES=68, PETRI_TRANSITIONS=51} [2023-09-01 03:31:53,279 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 9 predicate places. [2023-09-01 03:31:53,279 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 51 transitions, 227 flow [2023-09-01 03:31:53,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 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) [2023-09-01 03:31:53,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:31:53,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:31:53,292 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 (15)] Forceful destruction successful, exit code 0 [2023-09-01 03:31:53,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /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 [2023-09-01 03:31:53,489 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-09-01 03:31:53,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:31:53,489 INFO L85 PathProgramCache]: Analyzing trace with hash 234524665, now seen corresponding path program 1 times [2023-09-01 03:31:53,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:31:53,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2010088470] [2023-09-01 03:31:53,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:31:53,490 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 [2023-09-01 03:31:53,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:31:53,491 INFO L229 MonitoredProcess]: Starting monitored process 16 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) [2023-09-01 03:31:53,494 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 (16)] Waiting until timeout for monitored process [2023-09-01 03:31:53,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:31:53,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 2 conjunts are in the unsatisfiable core [2023-09-01 03:31:53,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:31:53,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:31:53,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:31:53,572 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:31:53,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2010088470] [2023-09-01 03:31:53,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2010088470] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:31:53,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:31:53,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 03:31:53,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385701223] [2023-09-01 03:31:53,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:31:53,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:31:53,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:31:53,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:31:53,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:31:53,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 409 [2023-09-01 03:31:53,580 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 51 transitions, 227 flow. Second operand has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 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) [2023-09-01 03:31:53,580 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:31:53,580 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 409 [2023-09-01 03:31:53,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:31:57,014 INFO L130 PetriNetUnfolder]: 31596/40170 cut-off events. [2023-09-01 03:31:57,014 INFO L131 PetriNetUnfolder]: For 3495/4320 co-relation queries the response was YES. [2023-09-01 03:31:57,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86997 conditions, 40170 events. 31596/40170 cut-off events. For 3495/4320 co-relation queries the response was YES. Maximal size of possible extension queue 2022. Compared 219543 event pairs, 5715 based on Foata normal form. 1659/19157 useless extension candidates. Maximal degree in co-relation 86972. Up to 26499 conditions per place. [2023-09-01 03:31:57,250 INFO L137 encePairwiseOnDemand]: 406/409 looper letters, 66 selfloop transitions, 5 changer transitions 0/74 dead transitions. [2023-09-01 03:31:57,250 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 74 transitions, 420 flow [2023-09-01 03:31:57,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:31:57,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:31:57,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 611 transitions. [2023-09-01 03:31:57,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4979625101874491 [2023-09-01 03:31:57,252 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 611 transitions. [2023-09-01 03:31:57,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 611 transitions. [2023-09-01 03:31:57,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:31:57,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 611 transitions. [2023-09-01 03:31:57,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 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) [2023-09-01 03:31:57,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 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) [2023-09-01 03:31:57,255 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 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) [2023-09-01 03:31:57,255 INFO L175 Difference]: Start difference. First operand has 68 places, 51 transitions, 227 flow. Second operand 3 states and 611 transitions. [2023-09-01 03:31:57,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 74 transitions, 420 flow [2023-09-01 03:31:57,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 74 transitions, 419 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:31:57,265 INFO L231 Difference]: Finished difference. Result has 69 places, 50 transitions, 232 flow [2023-09-01 03:31:57,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=69, PETRI_TRANSITIONS=50} [2023-09-01 03:31:57,266 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 10 predicate places. [2023-09-01 03:31:57,266 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 50 transitions, 232 flow [2023-09-01 03:31:57,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 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) [2023-09-01 03:31:57,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:31:57,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:31:57,273 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 (16)] Ended with exit code 0 [2023-09-01 03:31:57,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /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 [2023-09-01 03:31:57,467 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-09-01 03:31:57,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:31:57,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1312750536, now seen corresponding path program 1 times [2023-09-01 03:31:57,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:31:57,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [164706861] [2023-09-01 03:31:57,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:31:57,467 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 [2023-09-01 03:31:57,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:31:57,468 INFO L229 MonitoredProcess]: Starting monitored process 17 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) [2023-09-01 03:31:57,470 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 (17)] Waiting until timeout for monitored process [2023-09-01 03:31:57,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:31:57,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 03:31:57,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:31:57,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:31:57,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:31:57,740 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 25 treesize of output 21 [2023-09-01 03:31:57,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:31:57,789 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:31:57,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [164706861] [2023-09-01 03:31:57,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [164706861] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:31:57,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:31:57,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-09-01 03:31:57,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403199298] [2023-09-01 03:31:57,789 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:31:57,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 03:31:57,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:31:57,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 03:31:57,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-09-01 03:31:59,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 409 [2023-09-01 03:31:59,196 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 50 transitions, 232 flow. Second operand has 10 states, 10 states have (on average 173.6) internal successors, (1736), 10 states have internal predecessors, (1736), 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) [2023-09-01 03:31:59,197 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:31:59,197 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 409 [2023-09-01 03:31:59,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:32:06,310 INFO L130 PetriNetUnfolder]: 56679/73869 cut-off events. [2023-09-01 03:32:06,310 INFO L131 PetriNetUnfolder]: For 13223/14989 co-relation queries the response was YES. [2023-09-01 03:32:06,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163011 conditions, 73869 events. 56679/73869 cut-off events. For 13223/14989 co-relation queries the response was YES. Maximal size of possible extension queue 3635. Compared 457834 event pairs, 10577 based on Foata normal form. 1766/37352 useless extension candidates. Maximal degree in co-relation 162986. Up to 24832 conditions per place. [2023-09-01 03:32:06,796 INFO L137 encePairwiseOnDemand]: 400/409 looper letters, 159 selfloop transitions, 20 changer transitions 0/181 dead transitions. [2023-09-01 03:32:06,796 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 181 transitions, 947 flow [2023-09-01 03:32:06,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 03:32:06,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 03:32:06,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2058 transitions. [2023-09-01 03:32:06,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45743498555234496 [2023-09-01 03:32:06,800 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2058 transitions. [2023-09-01 03:32:06,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2058 transitions. [2023-09-01 03:32:06,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:32:06,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2058 transitions. [2023-09-01 03:32:06,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 187.0909090909091) internal successors, (2058), 11 states have internal predecessors, (2058), 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) [2023-09-01 03:32:06,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 409.0) internal successors, (4908), 12 states have internal predecessors, (4908), 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) [2023-09-01 03:32:06,806 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 409.0) internal successors, (4908), 12 states have internal predecessors, (4908), 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) [2023-09-01 03:32:06,806 INFO L175 Difference]: Start difference. First operand has 69 places, 50 transitions, 232 flow. Second operand 11 states and 2058 transitions. [2023-09-01 03:32:06,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 181 transitions, 947 flow [2023-09-01 03:32:06,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 181 transitions, 925 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:32:06,812 INFO L231 Difference]: Finished difference. Result has 83 places, 63 transitions, 348 flow [2023-09-01 03:32:06,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=348, PETRI_PLACES=83, PETRI_TRANSITIONS=63} [2023-09-01 03:32:06,813 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 24 predicate places. [2023-09-01 03:32:06,813 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 63 transitions, 348 flow [2023-09-01 03:32:06,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 173.6) internal successors, (1736), 10 states have internal predecessors, (1736), 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) [2023-09-01 03:32:06,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:32:06,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:32:06,820 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 (17)] Forceful destruction successful, exit code 0 [2023-09-01 03:32:07,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /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 [2023-09-01 03:32:07,014 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-09-01 03:32:07,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:32:07,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1312750509, now seen corresponding path program 1 times [2023-09-01 03:32:07,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:32:07,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1555830574] [2023-09-01 03:32:07,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:32:07,015 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 [2023-09-01 03:32:07,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:32:07,016 INFO L229 MonitoredProcess]: Starting monitored process 18 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) [2023-09-01 03:32:07,017 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 (18)] Waiting until timeout for monitored process [2023-09-01 03:32:07,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:32:07,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 03:32:07,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:32:07,190 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:32:07,190 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 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:32:07,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:32:07,476 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:32:07,476 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:32:07,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1555830574] [2023-09-01 03:32:07,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1555830574] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:32:07,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:32:07,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 03:32:07,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135279034] [2023-09-01 03:32:07,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:32:07,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 03:32:07,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:32:07,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 03:32:07,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 03:32:07,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 409 [2023-09-01 03:32:07,894 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 63 transitions, 348 flow. Second operand has 5 states, 5 states have (on average 174.6) internal successors, (873), 5 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) [2023-09-01 03:32:07,894 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:32:07,894 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 409 [2023-09-01 03:32:07,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:32:14,597 INFO L130 PetriNetUnfolder]: 53142/68968 cut-off events. [2023-09-01 03:32:14,597 INFO L131 PetriNetUnfolder]: For 37414/39031 co-relation queries the response was YES. [2023-09-01 03:32:14,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184401 conditions, 68968 events. 53142/68968 cut-off events. For 37414/39031 co-relation queries the response was YES. Maximal size of possible extension queue 3385. Compared 419185 event pairs, 22966 based on Foata normal form. 1617/44744 useless extension candidates. Maximal degree in co-relation 184369. Up to 51474 conditions per place. [2023-09-01 03:32:15,091 INFO L137 encePairwiseOnDemand]: 403/409 looper letters, 72 selfloop transitions, 12 changer transitions 0/86 dead transitions. [2023-09-01 03:32:15,092 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 86 transitions, 582 flow [2023-09-01 03:32:15,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 03:32:15,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 03:32:15,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 924 transitions. [2023-09-01 03:32:15,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45183374083129585 [2023-09-01 03:32:15,094 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 924 transitions. [2023-09-01 03:32:15,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 924 transitions. [2023-09-01 03:32:15,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:32:15,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 924 transitions. [2023-09-01 03:32:15,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 184.8) internal successors, (924), 5 states have internal predecessors, (924), 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) [2023-09-01 03:32:15,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 409.0) internal successors, (2454), 6 states have internal predecessors, (2454), 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) [2023-09-01 03:32:15,097 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 409.0) internal successors, (2454), 6 states have internal predecessors, (2454), 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) [2023-09-01 03:32:15,098 INFO L175 Difference]: Start difference. First operand has 83 places, 63 transitions, 348 flow. Second operand 5 states and 924 transitions. [2023-09-01 03:32:15,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 86 transitions, 582 flow [2023-09-01 03:32:16,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 86 transitions, 565 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-09-01 03:32:16,061 INFO L231 Difference]: Finished difference. Result has 84 places, 63 transitions, 363 flow [2023-09-01 03:32:16,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=363, PETRI_PLACES=84, PETRI_TRANSITIONS=63} [2023-09-01 03:32:16,061 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 25 predicate places. [2023-09-01 03:32:16,061 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 63 transitions, 363 flow [2023-09-01 03:32:16,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 174.6) internal successors, (873), 5 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) [2023-09-01 03:32:16,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:32:16,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:32:16,071 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 (18)] Forceful destruction successful, exit code 0 [2023-09-01 03:32:16,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /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 [2023-09-01 03:32:16,269 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-09-01 03:32:16,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:32:16,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1319717587, now seen corresponding path program 1 times [2023-09-01 03:32:16,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:32:16,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1130546186] [2023-09-01 03:32:16,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:32:16,270 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 [2023-09-01 03:32:16,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:32:16,270 INFO L229 MonitoredProcess]: Starting monitored process 19 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) [2023-09-01 03:32:16,272 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 (19)] Waiting until timeout for monitored process [2023-09-01 03:32:16,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:32:16,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 03:32:16,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:32:16,422 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:32:16,422 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 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:32:16,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:32:16,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:32:16,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:32:16,940 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:32:16,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1130546186] [2023-09-01 03:32:16,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1130546186] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:32:16,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:32:16,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 03:32:16,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337458083] [2023-09-01 03:32:16,941 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:32:16,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 03:32:16,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:32:16,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 03:32:16,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-09-01 03:32:21,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 409 [2023-09-01 03:32:21,694 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 63 transitions, 363 flow. Second operand has 11 states, 11 states have (on average 169.45454545454547) internal successors, (1864), 11 states have internal predecessors, (1864), 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) [2023-09-01 03:32:21,694 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:32:21,694 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 409 [2023-09-01 03:32:21,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:32:28,747 INFO L130 PetriNetUnfolder]: 49643/64865 cut-off events. [2023-09-01 03:32:28,748 INFO L131 PetriNetUnfolder]: For 78591/83995 co-relation queries the response was YES. [2023-09-01 03:32:29,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181182 conditions, 64865 events. 49643/64865 cut-off events. For 78591/83995 co-relation queries the response was YES. Maximal size of possible extension queue 3187. Compared 390279 event pairs, 26496 based on Foata normal form. 5526/48251 useless extension candidates. Maximal degree in co-relation 181150. Up to 56012 conditions per place. [2023-09-01 03:32:29,210 INFO L137 encePairwiseOnDemand]: 402/409 looper letters, 118 selfloop transitions, 7 changer transitions 0/128 dead transitions. [2023-09-01 03:32:29,210 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 128 transitions, 879 flow [2023-09-01 03:32:29,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 03:32:29,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 03:32:29,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1438 transitions. [2023-09-01 03:32:29,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4394865525672372 [2023-09-01 03:32:29,213 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1438 transitions. [2023-09-01 03:32:29,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1438 transitions. [2023-09-01 03:32:29,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:32:29,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1438 transitions. [2023-09-01 03:32:29,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 179.75) internal successors, (1438), 8 states have internal predecessors, (1438), 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) [2023-09-01 03:32:29,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 409.0) internal successors, (3681), 9 states have internal predecessors, (3681), 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) [2023-09-01 03:32:29,218 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 409.0) internal successors, (3681), 9 states have internal predecessors, (3681), 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) [2023-09-01 03:32:29,218 INFO L175 Difference]: Start difference. First operand has 84 places, 63 transitions, 363 flow. Second operand 8 states and 1438 transitions. [2023-09-01 03:32:29,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 128 transitions, 879 flow [2023-09-01 03:32:29,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 128 transitions, 847 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 03:32:29,307 INFO L231 Difference]: Finished difference. Result has 89 places, 64 transitions, 364 flow [2023-09-01 03:32:29,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=364, PETRI_PLACES=89, PETRI_TRANSITIONS=64} [2023-09-01 03:32:29,308 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 30 predicate places. [2023-09-01 03:32:29,308 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 64 transitions, 364 flow [2023-09-01 03:32:29,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 169.45454545454547) internal successors, (1864), 11 states have internal predecessors, (1864), 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) [2023-09-01 03:32:29,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:32:29,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:32:29,322 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 (19)] Forceful destruction successful, exit code 0 [2023-09-01 03:32:29,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /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 [2023-09-01 03:32:29,522 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-09-01 03:32:29,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:32:29,522 INFO L85 PathProgramCache]: Analyzing trace with hash -2040558231, now seen corresponding path program 1 times [2023-09-01 03:32:29,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:32:29,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [575022398] [2023-09-01 03:32:29,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:32:29,523 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 [2023-09-01 03:32:29,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:32:29,524 INFO L229 MonitoredProcess]: Starting monitored process 20 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) [2023-09-01 03:32:29,525 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 (20)] Waiting until timeout for monitored process [2023-09-01 03:32:29,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:32:29,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 2 conjunts are in the unsatisfiable core [2023-09-01 03:32:29,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:32:29,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:32:29,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:32:29,630 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:32:29,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [575022398] [2023-09-01 03:32:29,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [575022398] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:32:29,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:32:29,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 03:32:29,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267003314] [2023-09-01 03:32:29,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:32:29,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:32:29,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:32:29,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:32:29,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:32:29,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 409 [2023-09-01 03:32:29,639 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 64 transitions, 364 flow. Second operand has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 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) [2023-09-01 03:32:29,640 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:32:29,640 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 409 [2023-09-01 03:32:29,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:32:34,949 INFO L130 PetriNetUnfolder]: 44932/58675 cut-off events. [2023-09-01 03:32:34,949 INFO L131 PetriNetUnfolder]: For 45564/53205 co-relation queries the response was YES. [2023-09-01 03:32:35,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160499 conditions, 58675 events. 44932/58675 cut-off events. For 45564/53205 co-relation queries the response was YES. Maximal size of possible extension queue 2940. Compared 359926 event pairs, 7433 based on Foata normal form. 8881/47663 useless extension candidates. Maximal degree in co-relation 160465. Up to 43614 conditions per place. [2023-09-01 03:32:35,393 INFO L137 encePairwiseOnDemand]: 406/409 looper letters, 73 selfloop transitions, 7 changer transitions 0/85 dead transitions. [2023-09-01 03:32:35,393 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 85 transitions, 580 flow [2023-09-01 03:32:35,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:32:35,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:32:35,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 609 transitions. [2023-09-01 03:32:35,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4963325183374083 [2023-09-01 03:32:35,395 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 609 transitions. [2023-09-01 03:32:35,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 609 transitions. [2023-09-01 03:32:35,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:32:35,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 609 transitions. [2023-09-01 03:32:35,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 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) [2023-09-01 03:32:35,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 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) [2023-09-01 03:32:35,397 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 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) [2023-09-01 03:32:35,397 INFO L175 Difference]: Start difference. First operand has 89 places, 64 transitions, 364 flow. Second operand 3 states and 609 transitions. [2023-09-01 03:32:35,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 85 transitions, 580 flow [2023-09-01 03:32:35,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 85 transitions, 575 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:32:35,467 INFO L231 Difference]: Finished difference. Result has 89 places, 62 transitions, 359 flow [2023-09-01 03:32:35,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=359, PETRI_PLACES=89, PETRI_TRANSITIONS=62} [2023-09-01 03:32:35,467 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 30 predicate places. [2023-09-01 03:32:35,468 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 62 transitions, 359 flow [2023-09-01 03:32:35,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 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) [2023-09-01 03:32:35,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:32:35,468 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:32:35,475 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 (20)] Forceful destruction successful, exit code 0 [2023-09-01 03:32:35,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /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 [2023-09-01 03:32:35,668 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-09-01 03:32:35,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:32:35,669 INFO L85 PathProgramCache]: Analyzing trace with hash -761061214, now seen corresponding path program 2 times [2023-09-01 03:32:35,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:32:35,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1551478601] [2023-09-01 03:32:35,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:32:35,669 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 [2023-09-01 03:32:35,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:32:35,670 INFO L229 MonitoredProcess]: Starting monitored process 21 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) [2023-09-01 03:32:35,672 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 (21)] Waiting until timeout for monitored process [2023-09-01 03:32:35,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:32:35,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:32:35,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 03:32:35,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:32:35,845 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:32:35,846 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 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:32:36,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 03:32:36,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:32:36,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 03:32:36,586 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:32:36,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1551478601] [2023-09-01 03:32:36,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1551478601] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:32:36,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:32:36,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-09-01 03:32:36,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811547820] [2023-09-01 03:32:36,586 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:32:36,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 03:32:36,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:32:36,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 03:32:36,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-09-01 03:32:41,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 409 [2023-09-01 03:32:41,659 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 62 transitions, 359 flow. Second operand has 12 states, 12 states have (on average 171.33333333333334) internal successors, (2056), 12 states have internal predecessors, (2056), 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) [2023-09-01 03:32:41,659 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:32:41,659 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 409 [2023-09-01 03:32:41,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:32:57,891 INFO L130 PetriNetUnfolder]: 107393/138543 cut-off events. [2023-09-01 03:32:57,891 INFO L131 PetriNetUnfolder]: For 146347/158019 co-relation queries the response was YES. [2023-09-01 03:32:58,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 380869 conditions, 138543 events. 107393/138543 cut-off events. For 146347/158019 co-relation queries the response was YES. Maximal size of possible extension queue 6067. Compared 891159 event pairs, 10427 based on Foata normal form. 15800/107566 useless extension candidates. Maximal degree in co-relation 380835. Up to 29328 conditions per place. [2023-09-01 03:32:59,087 INFO L137 encePairwiseOnDemand]: 400/409 looper letters, 224 selfloop transitions, 19 changer transitions 0/246 dead transitions. [2023-09-01 03:32:59,088 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 246 transitions, 1609 flow [2023-09-01 03:32:59,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 03:32:59,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 03:32:59,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2055 transitions. [2023-09-01 03:32:59,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.456768170704601 [2023-09-01 03:32:59,093 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2055 transitions. [2023-09-01 03:32:59,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2055 transitions. [2023-09-01 03:32:59,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:32:59,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2055 transitions. [2023-09-01 03:32:59,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 186.8181818181818) internal successors, (2055), 11 states have internal predecessors, (2055), 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) [2023-09-01 03:32:59,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 409.0) internal successors, (4908), 12 states have internal predecessors, (4908), 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) [2023-09-01 03:32:59,226 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 409.0) internal successors, (4908), 12 states have internal predecessors, (4908), 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) [2023-09-01 03:32:59,226 INFO L175 Difference]: Start difference. First operand has 89 places, 62 transitions, 359 flow. Second operand 11 states and 2055 transitions. [2023-09-01 03:32:59,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 246 transitions, 1609 flow [2023-09-01 03:32:59,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 246 transitions, 1577 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 03:32:59,358 INFO L231 Difference]: Finished difference. Result has 101 places, 71 transitions, 447 flow [2023-09-01 03:32:59,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=447, PETRI_PLACES=101, PETRI_TRANSITIONS=71} [2023-09-01 03:32:59,359 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 42 predicate places. [2023-09-01 03:32:59,359 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 71 transitions, 447 flow [2023-09-01 03:32:59,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 171.33333333333334) internal successors, (2056), 12 states have internal predecessors, (2056), 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) [2023-09-01 03:32:59,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:32:59,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:32:59,370 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 (21)] Ended with exit code 0 [2023-09-01 03:32:59,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /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 [2023-09-01 03:32:59,570 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-09-01 03:32:59,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:32:59,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1173589599, now seen corresponding path program 1 times [2023-09-01 03:32:59,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:32:59,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [157660799] [2023-09-01 03:32:59,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:32:59,571 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 [2023-09-01 03:32:59,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:32:59,572 INFO L229 MonitoredProcess]: Starting monitored process 22 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) [2023-09-01 03:32:59,573 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 (22)] Waiting until timeout for monitored process [2023-09-01 03:32:59,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:32:59,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 03:32:59,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:32:59,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:32:59,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:32:59,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:32:59,900 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:32:59,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [157660799] [2023-09-01 03:32:59,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [157660799] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:32:59,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:32:59,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-09-01 03:32:59,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670118679] [2023-09-01 03:32:59,901 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:32:59,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 03:32:59,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:32:59,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 03:32:59,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-09-01 03:33:00,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 409 [2023-09-01 03:33:00,339 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 71 transitions, 447 flow. Second operand has 10 states, 10 states have (on average 175.0) internal successors, (1750), 10 states have internal predecessors, (1750), 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) [2023-09-01 03:33:00,339 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:33:00,339 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 409 [2023-09-01 03:33:00,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:33:12,637 INFO L130 PetriNetUnfolder]: 86839/116346 cut-off events. [2023-09-01 03:33:12,637 INFO L131 PetriNetUnfolder]: For 192952/211048 co-relation queries the response was YES. [2023-09-01 03:33:13,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 373801 conditions, 116346 events. 86839/116346 cut-off events. For 192952/211048 co-relation queries the response was YES. Maximal size of possible extension queue 3911. Compared 751387 event pairs, 49645 based on Foata normal form. 18096/116116 useless extension candidates. Maximal degree in co-relation 373762. Up to 94316 conditions per place. [2023-09-01 03:33:13,714 INFO L137 encePairwiseOnDemand]: 400/409 looper letters, 130 selfloop transitions, 7 changer transitions 0/141 dead transitions. [2023-09-01 03:33:13,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 141 transitions, 1064 flow [2023-09-01 03:33:13,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 03:33:13,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 03:33:13,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1477 transitions. [2023-09-01 03:33:13,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4514058679706601 [2023-09-01 03:33:13,716 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1477 transitions. [2023-09-01 03:33:13,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1477 transitions. [2023-09-01 03:33:13,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:33:13,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1477 transitions. [2023-09-01 03:33:13,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 184.625) internal successors, (1477), 8 states have internal predecessors, (1477), 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) [2023-09-01 03:33:13,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 409.0) internal successors, (3681), 9 states have internal predecessors, (3681), 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) [2023-09-01 03:33:13,720 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 409.0) internal successors, (3681), 9 states have internal predecessors, (3681), 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) [2023-09-01 03:33:13,720 INFO L175 Difference]: Start difference. First operand has 101 places, 71 transitions, 447 flow. Second operand 8 states and 1477 transitions. [2023-09-01 03:33:13,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 141 transitions, 1064 flow [2023-09-01 03:33:13,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 141 transitions, 1045 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-09-01 03:33:13,937 INFO L231 Difference]: Finished difference. Result has 108 places, 73 transitions, 468 flow [2023-09-01 03:33:13,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=468, PETRI_PLACES=108, PETRI_TRANSITIONS=73} [2023-09-01 03:33:13,937 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 49 predicate places. [2023-09-01 03:33:13,937 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 73 transitions, 468 flow [2023-09-01 03:33:13,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 175.0) internal successors, (1750), 10 states have internal predecessors, (1750), 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) [2023-09-01 03:33:13,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:33:13,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:33:13,945 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 (22)] Forceful destruction successful, exit code 0 [2023-09-01 03:33:14,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /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 [2023-09-01 03:33:14,139 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-09-01 03:33:14,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:33:14,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1822482052, now seen corresponding path program 1 times [2023-09-01 03:33:14,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:33:14,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1011703756] [2023-09-01 03:33:14,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:33:14,140 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 [2023-09-01 03:33:14,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:33:14,141 INFO L229 MonitoredProcess]: Starting monitored process 23 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) [2023-09-01 03:33:14,142 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 (23)] Waiting until timeout for monitored process [2023-09-01 03:33:14,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:33:14,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 03:33:14,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:33:14,308 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2023-09-01 03:33:14,308 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 3 case distinctions, treesize of input 17 treesize of output 44 [2023-09-01 03:33:14,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:33:14,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:33:14,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:33:14,968 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:33:14,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1011703756] [2023-09-01 03:33:14,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1011703756] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:33:14,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-09-01 03:33:14,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2023-09-01 03:33:14,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813352578] [2023-09-01 03:33:14,969 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-09-01 03:33:14,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 03:33:14,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:33:14,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 03:33:14,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-09-01 03:33:20,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 409 [2023-09-01 03:33:20,112 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 73 transitions, 468 flow. Second operand has 12 states, 12 states have (on average 169.83333333333334) internal successors, (2038), 12 states have internal predecessors, (2038), 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) [2023-09-01 03:33:20,112 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:33:20,112 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 409 [2023-09-01 03:33:20,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:33:37,100 INFO L130 PetriNetUnfolder]: 110315/142336 cut-off events. [2023-09-01 03:33:37,100 INFO L131 PetriNetUnfolder]: For 178018/185539 co-relation queries the response was YES. [2023-09-01 03:33:38,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 490634 conditions, 142336 events. 110315/142336 cut-off events. For 178018/185539 co-relation queries the response was YES. Maximal size of possible extension queue 6549. Compared 910361 event pairs, 61381 based on Foata normal form. 7543/124274 useless extension candidates. Maximal degree in co-relation 490592. Up to 127332 conditions per place. [2023-09-01 03:33:38,615 INFO L137 encePairwiseOnDemand]: 402/409 looper letters, 103 selfloop transitions, 8 changer transitions 3/118 dead transitions. [2023-09-01 03:33:38,616 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 118 transitions, 876 flow [2023-09-01 03:33:38,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 03:33:38,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 03:33:38,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1424 transitions. [2023-09-01 03:33:38,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4352078239608802 [2023-09-01 03:33:38,618 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1424 transitions. [2023-09-01 03:33:38,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1424 transitions. [2023-09-01 03:33:38,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:33:38,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1424 transitions. [2023-09-01 03:33:38,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 178.0) internal successors, (1424), 8 states have internal predecessors, (1424), 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) [2023-09-01 03:33:38,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 409.0) internal successors, (3681), 9 states have internal predecessors, (3681), 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) [2023-09-01 03:33:38,624 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 409.0) internal successors, (3681), 9 states have internal predecessors, (3681), 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) [2023-09-01 03:33:38,624 INFO L175 Difference]: Start difference. First operand has 108 places, 73 transitions, 468 flow. Second operand 8 states and 1424 transitions. [2023-09-01 03:33:38,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 118 transitions, 876 flow [2023-09-01 03:33:40,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 118 transitions, 861 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-09-01 03:33:40,852 INFO L231 Difference]: Finished difference. Result has 110 places, 68 transitions, 442 flow [2023-09-01 03:33:40,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=442, PETRI_PLACES=110, PETRI_TRANSITIONS=68} [2023-09-01 03:33:40,853 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 51 predicate places. [2023-09-01 03:33:40,853 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 68 transitions, 442 flow [2023-09-01 03:33:40,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 169.83333333333334) internal successors, (2038), 12 states have internal predecessors, (2038), 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) [2023-09-01 03:33:40,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:33:40,854 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:33:40,863 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 (23)] Forceful destruction successful, exit code 0 [2023-09-01 03:33:41,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /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 [2023-09-01 03:33:41,057 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-09-01 03:33:41,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:33:41,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1901873738, now seen corresponding path program 1 times [2023-09-01 03:33:41,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-09-01 03:33:41,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1692468198] [2023-09-01 03:33:41,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:33:41,058 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 [2023-09-01 03:33:41,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-09-01 03:33:41,059 INFO L229 MonitoredProcess]: Starting monitored process 24 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) [2023-09-01 03:33:41,060 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 (24)] Waiting until timeout for monitored process [2023-09-01 03:33:41,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:33:41,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 03:33:41,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:33:41,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 03:33:41,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:33:41,204 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-09-01 03:33:41,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1692468198] [2023-09-01 03:33:41,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1692468198] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:33:41,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:33:41,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:33:41,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765116510] [2023-09-01 03:33:41,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:33:41,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:33:41,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-09-01 03:33:41,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:33:41,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:33:41,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 409 [2023-09-01 03:33:41,329 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 68 transitions, 442 flow. Second operand has 4 states, 4 states have (on average 181.25) internal successors, (725), 4 states have internal predecessors, (725), 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) [2023-09-01 03:33:41,329 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:33:41,329 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 409 [2023-09-01 03:33:41,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:33:51,910 INFO L130 PetriNetUnfolder]: 71239/93303 cut-off events. [2023-09-01 03:33:51,910 INFO L131 PetriNetUnfolder]: For 126811/141470 co-relation queries the response was YES. [2023-09-01 03:33:52,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313902 conditions, 93303 events. 71239/93303 cut-off events. For 126811/141470 co-relation queries the response was YES. Maximal size of possible extension queue 4391. Compared 596898 event pairs, 42557 based on Foata normal form. 21787/100119 useless extension candidates. Maximal degree in co-relation 313861. Up to 93186 conditions per place.